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-placeholderlocation="jdbc.properties"/>

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

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

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

<beanid="userDaoImpl2"class="com.xxt.ibatis.dbcp.dao.impl.UserDaoImpl2">
<propertyname="userMapper"ref="userMapper"/>
</bean>

     <!-- 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:

publicinterfaceUserMapper{
@Select("SELECT*FROMuserWHEREid=#{userId}")
UsergetUser(@Param("userId")longid);
}

  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：

publicinterfaceUserDao{
publicUsergetUserById(Useruser);
}

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

(4)dao实现类UserDaoImpl2,，代码如下:

publicclassUserDaoImpl2implementsUserDao{
privateUserMapperuserMapper;

publicvoidsetUserMapper(UserMapperuserMapper){
this.userMapper=userMapper;
}

publicUsergetUserById(Useruser){
returnuserMapper.getUser(user.getId());
}
}

  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-->
lt;beanid="sqlSessionFactory"class="org.mybatis.spring.SqlSessionFactoryBean">
<propertyname="dataSource"ref="dataSource"/>
<!--指定sqlMapConfig总配置文件，订制的environment在spring容器中不在生效-->
<propertyname="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-->
<!--<propertyname="mapperLocations"value="classpath*:com/xxt/ibatis/dbcp/**/*.xml"/>-->
lt;/bean>

    <!-- 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>
<typeAliastype="com.xxt.ibatis.dbcp.domain.User"alias="User"/>
</typeAliases>
<mappers>
<mapperresource="com/xxt/ibatis/dbcp/domain/user.map.xml"/>
</mappers>
</configuration>

<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:

<mappernamespace="com.xxt.ibatis.dbcp.domain.User">
<resultMaptype="User"id="userMap">
<idproperty="id"column="id"/>
<resultproperty="name"column="name"/>
<resultproperty="password"column="password"/>
<resultproperty="createTime"column="createtime"/>
</resultMap>
<selectid="getUser"parameterType="User"resultMap="userMap">
select*fromuserwhereid=#{id}
</select>
<mapper/>

<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：

publicclassUserDaoImplimplementsUserDao{
publicSqlSessionTemplatesqlSession;
publicUsergetUserById(Useruser){
return(User)sqlSession.selectOne("com.xxt.ibatis.dbcp.domain.User.getUser",user);
}
publicvoidsetSqlSession(SqlSessionTemplatesqlSession){
this.sqlSession=sqlSession;
}
}

  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:

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

<beanid="sqlSession"class="org.mybatis.spring.SqlSessionTemplate">
<constructor-argindex="0"ref="sqlSessionFactory"/>
</bean>

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

<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：

publicclassUserDaoImpl3extendsSqlSessionDaoSupportimplementsUserDao{
publicUsergetUserById(Useruser){
return(User)getSqlSession().selectOne("com.xxt.ibatis.dbcp.domain.User.getUser",user);
}
}