前言

　　MyBatis官网：http://www.mybatis.org/mybatis-3/zh/index.html

　　本文记录springboot与mybatis的整合实例；1、以注解方式；2、手写XML配置、逆向工程生成XML配置

　　maven依赖

  1.         <!-- springboot -->
  2.         <dependency>
  3.             <groupId>org.springframework.boot</groupId>
  4.             <artifactId>spring-boot-starter-web</artifactId>
  5.         </dependency>
  6.  
  7.         <!-- MVC -->
  8.         <dependency>
  9.             <groupId>org.springframework.boot</groupId>
  10.             <artifactId>spring-boot-starter-test</artifactId>
  11.             <scope>test</scope>
  12.         </dependency>
  13.  
  14.         <!--Thymeleaf模板依赖-->
  15.         <dependency>
  16.             <groupId>org.springframework.boot</groupId>
  17.             <artifactId>spring-boot-starter-thymeleaf</artifactId>
  18.         </dependency>
  19.  
  20.         <!--热部署工具dev-tools-->
  21.         <dependency>
  22.             <groupId>org.springframework.boot</groupId>
  23.             <artifactId>spring-boot-devtools</artifactId>
  24.             <scope>runtime</scope>
  25.         </dependency>
  26.  
  27.         <!--添加MyBatis依赖 -->
  28.         <dependency>
  29.             <groupId>org.mybatis.spring.boot</groupId>
  30.             <artifactId>mybatis-spring-boot-starter</artifactId>
  31.             <version>1.3.1</version>
  32.         </dependency>
  33.  
  34.         <!--添加MySQL驱动依赖 -->
  35.         <dependency>
  36.             <groupId>mysql</groupId>
  37.             <artifactId>mysql-connector-java</artifactId>
  38.             <scope>runtime</scope>
  39.         </dependency>

　　application.yml

  1. #注意:在yml文件中添加value值时,value前面需要加一个空格
  2. #2.0.0的配置切换为servlet.path而不是"-"
  3. server:
  4.   port:  #端口号
  5.   servlet:
  6.     context-path: /springboot
  7.  
  8. spring:
  9.     thymeleaf:
  10.       cache: false  #关闭页面缓存
  11.       prefix: classpath:/view/  #thymeleaf访问根路径
  12.       mode: LEGACYHTML5
  13.  
  14.     datasource: #数据库相关
  15.       url: jdbc:mysql://localhost:/test?characterEncoding=utf-
  16.       username: root
  17.       password:
  18.       driver-class-name: com.mysql.jdbc.Driver
  19.     mvc:
  20.       date-format: yyyy-MM-dd HH:mm:ss #mvc接收参数时对日期进行格式化
  21.  
  22.     jackson:
  23.       date-format: yyyy-MM-dd HH:mm:ss #jackson对响应回去的日期参数进行格式化
  24.       time-zone: GMT+
  25.  
  26. mybatis:
  27.   configuration:
  28.    map-underscore-to-camel-case: true #开启驼峰映射

　　result，通用响应数据格式

　　注：不想自己写set、get方法的用lombok插件

  1. public class Result {
  2.  
  3.     private String message;
  4.  
  5.     private Integer status;
  6.  
  7.     private Object data;
  8.  
  9.     public Result() {
  10.     }
  11.  
  12.     public Result(String message, Integer status, Object data) {
  13.         this.message = message;
  14.         this.status = status;
  15.         this.data = data;
  16.     }
  17.  
  18.     public String getMessage() {
  19.         return message;
  20.     }
  21.  
  22.     public void setMessage(String message) {
  23.         this.message = message;
  24.     }
  25.  
  26.     public Integer getStatus() {
  27.         return status;
  28.     }
  29.  
  30.     public void setStatus(Integer status) {
  31.         this.status = status;
  32.     }
  33.  
  34.     public Object getData() {
  35.         return data;
  36.     }
  37.  
  38.     public void setData(Object data) {
  39.         this.data = data;
  40.     }
  41.  
  42.     @Override
  43.     public String toString() {
  44.         return "Result{" +
  45.                 "message='" + message + '\'' +
  46.                 ", status=" + status +
  47.                 ", data=" + data +
  48.                 '}';
  49.     }
  50.  
  51.     public static Result build(Integer status,String message,Object data){
  52.             return new Result(message,status,data);
  53.     }
  54. }

　　user，实体类

　　注：不想自己写set、get方法的用lombok插件

  1. public class User {
  2.  
  3.     private Integer id;
  4.  
  5.     private String username;
  6.  
  7.     private String password;
  8.  
  9.     private Date created;
  10.  
  11.     public User(){}
  12.  
  13.     public Integer getId() {
  14.         return id;
  15.     }
  16.  
  17.     public void setId(Integer id) {
  18.         this.id = id;
  19.     }
  20.  
  21.     public String getUsername() {
  22.         return username;
  23.     }
  24.  
  25.     public void setUsername(String username) {
  26.         this.username = username;
  27.     }
  28.  
  29.     public String getPassword() {
  30.         return password;
  31.     }
  32.  
  33.     public void setPassword(String password) {
  34.         this.password = password;
  35.     }
  36.  
  37.     public Date getCreated() {
  38.         return created;
  39.     }
  40.  
  41.     public void setCreated(Date created) {
  42.         this.created = created;
  43.     }
  44.  
  45.     @Override
  46.     public String toString() {
  47.         return "User{" +
  48.                 "id=" + id +
  49.                 ", username='" + username + '\'' +
  50.                 ", password='" + password + '\'' +
  51.                 ", created=" + created +
  52.                 '}';
  53.     }
  54. }

　　表SQL

  1. DROP TABLE IF EXISTS `tb_user`;
  2. CREATE TABLE `tb_user`  (
  3.   `id` int(11) NOT NULL AUTO_INCREMENT COMMENT '表id',
  4.   `username` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '用户名',
  5.   `password` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '密码',
  6.   `created` datetime NULL DEFAULT NULL COMMENT '创建时间',PRIMARY KEY (`id`) USING BTREE
  7. ) ENGINE = InnoDB AUTO_INCREMENT = 45 CHARACTER SET = utf8 COLLATE = utf8_general_ci COMMENT = '用户信息表' ROW_FORMAT = Compact;

　　controller

  1. @RestController
  2. @RequestMapping("/user")
  3. public class UserController {
  4.  
  5.     @Autowired
  6.     private UserService userService;
  7.  
  8.     @RequestMapping("/insert")
  9.     public Result insert(User user) {
  10.         return  userService.insert(user);
  11.     }
  12.  
  13.     @RequestMapping("/delete")
  14.     public Result delete(User user) {
  15.         return  userService.delete(user);
  16.     }
  17.  
  18.     @RequestMapping("/update")
  19.     public Result update(User user) {
  20.         return  userService.update(user);
  21.     }
  22.  
  23.     @RequestMapping("/select")
  24.     public Result select(User user) {
  25.         return  userService.select(user);
  26.     }
  27. }

　　service

  1. public interface UserService {
  2.  
  3.     /**
  4.      * 增
  5.      */
  6.     Result insert(User user);
  7.  
  8.     /**
  9.      * 删
  10.      */
  11.     Result delete(User user);
  12.  
  13.     /**
  14.      * 改
  15.      */
  16.     Result update(User user);
  17.  
  18.     /**
  19.      * 查
  20.      */
  21.     Result select(User user);
  22. }
  1. @Service
  2. public class UserServiceImpl implements UserService {
  3.  
  4.     @Autowired
  5.     private UserMapper userMapper;
  6.  
  7.     @Override
  8.     public Result insert(User user) {
  9.         int i = userMapper.insert(user);
  10.         if (i > 0) {
  11.             return Result.build(200, "操作成功！", user);
  12.         } else {
  13.             return Result.build(400, "操作失败！", null);
  14.         }
  15.     }
  16.  
  17.     @Override
  18.     public Result delete(User user) {
  19.         int i = userMapper.delete(user);
  20.         if (i > 0) {
  21.             return Result.build(200, "操作成功！", user);
  22.         } else {
  23.             return Result.build(400, "操作失败！", null);
  24.         }
  25.     }
  26.  
  27.     @Override
  28.     public Result update(User user) {
  29.         int i = userMapper.update(user);
  30.         if (i > 0) {
  31.             return select(user);
  32.         } else {
  33.             return Result.build(400, "操作失败！", null);
  34.         }
  35.     }
  36.  
  37.     @Override
  38.     public Result select(User user) {
  39.         User user1 = userMapper.select(user);
  40.         if (user1 != null) {
  41.             return Result.build(200, "操作成功！", user1);
  42.         } else {
  43.             return Result.build(400, "操作失败！", user1);
  44.         }
  45.     }
  46. }

　　

　　接下来不同就是mapper映射了

　　注解方式

　　工程结构

　　mapper.java

　　直接使用注解，@Insert、@Delete、@Update、@Select，前三个事务自动提交，不用我们管理；增、删、改返回的是影响的行数，当设置了主键自动递增，需要返回自增主键时添加@Options(useGeneratedKeys = true)，设置是否获取主键并设置到模型实体属性中；注意：insert接口返回的依旧是受影响的行数，但自增主键已经设置到了模型实体属性中。

　　这里介绍以下占位符跟拼接符的区别：

　　占位符 #{param}
　　占位符在拼接sql的过程中，会给指定的占位符，加上引号
　　简单类型传参：
　　1、会忽略占位符的名字
　　2、会忽略占位符的数据类型
　　3、会忽略占位符的顺序，将传进去的参加，依次赋给所有的占位符
　　适用场景：
　　单一占位符传参查询

　　拼接符 ${param}
　　拼接符相当于连接符合，把左右两边、自己拼接在一起
　　1、不接受简单类型传参，只接收对象类型或者Map集合类型传参
　　2、动态指定表名，列名，排序的方式（升序or降序）

