最近工作中用到了mybatis的Java API方式进行开发，顺便也整理下该功能的用法，接下来会针对基本部分进行学习：

1）Java API处理一对多、多对一的用法；

2）增、删、改、查的用法；

3）涉及到类型转化的用法；

4）批量修改、批量查询、批量新增的用法(介绍的方案只使用于小批量数据处理，如果大批量数据处理，还需要使用ExecutorType.BATCH)。

Mybatis官网给了具体的文档，但是并没有对以上用法具体介绍，因此在这里整理下，以便以后工作用到时，可以参考。

本章主要使用Mybatis中使用typeHandlers进行对Enum进行转化的用法（本章将结合Spring自动注入《Spring（二十三）：Spring自动注入的实现方式》）

本章将分为以下几部分：

1）环境搭建（maven+mybatis+spring整合）；

2）查询、批量查询；

3）新增、批量新增；

4）修改、批量修改；

5）删除、批量删除。

下面我们针对每个步骤进行详细讲解。

1）环境搭建（maven+mybatis+spring整合）

新建maven项目 Learn-Spring-01，并在pom.xml导入mybatis/spring/mysql/druid/junit包，完整的pom.xml文章如下：

  1. <project xmlns="http://maven.apache.org/POM/4.0.0"
  2.     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  3.     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  4.     <modelVersion>4.0.0</modelVersion>
  5.  
  6.     <groupId>com.dx.test</groupId>
  7.     <artifactId>Learn-Spring-01</artifactId>
  8.     <version>0.0.1-SNAPSHOT</version>
  9.     <packaging>jar</packaging>
  10.  
  11.     <name>Learn-Spring-01</name>
  12.     <url>http://maven.apache.org</url>
  13.  
  14.     <properties>
  15.         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  16.         <maven.compiler.source>1.8</maven.compiler.source>
  17.         <maven.compiler.target>1.8</maven.compiler.target>
  18.         <!--Spring版本号 -->
  19.         <org.springframework.version>5.2.0.RELEASE</org.springframework.version>
  20.         <org.mybatis.version>3.4.6</org.mybatis.version>
  21.         <com.alibaba.version>1.1.21</com.alibaba.version>
  22.         <mysql.version>8.0.11</mysql.version>
  23.     </properties>
  24.  
  25.     <dependencies>
  26.         <dependency>
  27.             <groupId>org.springframework</groupId>
  28.             <artifactId>spring-webmvc</artifactId>
  29.             <version>${org.springframework.version}</version>
  30.         </dependency>
  31.         <dependency>
  32.             <groupId>org.springframework</groupId>
  33.             <artifactId>spring-tx</artifactId>
  34.             <version>${org.springframework.version}</version>
  35.         </dependency>
  36.         <dependency>
  37.             <groupId>org.springframework</groupId>
  38.             <artifactId>spring-jdbc</artifactId>
  39.             <version>${org.springframework.version}</version>
  40.         </dependency>
  41.         <dependency>
  42.             <groupId>org.springframework</groupId>
  43.             <artifactId>spring-core</artifactId>
  44.             <version>${org.springframework.version}</version>
  45.         </dependency>
  46.         <dependency>
  47.             <groupId>org.springframework</groupId>
  48.             <artifactId>spring-beans</artifactId>
  49.             <version>${org.springframework.version}</version>
  50.         </dependency>
  51.         <dependency>
  52.             <groupId>org.springframework</groupId>
  53.             <artifactId>spring-context</artifactId>
  54.             <version>${org.springframework.version}</version>
  55.         </dependency>
  56.         <dependency>
  57.             <groupId>org.springframework</groupId>
  58.             <artifactId>spring-context-support</artifactId>
  59.             <version>${org.springframework.version}</version>
  60.         </dependency>
  61.         <dependency>
  62.             <groupId>org.springframework</groupId>
  63.             <artifactId>spring-aop</artifactId>
  64.             <version>${org.springframework.version}</version>
  65.         </dependency>
  66.         <dependency>
  67.             <groupId>aspectj</groupId>
  68.             <artifactId>aspectjweaver</artifactId>
  69.             <version>1.5.4</version>
  70.         </dependency>
  71.         <dependency>
  72.             <groupId>aspectj</groupId>
  73.             <artifactId>aspectjrt</artifactId>
  74.             <version>1.5.4</version>
  75.         </dependency>
  76.         <!-- Sping Test相关依赖 -->
  77.         <dependency>
  78.             <groupId>org.springframework</groupId>
  79.             <artifactId>spring-test</artifactId>
  80.             <version>${org.springframework.version}</version>
  81.         </dependency>
  82.  
  83.         <!--MyBatis -->
  84.         <dependency>
  85.             <groupId>org.mybatis</groupId>
  86.             <artifactId>mybatis</artifactId>
  87.             <version>${org.mybatis.version}</version>
  88.         </dependency>
  89.         <!-- Mybatis自身实现的Spring整合依赖 -->
  90.         <dependency>
  91.             <groupId>org.mybatis</groupId>
  92.             <artifactId>mybatis-spring</artifactId>
  93.             <version>2.0.3</version>
  94.         </dependency>
  95.  
  96.         <!--MySql数据库驱动 -->
  97.         <!-- https://mvnrepository.com/artifact/com.alibaba/druid -->
  98.         <dependency>
  99.             <groupId>com.alibaba</groupId>
  100.             <artifactId>druid</artifactId>
  101.             <version>${com.alibaba.version}</version>
  102.         </dependency>
  103.         <dependency>
  104.             <groupId>mysql</groupId>
  105.             <artifactId>mysql-connector-java</artifactId>
  106.             <version>${mysql.version}</version>
  107.         </dependency>
  108.  
  109.         <dependency>
  110.             <groupId>junit</groupId>
  111.             <artifactId>junit</artifactId>
  112.             <version>4.12</version>
  113.             <scope>test</scope>
  114.         </dependency>
  115.     </dependencies>
  116. </project>

在/src/main/resources下新建jdbc.properties/mybatis-config.xml/spring-config.xml配置文件：

jdbc.properties

  1. #jdbc settings
  2. jdbc.driver=com.mysql.cj.jdbc.Driver
  3. jdbc.url=jdbc:mysql://localhost:3306/mydb?useUnicode=true&characterEncoding=utf8&serverTimezone=GMT%2B8&useSSL=false
  4. jdbc.username=root
  5. jdbc.password=123456
  6.  
  7. #pool settings
  8. jdbc.pool.init=1
  9. jdbc.pool.minIdle=3
  10. jdbc.pool.maxActive=20
  11.  
  12. #jdbc.testSql=SELECT 'x'
  13. jdbc.testSql=SELECT 'x' FROM DUAL

