1 环境准备

1.1 软件架构

JDK 1.8

Spring 4.x

Mybatis 3.x

Maven 3.x

MySQL 5.7

1.2 创建数据库

创建数据库，数据库名ssm-demo，字符集utf-8，排序规则默认。

  1. DROP TABLE IF EXISTS `t_user`;
  2. CREATE TABLE `t_user` (
  3. 	`id` BIGINT ( 20 ) NOT NULL AUTO_INCREMENT,
  4. 	`username` VARCHAR ( 60 ) DEFAULT NULL,
  5. 	`password` VARCHAR ( 60 ) DEFAULT NULL,
  6. 	`nick_name` VARCHAR ( 60 ) DEFAULT NULL,
  7. 	`telephone` VARCHAR ( 60 ) DEFAULT NULL,
  8. 	`email` VARCHAR ( 60 ) DEFAULT NULL,
  9. 	`birthday` date DEFAULT NULL,
  10. 	`gender` CHAR ( 1 ) DEFAULT NULL,
  11. 	`status` CHAR ( 1 ) DEFAULT NULL,
  12. 	`create_time` datetime DEFAULT NULL,
  13. 	`update_time` datetime DEFAULT NULL,
  14. 	 PRIMARY KEY ( `id` )
  15. );

1.3 Maven配置

修改settings.xml配置。

  1. <!-- 设置aliyun镜像 -->
  2. <mirrors>
  3.     <mirror>
  4.         <id>alimaven</id>
  5.         <name>aliyun maven</name>
  6.         <url>http://maven.aliyun.com/nexus/content/groups/public/</url>
  7.         <mirrorOf>central</mirrorOf>
  8.     </mirror>
  9. </mirrors>
  11. <!-- 设置jdk1.8版本编译 -->
  12. <profiles>
  13.     <profile>
  14.         <id>jdk8</id>
  15.         <activation>
  16.             <activeByDefault>true</activeByDefault>
  17.             <jdk>1.8</jdk>
  18.         </activation>
  19.         <properties>
  20.             <maven.compiler.source>1.8</maven.compiler.source>
  21.             <maven.compiler.target>1.8</maven.compiler.target>
  22.             <maven.compiler.compilerVersion>1.8</maven.compiler.compilerVersion>
  23.         </properties>
  24.     </profile>
  25. </profiles>

1.4 创建工程

点击next，填写相关信息。

点击next创建项目。

在main文件夹下创建java文件夹、resources文件夹，在src文件夹下创建test文件夹，在test文件夹下创建java文件夹。

定义文件夹类型，main文件夹下java文件夹选择Sources Root，resources文件夹选择 Resources Root，test文件夹下java文件夹选择Tests。

