关于整合spring+mybatis 第三种方式-使用注解

使用注解

1.与前两种方法一致。不过稍许不同的是beans.xml中配置的差异。

<!-- 配置sqlSessionFactory -->

     <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">

         <property name="dataSource" ref="dataSource"></property>

         <property name="configLocation" value="classpath:com/bsss/conf/mybatis.xml"></property>

     </bean>

    <!-- id="userloginMapper"必须与services实现类中所声明的mapper变量名保持一致 -->

    <bean id="userloginMapper" class="org.mybatis.spring.mapper.MapperFactoryBean">

        <property name="mapperInterface" value="com.bsss.mapper.UserloginMapper"></property>

        <property name="sqlSessionFactory" ref="sqlSessionFactory"></property>

    </bean>

    <bean id="userServices" class="com.bsss.services.impl.UserLoginServicesImpl">

        <property name="userloginMapper" ref="userloginMapper"></property>

    </bean>

2. 增加Mapper接口

//Mapper接口

public interface UserloginMapper {

    //org.mybatis.spring.mapper.MapperFactoryBean

    @Select("select * from userlogin")

    public List<Userlogin> getUserlogin();

}

3. Services层接口和实现类

public interface UserLoginServices {

    public List<Userlogin> getUserLoginInfo();

}

public class UserLoginServicesImpl implements UserLoginServices {

    private UserloginMapper userloginMapper;//必须与beans.xml中mapper的bean id保持一致

    //必须有setter方法

    public void setUserloginMapper(UserloginMapper userloginMapper) {

        this.userloginMapper = userloginMapper;

    }

    @Override

    public List<Userlogin> getUserLoginInfo() {

        // TODO Auto-generated method stub

        return userloginMapper.getUserlogin();

    }

}

4. 测试类

public class Test {

    public static void main(String[] args) {

        ApplicationContext ac = new ClassPathXmlApplicationContext("com/bsss/conf/beans.xml");

        UserLoginServices uls = (UserLoginServices)ac.getBean("userServices");

        System.out.println(uls.getUserLoginInfo().size());

    }

}