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：

    "jdbc.properties"/>


     "dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
       "driverClassName" value="${driver}"/>
       "url" value="${url}"/>
       "username" value="${username}"/>
       "password" value="${password}"/>
       "initialSize" value="${initialSize}"/>
       "maxActive" value="${maxActive}"/>
       "maxIdle" value="${maxIdle}"/>
       "minIdle" value="${minIdle}"/>



     "sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
     "dataSource" ref="dataSource" />



     "userMapper" class="org.mybatis.spring.mapper.MapperFactoryBean">
     "mapperInterface" value="com.xxt.ibatis.dbcp.dao.UserMapper" />
     "sqlSessionFactory" ref="sqlSessionFactory" />


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

 
  （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);
}

  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);
}

   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());
     }
 }

  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：

lt;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/**/*.xml"/>  -->
lt;/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:

"com.xxt.ibatis.dbcp.domain.User">
     "User" id="userMap">
        "id" column="id" />
        "name" column="name" />
        "password" column="password" />
        "createTime" column="createtime" />

     "getUser" parameterType="User" resultMap="userMap">
       select * from user where id = #{id}

     
        
        
        
        
     
     
       select * from user where id = #{id}
     

 
    (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;
   }
 }

  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:

"sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
   "dataSource" ref="dataSource" />
   "configLocation"  value="classpath:sqlMapConfig.xml"/>



 "sqlSession"     class="org.mybatis.spring.SqlSessionTemplate">
      "0" ref="sqlSessionFactory" />


"userDaoImpl3" class="com.xxt.ibatis.dbcp.dao.impl.UserDaoImpl3">

   "sqlSessionTemplate" ref="sqlSession" />

 
   (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);
  }
}