  1. @Mapper
  2. @Component(value = "UserMapper")
  3. public interface UserMapper {
  4.  
  5.     /**
  6.      * 增
  7.      */
  8.     @Insert(value = "insert into tb_user(username,password,created) value(#{username},#{password},#{created})")
  9.     @Options(useGeneratedKeys = true)
  10.     int insert(User user);
  11.  
  12.     /**
  13.      * 删
  14.      */
  15.     @Delete("delete from tb_user where id = #{id}")
  16.     int delete(User user);
  17.  
  18.     /**
  19.      * 改
  20.      */
  21.     @Update(value = "update tb_user set username = #{username} where id = #{id}")
  22.     int update(User user);
  23.  
  24.     /**
  25.      * 查
  26.      */
  27.     @Select(value = "select * from tb_user where id = #{id}")
  28.     User select(User user);
  29.  
  30. }

　　配置XML

　　工程目录

　　加多了mybatis相关的XML配置文件

　　其他部分都没有变，变的只有以下部分：

　　application.yml的mybatis部分改成，

  1. mybatis:
  2.  
  3.   # 配置mapper的扫描，找到所有的mapper.xml映射文件
  4.   mapperLocations: classpath:conf/mybatis/mapper/*.xml
  5.  
  6.   # 加载全局的配置文件
  7.   configLocation: classpath:conf/mybatis/mybatis.cfg.xml

　　mapper.java

　　不再使用注解，将SQL写到XML里面

  1. @Mapper
  2. @Component(value = "UserMapper")
  3. public interface UserMapper {
  4.  
  5.     /**
  6.      * 增
  7.      */
  8.     int insert(User user);
  9.  
  10.     /**
  11.      * 删
  12.      */
  13.     int delete(User user);
  14.  
  15.     /**
  16.      * 改
  17.      */
  18.     int update(User user);
  19.  
  20.     /**
  21.      * 查
  22.      */
  23.     User select(User user);
  24.  
  25. }

　　mybatis.cgf.xml

　　这里配置全局设置，但我这里没什么要配的

  1. <?xml version="1.0" encoding="UTF-8" ?>
  2. <!DOCTYPE configuration
  3.         PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
  4.         "http://mybatis.org/dtd/mybatis-3-config.dtd">
  5. <!-- 全局配置文件 -->
  6. <configuration>
  7.  
  8. </configuration>

　　UserMapper.xml

　　因为我们的表主键是自动递增，insert标签使用useGeneratedKeys="true"  keyProperty="id"，模型实体属性就会设置递增后的值

  1. <?xml version="1.0" encoding="UTF-8" ?>
  2. <!DOCTYPE mapper
  3.         PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
  4.         "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
  5. <mapper namespace="cn.mapper.UserMapper">
  6.  
  7.     <insert id="insert" useGeneratedKeys="true" keyProperty="id" parameterType="cn.pojo.User">
  8.         insert into tb_user(username,password,created) value(#{username},#{password},#{created})
  9.     </insert>
  10.  
  11.     <delete id="delete" parameterType="cn.pojo.User">
  12.         delete from tb_user where id = #{id}
  13.     </delete>
  14.  
  15.     <update id="update" parameterType="cn.pojo.User">
  16.         update tb_user set username = #{username} where id = #{id}
  17.     </update>
  18.  
  19.     <select id="select" parameterType="cn.pojo.User" resultType="cn.pojo.User">
  20.         select * from tb_user where id = #{id}
  21.     </select>
  22.  
  23. </mapper>

　　逆向工程

　　注意：本逆向工程例子是我之前毕业设计的表为操作对象，为了方便介绍，我直接用之前的项目做介绍

　　数据库单表逆向生成单表对应的pojo实体、mapper.java、mapper.xml，无需手写这几个文件，生成的接口方法已经足够满足大部分业务需求，实现快速开发，关于逆向工程的具体配置，请戳官网介绍：https://www.cnblogs.com/nzbin/p/8117535.html 或这篇博客：Mybatis(七) mybatis的逆向工程的配置详解

　　逆向工程项目结构

　　逆向工程配置文件genreatorConfig.xml,名字无所谓,只要在java程序中作为file传入就好  （存放生成文件的对应的包要提前建好，否则会找不到）

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <!DOCTYPE generatorConfiguration
  3.   PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
  4.   "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">
  5.  
  6. <generatorConfiguration>
  7.     <context id="testTables" targetRuntime="MyBatis3">
  8.         <commentGenerator>
  9.             <!-- 是否去除自动生成的注释 true：是 ： false:否 -->
  10.             <property name="suppressAllComments" value="true" />
  11.         </commentGenerator>
  12.         <!--数据库连接的信息：驱动类、连接地址、用户名、密码 -->
  13.         <jdbcConnection driverClass="com.mysql.jdbc.Driver"
  14.             connectionURL="jdbc:mysql://localhost:3306/cpsh" userId="root"
  15.             password="123456">
  16.         </jdbcConnection>
  17.         <!-- 默认false，把JDBC DECIMAL 和 NUMERIC 类型解析为 Integer，为 true时把JDBC DECIMAL 和
  18.             NUMERIC 类型解析为java.math.BigDecimal -->
  19.         <javaTypeResolver>
  20.             <property name="forceBigDecimals" value="false" />
  21.         </javaTypeResolver>
  22.  
  23.         <!-- targetProject:生成PO类的位置 -->
  24.         <javaModelGenerator targetPackage="cn.gx.hzu.cpsh.common.pojo"
  25.             targetProject=".\src">
  26.             <!-- enableSubPackages:是否让schema作为包的后缀 -->
  27.             <property name="enableSubPackages" value="false" />
  28.             <!-- 从数据库返回的值被清理前后的空格 -->
  29.             <property name="trimStrings" value="true" />
  30.         </javaModelGenerator>
  31.         <!-- targetProject:mapper映射文件.xml生成的位置 -->
  32.         <sqlMapGenerator targetPackage="cn.gx.hzu.cpsh.common.mapper"
  33.             targetProject=".\src">
  34.             <!-- enableSubPackages:是否让schema作为包的后缀 -->
  35.             <property name="enableSubPackages" value="false" />
  36.         </sqlMapGenerator>
  37.         <!-- targetPackage：mapper接口.java生成的位置 -->
  38.         <javaClientGenerator type="XMLMAPPER"
  39.             targetPackage="cn.gx.hzu.cpsh.common.mapper"
  40.             targetProject=".\src">
  41.             <!-- enableSubPackages:是否让schema作为包的后缀 -->
  42.             <property name="enableSubPackages" value="false" />
  43.         </javaClientGenerator>
  44.         <!-- 指定数据库表 -->
  45.         <table schema="" tableName="t_ad"></table>
  46.         <table schema="" tableName="t_admin"></table>
  47.         <table schema="" tableName="t_ad_position"></table>
  48.         <table schema="" tableName="t_chat"></table>
  49.         <table schema="" tableName="t_purchase"></table>
  50.         <table schema="" tableName="t_recommend"></table>
  51.         <table schema="" tableName="t_sell"></table>
  52.         <table schema="" tableName="t_type"></table>
  53.         <table schema="" tableName="t_user"></table>
  54.         <table schema="" tableName="t_user_datum"></table>
  55.         <table schema="" tableName="t_notice"></table>
  56.  
  57.     </context>
  58. </generatorConfiguration>

　　GeneratorSqlmap.java 文件，配置好XML后，直接运行main函数就行

  1. public class GeneratorSqlmap {
  2.  
  3.     public void generator() throws Exception{
  4.  
  5.         List<String> warnings = new ArrayList<String>();
  6.         boolean overwrite = true;
  7.         //指定 逆向工程配置文件
  8.         File configFile = new File("generatorConfig.xml");
  9.         ConfigurationParser cp = new ConfigurationParser(warnings);
  10.         Configuration config = cp.parseConfiguration(configFile);
  11.         DefaultShellCallback callback = new DefaultShellCallback(overwrite);
  12.         MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config,
  13.                 callback, warnings);
  14.         myBatisGenerator.generate(null);
  15.  
  16.     }
  17.     public static void main(String[] args) throws Exception {
  18.         try {
  19.             GeneratorSqlmap generatorSqlmap = new GeneratorSqlmap();
  20.             generatorSqlmap.generator();
  21.         } catch (Exception e) {
  22.             e.printStackTrace();
  23.         }
  24.  
  25.     }
  26.  
  27. }