点击ok。

1.4 配置tomcat

选择tomcat路径。

点击fix。

选择war-exploded。

修改Application context。

点击ok。

1.5 添加Maven依赖

完整的pom.xml。

  1. <?xml version="1.0" encoding="UTF-8"?>
  3. <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  4.          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  5.     <modelVersion>4.0.0</modelVersion>
  7.     <groupId>com.zl</groupId>
  8.     <artifactId>ssm-demo</artifactId>
  9.     <version>1.0-SNAPSHOT</version>
  10.     <packaging>war</packaging>
  11.     <name>ssm-demo </name>
  13.     <properties>
  14.         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  15.         <maven.compiler.source>1.8</maven.compiler.source>
  16.         <maven.compiler.target>1.8</maven.compiler.target>
  17.         <spring.version>4.3.7.RELEASE</spring.version>
  18.     </properties>
  20.     <dependencies>
  22.         <!-- spring、springmvc -->
  23.         <dependency>
  24.             <groupId>org.springframework</groupId>
  25.             <artifactId>spring-webmvc</artifactId>
  26.             <version>${spring.version}</version>
  27.         </dependency>
  29.         <dependency>
  30.             <groupId>org.springframework</groupId>
  31.             <artifactId>spring-jdbc</artifactId>
  32.             <version>${spring.version}</version>
  33.         </dependency>
  35.         <dependency>
  36.             <groupId>org.springframework</groupId>
  37.             <artifactId>spring-test</artifactId>
  38.             <version>${spring.version}</version>
  39.         </dependency>
  41.         <dependency>
  42.             <groupId>org.springframework</groupId>
  43.             <artifactId>spring-aspects</artifactId>
  44.             <version>${spring.version}</version>
  45.         </dependency>
  47.         <!-- mybatis -->
  48.         <dependency>
  49.             <groupId>org.mybatis</groupId>
  50.             <artifactId>mybatis</artifactId>
  51.             <version>3.4.2</version>
  52.         </dependency>
  54.         <dependency>
  55.             <groupId>org.mybatis</groupId>
  56.             <artifactId>mybatis-spring</artifactId>
  57.             <version>1.3.1</version>
  58.         </dependency>
  60.         <!-- pageHelper分页插件 -->
  61.         <dependency>
  62.             <groupId>com.github.pagehelper</groupId>
  63.             <artifactId>pagehelper</artifactId>
  64.             <version>5.0.0</version>
  65.         </dependency>
  67.         <dependency>
  68.             <groupId>mysql</groupId>
  69.             <artifactId>mysql-connector-java</artifactId>
  70.             <version>5.1.41</version>
  71.         </dependency>
  73.         <dependency>
  74.             <groupId>c3p0</groupId>
  75.             <artifactId>c3p0</artifactId>
  76.             <version>0.9.1</version>
  77.         </dependency>
  79.         <!-- jstl、servlet-api -->
  80.         <dependency>
  81.             <groupId>jstl</groupId>
  82.             <artifactId>jstl</artifactId>
  83.             <version>1.2</version>
  84.         </dependency>
  86.         <dependency>
  87.             <groupId>javax.servlet</groupId>
  88.             <artifactId>javax.servlet-api</artifactId>
  89.             <version>3.0.1</version>
  90.             <scope>provided</scope>
  91.         </dependency>
  93.         <!-- junit -->
  94.         <dependency>
  95.             <groupId>junit</groupId>
  96.             <artifactId>junit</artifactId>
  97.             <version>4.12</version>
  98.         </dependency>
  99.     </dependencies>
  101.     <build>
  102.         <finalName>ssm-demo</finalName>
  103.         <pluginManagement>
  104.             <plugins>
  105.                 <plugin>
  106.                     <artifactId>maven-clean-plugin</artifactId>
  107.                     <version>3.1.0</version>
  108.                 </plugin>
  109.                 <plugin>
  110.                     <artifactId>maven-resources-plugin</artifactId>
  111.                     <version>3.0.2</version>
  112.                 </plugin>
  113.                 <plugin>
  114.                     <artifactId>maven-compiler-plugin</artifactId>
  115.                     <version>3.8.0</version>
  116.                 </plugin>
  117.                 <plugin>
  118.                     <artifactId>maven-surefire-plugin</artifactId>
  119.                     <version>2.22.1</version>
  120.                 </plugin>
  121.                 <plugin>
  122.                     <artifactId>maven-war-plugin</artifactId>
  123.                     <version>3.2.2</version>
  124.                 </plugin>
  125.                 <plugin>
  126.                     <artifactId>maven-install-plugin</artifactId>
  127.                     <version>2.5.2</version>
  128.                 </plugin>
  129.                 <plugin>
  130.                     <artifactId>maven-deploy-plugin</artifactId>
  131.                     <version>2.8.2</version>
  132.                 </plugin>
  133.             </plugins>
  134.         </pluginManagement>
  135.     </build>
  136. </project>

