本文主要介紹Spring與Mybatis三種常用整合方法，需要的整合架包是mybatis-spring.jar，可通過鏈接
http://code.google.com/p/mybatis/下載到。
1、采用數(shù)據(jù)映射器（MapperFactoryBean）的方式，不用寫mybatis映射文件，采用注解方式提供相應(yīng)的sql語句和輸入?yún)?shù)。
（1）Spring配置文件：
<!-- 引入jdbc配置文件 -->
<context:property-placeholder location="jdbc.properties"/>
<!--創(chuàng)建jdbc數(shù)據(jù)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>
<!-- 創(chuàng)建SqlSessionFactory，同時指定數(shù)據(jù)源-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
</bean>
<!--創(chuàng)建數(shù)據(jù)映射器，數(shù)據(jù)映射器必須為接口-->
<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>
數(shù)據(jù)映射器UserMapper,代碼如下:
public interface UserMapper {
@Select("SELECT * FROM user WHERE id = #{userId}")
User getUser(@Param("userId") long id);
}
dao接口類UserDao，代碼如下：
public interface UserDao {
public User getUserById(User user);
}
dao實現(xiàn)類UserDaoImpl2,，代碼如下:
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的實現(xiàn)類org.mybatis.spring.SqlSessionTemplate。
mybatis中, sessionFactory可由SqlSessionFactoryBuilder.來創(chuàng)建。
MyBatis-Spring 中，使用了SqlSessionFactoryBean來替代。
SqlSessionFactoryBean有一個必須屬性dataSource，
另外其還有一個通用屬性configLocation（用來指定mybatis的xml配置文件路徑）。
（1）Spring配置文件：
<!-- 創(chuàng)建SqlSessionFactory，同時指定數(shù)據(jù)源-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<!-- 指定sqlMapConfig總配置文件，訂制的environment在spring容器中不在生效-->
<property name="configLocation" value="classpath:sqlMapConfig.xml"/>
<!--指定實體類映射文件，可以指定同時指定某一包以及子包下面的所有配置文件，mapperLocations和configLocation有一個即可，當(dāng)需要為實體類指定別名時，可指定configLocation屬性，再在mybatis總配置文件中采用mapper引入實體類映射文件 -->
<!- - <property name="mapperLocations" value="classpath*:com/xxt/ibatis/dbcp/**/*.xml"/> -->
<bean>
(2)mybatis總配置文件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)實體類映射文件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層接口實現(xiàn)類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、采用抽象類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實例 -->
<property name="sqlSessionTemplate" ref="sqlSession" />
<!--也可直接注入SqlSessionFactory實例，二者都指定時，SqlSessionFactory失效 -->
<!-- <property name="sqlSessionFactory" ref="sqlSessionFactory" /> -->
</bean>
(2) dao層接口實現(xiàn)類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);
}
}