mybatis-config.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>
  6.     <!--配置全局属性-->
  7.     <settings>
  8.         <!-- 打开延迟加载的开关 -->
  9.         <setting name="lazyLoadingEnabled" value="true"/>
  10.         <!-- 将积极加载改为消极加载（即按需加载） -->
  11.         <setting name="aggressiveLazyLoading" value="false"/>
  12.         <!-- 打开全局缓存开关（二级缓存）默认值就是 true -->
  13.         <setting name="cacheEnabled" value="true"/>
  14.         <!--使用jdbc的getGeneratekeys获取自增主键值-->
  15.         <setting name="useGeneratedKeys" value="true"/>
  16.         <!--使用列别名替换别名　　默认true select name as title form table; -->
  17.         <setting name="useColumnLabel" value="true"/>
  18.         <!--开启驼峰命名转换-->
  19.         <setting name="mapUnderscoreToCamelCase" value="true"/>
  20.         <!--打印sql日志-->
  21.         <setting name="logImpl" value="STDOUT_LOGGING" />
  22.     </settings>
  23.  
  24.     <!-- 引用db.properties配置文件 -->
  25.     <!--
  26.     <properties resource="db.properties"/>
  27.     <typeAliases>
  28.         <package name="com.dx.test.model"/>
  29.     </typeAliases>
  30.     -->
  31.  
  32.     <!-- 元素类型为 "configuration" 的内容必须匹配 "(properties?,settings?,typeAliases?,typeHandlers?,objectFactory?,objectWrapperFactory?,reflectorFactory?,plugins?,environments?,databaseIdProvider?,mappers?)"。-->
  33.     <typeHandlers>
  34.         <typeHandler handler="org.apache.ibatis.type.EnumOrdinalTypeHandler" javaType="com.dx.test.model.enums.ModuleType"/>
  35.         <typeHandler handler="org.apache.ibatis.type.EnumOrdinalTypeHandler" javaType="com.dx.test.model.enums.OperateType"/>
  36.         <typeHandler handler="org.apache.ibatis.type.EnumOrdinalTypeHandler" javaType="com.dx.test.model.enums.DataStatus"/>
  37.     </typeHandlers>
  38.  
  39.     <!-- 对事务的管理和连接池的配置 -->
  40.     <!--
  41.     <environments default="mysql_jdbc">
  42.         <environment id="oracle_jdbc">
  43.             <transactionManager type="JDBC"/>
  44.             <dataSource type="POOLED">
  45.                 <property name="driver" value="${driver}"/>
  46.                 <property name="url" value="${url}"/>
  47.                 <property name="username" value="${name}"/>
  48.                 <property name="password" value="${password}"/>
  49.             </dataSource>
  50.         </environment>
  51.  
  52.         <environment id="mysql_jdbc">
  53.             <transactionManager type="JDBC"/>
  54.             <dataSource type="POOLED">
  55.                 <property name="driver" value="${driver}"/>
  56.                 <property name="url" value="${url}"/>
  57.                 <property name="username" value="${name}"/>
  58.                 <property name="password" value="${password}"/>
  59.             </dataSource>
  60.         </environment>
  61.     </environments>
  62.     -->
  63.  
  64.     <!-- 当使用了xxxMapper.xml时，需要配置这些配置 -->
  65.     <!--
  66.     <mappers>
  67.         <mapper resource="resources/mapper/TaskAutoExecutePlanMapper.xml"/>
  68.     </mappers>
  69.     -->
  70.     <!-- 因在Mapper类上加入了@Mapper注解，因此这个配置也不需要了。 -->
  71.     <!--
  72.     <mappers>
  73.         <mapper class="com.dx.test.mapper.ArticleCategoryMapper"></mapper>
  74.         <mapper class="com.dx.test.mapper.ArticleMapper"></mapper>
  75.     </mappers>
  76.      -->
  77. </configuration>

spring-config.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.     xsi:schemaLocation="http://www.springframework.org/schema/beans
  6.  http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
  7.  http://www.springframework.org/schema/context
  8.  http://www.springframework.org/schema/context/spring-context-4.0.xsd ">
  9.  
  10.     <!-- bean annotation driven -->
  11.     <context:annotation-config />
  12.     <context:component-scan base-package="com.dx.test.repository,com.dx.test.mapper,com.dx.test.service" />
  13.  
  14.     <!-- 配置整合Mybatis过程 -->
  15.     <!-- 配置数据库相关参数 properties的属性：${url} -->
  16.     <context:property-placeholder location="classpath:jdbc.properties" />
  17.     <!--
  18.     <bean id="propertyPlaceholderConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
  19.         <property name="locations">
  20.          <list>
  21.           <value>classpath:jdbc.properties</value>
  22.          </list>
  23.         </property>
  24.     </bean>
  25.     -->
  26.  
  27.     <!--2.配置连接池属性 -->
  28.     <!-- 数据源配置, 使用 Druid 数据库连接池 -->
  29.     <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">
  30.         <!-- 数据源驱动类可不写，Druid默认会自动根据URL识别DriverClass -->
  31.         <property name="driverClassName" value="${jdbc.driver}" />
  32.  
  33.         <!-- 基本属性 url、user、password -->
  34.         <property name="url" value="${jdbc.url}" />
  35.         <property name="username" value="${jdbc.username}" />
  36.         <property name="password" value="${jdbc.password}" />
  37.  
  38.         <!-- 配置初始化大小、最小、最大 -->
  39.         <property name="initialSize" value="${jdbc.pool.init}" />
  40.         <property name="minIdle" value="${jdbc.pool.minIdle}" />
  41.         <property name="maxActive" value="${jdbc.pool.maxActive}" />
  42.  
  43.         <!-- 配置获取连接等待超时的时间 -->
  44.         <property name="maxWait" value="60000" />
  45.  
  46.         <!-- 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒 -->
  47.         <property name="timeBetweenEvictionRunsMillis" value="60000" />
  48.  
  49.         <!-- 配置一个连接在池中最小生存的时间，单位是毫秒 -->
  50.         <property name="minEvictableIdleTimeMillis" value="300000" />
  51.  
  52.         <property name="validationQuery" value="${jdbc.testSql}" />
  53.         <property name="testWhileIdle" value="true" />
  54.         <property name="testOnBorrow" value="false" />
  55.         <property name="testOnReturn" value="false" />
  56.         <!-- 打开PSCache，并且指定每个连接上PSCache的大小（Oracle使用） -->
  57.         <!-- <property name="poolPreparedStatements" value="true"/> <property name="maxPoolPreparedStatementPerConnectionSize"
  58.             value="20"/> -->
  59.         <!-- 配置监控统计拦截的filters: 监控统计用的filter:stat 日志用的filter:log4j 防御sql注入的filter:wall -->
  60.         <property name="filters" value="stat,wall" />
  61.     </bean>
  62.  
  63.     <!--3.配置SqlSessionFactory对象 -->
  64.     <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
  65.         <!--注入数据库连接池 -->
  66.         <property name="dataSource" ref="dataSource" />
  67.         <!--配置mybatis全局配置文件:mybatis-config.xml -->
  68.         <property name="configLocation"
  69.             value="classpath:mybatis-config.xml" />
  70.         <!-- 因为我们这采用的是Mybatis Java API方式，因此不需要配置 -->
  71.         <!--扫描entity包,使用别名,多个用;隔开 -->
  72.         <!-- <property name="typeAliasesPackage" value="com.dx.test.model"/> -->
  73.         <!--扫描sql配置文件:mapper需要的xml文件 -->
  74.         <!-- <property name="mapperLocations" value="classpath:mapper/*.xml"/> -->
  75.     </bean>
  76.  
  77.     <!-- Mapper接口所在包名，Spring会自动查找其下的类 -->
  78.     <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
  79.         <property name="basePackage" value="com.dx.test.mapper" />
  80.         <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
  81.     </bean>
  82.  
  83.     <!-- 如果想对单个mapper类关联上sqlSessionFactory，可以这么使用，具体参考：http://mybatis.org/spring/getting-started.html -->
  84.     <!-- <bean id="articlerMapper" class="org.mybatis.spring.mapper.MapperFactoryBean">
  85.         <property name="mapperInterface" value="com.dx.test.dao.mapper.ArticleMapper"
  86.         /> <property name="sqlSessionFactory" ref="sqlSessionFactory" /> </bean> -->
  87.  
  88.     <!-- (事务管理)transaction manager, use JtaTransactionManager for global tx -->
  89.     <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
  90.         <property name="dataSource" ref="dataSource" />
  91.     </bean>
  92. </beans>

在src/main/java/com.dx.test.module.enum包下新建DataStatus枚举类：

  1. package com.dx.test.model.enums;
  2.  
  3. public enum DataStatus {
  4.     Living(0), // 启用
  5.     UnUsed(1); // 作废
  6.  
  7.     private int value;
  8.  
  9.     DataStatus(int value) {
  10.         this.value = value;
  11.     }
  12.  
  13.     public int getValue() {
  14.         return this.value;
  15.     }
  16. }

