spring与mybatis四种整合方法

最新推荐文章于 2023-05-10 01:56:02 发布

tata1618

最新推荐文章于 2023-05-10 01:56:02 发布

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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：

<context:property-placeholder location="jdbc.properties"/>

<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>

<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>

（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：

<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"/> -->
   </bean>

(2)mybatis总配置文件sqlMapConfig.xml：

(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:

(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);
}
}

3、采用org.mybatis.spring.mapper.MapperFactoryBean或者org.mybatis.spring.mapper.MapperScannerConfigurer

<beans:bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <beans:property name="dataSource" ref="simpleDataSource" />
        <beans:property name="configLocation"
            value="classpath:conf/core/mybatis-config.xml" />
    </beans:bean>

    <beans:bean id="sqlSessionFactory_contact" class="org.mybatis.spring.SqlSessionFactoryBean">
        <beans:property name="dataSource" ref="simpleDataSource_contact" />
        <beans:property name="configLocation"
            value="classpath:conf/core/mybatis-config-contact.xml" />
    </beans:bean>

    <beans:bean id="transactionManager"
        class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <beans:property name="dataSource" ref="simpleDataSource" />
    </beans:bean>

    <beans:bean id="transactionManager_contact"
        class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <beans:property name="dataSource" ref="simpleDataSource_contact" />
    </beans:bean>