Spring-Mybatis

1. 导包

   <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
        </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>
        <!--Spring操作数据库的话，还需要一个spring-jdbc-->
        <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>1.8.13</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>1.18.10</version>
        </dependency>
    </dependencies>

2. 编写数据源配置

   <!--DataSource:使用Spring的数据源替换Mybatis的配置 c3p0 dbcp druid
   我们这里使用Spring提供的JDBC:org.springframework.jdbc.datasource
   -->
   <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"/>
    <property name="username" value="root"/>
    <property name="password" value="196840xrk"/>
   </bean>

3. 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/sunfl/mapper/*.xml"/>
   </bean>

4. sqlSessionTemplate

   <!--SqlSessionTemplate就是我们使用的sqlSession-->
   <bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
    <!--只能使用构造器注入sqlSessionFactory，因为它没有set方法-->
    <constructor-arg index="0" ref="sqlSessionFactory"/>
   </bean>

5. 需要给接口添加实现类

   public class UserMapperImpl implements UserMapper{
   
    //我们的所有操作，在原来都使用sqlSession来执行，现在都使用SqlSessionTemple
    private SqlSessionTemplate sqlSession;
   
    public void setSqlSession(SqlSessionTemplate sqlSession) {
        this.sqlSession = sqlSession;
    }
   
    public List<User> selectUser() {
        UserMapper mapper = sqlSession.getMapper(UserMapper.class);
        return mapper.selectUser();
    }
   }

6. 将自己写的实现类注入到spring中

   <bean id="userMapper" class="com.sunfl.mapper.UserMapperImpl">
    <property name="sqlSession" ref="sqlSession"/>
   </bean>

7. 测试使用

   ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
   UserMapper userMapper = context.getBean("userMapper", UserMapper.class);
   List<User> userList = userMapper.selectUser();
   for (User user : userList) {
    System.out.println(user);
   }