1.6 添加配置文件

1.6.1 applicationContext.xml

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <beans xmlns="http://www.springframework.org/schema/beans"
  3.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  4.        xmlns:context="http://www.springframework.org/schema/context"
  5.        xmlns:aop="http://www.springframework.org/schema/aop"
  6.        xmlns:tx="http://www.springframework.org/schema/tx"
  7.        xsi:schemaLocation="http://www.springframework.org/schema/aop
  8.        	http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
  9. 		http://www.springframework.org/schema/beans
  10. 		http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
  11. 		http://www.springframework.org/schema/tx
  12. 		http://www.springframework.org/schema/tx/spring-tx-4.3.xsd
  13. 		http://www.springframework.org/schema/context
  14. 		http://www.springframework.org/schema/context/spring-context-4.3.xsd">
  16. 	<!-- 配置包扫描 -->
  17. 	<context:component-scan base-package="com.zl" />
  19. 	<!-- 引入配置文件 -->
  20. 	<context:property-placeholder location="classpath:jdbc.properties"/>
  22. 	<!-- 配置数据源 -->
  23. 	<bean id="myDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
  24. 		<property name="driverClass" value="${jdbc.driverClass}"/>
  25. 		<property name="jdbcUrl" value="${jdbc.jdbcUrl}"/>
  26. 		<property name="user" value="${jdbc.user}"/>
  27. 		<property name="password" value="${jdbc.password}"/>
  28.     </bean>
  30.     <!-- Spring整合Mybatis -->
  31.     <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
  32. 		<!-- 指定Mybatis核心配置文件 -->
  33. 		<property name="configLocation" value="classpath:sqlMapConfig.xml"/>
  34. 		<!-- 配置数据源 -->
  35. 		<property name="dataSource" ref="myDataSource"/>
  36.         <!-- 指定Mapper文件的位置 -->
  37. 		<property name="mapperLocations" value="classpath:mapper/*.xml"/>
  38.     </bean>
  40.     <!-- Mapper代理形式开发dao，扫描包形式配置mapper -->
  41.     <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
  42. 		<property name="basePackage" value="com.zl.dao"/>
  43.     </bean>
  45.     <!-- 配置事务管理器 -->
  46.     <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
  47. 		<property name="dataSource" ref="myDataSource"/>
  48.     </bean>
  50. 	<!-- 通知 -->
  51. 	<tx:advice id="txAdvice" transaction-manager="transactionManager">
  52.         <tx:attributes>
  53. 			<!-- 传播行为 -->
  54. 			<tx:method name="save*" propagation="REQUIRED" />
  55. 			<tx:method name="insert*" propagation="REQUIRED" />
  56. 			<tx:method name="add*" propagation="REQUIRED" />
  57. 			<tx:method name="create*" propagation="REQUIRED" />
  58. 			<tx:method name="delete*" propagation="REQUIRED" />
  59. 			<tx:method name="update*" propagation="REQUIRED" />
  60. 			<tx:method name="find*" propagation="SUPPORTS" read-only="true" />
  61. 			<tx:method name="select*" propagation="SUPPORTS" read-only="true" />
  62. 			<tx:method name="get*" propagation="SUPPORTS" read-only="true" />
  63. 			<tx:method name="query*" propagation="SUPPORTS" read-only="true" />
  64.         </tx:attributes>
  65.     </tx:advice>
  67. 	<!-- 切面 -->
  68. 	<aop:config>
  69. 		<!-- 切入点表达式 -->
  70. 		<aop:pointcut expression="execution(* com.zl.service..*(..))" id="txPoint"/>
  71. 		<!-- 配置事务增强 -->
  72. 		<aop:advisor advice-ref="txAdvice" pointcut-ref="txPoint"/>
  73. 	</aop:config>
  75. </beans>