　　生成后总体的效果

　　

　　pojo.java

　　数据库字段如果是有大写字母，逆向工程生成的实体类中的属性全都是小写

　　数据库字段如果有下划线，逆向工程生成的实体类中下划线后面的字母会以大写开头

  1. public class TUser {
  2.     private Integer id;
  3.  
  4.     private String username;
  5.  
  6.     private String password;
  7.  
  8.     private String phone;
  9.  
  10.     private String eamil;
  11.  
  12.     private Integer credit;
  13.  
  14.     private String registerTime;
  15.  
  16.     private String loginTime;
  17.  
  18.     private String loginCity;
  19.  
  20.     private String logoutTime;
  21.  
  22.     private String chatId;
  23.  
  24.     private Integer isAuthentication;
  25.  
  26.     private Integer status;
  27.  
  28.     public Integer getId() {
  29.         return id;
  30.     }
  31.  
  32.     public void setId(Integer id) {
  33.         this.id = id;
  34.     }
  35.  
  36.     public String getUsername() {
  37.         return username;
  38.     }
  39.  
  40.     public void setUsername(String username) {
  41.         this.username = username == null ? null : username.trim();
  42.     }
  43.  
  44.     public String getPassword() {
  45.         return password;
  46.     }
  47.  
  48.     public void setPassword(String password) {
  49.         this.password = password == null ? null : password.trim();
  50.     }
  51.  
  52.     public String getPhone() {
  53.         return phone;
  54.     }
  55.  
  56.     public void setPhone(String phone) {
  57.         this.phone = phone == null ? null : phone.trim();
  58.     }
  59.  
  60.     public String getEamil() {
  61.         return eamil;
  62.     }
  63.  
  64.     public void setEamil(String eamil) {
  65.         this.eamil = eamil == null ? null : eamil.trim();
  66.     }
  67.  
  68.     public Integer getCredit() {
  69.         return credit;
  70.     }
  71.  
  72.     public void setCredit(Integer credit) {
  73.         this.credit = credit;
  74.     }
  75.  
  76.     public String getRegisterTime() {
  77.         return registerTime;
  78.     }
  79.  
  80.     public void setRegisterTime(String registerTime) {
  81.         this.registerTime = registerTime == null ? null : registerTime.trim();
  82.     }
  83.  
  84.     public String getLoginTime() {
  85.         return loginTime;
  86.     }
  87.  
  88.     public void setLoginTime(String loginTime) {
  89.         this.loginTime = loginTime == null ? null : loginTime.trim();
  90.     }
  91.  
  92.     public String getLoginCity() {
  93.         return loginCity;
  94.     }
  95.  
  96.     public void setLoginCity(String loginCity) {
  97.         this.loginCity = loginCity == null ? null : loginCity.trim();
  98.     }
  99.  
  100.     public String getLogoutTime() {
  101.         return logoutTime;
  102.     }
  103.  
  104.     public void setLogoutTime(String logoutTime) {
  105.         this.logoutTime = logoutTime == null ? null : logoutTime.trim();
  106.     }
  107.  
  108.     public String getChatId() {
  109.         return chatId;
  110.     }
  111.  
  112.     public void setChatId(String chatId) {
  113.         this.chatId = chatId == null ? null : chatId.trim();
  114.     }
  115.  
  116.     public Integer getIsAuthentication() {
  117.         return isAuthentication;
  118.     }
  119.  
  120.     public void setIsAuthentication(Integer isAuthentication) {
  121.         this.isAuthentication = isAuthentication;
  122.     }
  123.  
  124.     public Integer getStatus() {
  125.         return status;
  126.     }
  127.  
  128.     public void setStatus(Integer status) {
  129.         this.status = status;
  130.     }
  131. }