在src/main/java/com.dx.test.model包下创建Log.java实体类：

  1. package com.dx.test.model;
  2.  
  3. import java.util.Date;
  4.  
  5. import com.dx.test.model.enums.DataStatus;
  6.  
  7. /**
  8.  * 文章分类
  9.  * */
  10. public class ArticleCategory {
  11.     private Integer id; //文章分类id
  12.     private String title; // 文章分类名称
  13.     private String imgSrc; // 文章分类banner图片
  14.     private String description; // 文章分类描述
  15.     private DataStatus state; // 记录状态
  16.  
  17.     private String createUser; // 新建用户
  18.     private String createUserId;// 新建用户id
  19.     private Date createTime; // 新建时间
  20.     private String updateUser; // 修改用户
  21.     private String updateUserId;// 修改用户id
  22.     private Date updateTime; // 修改时间
  23.     private Integer version; // 乐观锁版本号
  24.  
  25.     public Integer getId() {
  26.         return id;
  27.     }
  28.     public void setId(Integer id) {
  29.         this.id = id;
  30.     }
  31.     public String getTitle() {
  32.         return title;
  33.     }
  34.     public void setTitle(String title) {
  35.         this.title = title;
  36.     }
  37.     public String getImgSrc() {
  38.         return imgSrc;
  39.     }
  40.     public void setImgSrc(String imgSrc) {
  41.         this.imgSrc = imgSrc;
  42.     }
  43.     public String getDescription() {
  44.         return description;
  45.     }
  46.     public void setDescription(String description) {
  47.         this.description = description;
  48.     }
  49.     public DataStatus getState() {
  50.         return state;
  51.     }
  52.     public void setState(DataStatus state) {
  53.         this.state = state;
  54.     }
  55.     public String getCreateUser() {
  56.         return createUser;
  57.     }
  58.     public void setCreateUser(String createUser) {
  59.         this.createUser = createUser;
  60.     }
  61.     public String getCreateUserId() {
  62.         return createUserId;
  63.     }
  64.     public void setCreateUserId(String createUserId) {
  65.         this.createUserId = createUserId;
  66.     }
  67.     public Date getCreateTime() {
  68.         return createTime;
  69.     }
  70.     public void setCreateTime(Date createTime) {
  71.         this.createTime = createTime;
  72.     }
  73.     public String getUpdateUser() {
  74.         return updateUser;
  75.     }
  76.     public void setUpdateUser(String updateUser) {
  77.         this.updateUser = updateUser;
  78.     }
  79.     public String getUpdateUserId() {
  80.         return updateUserId;
  81.     }
  82.     public void setUpdateUserId(String updateUserId) {
  83.         this.updateUserId = updateUserId;
  84.     }
  85.     public Date getUpdateTime() {
  86.         return updateTime;
  87.     }
  88.     public void setUpdateTime(Date updateTime) {
  89.         this.updateTime = updateTime;
  90.     }
  91.     public Integer getVersion() {
  92.         return version;
  93.     }
  94.     public void setVersion(Integer version) {
  95.         this.version = version;
  96.     }
  97.     @Override
  98.     public String toString() {
  99.         return "ArticleCategory [id=" + id + ", title=" + title + ", imgSrc=" + imgSrc + ", description=" + description
  100.                 + "]";
  101.     }
  102. }

在src/main/java/com.dx.test.mapper包下新建ArticleCategoryMapper.java mapper接口，目前该接口内容为空，在接口上添加上@Mapper注解。

  1. package com.dx.test.mapper;
  2. import org.apache.ibatis.annotations.Mapper;
  3.  
  4. public interface ArticleCategoryMapper{
  5.  
  6. }

在src/main/java/com.dx.test.mapper.sqlprovider下新建ArticleCategorySqlProvider.java mapper sql生成类：

  1. package com.dx.test.mapper.sqlprovider;
  2.  
  3. public class ArticleCategorySqlProvider {
  4.  
  5. }

在src/main/test/com.dx.test下新建测试类ArticleCategoryTest.java

  1. package com.dx.test;
  2.  
  3. import org.junit.runner.RunWith;
  4. import org.springframework.beans.factory.annotation.Autowired;
  5. import org.springframework.test.context.ContextConfiguration;
  6. import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
  7.  
  8. import com.dx.test.mapper.ArticleCategoryMapper;
  9.  
  10. /**
  11.  * Unit test for simple App.
  12.  */
  13. @RunWith(SpringJUnit4ClassRunner.class)
  14. @ContextConfiguration({ "classpath:spring-config.xml" })
  15. public class ArticleCategroyTest {
  16.     @Autowired
  17.     private ArticleCategoryMapper articleCategoryMapper;
  18.  
  19. }

2）查询、批量查询

在mapper类中新建查询、批量查询接口：

  1.     /**
  2.      * +根据文章分类id,查询文件分类详情
  3.      * @param id 文章分类id
  4.      * @return 查询到的文章分类详情
  5.      * */
  6.     @Options(useCache = true, flushCache = Options.FlushCachePolicy.FALSE, timeout = 60000)
  7.     @Results(id="articleCategoryResult",value = {
  8.             @Result(property = "id",column = "id",id = true),
  9.             @Result(property = "title",column = "title"),
  10.             @Result(property = "imgSrc",column = "img_src"),
  11.             @Result(property = "status",column = "status",javaType = DataStatus.class),
  12.             @Result(property = "description",column = "description"),
  13.             @Result(property = "createUser",column = "create_user"),
  14.             @Result(property = "createUserId",column = "create_user_id"),
  15.             @Result(property = "createTime",column = "create_time"),
  16.             @Result(property = "updateUser",column = "update_user"),
  17.             @Result(property = "updateUserId",column = "update_user_id"),
  18.             @Result(property = "updateTime",column = "update_time"),
  19.             @Result(property = "version",column = "version")
  20.     })
  21.     @Select("select * from article_category where id=#{id}")
  22.     ArticleCategory getById(Integer id);
  23.  
  24.     /**
  25.      * 根据id列表，查询多个文章分类，返回文章分类列表
  26.      *
  27.      * @param list 查询id列表
  28.      * @return returnResult
  29.      * */
  30.     @Options(useCache = true, flushCache = Options.FlushCachePolicy.FALSE, timeout = 60000)
  31.     @ResultMap(value ="articleCategoryResult")
  32.     @SelectProvider(type = ArticleCategorySqlProvider.class, method = "getByIds")
  33.     List<ArticleCategory> getByIds(@Param("list") List<Integer> list);
  34.  
  35.     /**
  36.      * 根据过滤条件，查询返回满足条件的文章分类id列表
  37.      *
  38.      * @param articleCategory 查询条件
  39.      * @return returnResult
  40.      * */
  41.     @Options(useCache = true, flushCache = Options.FlushCachePolicy.FALSE, timeout = 60000)
  42.     @Select(value="select * from `article_category` where state=#{state} and `title` like CONCAT(CONCAT('%', #{title}), '%')")
  43.     List<Integer> getIdsByCondition(ArticleCategory articleCategory);
  44.  
  45.     /**
  46.      * +根据查询条件，查询记录。
  47.      * @param articleCategory 查询条件
  48.      * @return 返回查询结果
  49.      * */
  50.     @Options(useCache = true, flushCache = Options.FlushCachePolicy.FALSE, timeout = 60000)
  51.     @ResultMap(value ="articleCategoryResult")
  52.     @SelectProvider(type = ArticleCategorySqlProvider.class, method = "queryList")
  53.     List<ArticleCategory> queryList(ArticleCategory articleCategory);
  54.  
  55.     /**
  56.      * +根据查询条件，查询记录。
  57.      * @param articleCategory 查询条件
  58.      * @return 返回查询结果
  59.      * */
  60.     @Options(useCache = true, flushCache = Options.FlushCachePolicy.FALSE, timeout = 60000)
  61.     @ResultMap(value ="articleCategoryResult")
  62.     @Select(value="select * from `article_category` where state=#{state}")
  63.     List<ArticleCategory> queryListByState(DataStatus state);

