Spring整合Mybatis

这个因为今天mybatis-spring官网进不了，也总结不出来什么，但是这个整合也没有什么，几乎就是代码吧。

1. 导入需要的包（junit，mybatis，mysql，spring相关，aop织入，mybatis-spring）

<!--导入mybatis依赖 -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.6</version>
        </dependency>

        <!--数据库驱动 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.23</version>
        </dependency>

        <!-- 测试-->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13.2</version>
        </dependency>

        <!--spring-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.3.6</version>
        </dependency>

        <!--spring操作数据库的话，还需要导入spring-jdbc -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.3.4</version>
        </dependency>

        <!-- AOP织入包-->
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.9.4</version>
        </dependency>

        <!--mybatis整合spring的包 -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>2.0.6</version>
        </dependency>

2. 将sqlsessionfactory配置到spring的bean中

<!-- 配置DataSource：使用spring的数据源替换mybatis的配置
    这里我们使用spring提供的JDBC：
    org.springframework.jdbc.datasource.DriverManagerDataSource
-->
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
    <property name="driverClassName" value="com.mysql.cj.jdbc.Driver"/>
    <property name="url" value="XXX"/>
    <property name="username" value="root"/>
    <property name="password" value="123456"/>
</bean>

<!-- 配置sqlSessionFactory-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    <property name="dataSource" ref="dataSource"/>
    <!-- 绑定mybatis文件-->
    <property name="configLocation" value="classpath:mybatis-config.xml"/>
</bean>

3. 将sqlSession配置到spring的bean中

<!--配置sqlSession
   SqlSessionTemplate:mybatis整合spring中的类，就相当于原来的sqlSession
 -->
<bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
    <constructor-arg index="0" ref="sqlSessionFactory"/>
</bean>

4. 测试

   • Teacher类

   public class Teacher {
       private int id;
       private String tname;
   }
   

   • 直接测试

   @Test
   public void test2(){
       ApplicationContext context = new ClassPathXmlApplicationContext("spring-config.xml");
       SqlSession sqlSession = (SqlSession) context.getBean("sqlSession");
       TeacherDao mapper = sqlSession.getMapper(TeacherDao.class);
       for (Teacher teacher : mapper.getAll()) {
           System.out.println(teacher);
       }
   }
   

   还有一种使用TeacherDao的实现类来完成

   • TeacherDaoImpl

   public class TeacherDaoImpl implements TeacherDao{
   
       private SqlSession sqlSession;
   
       public void setSqlSession(SqlSession sqlSession) {
           this.sqlSession = sqlSession;
       }
   
       @Override
       public List<Teacher> getAll() {
           return sqlSession.getMapper(TeacherDao.class).getAll();
       }
   }
   

   • 需要将这个实现类注册在spring容器中

   <bean id="impl" class="com.yxx.dao.TeacherDaoImpl">
       <property name="sqlSession" ref="sqlSession"/>
   </bean>
   

   • 测试

   @Test
   public void test3(){
       ApplicationContext context = new ClassPathXmlApplicationContext("spring-config.xml");
       TeacherDao impl = (TeacherDao) context.getBean("impl");
       for (Teacher teacher : impl.getAll()) {
           System.out.println(teacher);
       }
   }