　　*Example.java

　　example类的使用方法请戳：http://www.cnblogs.com/liuzunli/articles/9257949.html

  1. public class TUserExample {
  2.     protected String orderByClause;
  3.  
  4.     protected boolean distinct;
  5.  
  6.     protected List<Criteria> oredCriteria;
  7.  
  8.     public TUserExample() {
  9.         oredCriteria = new ArrayList<Criteria>();
  10.     }
  11.  
  12.     public void setOrderByClause(String orderByClause) {
  13.         this.orderByClause = orderByClause;
  14.     }
  15.  
  16.     public String getOrderByClause() {
  17.         return orderByClause;
  18.     }
  19.  
  20.     public void setDistinct(boolean distinct) {
  21.         this.distinct = distinct;
  22.     }
  23.  
  24.     public boolean isDistinct() {
  25.         return distinct;
  26.     }
  27.  
  28.     public List<Criteria> getOredCriteria() {
  29.         return oredCriteria;
  30.     }
  31.  
  32.     public void or(Criteria criteria) {
  33.         oredCriteria.add(criteria);
  34.     }
  35.  
  36.     public Criteria or() {
  37.         Criteria criteria = createCriteriaInternal();
  38.         oredCriteria.add(criteria);
  39.         return criteria;
  40.     }
  41.  
  42.     public Criteria createCriteria() {
  43.         Criteria criteria = createCriteriaInternal();
  44.         if (oredCriteria.size() == 0) {
  45.             oredCriteria.add(criteria);
  46.         }
  47.         return criteria;
  48.     }
  49.  
  50.     protected Criteria createCriteriaInternal() {
  51.         Criteria criteria = new Criteria();
  52.         return criteria;
  53.     }
  54.  
  55.     public void clear() {
  56.         oredCriteria.clear();
  57.         orderByClause = null;
  58.         distinct = false;
  59.     }
  60.  
  61.     protected abstract static class GeneratedCriteria {
  62.         protected List<Criterion> criteria;
  63.  
  64.         protected GeneratedCriteria() {
  65.             super();
  66.             criteria = new ArrayList<Criterion>();
  67.         }
  68.  
  69.         public boolean isValid() {
  70.             return criteria.size() > 0;
  71.         }
  72.  
  73.         public List<Criterion> getAllCriteria() {
  74.             return criteria;
  75.         }
  76.  
  77.         public List<Criterion> getCriteria() {
  78.             return criteria;
  79.         }
  80.  
  81.         protected void addCriterion(String condition) {
  82.             if (condition == null) {
  83.                 throw new RuntimeException("Value for condition cannot be null");
  84.             }
  85.             criteria.add(new Criterion(condition));
  86.         }
  87.  
  88.         protected void addCriterion(String condition, Object value, String property) {
  89.             if (value == null) {
  90.                 throw new RuntimeException("Value for " + property + " cannot be null");
  91.             }
  92.             criteria.add(new Criterion(condition, value));
  93.         }
  94.  
  95.         protected void addCriterion(String condition, Object value1, Object value2, String property) {
  96.             if (value1 == null || value2 == null) {
  97.                 throw new RuntimeException("Between values for " + property + " cannot be null");
  98.             }
  99.             criteria.add(new Criterion(condition, value1, value2));
  100.         }
  101.  
  102.         public Criteria andIdIsNull() {
  103.             addCriterion("id is null");
  104.             return (Criteria) this;
  105.         }
  106.  
  107.         public Criteria andIdIsNotNull() {
  108.             addCriterion("id is not null");
  109.             return (Criteria) this;
  110.         }
  111.  
  112.         public Criteria andIdEqualTo(Integer value) {
  113.             addCriterion("id =", value, "id");
  114.             return (Criteria) this;
  115.         }
  116.  
  117.         public Criteria andIdNotEqualTo(Integer value) {
  118.             addCriterion("id <>", value, "id");
  119.             return (Criteria) this;
  120.         }
  121.  
  122.         public Criteria andIdGreaterThan(Integer value) {
  123.             addCriterion("id >", value, "id");
  124.             return (Criteria) this;
  125.         }
  126.  
  127.         public Criteria andIdGreaterThanOrEqualTo(Integer value) {
  128.             addCriterion("id >=", value, "id");
  129.             return (Criteria) this;
  130.         }
  131.  
  132.         public Criteria andIdLessThan(Integer value) {
  133.             addCriterion("id <", value, "id");
  134.             return (Criteria) this;
  135.         }
  136.  
  137.         public Criteria andIdLessThanOrEqualTo(Integer value) {
  138.             addCriterion("id <=", value, "id");
  139.             return (Criteria) this;
  140.         }
  141.  
  142.         public Criteria andIdIn(List<Integer> values) {
  143.             addCriterion("id in", values, "id");
  144.             return (Criteria) this;
  145.         }
  146.  
  147.         public Criteria andIdNotIn(List<Integer> values) {
  148.             addCriterion("id not in", values, "id");
  149.             return (Criteria) this;
  150.         }
  151.  
  152.         public Criteria andIdBetween(Integer value1, Integer value2) {
  153.             addCriterion("id between", value1, value2, "id");
  154.             return (Criteria) this;
  155.         }
  156.  
  157.         public Criteria andIdNotBetween(Integer value1, Integer value2) {
  158.             addCriterion("id not between", value1, value2, "id");
  159.             return (Criteria) this;
  160.         }
  161.  
  162.         public Criteria andUsernameIsNull() {
  163.             addCriterion("username is null");
  164.             return (Criteria) this;
  165.         }
  166.  
  167.         public Criteria andUsernameIsNotNull() {
  168.             addCriterion("username is not null");
  169.             return (Criteria) this;
  170.         }
  171.  
  172.         public Criteria andUsernameEqualTo(String value) {
  173.             addCriterion("username =", value, "username");
  174.             return (Criteria) this;
  175.         }
  176.  
  177.         public Criteria andUsernameNotEqualTo(String value) {
  178.             addCriterion("username <>", value, "username");
  179.             return (Criteria) this;
  180.         }
  181.  
  182.         public Criteria andUsernameGreaterThan(String value) {
  183.             addCriterion("username >", value, "username");
  184.             return (Criteria) this;
  185.         }
  186.  
  187.         public Criteria andUsernameGreaterThanOrEqualTo(String value) {
  188.             addCriterion("username >=", value, "username");
  189.             return (Criteria) this;
  190.         }
  191.  
  192.         public Criteria andUsernameLessThan(String value) {
  193.             addCriterion("username <", value, "username");
  194.             return (Criteria) this;
  195.         }
  196.  
  197.         public Criteria andUsernameLessThanOrEqualTo(String value) {
  198.             addCriterion("username <=", value, "username");
  199.             return (Criteria) this;
  200.         }
  201.  
  202.         public Criteria andUsernameLike(String value) {
  203.             addCriterion("username like", value, "username");
  204.             return (Criteria) this;
  205.         }
  206.  
  207.         public Criteria andUsernameNotLike(String value) {
  208.             addCriterion("username not like", value, "username");
  209.             return (Criteria) this;
  210.         }
  211.  
  212.         public Criteria andUsernameIn(List<String> values) {
  213.             addCriterion("username in", values, "username");
  214.             return (Criteria) this;
  215.         }
  216.  
  217.         public Criteria andUsernameNotIn(List<String> values) {
  218.             addCriterion("username not in", values, "username");
  219.             return (Criteria) this;
  220.         }
  221.  
  222.         public Criteria andUsernameBetween(String value1, String value2) {
  223.             addCriterion("username between", value1, value2, "username");
  224.             return (Criteria) this;
  225.         }
  226.  
  227.         public Criteria andUsernameNotBetween(String value1, String value2) {
  228.             addCriterion("username not between", value1, value2, "username");
  229.             return (Criteria) this;
  230.         }
  231.  
  232.         public Criteria andPasswordIsNull() {
  233.             addCriterion("password is null");
  234.             return (Criteria) this;
  235.         }
  236.  
  237.         public Criteria andPasswordIsNotNull() {
  238.             addCriterion("password is not null");
  239.             return (Criteria) this;
  240.         }
  241.  
  242.         public Criteria andPasswordEqualTo(String value) {
  243.             addCriterion("password =", value, "password");
  244.             return (Criteria) this;
  245.         }
  246.  
  247.         public Criteria andPasswordNotEqualTo(String value) {
  248.             addCriterion("password <>", value, "password");
  249.             return (Criteria) this;
  250.         }
  251.  
  252.         public Criteria andPasswordGreaterThan(String value) {
  253.             addCriterion("password >", value, "password");
  254.             return (Criteria) this;
  255.         }
  256.  
  257.         public Criteria andPasswordGreaterThanOrEqualTo(String value) {
  258.             addCriterion("password >=", value, "password");
  259.             return (Criteria) this;
  260.         }
  261.  
  262.         public Criteria andPasswordLessThan(String value) {
  263.             addCriterion("password <", value, "password");
  264.             return (Criteria) this;
  265.         }
  266.  
  267.         public Criteria andPasswordLessThanOrEqualTo(String value) {
  268.             addCriterion("password <=", value, "password");
  269.             return (Criteria) this;
  270.         }
  271.  
  272.         public Criteria andPasswordLike(String value) {
  273.             addCriterion("password like", value, "password");
  274.             return (Criteria) this;
  275.         }
  276.  
  277.         public Criteria andPasswordNotLike(String value) {
  278.             addCriterion("password not like", value, "password");
  279.             return (Criteria) this;
  280.         }
  281.  
  282.         public Criteria andPasswordIn(List<String> values) {
  283.             addCriterion("password in", values, "password");
  284.             return (Criteria) this;
  285.         }
  286.  
  287.         public Criteria andPasswordNotIn(List<String> values) {
  288.             addCriterion("password not in", values, "password");
  289.             return (Criteria) this;
  290.         }
  291.  
  292.         public Criteria andPasswordBetween(String value1, String value2) {
  293.             addCriterion("password between", value1, value2, "password");
  294.             return (Criteria) this;
  295.         }
  296.  
  297.         public Criteria andPasswordNotBetween(String value1, String value2) {
  298.             addCriterion("password not between", value1, value2, "password");
  299.             return (Criteria) this;
  300.         }
  301.  
  302.         public Criteria andPhoneIsNull() {
  303.             addCriterion("phone is null");
  304.             return (Criteria) this;
  305.         }
  306.  
  307.         public Criteria andPhoneIsNotNull() {
  308.             addCriterion("phone is not null");
  309.             return (Criteria) this;
  310.         }
  311.  
  312.         public Criteria andPhoneEqualTo(String value) {
  313.             addCriterion("phone =", value, "phone");
  314.             return (Criteria) this;
  315.         }
  316.  
  317.         public Criteria andPhoneNotEqualTo(String value) {
  318.             addCriterion("phone <>", value, "phone");
  319.             return (Criteria) this;
  320.         }
  321.  
  322.         public Criteria andPhoneGreaterThan(String value) {
  323.             addCriterion("phone >", value, "phone");
  324.             return (Criteria) this;
  325.         }
  326.  
  327.         public Criteria andPhoneGreaterThanOrEqualTo(String value) {
  328.             addCriterion("phone >=", value, "phone");
  329.             return (Criteria) this;
  330.         }
  331.  
  332.         public Criteria andPhoneLessThan(String value) {
  333.             addCriterion("phone <", value, "phone");
  334.             return (Criteria) this;
  335.         }
  336.  
  337.         public Criteria andPhoneLessThanOrEqualTo(String value) {
  338.             addCriterion("phone <=", value, "phone");
  339.             return (Criteria) this;
  340.         }
  341.  
  342.         public Criteria andPhoneLike(String value) {
  343.             addCriterion("phone like", value, "phone");
  344.             return (Criteria) this;
  345.         }
  346.  
  347.         public Criteria andPhoneNotLike(String value) {
  348.             addCriterion("phone not like", value, "phone");
  349.             return (Criteria) this;
  350.         }
  351.  
  352.         public Criteria andPhoneIn(List<String> values) {
  353.             addCriterion("phone in", values, "phone");
  354.             return (Criteria) this;
  355.         }
  356.  
  357.         public Criteria andPhoneNotIn(List<String> values) {
  358.             addCriterion("phone not in", values, "phone");
  359.             return (Criteria) this;
  360.         }
  361.  
  362.         public Criteria andPhoneBetween(String value1, String value2) {
  363.             addCriterion("phone between", value1, value2, "phone");
  364.             return (Criteria) this;
  365.         }
  366.  
  367.         public Criteria andPhoneNotBetween(String value1, String value2) {
