Spring-08-整合Mybatis

1、学习文档

学习文档

2、所需依赖

<dependency>
    <groupId>junit</groupId>
    <artifactId>junit</artifactId>
    <version>4.13</version>
    <scope>test</scope>
</dependency>
?
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>5.1.47</version>
</dependency>
?
<dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis</artifactId>
    <version>3.5.2</version>
</dependency>
?
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>5.1.9.RELEASE</version>
</dependency>
?
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-jdbc</artifactId>
    <version>5.1.9.RELEASE</version>
</dependency>
?
<dependency>
    <groupId>org.aspectj</groupId>
    <artifactId>aspectjweaver</artifactId>
    <version>1.9.5</version>
</dependency>
?
<dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis-spring</artifactId>
    <version>2.0.2</version>
</dependency>
?
<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
    <version>1.16.10</version>
</dependency>

3、配置文件

• spring-dao.xml

  <!--
      DataSource数据源配置
      sqlSessionFactory
      sqlSession
  -->
  ?
  <?xml version="1.0" encoding="UTF-8"?>
  <beans xmlns="http://www.springframework.org/schema/beans"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://www.springframework.org/schema/beans
          https://www.springframework.org/schema/beans/spring-beans.xsd">
  ?
      <!--DataSource数据源配置：使用Spring的数据源来替换Mybatis的配置-->
      <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
          <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
          <property name="url" value="jdbc:mysql://localhost:3306/mybatis?useSSL=true&amp;useUnicode=true&amp;characterEncoding=UTF-8"/>
          <property name="username" value="root"/>
          <property name="password" value="root"/>
      </bean>
  ?
      <!--sqlSessionFactory-->
      <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
          <property name="dataSource" ref="dataSource"/>
  ?
          <!--绑定Mybatis配置文件-->
          <property name="configLocation" value="classpath:mybatis-config.xml"/>
          <property name="mapperLocations" value="classpath:com/hmx/mapper/*.xml"/>
      </bean>
  ?
      <!--sqlSession-->
      <bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
          <constructor-arg index="0" ref="sqlSessionFactory"/>
      </bean>
  ?
  </beans>

• mybatis-config.xml

  <!--
      别名
      设置
  -->
  ?
  <?xml version="1.0" encoding="UTF-8" ?>
  <!DOCTYPE configuration
          PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
          "http://mybatis.org/dtd/mybatis-3-config.dtd">
  <!--configuration核心配置文件-->
  <configuration>
  ?
      <typeAliases>
          <typeAlias type="com.hmx.pojo.User"/>
      </typeAliases>
  ?
      <settings></settings>
  ?
  </configuration>

   

4、方式一

• applicationContext.xml

  <!--配置bean以及使用-->
  ?
  <?xml version="1.0" encoding="UTF-8"?>
  <beans xmlns="http://www.springframework.org/schema/beans"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://www.springframework.org/schema/beans
          https://www.springframework.org/schema/beans/spring-beans.xsd">
  ?
      <import resource="spring.xml"/>
  ?
      <bean id="userMapper" class="com.hmx.mapper.UserMapperImpl">
          <property name="sqlSessionTemplate" ref="sqlSession"></property>
      </bean>
  ?
  </beans>

• 实体类：User

  @Data
  public class User {
  ?
      private int id;
      private String name;
      private String pwd;
  }

• 接口类：UserMapper.java

  public interface UserMapper {
      public List<User> selectUser();
  }

• Mybatis的xml文件：UserMapper.xml

  <mapper namespace="com.hmx.mapper.UserMapper">
      <select id="selectUser" resultType="user">
          select * from mybatistest
      </select>
  </mapper>

• 接口类的实现类：UserMapperImpl.java

  public class UserMapperImpl implements UserMapper {
  ?
      //和之前不同，我们现在所有操作都使用SqlSessionTemplate来执行
      private SqlSessionTemplate sqlSessionTemplate;
  ?
      public void setSqlSessionTemplate(SqlSessionTemplate sqlSessionTemplate) {
          this.sqlSessionTemplate = sqlSessionTemplate;
      }
  ?
      public List<User> selectUser() {
          UserMapper mapper = sqlSessionTemplate.getMapper(UserMapper.class);
          return mapper.selectUser();
      }
  }

• 测试

  public static void selectTest() {
  
      ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
      UserMapper sqlSession = context.getBean("userMapper", UserMapper.class);
      for (User user : sqlSession.selectUser()) {
          System.out.println(user);
      }
  }

5、方式二

• applicationContext.xml

  <?xml version="1.0" encoding="UTF8"?>
  <beans xmlns="http://www.springframework.org/schema/beans"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://www.springframework.org/schema/beans
          https://www.springframework.org/schema/beans/spring-beans.xsd">
  
      <import resource="spring-dao.xml"/>
  
      <bean id="userMapper" class="com.hmx.mapper.UserMapperImpl">
          <property name="sqlSessionFactory" ref="sqlSessionFactory"/>
      </bean>
  
  </beans>

• 接口类的实现类：UserMapperImpl.java

  public class UserMapperImpl extends SqlSessionDaoSupport implements UserMapper {
      public List<User> selectUser() {
          return getSqlSession().getMapper(UserMapper.class).selectUser();
      }
  }

Spring-08-整合Mybatis

原文：https://www.cnblogs.com/LittleSkinny/p/13695181.html