spring与mybatis三种整合方法

本文主要介绍Spring与Mybatis三种常用整合方法,需要的整合架包是mybatis-spring.jar,可通过链接
http://code.google.com/p/mybatis/下载到。

  1、采用数据映射器(MapperFactoryBean)的方式,不用写mybatis映射文件,采用注解方式提供相应的sql语句和输入参数。
  (1)Spring配置文件:

     <!-- 引入jdbc配置文件 -->
     <context:property-placeholder location="jdbc.properties"/>

      <!--创建jdbc数据源 -->
      <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
        <property name="driverClassName" value="${driver}"/>
        <property name="url" value="${url}"/>
        <property name="username" value="${username}"/>
        <property name="password" value="${password}"/>
        <property name="initialSize" value="${initialSize}"/>
        <property name="maxActive" value="${maxActive}"/>
        <property name="maxIdle" value="${maxIdle}"/>
        <property name="minIdle" value="${minIdle}"/>
      </bean>

      <!-- 创建SqlSessionFactory,同时指定数据源-->
      <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
      <property name="dataSource" ref="dataSource" /> 
      </bean>

      <!--创建数据映射器,数据映射器必须为接口-->
      <bean id="userMapper" class="org.mybatis.spring.mapper.MapperFactoryBean"> 
      <property name="mapperInterface" value="com.xxt.ibatis.dbcp.dao.UserMapper" />
      <property name="sqlSessionFactory" ref="sqlSessionFactory" /> 
      </bean>

      <bean id="userDaoImpl2" class="com.xxt.ibatis.dbcp.dao.impl.UserDaoImpl2">
      <property name="userMapper" ref="userMapper"/>
 </bean>

 
(2)数据映射器UserMapper,代码如下:

  public interface UserMapper {
        @Select("SELECT * FROM user WHERE id = #{userId}") 
        User getUser(@Param("userId") long id); 
  }


 (3) dao接口类UserDao,代码如下:
 

  public interface UserDao {
       public User getUserById(User user);
   }


(4)dao实现类UserDaoImpl2,,代码如下:

  public class UserDaoImpl2 implements UserDao {
       private UserMapper userMapper;

       public void setUserMapper(UserMapper userMapper) { 
           this.userMapper = userMapper; 
       } 

       public User getUserById(User user) {
          return userMapper.getUser(user.getId()); 
       }
   }

 2、采用接口org.apache.ibatis.session.SqlSession的实现类org.mybatis.spring.SqlSessionTemplate。
    mybatis中, sessionFactory可由SqlSessionFactoryBuilder.来创建。MyBatis-Spring 中,使用了SqlSessionFactoryBean来替代。SqlSessionFactoryBean有一个必须属性dataSource,另外其还有一个通用属性configLocation(用来指定mybatis的xml配置文件路径)。
   (1)Spring配置文件:
 

   <!-- 创建SqlSessionFactory,同时指定数据源-->
   <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
      <property name="dataSource" ref="dataSource" /> 
      <!-- 指定sqlMapConfig总配置文件,订制的environment在spring容器中不在生效-->
      <property  name="configLocation"  value="classpath:sqlMapConfig.xml"/>
      <!--指定实体类映射文件,可以指定同时指定某一包以及子包下面的所有配置文件,mapperLocations和configLocation有一个即可,当需要为实体类指定别名时,可指定configLocation属性,再在mybatis总配置文件中采用mapper引入实体类映射文件 -->
      <!- - <property  name="mapperLocations"  value="classpath*:com/xxt/ibatis/dbcp/**/*.xml"/>  -->
   </bean>


    (2)mybatis总配置文件sqlMapConfig.xml:
 

 <configuration>
   <typeAliases>
     <typeAlias type="com.xxt.ibatis.dbcp.domain.User" alias="User" />
  </typeAliases>
   <mappers>
      <mapper resource="com/xxt/ibatis/dbcp/domain/user.map.xml" />
     </mappers>
 </configuration>


(3)实体类映射文件user.map.xml:

<mapper namespace="com.xxt.ibatis.dbcp.domain.User">
     <resultMap type="User" id="userMap">
        <id property="id" column="id" />
        <result property="name" column="name" />
        <result property="password" column="password" />
        <result property="createTime" column="createtime" />
     </resultMap>
     <select id="getUser" parameterType="User" resultMap="userMap">
       select * from user where id = #{id}
     </select>
<mapper/>


(4)dao层接口实现类UserDaoImpl:

  public class UserDaoImpl implements  UserDao  {
     public SqlSessionTemplate sqlSession;
     public User getUserById(User user) {
         return (User)sqlSession.selectOne("com.xxt.ibatis.dbcp.domain.User.getUser", user);
     }
     public void setSqlSession(SqlSessionTemplate sqlSession) {
          this.sqlSession = sqlSession;
     }
   }


 3、采用抽象类org.mybatis.spring.support.SqlSessionDaoSupport提供SqlSession。
   (1)spring配置文件:

<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
   <property name="dataSource" ref="dataSource" />
   <property  name="configLocation"  value="classpath:sqlMapConfig.xml"/>
   <!-- <property  name="mapperLocations"  value="classpath*:com/xxt/ibatis/dbcp/domain/user.map.xml"/   >  -->
</bean>

 <bean id="sqlSession"     class="org.mybatis.spring.SqlSessionTemplate"> 
      <constructor-arg index="0" ref="sqlSessionFactory" /> 
</bean>

<bean id="userDaoImpl3" class="com.xxt.ibatis.dbcp.dao.impl.UserDaoImpl3">
   <!--注入SqlSessionTemplate实例 -->
   <property name="sqlSessionTemplate" ref="sqlSession" /> 
   <!--也可直接注入SqlSessionFactory实例,二者都指定时,SqlSessionFactory失效 -->
   <!-- <property name="sqlSessionFactory" ref="sqlSessionFactory" /> 
-->
</bean>

 (2) dao层接口实现类UserDaoImpl3:
 

public class UserDaoImpl3 extends SqlSessionDaoSupport implements UserDao {   
  public User getUserById(User user) {   
     return (User) getSqlSession().selectOne("com.xxt.ibatis.dbcp.domain.User.getUser", user);  
  }   
}

 

© 版权声明
THE END
喜欢就支持一下吧
点赞0 分享