1.6.2 springMvc.xml

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <beans xmlns="http://www.springframework.org/schema/beans"
  3.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  4.        xmlns:context="http://www.springframework.org/schema/context"
  5.        xmlns:mvc="http://www.springframework.org/schema/mvc"
  6.        xsi:schemaLocation="http://www.springframework.org/schema/beans
  7.        http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
  8.         http://www.springframework.org/schema/mvc
  9.         http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
  10.         http://www.springframework.org/schema/context
  11.         http://www.springframework.org/schema/context/spring-context-4.3.xsd">
  13.     <!-- 配置Controller包扫描 -->
  14.     <context:component-scan base-package="com.zl.controller"/>
  16.     <!-- 配置注解驱动 -->
  17.     <mvc:annotation-driven/>
  19.     <!-- 配置视图解析器 -->
  20.     <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
  21.         <!-- 前缀 -->
  22.         <property name="prefix" value="/WEB-INF/jsp/"/>
  23.         <!-- 后缀 -->
  24.         <property name="suffix" value=".jsp"/>
  25.     </bean>
  26. </beans>

1.6.3 sqlMapConfig.xml

  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. <configuration>
  7. 	<settings>
  8. 		<setting name="mapUnderscoreToCamelCase" value="true"/>
  9. 	</settings>
  11. 	<typeAliases>
  12. 		<!-- 批量别名定义，扫描整个包下的类，别名为类名（大小写不敏感） -->
  13. 		<package name="com.zl.domain" />
  14. 	</typeAliases>
  16. 	<plugins>
  17. 		<!-- pageHelper分页插件配置 -->
  18. 		<plugin interceptor="com.github.pagehelper.PageInterceptor">
  19. 			<!-- 分页参数合理化 -->
  20. 			<property name="reasonable" value="true"/>
  21. 		</plugin>
  22. 	</plugins>
  24. </configuration>

1.6.4 jdbc.properties

  1. jdbc.driverClass=com.mysql.jdbc.Driver
  2. jdbc.jdbcUrl=jdbc:mysql://localhost:3306/ssm-demo
  3. jdbc.user=root
  4. jdbc.password=1234

1.6.5 log4j.properties

  1. log4j.rootLogger=DEBUG, stdout
  3. log4j.appender.stdout=org.apache.log4j.ConsoleAppender
  4. log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
  5. log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n

1.6.6 web.xml

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  3.          xmlns="http://java.sun.com/xml/ns/javaee"
  4.          xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
  5.          id="WebApp_ID" version="2.5">
  6.     <welcome-file-list>
  7.         <welcome-file>index.jsp</welcome-file>
  8.     </welcome-file-list>
  10.     <!-- Spring上下文的位置 -->
  11.     <context-param>
  12.         <param-name>contextConfigLocation</param-name>
  13.         <param-value>classpath:applicationContext.xml</param-value>
  14.     </context-param>
  16.     <!-- Spring的监听器 -->
  17.     <listener>
  18.         <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  19.     </listener>
  21.     <!-- SpringMVC前端控制器 -->
  22.     <servlet>
  23.         <servlet-name>dispatcherServlet</servlet-name>
  24.         <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  25.         <init-param>
  26.             <param-name>contextConfigLocation</param-name>
  27.             <!-- 此处不配置 默认找 /WEB-INF/[servlet-name]-servlet.xml -->
  28.             <param-value>classpath:springMvc.xml</param-value>
  29.         </init-param>
  30.         <load-on-startup>1</load-on-startup>
  31.     </servlet>
  32.     <servlet-mapping>
  33.         <servlet-name>dispatcherServlet</servlet-name>
  34.         <url-pattern>/</url-pattern>
  35.     </servlet-mapping>
  37.     <!-- 字符编码过滤器，一定要放在所有过滤器之前 -->
  38.     <filter>
  39.         <filter-name>CharacterEncodingFilter</filter-name>
  40.         <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
  41.         <init-param>
  42.             <param-name>encoding</param-name>
  43.             <param-value>utf-8</param-value>
  44.         </init-param>
  45.         <init-param>
  46.             <param-name>forceRequestEncoding</param-name>
  47.             <param-value>true</param-value>
  48.         </init-param>
  49.         <init-param>
  50.             <param-name>forceResponseEncoding</param-name>
  51.             <param-value>true</param-value>
  52.         </init-param>
  53.     </filter>
  54.     <filter-mapping>
  55.         <filter-name>CharacterEncodingFilter</filter-name>
  56.         <url-pattern>/*</url-pattern>
  57.     </filter-mapping>
  59. </web-app>