  368.             addCriterion("phone not between", value1, value2, "phone");
  369.             return (Criteria) this;
  370.         }
  371.  
  372.         public Criteria andEamilIsNull() {
  373.             addCriterion("eamil is null");
  374.             return (Criteria) this;
  375.         }
  376.  
  377.         public Criteria andEamilIsNotNull() {
  378.             addCriterion("eamil is not null");
  379.             return (Criteria) this;
  380.         }
  381.  
  382.         public Criteria andEamilEqualTo(String value) {
  383.             addCriterion("eamil =", value, "eamil");
  384.             return (Criteria) this;
  385.         }
  386.  
  387.         public Criteria andEamilNotEqualTo(String value) {
  388.             addCriterion("eamil <>", value, "eamil");
  389.             return (Criteria) this;
  390.         }
  391.  
  392.         public Criteria andEamilGreaterThan(String value) {
  393.             addCriterion("eamil >", value, "eamil");
  394.             return (Criteria) this;
  395.         }
  396.  
  397.         public Criteria andEamilGreaterThanOrEqualTo(String value) {
  398.             addCriterion("eamil >=", value, "eamil");
  399.             return (Criteria) this;
  400.         }
  401.  
  402.         public Criteria andEamilLessThan(String value) {
  403.             addCriterion("eamil <", value, "eamil");
  404.             return (Criteria) this;
  405.         }
  406.  
  407.         public Criteria andEamilLessThanOrEqualTo(String value) {
  408.             addCriterion("eamil <=", value, "eamil");
  409.             return (Criteria) this;
  410.         }
  411.  
  412.         public Criteria andEamilLike(String value) {
  413.             addCriterion("eamil like", value, "eamil");
  414.             return (Criteria) this;
  415.         }
  416.  
  417.         public Criteria andEamilNotLike(String value) {
  418.             addCriterion("eamil not like", value, "eamil");
  419.             return (Criteria) this;
  420.         }
  421.  
  422.         public Criteria andEamilIn(List<String> values) {
  423.             addCriterion("eamil in", values, "eamil");
  424.             return (Criteria) this;
  425.         }
  426.  
  427.         public Criteria andEamilNotIn(List<String> values) {
  428.             addCriterion("eamil not in", values, "eamil");
  429.             return (Criteria) this;
  430.         }
  431.  
  432.         public Criteria andEamilBetween(String value1, String value2) {
  433.             addCriterion("eamil between", value1, value2, "eamil");
  434.             return (Criteria) this;
  435.         }
  436.  
  437.         public Criteria andEamilNotBetween(String value1, String value2) {
  438.             addCriterion("eamil not between", value1, value2, "eamil");
  439.             return (Criteria) this;
  440.         }
  441.  
  442.         public Criteria andCreditIsNull() {
  443.             addCriterion("credit is null");
  444.             return (Criteria) this;
  445.         }
  446.  
  447.         public Criteria andCreditIsNotNull() {
  448.             addCriterion("credit is not null");
  449.             return (Criteria) this;
  450.         }
  451.  
  452.         public Criteria andCreditEqualTo(Integer value) {
  453.             addCriterion("credit =", value, "credit");
  454.             return (Criteria) this;
  455.         }
  456.  
  457.         public Criteria andCreditNotEqualTo(Integer value) {
  458.             addCriterion("credit <>", value, "credit");
  459.             return (Criteria) this;
  460.         }
  461.  
  462.         public Criteria andCreditGreaterThan(Integer value) {
  463.             addCriterion("credit >", value, "credit");
  464.             return (Criteria) this;
  465.         }
  466.  
  467.         public Criteria andCreditGreaterThanOrEqualTo(Integer value) {
  468.             addCriterion("credit >=", value, "credit");
  469.             return (Criteria) this;
  470.         }
  471.  
  472.         public Criteria andCreditLessThan(Integer value) {
  473.             addCriterion("credit <", value, "credit");
  474.             return (Criteria) this;
  475.         }
  476.  
  477.         public Criteria andCreditLessThanOrEqualTo(Integer value) {
  478.             addCriterion("credit <=", value, "credit");
  479.             return (Criteria) this;
  480.         }
  481.  
  482.         public Criteria andCreditIn(List<Integer> values) {
  483.             addCriterion("credit in", values, "credit");
  484.             return (Criteria) this;
  485.         }
  486.  
  487.         public Criteria andCreditNotIn(List<Integer> values) {
  488.             addCriterion("credit not in", values, "credit");
  489.             return (Criteria) this;
  490.         }
  491.  
  492.         public Criteria andCreditBetween(Integer value1, Integer value2) {
  493.             addCriterion("credit between", value1, value2, "credit");
  494.             return (Criteria) this;
  495.         }
  496.  
  497.         public Criteria andCreditNotBetween(Integer value1, Integer value2) {
  498.             addCriterion("credit not between", value1, value2, "credit");
  499.             return (Criteria) this;
  500.         }
  501.  
  502.         public Criteria andRegisterTimeIsNull() {
  503.             addCriterion("register_time is null");
  504.             return (Criteria) this;
  505.         }
  506.  
  507.         public Criteria andRegisterTimeIsNotNull() {
  508.             addCriterion("register_time is not null");
  509.             return (Criteria) this;
  510.         }
  511.  
  512.         public Criteria andRegisterTimeEqualTo(String value) {
  513.             addCriterion("register_time =", value, "registerTime");
  514.             return (Criteria) this;
  515.         }
  516.  
  517.         public Criteria andRegisterTimeNotEqualTo(String value) {
  518.             addCriterion("register_time <>", value, "registerTime");
  519.             return (Criteria) this;
  520.         }
  521.  
  522.         public Criteria andRegisterTimeGreaterThan(String value) {
  523.             addCriterion("register_time >", value, "registerTime");
  524.             return (Criteria) this;
  525.         }
  526.  
  527.         public Criteria andRegisterTimeGreaterThanOrEqualTo(String value) {
  528.             addCriterion("register_time >=", value, "registerTime");
  529.             return (Criteria) this;
  530.         }
  531.  
  532.         public Criteria andRegisterTimeLessThan(String value) {
  533.             addCriterion("register_time <", value, "registerTime");
  534.             return (Criteria) this;
  535.         }
  536.  
  537.         public Criteria andRegisterTimeLessThanOrEqualTo(String value) {
  538.             addCriterion("register_time <=", value, "registerTime");
  539.             return (Criteria) this;
  540.         }
  541.  
  542.         public Criteria andRegisterTimeLike(String value) {
  543.             addCriterion("register_time like", value, "registerTime");
  544.             return (Criteria) this;
  545.         }
  546.  
  547.         public Criteria andRegisterTimeNotLike(String value) {
  548.             addCriterion("register_time not like", value, "registerTime");
  549.             return (Criteria) this;
  550.         }
  551.  
  552.         public Criteria andRegisterTimeIn(List<String> values) {
  553.             addCriterion("register_time in", values, "registerTime");
  554.             return (Criteria) this;
  555.         }
  556.  
  557.         public Criteria andRegisterTimeNotIn(List<String> values) {
  558.             addCriterion("register_time not in", values, "registerTime");
  559.             return (Criteria) this;
  560.         }
  561.  
  562.         public Criteria andRegisterTimeBetween(String value1, String value2) {
  563.             addCriterion("register_time between", value1, value2, "registerTime");
  564.             return (Criteria) this;
  565.         }
  566.  
  567.         public Criteria andRegisterTimeNotBetween(String value1, String value2) {
  568.             addCriterion("register_time not between", value1, value2, "registerTime");
  569.             return (Criteria) this;
  570.         }
  571.  
  572.         public Criteria andLoginTimeIsNull() {
  573.             addCriterion("login_time is null");
  574.             return (Criteria) this;
  575.         }
  576.  
  577.         public Criteria andLoginTimeIsNotNull() {
  578.             addCriterion("login_time is not null");
  579.             return (Criteria) this;
  580.         }
  581.  
  582.         public Criteria andLoginTimeEqualTo(String value) {
  583.             addCriterion("login_time =", value, "loginTime");
  584.             return (Criteria) this;
  585.         }
  586.  
  587.         public Criteria andLoginTimeNotEqualTo(String value) {
  588.             addCriterion("login_time <>", value, "loginTime");
  589.             return (Criteria) this;
  590.         }
  591.  
  592.         public Criteria andLoginTimeGreaterThan(String value) {
  593.             addCriterion("login_time >", value, "loginTime");
  594.             return (Criteria) this;
  595.         }
  596.  
  597.         public Criteria andLoginTimeGreaterThanOrEqualTo(String value) {
  598.             addCriterion("login_time >=", value, "loginTime");
  599.             return (Criteria) this;
  600.         }
  601.  
  602.         public Criteria andLoginTimeLessThan(String value) {
  603.             addCriterion("login_time <", value, "loginTime");
  604.             return (Criteria) this;
  605.         }
  606.  
  607.         public Criteria andLoginTimeLessThanOrEqualTo(String value) {
  608.             addCriterion("login_time <=", value, "loginTime");
  609.             return (Criteria) this;
  610.         }
  611.  
  612.         public Criteria andLoginTimeLike(String value) {
  613.             addCriterion("login_time like", value, "loginTime");
  614.             return (Criteria) this;
  615.         }
  616.  
  617.         public Criteria andLoginTimeNotLike(String value) {
  618.             addCriterion("login_time not like", value, "loginTime");
  619.             return (Criteria) this;
  620.         }
  621.  
  622.         public Criteria andLoginTimeIn(List<String> values) {
  623.             addCriterion("login_time in", values, "loginTime");
  624.             return (Criteria) this;
  625.         }
  626.  
  627.         public Criteria andLoginTimeNotIn(List<String> values) {
  628.             addCriterion("login_time not in", values, "loginTime");
  629.             return (Criteria) this;
  630.         }
  631.  
  632.         public Criteria andLoginTimeBetween(String value1, String value2) {
  633.             addCriterion("login_time between", value1, value2, "loginTime");
  634.             return (Criteria) this;
  635.         }
  636.  
  637.         public Criteria andLoginTimeNotBetween(String value1, String value2) {
  638.             addCriterion("login_time not between", value1, value2, "loginTime");
  639.             return (Criteria) this;
  640.         }
  641.  
  642.         public Criteria andLoginCityIsNull() {
  643.             addCriterion("login_city is null");
  644.             return (Criteria) this;
  645.         }
  646.  
  647.         public Criteria andLoginCityIsNotNull() {
  648.             addCriterion("login_city is not null");
  649.             return (Criteria) this;
  650.         }
  651.  
  652.         public Criteria andLoginCityEqualTo(String value) {
  653.             addCriterion("login_city =", value, "loginCity");
  654.             return (Criteria) this;
  655.         }
  656.  
  657.         public Criteria andLoginCityNotEqualTo(String value) {
  658.             addCriterion("login_city <>", value, "loginCity");
  659.             return (Criteria) this;
  660.         }
  661.  
  662.         public Criteria andLoginCityGreaterThan(String value) {
  663.             addCriterion("login_city >", value, "loginCity");
  664.             return (Criteria) this;
  665.         }
  666.  
  667.         public Criteria andLoginCityGreaterThanOrEqualTo(String value) {
  668.             addCriterion("login_city >=", value, "loginCity");
  669.             return (Criteria) this;
  670.         }
  671.  
  672.         public Criteria andLoginCityLessThan(String value) {
  673.             addCriterion("login_city <", value, "loginCity");
  674.             return (Criteria) this;
  675.         }
  676.  
  677.         public Criteria andLoginCityLessThanOrEqualTo(String value) {
  678.             addCriterion("login_city <=", value, "loginCity");
  679.             return (Criteria) this;
  680.         }
  681.  
  682.         public Criteria andLoginCityLike(String value) {
  683.             addCriterion("login_city like", value, "loginCity");
  684.             return (Criteria) this;
  685.         }
  686.  
  687.         public Criteria andLoginCityNotLike(String value) {
  688.             addCriterion("login_city not like", value, "loginCity");
  689.             return (Criteria) this;
  690.         }
  691.  
  692.         public Criteria andLoginCityIn(List<String> values) {
  693.             addCriterion("login_city in", values, "loginCity");
  694.             return (Criteria) this;
  695.         }
  696.  
  697.         public Criteria andLoginCityNotIn(List<String> values) {
  698.             addCriterion("login_city not in", values, "loginCity");
  699.             return (Criteria) this;
  700.         }
  701.  
  702.         public Criteria andLoginCityBetween(String value1, String value2) {
  703.             addCriterion("login_city between", value1, value2, "loginCity");
  704.             return (Criteria) this;
  705.         }
  706.  
  707.         public Criteria andLoginCityNotBetween(String value1, String value2) {
  708.             addCriterion("login_city not between", value1, value2, "loginCity");