查询返回Map的用法：

  1.     /**
  2.      * +根据查询条件，查询记录。
  3.      *
  4.      * @param articleCategory 查询条件
  5.      * @return 返回查询结果
  6.      */
  7.     @Options(useCache = true, flushCache = Options.FlushCachePolicy.FALSE, timeout = 60000)
  8.     @ResultType(value = HashMap.class)
  9.     @MapKey(value="id")
  10.     @Select(value = "select * from `article_category` where state=#{state}")
  11.     Map<Integer, ArticleCategory> getIdVsModelMap(DataStatus state);
  12.  
  13.     /**
  14.      * +根据查询条件，查询记录。
  15.      *
  16.      * @param articleCategory 查询条件
  17.      * @return 返回查询结果
  18.      */
  19.     @Options(useCache = true, flushCache = Options.FlushCachePolicy.FALSE, timeout = 60000)
  20.     @ResultType(value = HashMap.class)
  21. //    @Results(id="idVsTitleMapResult",
  22. //        value= {
  23. //            @Result(property = "key",column = "id"),
  24. //            @Result(property = "value",column = "title")
  25. //        }
  26. //    )
  27.     @Select(value = "select id,title from `article_category` where state=#{state}")
  28.     void getIdVsTitleMap(DataStatus state);
  29.  
  30.     /**
  31.      * 根据条件查询记录结果，返回Map{key:id,value:title}
  32.      * @param state 文章分类记录状态
  33.      * @return returnResult
  34.      * */
  35.     @Options(useCache = true, flushCache = Options.FlushCachePolicy.FALSE, timeout = 60000)
  36.     @ResultType(value = HashMap.class)
  37.     @Select(value = "select id,title from `article_category` where state=#{state}")
  38.     Map<Integer,String> getIdVsTitleMapWithResultHandler(@Param("state") DataStatus state, ResultHandler<?> resultHandler);

在mapper sql provider类中新建sql帮助方法：

  1.      /**
  2.      * +根据id集合，获取文章分类列表 SQL
  3.      *
  4.      * @param map map
  5.      * @return returnResult
  6.      */
  7.     public String getByIds(final Map<String, List<Integer>> map) {
  8.         List<Integer> tmpList = map.get("list");
  9.         if (tmpList == null || tmpList.isEmpty()) {
  10.             return null;
  11.         }
  12.  
  13.         StringBuilder sql = new StringBuilder("SELECT * FROM `article_category` WHERE `id` in (");
  14.         for (int i = 0; i < tmpList.size(); i++) {
  15.             sql.append("#{list[" + i + "]},");
  16.         }
  17.         sql.deleteCharAt(sql.length() - 1);
  18.         sql.append(")");
  19.         sql.append(";");
  20.  
  21.         return sql.toString();
  22.     }
  23.  
  24.     /**
  25.      * 根据查询条件，查询记录
  26.      *
  27.      * @param articleCategory 查询条件
  28.      * @return 返回查询结果
  29.      * */
  30.     public String queryList(ArticleCategory articleCategory) {
  31.         StringBuilder sql = new StringBuilder();
  32.         sql.append("select * from `article_category` where 1=1 ");
  33.  
  34.         if (articleCategory.getId() != null) {
  35.             sql.append(" AND `id`=#{id}");
  36.         }
  37.         if (articleCategory.getTitle() != null) {
  38.             sql.append("  AND `title` like CONCAT(CONCAT('%', #{title}), '%')");
  39.         }
  40.         if(articleCategory.getState()!=null) {
  41.             sql.append("  AND `state` = #{state}");
  42.         }
  43.         if (articleCategory.getCreateTime() != null) {
  44.             sql.append("  AND `create_time` = #{createTime}");
  45.         }
  46.         if (articleCategory.getCreateUser() != null) {
  47.             sql.append("  AND `create_user` = #{createUser}");
  48.         }
  49.         if (articleCategory.getCreateUserId() != null) {
  50.             sql.append("  AND `create_user_id` = #{createUserId}");
  51.         }
  52.         if (articleCategory.getUpdateTime() != null) {
  53.             sql.append("  AND `update_time` = #{updateTime}");
  54.         }
  55.         if (articleCategory.getUpdateUser() != null) {
  56.             sql.append("  AND `update_user` = #{updateUser}");
  57.         }
  58.         if (articleCategory.getUpdateUserId() != null) {
  59.             sql.append("  AND `update_user_id` = #{updateUserId}");
  60.         }
  61.         if (articleCategory.getVersion() != null) {
  62.             sql.append("  AND `version` = #{version}");
  63.         }
  64.         sql.append("  ORDER BY `id` DESC");
  65.  
  66.         return sql.toString();
  67.     }

在测试类中新增测试方法：

  1.     private ArticleCategory articleCategory;
  2.     private final String title = "category test title";
  3.     private final String titleNew = "category test title new";
  4.  
  5.     @Test
  6.     public void testGetById() {
  7.         ArticleCategory articleCategory = this.articleCategoryMapper.getById(this.articleCategory.getId());
  8.         Assert.assertEquals(articleCategory.getId(), this.articleCategory.getId());
  9.         Assert.assertEquals(articleCategory.getTitle(), this.title);
  10.     }
  11.  
  12.     @Test
  13.     public void testGetByIds() {
  14.         List<Integer> idList = new ArrayList<Integer>(Arrays.asList(5, 6));
  15.         List<ArticleCategory> queryList = this.articleCategoryMapper.getByIds(idList);
  16.         Assert.assertEquals(queryList.size(), idList.size());
  17.     }
  18.  
  19.     @Test
  20.     public void testGetIdsByCondition() {
  21.         ArticleCategory articleCategory = new ArticleCategory();
  22.         articleCategory.setState(DataStatus.Living);
  23.         articleCategory.setTitle("test");
  24.  
  25.         List<Integer> idList = this.articleCategoryMapper.getIdsByCondition(articleCategory);
  26.         Assert.assertTrue(idList.isEmpty() == false);
  27.     }
  28.  
  29.     @Test
  30.     public void testGetLivingIds() {
  31.         List<ArticleCategory> articleCategoryList=this.articleCategoryMapper.queryListByState(DataStatus.Living);
  32.         Assert.assertTrue(articleCategoryList.isEmpty() == false);
  33.     }
  34.  
  35.     @Test
  36.     public void testQueryList() {
  37.         ArticleCategory queryArticleCategory = new ArticleCategory();
  38.         queryArticleCategory.setTitle("test");
  39.  
  40.         List<ArticleCategory> queryResultList = this.articleCategoryMapper.queryList(queryArticleCategory);
  41.         Assert.assertFalse(queryResultList.size() == 0);
  42.     }

map测试代码：

  1.     @Test
  2.     public void testGetIdVsModelMap() {
  3.         Map<Integer,ArticleCategory> queryItems=this.articleCategoryMapper.getIdVsModelMap(DataStatus.Living);
  4.         Assert.assertTrue(queryItems.size()>0);
  5.     }
  6.  
  7.     @Autowired
  8.     private SqlSessionFactory sqlSessionFactory;
  9.  
  10.     @Test
  11.     public void testGetIdVsTitleMap() {
  12.         MapResultHandler mapResultHandler=new MapResultHandler();
  13.         this.sqlSessionFactory.openSession().select("com.dx.test.mapper.ArticleCategoryMapper.getIdVsTitleMap", DataStatus.Living,mapResultHandler);
  14.         @SuppressWarnings("unchecked")
  15.         Map<Integer, String> queryMap=mapResultHandler.getMappedResults();
  16.  
  17.         Assert.assertTrue(queryMap.size()>0);
  18.     }
  19.  
  20.     @Test
  21.     public void testGetIdVsTitleMapWithResultHandler() {
  22.         MapResultHandler mapResultHandler=new MapResultHandler();
  23.         this.articleCategoryMapper.getIdVsTitleMapWithResultHandler(DataStatus.Living, mapResultHandler);
  24.         Assert.assertTrue(mapResultHandler.getMappedResults().size()>0);
  25.     }