1.7 编写代码

1.7.1 domain代码

  1. @Data
  2. public class User implements Serializable {
  4.     private static final long serialVersionUID = -7761320977621867375L;
  6.     private Long id;
  7.     private String username;
  8.     private String password;
  9.     private String nickName;
  10.     private String telephone;
  11.     private String email;
  12.     private Date birthday;
  13.     private String gender;
  14.     private String status;
  15.     private Date createTime;
  16.     private Date updateTime;
  18. }

1.7.2 dao代码

  1. public interface UserDao {
  3.     List<User> queryUsersList(User user);
  5.     int queryUsersCount(User user);
  7.     User queryUserById(Long id);
  9.     List<User> queryUsers();
  11.     List<User> queryUsersByIds(Long[] ids);
  13.     void insertUser(User user);
  15.     void updateUser(User user);
  17.     void deleteUserById(Long id);
  19.     void deleteUsersByIds(Long[] ids);
  21. }

1.7.3 mapper文件

  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="com.zl.dao.UserDao">
  7.     <!-- 声明sql片段 -->
  8.     <sql id="userColumns">
  9.         id
  10.         , username, password, nick_name, telephone, email, birthday, gender, status, create_time, update_time
  11.     </sql>
  13.     <!-- resultMap可以实现将查询结果映射为复杂类型的pojo，比如在查询结果映射对象中包括pojo和list实现一对一查询和一对多查询 -->
  14.     <resultMap id="userResult" type="User">
  15.         <id property="id" column="id"/>
  16.         <result property="username" column="username"/>
  17.         <result property="password" column="password"/>
  18.         <result property="nickName" column="nick_name"/>
  19.         <result property="telephone" column="telephone"/>
  20.         <result property="email" column="email"/>
  21.         <result property="birthday" column="birthday"/>
  22.         <result property="gender" column="gender"/>
  23.         <result property="status" column="status"/>
  24.         <result property="createTime" column="create_time"/>
  25.         <result property="updateTime" column="update_time"/>
  26.         <!-- association ：配置一对一的关系 -->
  27.         <!-- collection ：配置一对多的关系 -->
  28.     </resultMap>
  30.     <!-- 分页查询 -->
  31.     <!-- 注意这里的 resultType 返回值类型是集合内存储数据的类型，不是 'list' -->
  32.     <select id="queryUsersList" parameterType="User"
  33.             resultMap="userResult">
  34.         select
  35.         <include refid="userColumns"/>
  36.         from t_user
  37.         <where>
  38.             <if test="username != null and username != ''">
  39.                 and username like concat('%', #{username}, '%')
  40.             </if>
  41.             <if test="nickName != null and nickName != ''">
  42.                 and nick_name like concat('%', #{nickName}, '%')
  43.             </if>
  44.             <if test="telephone != null and telephone != ''">
  45.                 and telephone like concat('%', #{telephone}, '%')
  46.             </if>
  47.         </where>
  48.     </select>
  50.     <!-- 查询条数 -->
  51.     <select id="queryUsersCount" parameterType="User"
  52.             resultType="Integer">
  53.         select count(1) from t_user
  54.         <where>
  55.             <if test="username != null and username != ''">
  56.                 and username like concat('%', #{username}, '%')
  57.             </if>
  58.             <if test="nickName != null and nickName != ''">
  59.                 and nick_name like concat('%', #{nickName}, '%')
  60.             </if>
  61.             <if test="telephone != null and telephone != ''">
  62.                 and telephone like concat('%', #{telephone}, '%')
  63.             </if>
  64.         </where>
  65.     </select>
  67.     <!-- 查询全部 -->
  68.     <select id="queryUsers" parameterType="String" resultMap="userResult">
  69.         select
  70.         <include refid="userColumns"/>
  71.         from t_user
  72.     </select>
  74.     <!-- 精确查询 -->
  75.     <select id="queryUserById" parameterType="Long" resultMap="userResult">
  76.         select
  77.         <include refid="userColumns"/>
  78.         from