  709.             return (Criteria) this;
  710.         }
  711.  
  712.         public Criteria andLogoutTimeIsNull() {
  713.             addCriterion("logout_time is null");
  714.             return (Criteria) this;
  715.         }
  716.  
  717.         public Criteria andLogoutTimeIsNotNull() {
  718.             addCriterion("logout_time is not null");
  719.             return (Criteria) this;
  720.         }
  721.  
  722.         public Criteria andLogoutTimeEqualTo(String value) {
  723.             addCriterion("logout_time =", value, "logoutTime");
  724.             return (Criteria) this;
  725.         }
  726.  
  727.         public Criteria andLogoutTimeNotEqualTo(String value) {
  728.             addCriterion("logout_time <>", value, "logoutTime");
  729.             return (Criteria) this;
  730.         }
  731.  
  732.         public Criteria andLogoutTimeGreaterThan(String value) {
  733.             addCriterion("logout_time >", value, "logoutTime");
  734.             return (Criteria) this;
  735.         }
  736.  
  737.         public Criteria andLogoutTimeGreaterThanOrEqualTo(String value) {
  738.             addCriterion("logout_time >=", value, "logoutTime");
  739.             return (Criteria) this;
  740.         }
  741.  
  742.         public Criteria andLogoutTimeLessThan(String value) {
  743.             addCriterion("logout_time <", value, "logoutTime");
  744.             return (Criteria) this;
  745.         }
  746.  
  747.         public Criteria andLogoutTimeLessThanOrEqualTo(String value) {
  748.             addCriterion("logout_time <=", value, "logoutTime");
  749.             return (Criteria) this;
  750.         }
  751.  
  752.         public Criteria andLogoutTimeLike(String value) {
  753.             addCriterion("logout_time like", value, "logoutTime");
  754.             return (Criteria) this;
  755.         }
  756.  
  757.         public Criteria andLogoutTimeNotLike(String value) {
  758.             addCriterion("logout_time not like", value, "logoutTime");
  759.             return (Criteria) this;
  760.         }
  761.  
  762.         public Criteria andLogoutTimeIn(List<String> values) {
  763.             addCriterion("logout_time in", values, "logoutTime");
  764.             return (Criteria) this;
  765.         }
  766.  
  767.         public Criteria andLogoutTimeNotIn(List<String> values) {
  768.             addCriterion("logout_time not in", values, "logoutTime");
  769.             return (Criteria) this;
  770.         }
  771.  
  772.         public Criteria andLogoutTimeBetween(String value1, String value2) {
  773.             addCriterion("logout_time between", value1, value2, "logoutTime");
  774.             return (Criteria) this;
  775.         }
  776.  
  777.         public Criteria andLogoutTimeNotBetween(String value1, String value2) {
  778.             addCriterion("logout_time not between", value1, value2, "logoutTime");
  779.             return (Criteria) this;
  780.         }
  781.  
  782.         public Criteria andChatIdIsNull() {
  783.             addCriterion("chat_id is null");
  784.             return (Criteria) this;
  785.         }
  786.  
  787.         public Criteria andChatIdIsNotNull() {
  788.             addCriterion("chat_id is not null");
  789.             return (Criteria) this;
  790.         }
  791.  
  792.         public Criteria andChatIdEqualTo(String value) {
  793.             addCriterion("chat_id =", value, "chatId");
  794.             return (Criteria) this;
  795.         }
  796.  
  797.         public Criteria andChatIdNotEqualTo(String value) {
  798.             addCriterion("chat_id <>", value, "chatId");
  799.             return (Criteria) this;
  800.         }
  801.  
  802.         public Criteria andChatIdGreaterThan(String value) {
  803.             addCriterion("chat_id >", value, "chatId");
  804.             return (Criteria) this;
  805.         }
  806.  
  807.         public Criteria andChatIdGreaterThanOrEqualTo(String value) {
  808.             addCriterion("chat_id >=", value, "chatId");
  809.             return (Criteria) this;
  810.         }
  811.  
  812.         public Criteria andChatIdLessThan(String value) {
  813.             addCriterion("chat_id <", value, "chatId");
  814.             return (Criteria) this;
  815.         }
  816.  
  817.         public Criteria andChatIdLessThanOrEqualTo(String value) {
  818.             addCriterion("chat_id <=", value, "chatId");
  819.             return (Criteria) this;
  820.         }
  821.  
  822.         public Criteria andChatIdLike(String value) {
  823.             addCriterion("chat_id like", value, "chatId");
  824.             return (Criteria) this;
  825.         }
  826.  
  827.         public Criteria andChatIdNotLike(String value) {
  828.             addCriterion("chat_id not like", value, "chatId");
  829.             return (Criteria) this;
  830.         }
  831.  
  832.         public Criteria andChatIdIn(List<String> values) {
  833.             addCriterion("chat_id in", values, "chatId");
  834.             return (Criteria) this;
  835.         }
  836.  
  837.         public Criteria andChatIdNotIn(List<String> values) {
  838.             addCriterion("chat_id not in", values, "chatId");
  839.             return (Criteria) this;
  840.         }
  841.  
  842.         public Criteria andChatIdBetween(String value1, String value2) {
  843.             addCriterion("chat_id between", value1, value2, "chatId");
  844.             return (Criteria) this;
  845.         }
  846.  
  847.         public Criteria andChatIdNotBetween(String value1, String value2) {
  848.             addCriterion("chat_id not between", value1, value2, "chatId");
  849.             return (Criteria) this;
  850.         }
  851.  
  852.         public Criteria andIsAuthenticationIsNull() {
  853.             addCriterion("is_authentication is null");
  854.             return (Criteria) this;
  855.         }
  856.  
  857.         public Criteria andIsAuthenticationIsNotNull() {
  858.             addCriterion("is_authentication is not null");
  859.             return (Criteria) this;
  860.         }
  861.  
  862.         public Criteria andIsAuthenticationEqualTo(Integer value) {
  863.             addCriterion("is_authentication =", value, "isAuthentication");
  864.             return (Criteria) this;
  865.         }
  866.  
  867.         public Criteria andIsAuthenticationNotEqualTo(Integer value) {
  868.             addCriterion("is_authentication <>", value, "isAuthentication");
  869.             return (Criteria) this;
  870.         }
  871.  
  872.         public Criteria andIsAuthenticationGreaterThan(Integer value) {
  873.             addCriterion("is_authentication >", value, "isAuthentication");
  874.             return (Criteria) this;
  875.         }
  876.  
  877.         public Criteria andIsAuthenticationGreaterThanOrEqualTo(Integer value) {
  878.             addCriterion("is_authentication >=", value, "isAuthentication");
  879.             return (Criteria) this;
  880.         }
  881.  
  882.         public Criteria andIsAuthenticationLessThan(Integer value) {
  883.             addCriterion("is_authentication <", value, "isAuthentication");
  884.             return (Criteria) this;
  885.         }
  886.  
  887.         public Criteria andIsAuthenticationLessThanOrEqualTo(Integer value) {
  888.             addCriterion("is_authentication <=", value, "isAuthentication");
  889.             return (Criteria) this;
  890.         }
  891.  
  892.         public Criteria andIsAuthenticationIn(List<Integer> values) {
  893.             addCriterion("is_authentication in", values, "isAuthentication");
  894.             return (Criteria) this;
  895.         }
  896.  
  897.         public Criteria andIsAuthenticationNotIn(List<Integer> values) {
  898.             addCriterion("is_authentication not in", values, "isAuthentication");
  899.             return (Criteria) this;
  900.         }
  901.  
  902.         public Criteria andIsAuthenticationBetween(Integer value1, Integer value2) {
  903.             addCriterion("is_authentication between", value1, value2, "isAuthentication");
  904.             return (Criteria) this;
  905.         }
  906.  
  907.         public Criteria andIsAuthenticationNotBetween(Integer value1, Integer value2) {
  908.             addCriterion("is_authentication not between", value1, value2, "isAuthentication");
  909.             return (Criteria) this;
  910.         }
  911.  
  912.         public Criteria andStatusIsNull() {
  913.             addCriterion("status is null");
  914.             return (Criteria) this;
  915.         }
  916.  
  917.         public Criteria andStatusIsNotNull() {
  918.             addCriterion("status is not null");
  919.             return (Criteria) this;
  920.         }
  921.  
  922.         public Criteria andStatusEqualTo(Integer value) {
  923.             addCriterion("status =", value, "status");
  924.             return (Criteria) this;
  925.         }
  926.  
  927.         public Criteria andStatusNotEqualTo(Integer value) {
  928.             addCriterion("status <>", value, "status");
  929.             return (Criteria) this;
  930.         }
  931.  
  932.         public Criteria andStatusGreaterThan(Integer value) {
  933.             addCriterion("status >", value, "status");
  934.             return (Criteria) this;
  935.         }
  936.  
  937.         public Criteria andStatusGreaterThanOrEqualTo(Integer value) {
  938.             addCriterion("status >=", value, "status");
  939.             return (Criteria) this;
  940.         }
  941.  
  942.         public Criteria andStatusLessThan(Integer value) {
  943.             addCriterion("status <", value, "status");
  944.             return (Criteria) this;
  945.         }
  946.  
  947.         public Criteria andStatusLessThanOrEqualTo(Integer value) {
  948.             addCriterion("status <=", value, "status");
  949.             return (Criteria) this;
  950.         }
  951.  
  952.         public Criteria andStatusIn(List<Integer> values) {
  953.             addCriterion("status in", values, "status");
  954.             return (Criteria) this;
  955.         }
  956.  
  957.         public Criteria andStatusNotIn(List<Integer> values) {
  958.             addCriterion("status not in", values, "status");
  959.             return (Criteria) this;
  960.         }
  961.  
  962.         public Criteria andStatusBetween(Integer value1, Integer value2) {
  963.             addCriterion("status between", value1, value2, "status");
  964.             return (Criteria) this;
  965.         }
  966.  
  967.         public Criteria andStatusNotBetween(Integer value1, Integer value2) {
  968.             addCriterion("status not between", value1, value2, "status");
  969.             return (Criteria) this;
  970.         }
  971.     }
  972.  
  973.     public static class Criteria extends GeneratedCriteria {
  974.  
  975.         protected Criteria() {
  976.             super();
  977.         }
  978.     }
  979.  
  980.     public static class Criterion {
  981.         private String condition;
  982.  
  983.         private Object value;
  984.  
  985.         private Object secondValue;
  986.  
  987.         private boolean noValue;
  988.  
  989.         private boolean singleValue;
  990.  
  991.         private boolean betweenValue;
  992.  
  993.         private boolean listValue;
  994.  
  995.         private String typeHandler;
  996.  
  997.         public String getCondition() {
  998.             return condition;
  999.         }
  1000.  
  1001.         public Object getValue() {
  1002.             return value;
  1003.         }
  1004.  
  1005.         public Object getSecondValue() {
  1006.             return secondValue;
  1007.         }
  1008.  
  1009.         public boolean isNoValue() {
  1010.             return noValue;
  1011.         }
  1012.  
  1013.         public boolean isSingleValue() {
  1014.             return singleValue;
  1015.         }
  1016.  
  1017.         public boolean isBetweenValue() {
  1018.             return betweenValue;
  1019.         }
  1020.  
  1021.         public boolean isListValue() {
  1022.             return listValue;
  1023.         }
  1024.  
  1025.         public String getTypeHandler() {
  1026.             return typeHandler;
  1027.         }
  1028.  
  1029.         protected Criterion(String condition) {
  1030.             super();
  1031.             this.condition = condition;
  1032.             this.typeHandler = null;
  1033.             this.noValue = true;
  1034.         }
  1035.  
  1036.         protected Criterion(String condition, Object value, String typeHandler) {
  1037.             super();
  1038.             this.condition = condition;
  1039.             this.value = value;
  1040.             this.typeHandler = typeHandler;
  1041.             if (value instanceof List<?>) {
  1042.                 this.listValue = true;
  1043.             } else {
  1044.                 this.singleValue = true;
  1045.             }
  1046.         }
  1047.  
  1048.         protected Criterion(String condition, Object value) {
  1049.             this(condition, value, null);
  1050.         }
  1051.  
  1052.         protected Criterion(String condition, Object value, Object secondValue, String typeHandler) {
  1053.             super();
  1054.             this.condition = condition;
  1055.             this.value = value;
  1056.             this.secondValue = secondValue;
  1057.             this.typeHandler = typeHandler;
  1058.             this.betweenValue = true;
  1059.         }
  1060.  
  1061.         protected Criterion(String condition, Object value, Object secondValue) {
  1062.             this(condition, value, secondValue, null);
  1063.         }
  1064.     }
  1065. }