注意：上边返回map的用法中，如果是非Map<Integer,Model>的模式时，需要使用ResultHandler来辅助实现：

  1. package com.dx.test.mapper.resulthandlers;
  2.  
  3. import java.util.HashMap;
  4. import java.util.Map;
  5.  
  6. import org.apache.ibatis.session.ResultContext;
  7. import org.apache.ibatis.session.ResultHandler;
  8.  
  9. public class MapResultHandler implements ResultHandler {
  10.     private final Map mappedResults = new HashMap();
  11.  
  12.     @Override
  13.     public void handleResult(ResultContext context) {
  14.         @SuppressWarnings("rawtypes")
  15.         Map map = (Map) context.getResultObject();
  16.         mappedResults.put(map.get("key"), map.get("value"));
  17.     }
  18.  
  19.     public Map getMappedResults() {
  20.         return mappedResults;
  21.     }
  22. }

3）新增、批量新增

在mapper类中新建查询、批量查询接口：

  1.     /**
  2.      * +入库文章分类
  3.      *
  4.      * @param articleCategory 待入库实体
  5.      * @return 影响条数
  6.      */
  7.     @Options(useCache = true, flushCache = Options.FlushCachePolicy.TRUE, useGeneratedKeys = true, keyProperty = "id", keyColumn = "id")
  8.     @InsertProvider(type = ArticleCategorySqlProvider.class, method = "insert")
  9.     int insert(ArticleCategory articleCategory);
  10.      /**
  11.      * +批量添加记录
  12.      *
  13.      * @param articleCategoryList 文章分类列表
  14.      * @return returnResult
  15.      */
  16.     @Options(useCache = true, flushCache = Options.FlushCachePolicy.TRUE, useGeneratedKeys = true, keyProperty = "id", keyColumn = "id")
  17.     @InsertProvider(type = ArticleCategorySqlProvider.class, method = "batchInsert")
  18.     int batchInserts(@Param("list") final List<ArticleCategory> articleCategoryList);
  19.  
  20.     /**
  21.      * +批量添加记录
  22.      *
  23.      * @param articleCategoryList 文章分类列表
  24.      * @return returnResult
  25.      */
  26.     @Options(useCache = true, flushCache = Options.FlushCachePolicy.TRUE, useGeneratedKeys = true, keyProperty = "id", keyColumn = "id")
  27.     @Insert(value = "<script>"
  28.             + "INSERT INTO `article_category`"
  29.             + "(`title`,`img_src`,`description`,`state`,`create_time`,`create_user`,`create_user_id`,`update_time`,`update_user`,`update_user_id`,`version`)"
  30.             + "VALUES"
  31.             + "<foreach collection=\"list\" item=\"item\" index=\"index\" separator=\",\">"
  32.             + "     (#{item.title},#{item.imgSrc},#{item.description},#{item.state},now(),#{item.createUser},#{item.createUserId},now(),#{item.updateUser},#{item.updateUserId},0)"
  33.             + "</foreach>"
  34.             + "ON DUPLICATE KEY UPDATE `update_time` = now()"
  35.             + "</script>")
  36.     int batchInsertsWithScript(@Param("list") final List<ArticleCategory> articleCategoryList);

在mapper sql provider类中新建sql帮助方法：

  1.     /**
  2.      * 生成插入文章分类的SQL
  3.      *
  4.      * @param articleCategory文章分类
  5.      * @return 返回插入文章SQL
  6.      */
  7.     public String insert(ArticleCategory articleCategory) {
  8.         return new SQL() {
  9.             {
  10.                 INSERT_INTO("article_category");
  11.                 INTO_COLUMNS("title", "img_src", "description","state", "create_user", "create_user_id", "create_time","update_user", "update_user_id", "update_time", "version");
  12.                 INTO_VALUES("#{title}", "#{imgSrc}", "#{description}", "#{state}", "#{createUser}", "#{createUserId}", "now()","#{updateUser}", "#{updateUserId}", "now()", "0");
  13.             }
  14.         }.toString();
  15.     }
  16.  
  17.     /**
  18.      * 生成批量新增SQL
  19.      *
  20.      * @param map 参数信息
  21.      * @return 生成批量插入SQL语句
  22.      * */
  23.     public String batchInsert(Map<String, List<ArticleCategory>> map) {
  24.         List<ArticleCategory> tmpList = map.get("list");
  25.         if (tmpList == null || tmpList.isEmpty()) {
  26.             return null;
  27.         }
  28.  
  29.         StringBuilder sql = new StringBuilder("");
  30.         sql.append("INSERT INTO `article_category`");
  31.         sql.append("(`title`,`img_src`,`description`,`state`,`create_time`,`create_user`,`create_user_id`,`update_time`,`update_user`,`update_user_id`,`version`)");
  32.         sql.append("VALUES");
  33.         for (int i = 0; i < tmpList.size(); i++) {
  34.             sql.append("(#{list[" + i + "].title},#{list[" + i + "].imgSrc},#{list[" + i + "].description},#{list["+i+"].state},now(),#{list[" + i + "].createUser},#{list[" + i + "].createUserId},now(),#{list[" + i + "].updateUser},#{list[" + i + "].updateUserId},0),");
  35.         }
  36.         sql.deleteCharAt(sql.length() - 1);
  37.         sql.append(" ON DUPLICATE KEY UPDATE `update_time` = now()");
  38.         sql.append(";");
  39.  
  40.         return sql.toString();
  41.     }

在测试类中新增测试方法：

  1.     @Test
  2.     public void testInsert() {
  3.         ArticleCategory articleCategory = new ArticleCategory();
  4.         articleCategory.setTitle(title);
  5.         articleCategory.setDescription("category description");
  6.         articleCategory.setImgSrc("http://www.test.com/img/category/img-" + new Random().nextInt(1000) + ".gif");
  7.         articleCategory.setState(DataStatus.Living);
  8.         articleCategory.setCreateTime(new Date());
  9.         articleCategory.setCreateUser("create user");
  10.         articleCategory.setCreateUserId("user-" + new Random().nextInt(1000));
  11.  
  12.         int result = this.articleCategoryMapper.insert(articleCategory);
  13.         this.articleCategory = articleCategory;
  14.         Assert.assertEquals(result, 1);
  15.     }
  16.  
  17.     @Test
  18.     public void testBatchInsert() {
  19.         List<ArticleCategory> articleCategoryList = new ArrayList<ArticleCategory>();
  20.         for (int i = 0; i < 10; i++) {
  21.             ArticleCategory articleCategory = new ArticleCategory();
  22.             articleCategory.setTitle(title + i);
  23.             articleCategory.setState(DataStatus.Living);
  24.             articleCategory.setDescription("category description");
  25.             articleCategory.setImgSrc("http://www.test.com/img/category/img-" + new Random().nextInt(1000) + ".gif");
  26.             articleCategory.setCreateTime(new Date());
  27.             articleCategory.setCreateUser("create user");
  28.             articleCategory.setCreateUserId("user-" + new Random().nextInt(1000));
  29.  
  30.             articleCategoryList.add(articleCategory);
  31.         }
  32.  
  33.         int result = this.articleCategoryMapper.batchInserts(articleCategoryList);
  34.         Assert.assertEquals(result, 10);
  35.     }
  36.  
  37.     @Test
  38.     public void testBatchInsertWithScript() {
  39.         List<ArticleCategory> articleCategoryList = new ArrayList<ArticleCategory>();
  40.         for (int i = 0; i < 10; i++) {
  41.             ArticleCategory articleCategory = new ArticleCategory();
  42.             articleCategory.setTitle(title + i);
  43.             articleCategory.setState(DataStatus.Living);
  44.             articleCategory.setDescription("category description");
  45.             articleCategory.setImgSrc("http://www.test.com/img/category/img-" + new Random().nextInt(1000) + ".gif");
  46.             articleCategory.setCreateTime(new Date());
  47.             articleCategory.setCreateUser("create user");
  48.             articleCategory.setCreateUserId("user-" + new Random().nextInt(1000));
  49.  
  50.             articleCategoryList.add(articleCategory);
  51.         }
  52.  
  53.         int result = this.articleCategoryMapper.batchInsertsWithScript(articleCategoryList);
  54.         Assert.assertEquals(result, 10);
  55.     }