  79.         t_user where id = #{id}
  80.     </select>
  82.     <!-- 批量查询 -->
  83.     <select id="queryUsersByIds" parameterType="Long" resultMap="userResult">
  84.         select
  85.         <include refid="userColumns"/>
  86.         from
  87.         t_user
  88.         <where>
  89.             <foreach collection="array" item="id" open="id in (" close=")"
  90.                      separator=",">
  91.                 #{id}
  92.             </foreach>
  93.         </where>
  94.     </select>
  96.     <!-- 添加 -->
  97.     <insert id="insertUser" parameterType="User">
  98.         <!-- mysql自增主键返回，数据库表主键设置为自动递增 -->
  99.         <selectKey keyProperty="id" keyColumn="id" order="AFTER" resultType="Long">
  100.             select last_insert_id()
  101.         </selectKey>
  102.         insert into t_user
  103.         (username, password, nick_name, telephone, email, birthday, gender, status, create_time, update_time)
  104.         values (#{username}, #{password}, #{nickName}, #{email}, #{telephone}, #{birthday}, #{gender},
  105.         #{status}, #{createTime},
  106.         #{updateTime})
  107.     </insert>
  109.     <!-- 更新 -->
  110.     <update id="updateUser" parameterType="User">
  111.         update t_user
  112.         <set>
  113.             <if test="username != null and username != ''">
  114.                 username = #{username},
  115.             </if>
  116.             <if test="password != null and password != ''">
  117.                 password = #{password},
  118.             </if>
  119.             <if test="nickName != null and nickName != ''">
  120.                 nick_name = #{nickName},
  121.             </if>
  122.             <if test="telephone != null and telephone != ''">
  123.                 telephone = #{telephone},
  124.             </if>
  125.             <if test="email != null and email != ''">
  126.                 email = #{email},
  127.             </if>
  128.             <if test="birthday != null">
  129.                 birthday = #{birthday},
  130.             </if>
  131.             <if test="gender != null and gender != ''">
  132.                 gender = #{gender},
  133.             </if>
  134.             <if test="status != null and status != ''">
  135.                 status = #{status},
  136.             </if>
  137.             <if test="createTime != null">
  138.                 create_time = #{createTime},
  139.             </if>
  140.             <if test="updateTime != null">
  141.                 update_time = #{updateTime},
  142.             </if>
  143.         </set>
  144.         where id = #{id}
  145.     </update>
  147.     <!-- 删除 -->
  148.     <delete id="deleteUserById" parameterType="Long">
  149.         delete
  150.         from t_user
  151.         where id = #{id}
  152.     </delete>
  154.     <!-- 批量删除 -->
  155.     <delete id="deleteUsersByIds" parameterType="Long">
  156.         delete from t_user
  157.         <where>
  158.             <!-- foreach标签，进行遍历 -->
  159.             <!-- collection：遍历的集合-->
  160.             <!-- item：遍历的项目，可以随便写，，但是和后面的#{}里面要一致 -->
  161.             <!-- open：在前面添加的sql片段 -->
  162.             <!-- close：在结尾处添加的sql片段 -->
  163.             <!-- separator：指定遍历的元素之间使用的分隔符 -->
  164.             <foreach collection="array" item="id" open="id in (" close=")"
  165.                      separator=",">
  166.                 #{id}
  167.             </foreach>
  168.         </where>
  169.     </delete>
  171.     <!-- 根据用户名密码查询用户 -->
  172.     <select id="queryUserByUsernameAndPassword" parameterType="User" resultMap="userResult">
  173.         select
  174.         <include refid="userColumns"/>
  175.         from
  176.         t_user
  177.         <where>
  178.             <if test="username != null and username != ''">
  179.                 and username = #{username}
  180.             </if>
  181.             <if test="password != null and password != ''">
  182.                 and password = #{password}
  183.             </if>
  184.         </where>
  185.     </select>
  186. </mapper>