　　*mapper.java

public interface TUserMapper {

    int countByExample(TUserExample example);

    int deleteByExample(TUserExample example);

    int deleteByPrimaryKey(Integer id);

    int insert(TUser record);

    int insertSelective(TUser record);

    List<TUser> selectByExample(TUserExample example);

    TUser selectByPrimaryKey(Integer id);

    int updateByExampleSelective(@Param("record") TUser record, @Param("example") TUserExample example);

    int updateByExample(@Param("record") TUser record, @Param("example") TUserExample example);

    int updateByPrimaryKeySelective(TUser record);

    int updateByPrimaryKey(TUser record);

}

　　*Mapper.xml

<?xml version="1.0" encoding="UTF-8" ?>

<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >

<mapper namespace="cn.gx.hzu.cpsh.common.mapper.TUserMapper" >

  <resultMap id="BaseResultMap" type="cn.gx.hzu.cpsh.common.pojo.TUser" >

    <id column="id" property="id" jdbcType="INTEGER" />

    <result column="username" property="username" jdbcType="VARCHAR" />

    <result column="password" property="password" jdbcType="VARCHAR" />

    <result column="phone" property="phone" jdbcType="VARCHAR" />

    <result column="eamil" property="eamil" jdbcType="VARCHAR" />

    <result column="credit" property="credit" jdbcType="INTEGER" />

    <result column="register_time" property="registerTime" jdbcType="VARCHAR" />

    <result column="login_time" property="loginTime" jdbcType="VARCHAR" />

    <result column="login_city" property="loginCity" jdbcType="VARCHAR" />

    <result column="logout_time" property="logoutTime" jdbcType="VARCHAR" />

    <result column="chat_id" property="chatId" jdbcType="VARCHAR" />

    <result column="is_authentication" property="isAuthentication" jdbcType="INTEGER" />

    <result column="status" property="status" jdbcType="INTEGER" />

  </resultMap>

  <sql id="Example_Where_Clause" >

    <where >

      <foreach collection="oredCriteria" item="criteria" separator="or" >

        <if test="criteria.valid" >

          <trim prefix="(" suffix=")" prefixOverrides="and" >

            <foreach collection="criteria.criteria" item="criterion" >

              <choose >

                <when test="criterion.noValue" >

                  and ${criterion.condition}

                </when>

                <when test="criterion.singleValue" >

                  and ${criterion.condition} #{criterion.value}

                </when>

                <when test="criterion.betweenValue" >

                  and ${criterion.condition} #{criterion.value} and #{criterion.secondValue}

                </when>

                <when test="criterion.listValue" >

                  and ${criterion.condition}

                  <foreach collection="criterion.value" item="listItem" open="(" close=")" separator="," >

                    #{listItem}

                  </foreach>

                </when>

              </choose>

            </foreach>

          </trim>

        </if>

      </foreach>

    </where>

  </sql>

  <sql id="Update_By_Example_Where_Clause" >

    <where >

      <foreach collection="example.oredCriteria" item="criteria" separator="or" >

        <if test="criteria.valid" >

          <trim prefix="(" suffix=")" prefixOverrides="and" >

            <foreach collection="criteria.criteria" item="criterion" >

              <choose >

                <when test="criterion.noValue" >

                  and ${criterion.condition}

                </when>

                <when test="criterion.singleValue" >

                  and ${criterion.condition} #{criterion.value}

                </when>

                <when test="criterion.betweenValue" >

                  and ${criterion.condition} #{criterion.value} and #{criterion.secondValue}

                </when>

                <when test="criterion.listValue" >

                  and ${criterion.condition}

                  <foreach collection="criterion.value" item="listItem" open="(" close=")" separator="," >

                    #{listItem}

                  </foreach>

                </when>

              </choose>

            </foreach>

          </trim>

        </if>

      </foreach>

    </where>

  </sql>

  <sql id="Base_Column_List" >

    id, username, password, phone, eamil, credit, register_time, login_time, login_city,

    logout_time, chat_id, is_authentication, status

  </sql>

  <select id="selectByExample" resultMap="BaseResultMap" parameterType="cn.gx.hzu.cpsh.common.pojo.TUserExample" >

    select

    <if test="distinct" >

      distinct

    </if>

    <include refid="Base_Column_List" />

    from t_user

    <if test="_parameter != null" >

      <include refid="Example_Where_Clause" />

    </if>

    <if test="orderByClause != null" >

      order by ${orderByClause}

    </if>

  </select>

  <select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Integer" >

    select

    <include refid="Base_Column_List" />

    from t_user

    where id = #{id,jdbcType=INTEGER}

  </select>

  <delete id="deleteByPrimaryKey" parameterType="java.lang.Integer" >

    delete from t_user

    where id = #{id,jdbcType=INTEGER}

  </delete>

  <delete id="deleteByExample" parameterType="cn.gx.hzu.cpsh.common.pojo.TUserExample" >

    delete from t_user

    <if test="_parameter != null" >

      <include refid="Example_Where_Clause" />

    </if>

  </delete>

  <insert id="insert" parameterType="cn.gx.hzu.cpsh.common.pojo.TUser" >

    insert into t_user (id, username, password,

      phone, eamil, credit,

      register_time, login_time, login_city,

      logout_time, chat_id, is_authentication,

      status)

    values (#{id,jdbcType=INTEGER}, #{username,jdbcType=VARCHAR}, #{password,jdbcType=VARCHAR},

      #{phone,jdbcType=VARCHAR}, #{eamil,jdbcType=VARCHAR}, #{credit,jdbcType=INTEGER},

      #{registerTime,jdbcType=VARCHAR}, #{loginTime,jdbcType=VARCHAR}, #{loginCity,jdbcType=VARCHAR},

      #{logoutTime,jdbcType=VARCHAR}, #{chatId,jdbcType=VARCHAR}, #{isAuthentication,jdbcType=INTEGER},

      #{status,jdbcType=INTEGER})

  </insert>

  <insert id="insertSelective" parameterType="cn.gx.hzu.cpsh.common.pojo.TUser" >

    insert into t_user

    <trim prefix="(" suffix=")" suffixOverrides="," >

      <if test="id != null" >

        id,

      </if>

      <if test="username != null" >

        username,

      </if>

      <if test="password != null" >

        password,

      </if>

      <if test="phone != null" >

        phone,

      </if>

      <if test="eamil != null" >

        eamil,

      </if>

      <if test="credit != null" >

        credit,

      </if>

      <if test="registerTime != null" >

        register_time,

      </if>

      <if test="loginTime != null" >

        login_time,

      </if>

      <if test="loginCity != null" >

        login_city,

      </if>

      <if test="logoutTime != null" >

        logout_time,

      </if>

      <if test="chatId != null" >

        chat_id,

      </if>

      <if test="isAuthentication != null" >

        is_authentication,

      </if>

      <if test="status != null" >

        status,

      </if>

    </trim>

    <trim prefix="values (" suffix=")" suffixOverrides="," >

      <if test="id != null" >

        #{id,jdbcType=INTEGER},

      </if>

      <if test="username != null" >

        #{username,jdbcType=VARCHAR},

      </if>

      <if test="password != null" >

        #{password,jdbcType=VARCHAR},

      </if>

      <if test="phone != null" >

        #{phone,jdbcType=VARCHAR},

      </if>

      <if test="eamil != null" >

        #{eamil,jdbcType=VARCHAR},

      </if>

      <if test="credit != null" >

        #{credit,jdbcType=INTEGER},

      </if>

      <if test="registerTime != null" >

        #{registerTime,jdbcType=VARCHAR},

      </if>

      <if test="loginTime != null" >

        #{loginTime,jdbcType=VARCHAR},

      </if>

      <if test="loginCity != null" >

        #{loginCity,jdbcType=VARCHAR},

      </if>

      <if test="logoutTime != null" >

        #{logoutTime,jdbcType=VARCHAR},

      </if>

      <if test="chatId != null" >

        #{chatId,jdbcType=VARCHAR},

      </if>

      <if test="isAuthentication != null" >

        #{isAuthentication,jdbcType=INTEGER},

      </if>

      <if test="status != null" >

        #{status,jdbcType=INTEGER},

      </if>

    </trim>

  </insert>

  <select id="countByExample" parameterType="cn.gx.hzu.cpsh.common.pojo.TUserExample" resultType="java.lang.Integer" >