4）修改、批量修改

在mapper类中新建查询、批量查询接口：

  1.     /**
  2.      * +根据文章id，删除文章
  3.      *
  4.      * @param id 文章id
  5.      * @return 影响条数
  6.      */
  7.     @Options(useCache = true, flushCache = Options.FlushCachePolicy.TRUE)
  8.     @UpdateProvider(type = ArticleCategorySqlProvider.class, method = "update")
  9.     int update(ArticleCategory articleCategory);
  10.  
  11.     /**
  12.      * +批量新增
  13.      * @param articleCategoryList 待修改对象
  14.      * @return 影响条数
  15.      * */
  16.     @Options(useCache = true, flushCache = Options.FlushCachePolicy.TRUE)
  17.     @UpdateProvider(type = ArticleCategorySqlProvider.class, method = "batchUpdate")
  18.     int batchUpdate(List<ArticleCategory> articleCategoryList);
  19.  
  20.     /**
  21.      * +批量新增
  22.      * @param articleCategoryList 待修改对象
  23.      * @return 影响条数
  24.      * */
  25.     @Options(useCache = true, flushCache = Options.FlushCachePolicy.TRUE)
  26.     @Update(value="<script>"
  27.             + "<foreach item=\"item\" collection=\"list\" open=\"\" separator=\";\" close=\"\">"
  28.             + "update `article_category` "
  29.             + "<set>" +
  30.             " `id`=#{item.id} "
  31.             + " <if test='item.title !=null and item.title != \"\"'>" +
  32.             "       ,`title` = #{item.title} " +
  33.             "  </if> " +
  34.             " <if test='item.imgSrc !=null'>" +
  35.             "       ,`img_src` = #{item.imgSrc} " +
  36.             "  </if> " +
  37.             " <if test='item.description !=null and item.description != \"\"'>" +
  38.             "       ,`description` = #{item.description} " +
  39.             "  </if> " +
  40.             " <if test='item.state !=null'>" +
  41.             "       ,`state` = #{item.state} " +
  42.             "  </if> " +
  43.             ",`update_time` = now(), `update_user` = #{item.updateUser}, `update_user_id` = #{item.updateUserId}, `version` = `version` + 1 "
  44.             + "</set>"
  45.             + "where `id` = #{item.id} and `version`=#{item.version}"
  46.             + "</foreach>"
  47.             + "</script>")
  48.     int batchUpdateWithScript(List<ArticleCategory> articleCategoryList);

在mapper sql provider类中新建sql帮助方法：

  1.     /**
  2.      * 生成修改文章分类SQL
  3.      *
  4.      * @param articleCategory 文章分类实体
  5.      * @return 返回修改文章分类SQL
  6.      */
  7.     public String update(ArticleCategory articleCategory) {
  8.         StringBuilder sql = new StringBuilder();
  9.  
  10.         sql.append("update `article_category` set id=#{id}");
  11.         if (articleCategory.getTitle() != null) {
  12.             sql.append(", `title`=#{title}");
  13.         }
  14.         if (articleCategory.getImgSrc() != null) {
  15.             sql.append(", `img_src`=#{imgSrc}");
  16.         }
  17.         if (articleCategory.getDescription() != null) {
  18.             sql.append(", `description`=#{description}");
  19.         }
  20.         if(articleCategory.getState()!=null) {
  21.             sql.append(", `state` = #{state}");
  22.         }
  23.         if (articleCategory.getCreateUser() != null) {
  24.             sql.append(", `create_user` = #{createUser}");
  25.         }
  26.         if (articleCategory.getCreateUserId() != null) {
  27.             sql.append(", `create_user_id` = #{createUserId}");
  28.         }
  29.         sql.append(", `update_time` = now()");
  30.         if (articleCategory.getUpdateUser() != null) {
  31.             sql.append(", `update_user` = #{updateUser}");
  32.         }
  33.         if (articleCategory.getUpdateUserId() != null) {
  34.             sql.append(", `update_user_id` = #{updateUserId}");
  35.         }
  36.  
  37.         sql.append(", `version` = `version` + 1");
  38.         sql.append(" WHERE `id` = #{id} AND `version` = #{version}");
  39.  
  40.         return sql.toString();
  41.     }
  42.  
  43.     /**
  44.      * 生成批量更新SQL
  45.      *
  46.      * @param map 查询参数
  47.      * @return 返回生成的批量更新语句
  48.      * */
  49.     public String batchUpdate(Map<String, List<ArticleCategory>> map) {
  50.         List<ArticleCategory> tmpList = map.get("list");
  51.         if (tmpList == null || tmpList.isEmpty()) {
  52.             return null;
  53.         }
  54.  
  55.         StringBuilder sql = new StringBuilder("");
  56.  
  57.         for (int i = 0; i < tmpList.size(); i++) {
  58.             ArticleCategory articleCategory=tmpList.get(i);
  59.             sql.append("update `article_category` set id=#{list["+i+"].id}");
  60.             if (articleCategory.getTitle() != null) {
  61.                 sql.append(", `title`=#{list["+i+"].title}");
  62.             }
  63.             if (articleCategory.getImgSrc() != null) {
  64.                 sql.append(", `img_src`=#{list["+i+"].imgSrc}");
  65.             }
  66.             if (articleCategory.getDescription() != null) {
  67.                 sql.append(", `description`=#{list["+i+"].description}");
  68.             }
  69.             if(articleCategory.getState()!=null) {
  70.                 sql.append(", `state` = #{list["+i+"].state}");
  71.             }
  72.             if (articleCategory.getCreateUser() != null) {
  73.                 sql.append(", `create_user` = #{list["+i+"].createUser}");
  74.             }
  75.             if (articleCategory.getCreateUserId() != null) {
  76.                 sql.append(", `create_user_id` = #{list["+i+"].createUserId}");
  77.             }
  78.             sql.append(", `update_time` = now()");
  79.             if (articleCategory.getUpdateUser() != null) {
  80.                 sql.append(", `update_user` = #{list["+i+"].updateUser}");
  81.             }
  82.             if (articleCategory.getUpdateUserId() != null) {
  83.                 sql.append(", `update_user_id` = #{list["+i+"].updateUserId}");
  84.             }
  85.  
  86.             sql.append(", `version` = `version` + 1");
  87.             sql.append(" WHERE `id` = #{list["+i+"].id} AND `version` = #{list["+i+"].version}");
  88.             sql.append(";");
  89.         }
  90.  
  91.         return sql.toString();
  92.     }