1.7.4 service代码

  1. public interface UserService {
  3.     List<User> queryUsersList(User user);
  5.     int queryUsersCount(User user);
  7.     User queryUserById(Long id);
  9.     List<User> queryUsers();
  11.     List<User> queryUsersByIds(Long[] ids);
  13.     void insertUser(User user);
  15.     void updateUser(User user);
  17.     void deleteUserById(Long id);
  19.     void deleteUsersByIds(Long[] ids);
  21. }
  1. @Service
  2. public class UserServiceImpl implements UserService {
  4.     @Autowired
  5.     private UserDao userDao;
  7.     @Override
  8.     public List<User> queryUsersList(User user) {
  9.         return userDao.queryUsersList(user);
  10.     }
  12.     @Override
  13.     public int queryUsersCount(User user) {
  14.         return userDao.queryUsersCount(user);
  15.     }
  17.     @Override
  18.     public User queryUserById(Long id) {
  19.         return userDao.queryUserById(id);
  20.     }
  22.     @Override
  23.     public List<User> queryUsers() {
  24.         return userDao.queryUsers();
  25.     }
  27.     @Override
  28.     public List<User> queryUsersByIds(Long[] ids) {
  29.         return userDao.queryUsersByIds(ids);
  30.     }
  32.     @Override
  33.     public void insertUser(User user) {
  34.         userDao.insertUser(user);
  35.     }
  37.     @Override
  38.     public void updateUser(User user) {
  39.         userDao.updateUser(user);
  40.     }
  42.     @Override
  43.     public void deleteUserById(Long id) {
  44.         userDao.deleteUserById(id);
  45.     }
  47.     @Override
  48.     public void deleteUsersByIds(Long[] ids) {
  49.         userDao.deleteUsersByIds(ids);
  50.     }
  52.     @Override
  53.     public User queryUserByUsernameAndPassword(User user) {
  54.         return userDao.queryUserByUsernameAndPassword(user);
  55.     }
  56. }

1.7.5 controller代码

1.8 测试

  1. @RunWith(SpringJUnit4ClassRunner.class)
  2. @WebAppConfiguration
  3. @ContextConfiguration(locations = {"classpath:applicationContext.xml"})
  4. public class UserTest {
  6.     @Autowired
  7.     private UserDao userDao;
  9.     @Test
  10.     public void insert() {
  11.         for (int i = 0; i < 20; i++) {
  12.             User user = new User();
  13.             user.setUsername("user" + i);
  14.             user.setPassword("123456");
  15.             user.setNickName("用户" + i);
  16.             user.setCreateTime(new Date());
  17.             userDao.insertUser(user);
  18.         }
  19.     }
  21.     @Test
  22.     public void update() {
  23.         User user = userDao.queryUserById(2L);
  24.         user.setUsername("hahaha");
  25.         user.setUpdateTime(new Date());
  26.         userDao.updateUser(user);
  27.     }
  29.     @Test
  30.     public void deleteById() {
  31.         userDao.deleteUserById(2L);
  32.     }
  34.     @Test
  35.     public void deleteByIds() {
  36.         userDao.deleteUsersByIds(new Long[]{3L, 4L});
  37.     }
  39.     @Test
  40.     public void query() {
  41.         // pageHelper分页的一种
  42.         PageHelper.startPage(1, 10);
  43.         PageHelper.orderBy("create_time desc");
  44.         List<User> list = userDao.queryUsersList(new User());
  45.         int count = userDao.queryUsersCount(new User());
  46.         System.out.println(list);
  47.         System.out.println(count);
  48.     }
  49. }

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