    select count(*) from t_user

    <if test="_parameter != null" >

      <include refid="Example_Where_Clause" />

    </if>

  </select>

  <update id="updateByExampleSelective" parameterType="map" >

    update t_user

    <set >

      <if test="record.id != null" >

        id = #{record.id,jdbcType=INTEGER},

      </if>

      <if test="record.username != null" >

        username = #{record.username,jdbcType=VARCHAR},

      </if>

      <if test="record.password != null" >

        password = #{record.password,jdbcType=VARCHAR},

      </if>

      <if test="record.phone != null" >

        phone = #{record.phone,jdbcType=VARCHAR},

      </if>

      <if test="record.eamil != null" >

        eamil = #{record.eamil,jdbcType=VARCHAR},

      </if>

      <if test="record.credit != null" >

        credit = #{record.credit,jdbcType=INTEGER},

      </if>

      <if test="record.registerTime != null" >

        register_time = #{record.registerTime,jdbcType=VARCHAR},

      </if>

      <if test="record.loginTime != null" >

        login_time = #{record.loginTime,jdbcType=VARCHAR},

      </if>

      <if test="record.loginCity != null" >

        login_city = #{record.loginCity,jdbcType=VARCHAR},

      </if>

      <if test="record.logoutTime != null" >

        logout_time = #{record.logoutTime,jdbcType=VARCHAR},

      </if>

      <if test="record.chatId != null" >

        chat_id = #{record.chatId,jdbcType=VARCHAR},

      </if>

      <if test="record.isAuthentication != null" >

        is_authentication = #{record.isAuthentication,jdbcType=INTEGER},

      </if>

      <if test="record.status != null" >

        status = #{record.status,jdbcType=INTEGER},

      </if>

    </set>

    <if test="_parameter != null" >

      <include refid="Update_By_Example_Where_Clause" />

    </if>

  </update>

  <update id="updateByExample" parameterType="map" >

    update t_user

    set id = #{record.id,jdbcType=INTEGER},

      username = #{record.username,jdbcType=VARCHAR},

      password = #{record.password,jdbcType=VARCHAR},

      phone = #{record.phone,jdbcType=VARCHAR},

      eamil = #{record.eamil,jdbcType=VARCHAR},

      credit = #{record.credit,jdbcType=INTEGER},

      register_time = #{record.registerTime,jdbcType=VARCHAR},

      login_time = #{record.loginTime,jdbcType=VARCHAR},

      login_city = #{record.loginCity,jdbcType=VARCHAR},

      logout_time = #{record.logoutTime,jdbcType=VARCHAR},

      chat_id = #{record.chatId,jdbcType=VARCHAR},

      is_authentication = #{record.isAuthentication,jdbcType=INTEGER},

      status = #{record.status,jdbcType=INTEGER}

    <if test="_parameter != null" >

      <include refid="Update_By_Example_Where_Clause" />

    </if>

  </update>

  <update id="updateByPrimaryKeySelective" parameterType="cn.gx.hzu.cpsh.common.pojo.TUser" >

    update t_user

    <set >

      <if test="username != null" >

        username = #{username,jdbcType=VARCHAR},

      </if>

      <if test="password != null" >

        password = #{password,jdbcType=VARCHAR},

      </if>

      <if test="phone != null" >

        phone = #{phone,jdbcType=VARCHAR},

      </if>

      <if test="eamil != null" >

        eamil = #{eamil,jdbcType=VARCHAR},

      </if>

      <if test="credit != null" >

        credit = #{credit,jdbcType=INTEGER},

      </if>

      <if test="registerTime != null" >

        register_time = #{registerTime,jdbcType=VARCHAR},

      </if>

      <if test="loginTime != null" >

        login_time = #{loginTime,jdbcType=VARCHAR},

      </if>

      <if test="loginCity != null" >

        login_city = #{loginCity,jdbcType=VARCHAR},

      </if>

      <if test="logoutTime != null" >

        logout_time = #{logoutTime,jdbcType=VARCHAR},

      </if>

      <if test="chatId != null" >

        chat_id = #{chatId,jdbcType=VARCHAR},

      </if>

      <if test="isAuthentication != null" >

        is_authentication = #{isAuthentication,jdbcType=INTEGER},

      </if>

      <if test="status != null" >

        status = #{status,jdbcType=INTEGER},

      </if>

    </set>

    where id = #{id,jdbcType=INTEGER}

  </update>

  <update id="updateByPrimaryKey" parameterType="cn.gx.hzu.cpsh.common.pojo.TUser" >

    update t_user

    set username = #{username,jdbcType=VARCHAR},

      password = #{password,jdbcType=VARCHAR},

      phone = #{phone,jdbcType=VARCHAR},

      eamil = #{eamil,jdbcType=VARCHAR},

      credit = #{credit,jdbcType=INTEGER},

      register_time = #{registerTime,jdbcType=VARCHAR},

      login_time = #{loginTime,jdbcType=VARCHAR},

      login_city = #{loginCity,jdbcType=VARCHAR},

      logout_time = #{logoutTime,jdbcType=VARCHAR},

      chat_id = #{chatId,jdbcType=VARCHAR},

      is_authentication = #{isAuthentication,jdbcType=INTEGER},

      status = #{status,jdbcType=INTEGER}

    where id = #{id,jdbcType=INTEGER}

  </update>

</mapper>

　　生成好代码之后我们就可以掉mapper接口的方法愉快的进行开发了，配合上pagehelpr插件，轻松实现分页、排序

　　如果你也在用Mybatis，建议尝试该分页插件，这个一定是最方便使用的分页插件。该插件目前支持Oracle,Mysql,MariaDB,SQLite,Hsqldb,PostgreSQL六种数据库分页。

　　maven

    <dependency>

        <groupId>com.github.pagehelper</groupId>

        <artifactId>pagehelper</artifactId>

        <version>3.4.2-fix</version>

    </dependency>

　　第一步：在Mybatis配置xml中配置拦截器插件:

<!-- 配置分页插件 -->

<plugins>

    <plugin interceptor="com.github.pagehelper.PageHelper">

        <!-- 设置数据库类型 Oracle,Mysql,MariaDB,SQLite,Hsqldb,PostgreSQL六种数据库-->

        <property name="dialect" value="mysql"/>

    </plugin>

</plugins>

　　第二步：在代码中使用

//分页处理  page当前页   rows每页多少条记录

PageHelper.startPage(page, rows);

//紧跟着的第一个select就会被分页 查询回来的list大小为rows

List<TbItem> list = itemMapper.selectByExample(example);

//使用PageInfo对结果集进行包装 通过包装后的pageinfo对象取得相关数据

PageInfo<TbItem> pageInfo = new PageInfo<>(list);

　　PageInfo类  定义的属性：

    //当前页

    private int pageNum;

    //每页的数量

    private int pageSize;

    //当前页的数量

    private int size;

    //排序

    private String orderBy;

    //由于startRow和endRow不常用，这里说个具体的用法

    //可以在页面中"显示startRow到endRow 共size条数据"

    private int startRow;

    private int endRow;

    //当前页面第一个元素在数据库中的行号

    private int startRow;

    //当前页面最后一个元素在数据库中的行号

    private int endRow;

    //总记录数

    private long total;

    //总页数

    private int pages;

    //结果集

    private List<T> list;

    //第一页

    private int firstPage;

    //前一页

    private int prePage;

    //下一页

    private int nextPage;

    //最后一页

    private int lastPage;

    //是否为第一页

    private boolean isFirstPage = false;

    //是否为最后一页

    private boolean isLastPage = false;

    //是否有前一页

    private boolean hasPreviousPage = false;

    //是否有下一页

    private boolean hasNextPage = false;

    //导航页码数

    private int navigatePages;

    //所有导航页号

    private int[] navigatepageNums;

　　

　　原理：分页插件会自动在你的查询语句后面添加 order by addtime DESC limit ?,?

　　使用原理：
　　pageHelper会使用ThreadLocal获取到同一线程中的变量信息，各个线程之间的Threadlocal不会相互干扰，也就是Thread1中的ThreadLocal1之后获取到Tread1中的变量的信息，不会获取到Thread2中的信息
　　所以在多线程环境下，各个Threadlocal之间相互隔离，可以实现，不同thread使用不同的数据源或不同的Thread中执行不同的SQL语句
　　所以，PageHelper利用这一点通过拦截器获取到同一线程中的预编译好的SQL语句之后将SQL语句包装成具有分页功能的SQL语句，并将其再次赋值给下一步操作，所以实际执行的SQL语句就是有了分页功能的SQL语句
　　

　　注意：
　　1、只有紧跟在PageHelper.startPage方法后的第一个Mybatis的查询（Select方法）方法会被分页。
　　2、分页插件不支持带有for update语句的分页
　　3、分页插件不支持关联结果查询

　　效果展示

　　经测试，注解方式跟配置XML方式效果一致，传参、调用方式、返回结果都一致，接口均能正常调用。

　　insert接口

　　update接口

　　select接口

　　delete接口

　　后记

　　MyBatis 是一款优秀的持久层框架，它支持定制化 SQL、存储过程以及高级映射。MyBatis 避免了几乎所有的 JDBC 代码和手动设置参数以及获取结果集。MyBatis 可以使用简单的 XML 或注解来配置和映射原生信息，将接口和 Java 的 POJOs(Plain Old Java Objects,普通的 Java对象)映射成数据库中的记录。

　　当我们一说起mybatis就会默默滴跟hibernate进行对比：

　　Hibernate DAO层开发比较简单，sql语句都封装好了，mybatis需要维护sql，手动写
　　Hibernate可移植性高，更改数据库方言即可，mybatis可移植性差，不同的数据库sql不同
　　Mybatis可以进行更细致的sql优化，减少没必要的查询字段，而hibernate封装太过彻底

　　代码开源

　　代码已经开源、托管到我的GitHub、码云：

　　GitHub：https://github.com/huanzi-qch/springBoot

　　码云：https://gitee.com/huanzi-qch/springBoot

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