在测试类中新增测试方法：

  1.     @Test
  2.     public void testUpdate() {
  3.         ArticleCategory articleCategory = this.articleCategoryMapper.getById(this.articleCategory.getId());
  4.         Assert.assertEquals(articleCategory.getId(), this.articleCategory.getId());
  5.         Assert.assertEquals(articleCategory.getTitle(), this.title);
  6.  
  7.         articleCategory.setTitle(this.titleNew);
  8.         int result = this.articleCategoryMapper.update(articleCategory);
  9.         Assert.assertEquals(result, 1);
  10.  
  11.         articleCategory = this.articleCategoryMapper.getById(this.articleCategory.getId());
  12.         Assert.assertEquals(articleCategory.getId(), this.articleCategory.getId());
  13.         Assert.assertEquals(articleCategory.getTitle(), this.title);
  14.     }
  15.  
  16.     @Test
  17.     public void testBatchUpdate() {
  18.         ArticleCategory queryArticleCategory = new ArticleCategory();
  19.         queryArticleCategory.setTitle("ccccc");
  20.         List<ArticleCategory> queryItems = this.articleCategoryMapper.queryList(queryArticleCategory);
  21.         for (ArticleCategory articleCategory : queryItems) {
  22.             articleCategory.setTitle("DDD");
  23.         }
  24.  
  25.         int result = this.articleCategoryMapper.batchUpdate(queryItems);
  26.         Assert.assertEquals(result, 1);
  27.     }
  28.  
  29.     @Test
  30.     public void testBatchUpdateWithScript() {
  31.         ArticleCategory queryArticleCategory = new ArticleCategory();
  32.         queryArticleCategory.setTitle("DDD");
  33.         List<ArticleCategory> queryItems = this.articleCategoryMapper.queryList(queryArticleCategory);
  34.         for (ArticleCategory articleCategory : queryItems) {
  35.             articleCategory.setTitle("ccccc");
  36.         }
  37.  
  38.         int result = this.articleCategoryMapper.batchUpdateWithScript(queryItems);
  39.         Assert.assertEquals(result, 1);
  40.     }

测试执行批量插入，按照上边jdbc.properties和spring-config.xml配置中会抛出以下异常：

  1. Caused by: java.sql.SQLException: sql injection violation, multi-statement not allow : update `article_category` set id=?, `title`=?, `img_src`=?, `description`=?, `state` = ?, `create_user` = ?, `create_user_id` = ?, `update_time` = now(), `version` = `version` + 1 WHERE `id` = ? AND `version` = ?;update `article_category` set id=?, `title`=?, `img_src`=?, `description`=?, `state` = ?, `create_user` = ?, `create_user_id` = ?, `update_time` = now(), `version` = `version` + 1 WHERE `id` = ? AND `version` = ?;update `article_category` set id=?, `title`=?, `img_src`=?, `description`=?, `state` = ?, `create_user` = ?, `create_user_id` = ?, `update_time` = now(), `version` = `version` + 1 WHERE `id` = ? AND `version` = ?;update `article_category` set id=?, `title`=?, `img_src`=?, `description`=?, `state` = ?, `create_user` = ?, `create_user_id` = ?, `update_time` = now(), `version` = `version` + 1 WHERE `id` = ? AND `version` = ?;
  2.     at com.alibaba.druid.wall.WallFilter.checkInternal(WallFilter.java:808)
  3.     at com.alibaba.druid.wall.WallFilter.connection_prepareStatement(WallFilter.java:294)
  4.     at com.alibaba.druid.filter.FilterChainImpl.connection_prepareStatement(FilterChainImpl.java:610)
  5.     at com.alibaba.druid.filter.FilterAdapter.connection_prepareStatement(FilterAdapter.java:943)
  6.     at com.alibaba.druid.filter.FilterEventAdapter.connection_prepareStatement(FilterEventAdapter.java:143)
  7.     at com.alibaba.druid.filter.FilterChainImpl.connection_prepareStatement(FilterChainImpl.java:610)
  8.     at com.alibaba.druid.proxy.jdbc.ConnectionProxyImpl.prepareStatement(ConnectionProxyImpl.java:374)
  9.     at com.alibaba.druid.pool.DruidPooledConnection.prepareStatement(DruidPooledConnection.java:388)
  10.     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  11.     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
  12.     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  13.     at java.lang.reflect.Method.invoke(Method.java:498)
  14.     at org.apache.ibatis.logging.jdbc.ConnectionLogger.invoke(ConnectionLogger.java:55)
  15.     at com.sun.proxy.$Proxy38.prepareStatement(Unknown Source)
  16.     at org.apache.ibatis.executor.statement.PreparedStatementHandler.instantiateStatement(PreparedStatementHandler.java:85)
  17.     at org.apache.ibatis.executor.statement.BaseStatementHandler.prepare(BaseStatementHandler.java:88)
  18.     at org.apache.ibatis.executor.statement.RoutingStatementHandler.prepare(RoutingStatementHandler.java:59)
  19.     at org.apache.ibatis.executor.SimpleExecutor.prepareStatement(SimpleExecutor.java:85)
  20.     at org.apache.ibatis.executor.SimpleExecutor.doUpdate(SimpleExecutor.java:49)
  21.     at org.apache.ibatis.executor.BaseExecutor.update(BaseExecutor.java:117)
  22.     at org.apache.ibatis.executor.CachingExecutor.update(CachingExecutor.java:76)
  23.     at org.apache.ibatis.session.defaults.DefaultSqlSession.update(DefaultSqlSession.java:198)
  24.     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  25.     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
  26.     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  27.     at java.lang.reflect.Method.invoke(Method.java:498)
  28.     at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:426)
  29.     ... 37 more

此时出现错误原因，多个sql语句执行被过滤器过滤掉了。

问题解决：

1）需要在jdbc.properties中url中添加allowMultiQueries=true

  1. #jdbc settings
  2. jdbc.driver=com.mysql.cj.jdbc.Driver
  3. jdbc.url=jdbc:mysql://localhost:3306/mydb?allowMultiQueries=true&useUnicode=true&characterEncoding=utf8&serverTimezone=GMT%2B8&useSSL=false
  4. jdbc.username=root
  5. jdbc.password=123456
  6.  
  7. #pool settings
  8. jdbc.pool.init=1
  9. jdbc.pool.minIdle=3
  10. jdbc.pool.maxActive=20
  11.  
  12. #jdbc.testSql=SELECT 'x'
  13. jdbc.testSql=SELECT 'x' FROM DUAL

2）在spring-config.xml中修改，添加wall-filter/stat-filter，并引入dataSource下。

  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.     xsi:schemaLocation="http://www.springframework.org/schema/beans
  6.  http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
  7.  http://www.springframework.org/schema/context
  8.  http://www.springframework.org/schema/context/spring-context-4.0.xsd ">
  9.  
  10.     <!-- bean annotation driven -->
  11.     <context:annotation-config />
  12.     <context:component-scan base-package="com.dx.test.repository,com.dx.test.mapper,com.dx.test.service" />
  13.  
  14.     <!-- 配置整合Mybatis过程 -->
  15.     <!-- 配置数据库相关参数 properties的属性：${url} -->
  16.     <context:property-placeholder location="classpath:jdbc.properties" />
  17.     <!--
  18.     <bean id="propertyPlaceholderConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
  19.         <property name="locations">
  20.          <list>
  21.           <value>classpath:jdbc.properties</value>
  22.          </list>
  23.         </property>
  24.     </bean>
  25.     -->
  26.  
  27.     <!--2.配置连接池属性 -->
  28.     <!-- 数据源配置, 使用 Druid 数据库连接池 -->
  29.     <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">
  30.         <!-- 数据源驱动类可不写，Druid默认会自动根据URL识别DriverClass -->
  31.         <property name="driverClassName" value="${jdbc.driver}" />
  32.  
  33.         <!-- 基本属性 url、user、password -->
  34.         <property name="url" value="${jdbc.url}" />
  35.         <property name="username" value="${jdbc.username}" />
  36.         <property name="password" value="${jdbc.password}" />
  37.  
  38.         <!-- 配置初始化大小、最小、最大 -->
  39.         <property name="initialSize" value="${jdbc.pool.init}" />
  40.         <property name="minIdle" value="${jdbc.pool.minIdle}" />
  41.         <property name="maxActive" value="${jdbc.pool.maxActive}" />
  42.  
  43.         <!-- 配置获取连接等待超时的时间 -->
  44.         <property name="maxWait" value="60000" />
  45.  
  46.         <!-- 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒 -->
  47.         <property name="timeBetweenEvictionRunsMillis" value="60000" />
  48.  
  49.         <!-- 配置一个连接在池中最小生存的时间，单位是毫秒 -->
  50.         <property name="minEvictableIdleTimeMillis" value="300000" />
  51.  
  52.         <property name="validationQuery" value="${jdbc.testSql}" />
  53.         <property name="testWhileIdle" value="true" />
  54.         <property name="testOnBorrow" value="false" />
  55.         <property name="testOnReturn" value="false" />
  56.         <!-- 打开PSCache，并且指定每个连接上PSCache的大小（Oracle使用） -->
  57.         <!-- <property name="poolPreparedStatements" value="true"/> <property name="maxPoolPreparedStatementPerConnectionSize"
  58.             value="20"/> -->
  59.         <property name="proxyFilters">
  60.             <list>
  61.                 <ref bean="stat-filter" />
  62.                 <ref bean="wall-filter" />
  63.             </list>
  64.         </property>
  65.         <!-- 配置监控统计拦截的filters: 监控统计用的filter:stat 日志用的filter:log4j 防御sql注入的filter:wall -->
  66.         <property name="filters" value="stat,wall" />
  67.     </bean>
  68.     <bean id="stat-filter" class="com.alibaba.druid.filter.stat.StatFilter">
  69.         <property name="slowSqlMillis" value="30000" />
  70.         <property name="logSlowSql" value="true" />
  71.         <property name="mergeSql" value="true" />
  72.     </bean>
  74.     <bean id="wall-filter" class="com.alibaba.druid.wall.WallFilter">
  75.         <property name="dbType" value="mysql" />
  76.         <property name="config" ref="wall-config" />
  77.     </bean>
  79.     <bean id="wall-config" class="com.alibaba.druid.wall.WallConfig">
  80.         <!-- 批量sql -->
  81.         <property name="multiStatementAllow" value="true" />
  82.     </bean>
  83.  
  84.     <!--3.配置SqlSessionFactory对象 -->
  85.     <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
  86.         <!--注入数据库连接池 -->
  87.         <property name="dataSource" ref="dataSource" />
  88.         <!--配置mybatis全局配置文件:mybatis-config.xml -->
  89.         <property name="configLocation"
  90.             value="classpath:mybatis-config.xml" />
  91.         <!-- 因为我们这采用的是Mybatis Java API方式，因此不需要配置 -->
  92.         <!--扫描entity包,使用别名,多个用;隔开 -->
  93.         <!-- <property name="typeAliasesPackage" value="com.dx.test.model"/> -->
  94.         <!--扫描sql配置文件:mapper需要的xml文件 -->
  95.         <!-- <property name="mapperLocations" value="classpath:mapper/*.xml"/> -->
  96.     </bean>
  97.  
  98.     <!-- Mapper接口所在包名，Spring会自动查找其下的类 -->
  99.     <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
  100.         <property name="basePackage" value="com.dx.test.mapper" />
  101.         <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
  102.     </bean>
  103.  
  104.     <!-- 如果想对单个mapper类关联上sqlSessionFactory，可以这么使用，具体参考：http://mybatis.org/spring/getting-started.html -->
  105.     <!-- <bean id="articlerMapper" class="org.mybatis.spring.mapper.MapperFactoryBean">
  106.         <property name="mapperInterface" value="com.dx.test.dao.mapper.ArticleMapper"
  107.         /> <property name="sqlSessionFactory" ref="sqlSessionFactory" /> </bean> -->
  108.  
  109.     <!-- (事务管理)transaction manager, use JtaTransactionManager for global tx -->
  110.     <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
  111.         <property name="dataSource" ref="dataSource" />
  112.     </bean>
  113. </beans>

上边加粗本分是要修改的部分。

5）删除、批量删除

在mapper类中新建查询、批量查询接口：

  1.     /**
  2.      * +根据文章分类id，删除文章分类
  3.      *
  4.      * @param id 文章分类id
  5.      * @return 影响条数
  6.      */
  7.     @Options(useCache = true, flushCache = Options.FlushCachePolicy.TRUE)
  8.     @Delete("delete from article_category where id=#{id}")
  9.     int delete(Integer id);
  10.  
  11.     /**
  12.      * +根据文章分类id集合，删除文章分类
  13.      *
  14.      * @param list 文章分类id集合
  15.      * @return 影响条数
  16.      */
  17.     @Options(useCache = true, flushCache = Options.FlushCachePolicy.TRUE)
  18.     @DeleteProvider(type = ArticleCategorySqlProvider.class, method = "batchDelete")
  19.     int batchDelete(@Param("list") List<Integer> list);
  20.  
  21.     /**
  22.      * +批量删除记录
  23.      *
  24.      * @param list 待删除id集合
  25.      * @return returnResult
  26.      */
  27.     @Options(useCache = true, flushCache = Options.FlushCachePolicy.TRUE)
  28.     @Delete("<script>" +
  29.             "delete from `article_category` where `id` in " +
  30.             "<foreach collection=\"list\" index=\"i\" open=\"(\" separator=\",\" close=\")\" item=\"item\"  >" +
  31.             "#{item}" +
  32.             "</foreach>" +
  33.             "</script>")
  34.     int batchDeleteWithScript(@Param("list") List<Integer> list);

在mapper sql provider类中新建sql帮助方法：

  1.    /**
  2.     * +根据id集合，获取文章分类列表 SQL
  3.     *
  4.     * @param map map
  5.     * @return returnResult
  6.     */
  7.    public String batchDelete(final Map<String, List<Integer>> map) {
  8.        List<Integer> tmpList = map.get("list");
  9.        if (tmpList == null || tmpList.isEmpty()) {
  10.            return null;
  11.        }
  12.  
  13.        StringBuilder sql = new StringBuilder("DELETE FROM `article_category` WHERE `id` in (");
  14.        for (int i = 0; i < tmpList.size(); i++) {
  15.            sql.append("#{list[" + i + "]},");
  16.        }
  17.        sql.deleteCharAt(sql.length() - 1);
  18.        sql.append(")");
  19.        sql.append(";");
  20.  
  21.        return sql.toString();
  22.    }

在测试类中新增测试方法：

  1.     @Test
  2.     public void testDelete() {
  3.         int result = this.articleCategoryMapper.delete(this.articleCategory.getId());
  4.         Assert.assertEquals(result, 1);
  5.     }
  6.  
  7.     @Test
  8.     public void testBatchDelete() {
  9.         List<Integer> idList = new ArrayList<Integer>(Arrays.asList(1, 2));
  10.         int result = this.articleCategoryMapper.batchDelete(idList);
  11.         Assert.assertEquals(result, idList.size());
  12.     }
  13.  
  14.     @Test
  15.     public void testBatchDeleteWithScript() {
  16.         List<Integer> idList = new ArrayList<Integer>(Arrays.asList(3, 4));
  17.         int result = this.articleCategoryMapper.batchDeleteWithScript(idList);
  18.         Assert.assertEquals(result, idList.size());
  19.     }

参考《MyBatis与Druid数据库连接池集成监控统计后WallFilterSQL注入异常问题处理方案》


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