spring与mybatis三种调整方法

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：Java代码

1. ????<!--?引入jdbc配置文件?--> ??
2. ????<context:property-placeholder?location="jdbc.properties"/>? ??
3. ??
4. ?????<!--创建jdbc数据源?--> ??
5. ?????<bean?id="dataSource"?class="org.apache.commons.dbcp.BasicDataSource"?destroy-method="close"> ??
6. ???????<property?name="driverClassName"?value="${driver}"/> ??
7. ???????<property?name="url"?value="${url}"/> ??
8. ???????<property?name="username"?value="${username}"/> ??
9. ???????<property?name="password"?value="${password}"/> ??
10. ???????<property?name="initialSize"?value="${initialSize}"/> ??
11. ???????<property?name="maxActive"?value="${maxActive}"/> ??
12. ???????<property?name="maxIdle"?value="${maxIdle}"/> ??
13. ???????<property?name="minIdle"?value="${minIdle}"/> ??
14. ?????</bean> ??
15. ??
16. ?????<!--?创建SqlSessionFactory，同时指定数据源--> ??
17. ?????<bean?id="sqlSessionFactory"?class="org.mybatis.spring.SqlSessionFactoryBean">? ??
18. ?????<property?name="dataSource"?ref="dataSource"?/>? ??
19. ?????</bean>? ??
20. ??
21. ?????<!--创建数据映射器，数据映射器必须为接口--> ??
22. ?????<bean?id="userMapper"?class="org.mybatis.spring.mapper.MapperFactoryBean">? ??
23. ?????<property?name="mapperInterface"?value="com.xxt.ibatis.dbcp.dao.UserMapper"?/>? ??
24. ?????<property?name="sqlSessionFactory"?ref="sqlSessionFactory"?/>? ??
25. ?????</bean> ??
26. ??
27. ?????<bean?id="userDaoImpl2"?class="com.xxt.ibatis.dbcp.dao.impl.UserDaoImpl2"> ??
28. ?????<property?name="userMapper"?ref="userMapper"/> ??
29. </bean>??

view plain

1. ????<!--?引入jdbc配置文件?-->??
2. ????<context:property-placeholder?location="jdbc.properties"/>???
3. ??
4. ?????<!--创建jdbc数据源?-->??
5. ?????<bean?id="dataSource"?class="org.apache.commons.dbcp.BasicDataSource"?destroy-method="close">??
6. ???????<property?name="driverClassName"?value="${driver}"/>??
7. ???????<property?name="url"?value="${url}"/>??
8. ???????<property?name="username"?value="${username}"/>??
9. ???????<property?name="password"?value="${password}"/>??
10. ???????<property?name="initialSize"?value="${initialSize}"/>??
11. ???????<property?name="maxActive"?value="${maxActive}"/>??
12. ???????<property?name="maxIdle"?value="${maxIdle}"/>??
13. ???????<property?name="minIdle"?value="${minIdle}"/>??
14. ?????</bean>??
15. ??
16. ?????<!--?创建SqlSessionFactory，同时指定数据源-->??
17. ?????<bean?id="sqlSessionFactory"?class="org.mybatis.spring.SqlSessionFactoryBean">???
18. ?????<property?name="dataSource"?ref="dataSource"?/>???
19. ?????</bean>???
20. ??
21. ?????<!--创建数据映射器，数据映射器必须为接口-->??
22. ?????<bean?id="userMapper"?class="org.mybatis.spring.mapper.MapperFactoryBean">???
23. ?????<property?name="mapperInterface"?value="com.xxt.ibatis.dbcp.dao.UserMapper"?/>???
24. ?????<property?name="sqlSessionFactory"?ref="sqlSessionFactory"?/>???
25. ?????</bean>??
26. ??
27. ?????<bean?id="userDaoImpl2"?class="com.xxt.ibatis.dbcp.dao.impl.UserDaoImpl2">??
28. ?????<property?name="userMapper"?ref="userMapper"/>??
29. </bean>??

?
? （2）数据映射器UserMapper,代码如下:

Java代码

1. public?interface?UserMapper?{ ??
2. ??????@Select("SELECT?*?FROM?user?WHERE?id?=?#{userId}")? ??
3. ??????User?getUser(@Param("userId")?long?id);? ??
4. }??

view plain

1. public?interface?UserMapper?{??
2. ??????@Select("SELECT?*?FROM?user?WHERE?id?=?#{userId}")???
3. ??????User?getUser(@Param("userId")?long?id);???
4. }??

?
????(3)?dao接口类UserDao，代码如下：

Java代码

1. public?interface?UserDao?{ ??
2. ????public?User?getUserById(User?user); ??
3. }??

view plain

1. public?interface?UserDao?{??
2. ????public?User?getUserById(User?user);??
3. }??

?
???(4)dao实现类UserDaoImpl2,，代码如下:

Java代码

1. public?class?UserDaoImpl2?implements?UserDao?{ ??
2. ?????private?UserMapper?userMapper;? ??
3. ??
4. ?????public?void?setUserMapper(UserMapper?userMapper)?{? ??
5. ?????????this.userMapper?=?userMapper;? ??
6. ?????}?? ??
7. ??
8. ?????public?User?getUserById(User?user)?{ ??
9. ????????return?userMapper.getUser(user.getId());? ??
10. ?????} ??
11. ?}??

view plain

1. public?class?UserDaoImpl2?implements?UserDao?{??
2. ?????private?UserMapper?userMapper;???
3. ??
4. ?????public?void?setUserMapper(UserMapper?userMapper)?{???
5. ?????????this.userMapper?=?userMapper;???
6. ?????}????
7. ??
8. ?????public?User?getUserById(User?user)?{??
9. ????????return?userMapper.getUser(user.getId());???
10. ?????}??
11. ?}??

?
??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：

Xml代码

1. <!--?创建SqlSessionFactory，同时指定数据源-->??
2. lt;bean?id="sqlSessionFactory"?class="org.mybatis.spring.SqlSessionFactoryBean">? ??
3. ??<property?name="dataSource"?ref="dataSource"?/>? ??
4. ??<!--?指定sqlMapConfig总配置文件，订制的environment在spring容器中不在生效-->??
5. ??<property??name="configLocation"??value="classpath:sqlMapConfig.xml"/>??
6. ??<!--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?-->??
7. ??<!-?-?<property??name="mapperLocations"??value="classpath*:com/xxt/ibatis/dbcp/**/*.xml"/>??-->??
8. lt;/bean>???

view plain

1. <!--?创建SqlSessionFactory，同时指定数据源-->??
2. lt;bean?id="sqlSessionFactory"?class="org.mybatis.spring.SqlSessionFactoryBean">???
3. ??<property?name="dataSource"?ref="dataSource"?/>???
4. ??<!--?指定sqlMapConfig总配置文件，订制的environment在spring容器中不在生效-->??
5. ??<property??name="configLocation"??value="classpath:sqlMapConfig.xml"/>??
6. ??<!--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?-->??
7. ??<!-?-?<property??name="mapperLocations"??value="classpath*:com/xxt/ibatis/dbcp/**/*.xml"/>??-->??
8. lt;/bean>???

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

Xml代码

1. <configuration>??
2. ???<typeAliases>??
3. ?????<typeAlias?type="com.xxt.ibatis.dbcp.domain.User"?alias="User"?/>??
4. ??</typeAliases>??
5. ???<mappers>??
6. ??????<mapper?resource="com/xxt/ibatis/dbcp/domain/user.map.xml"?/>??
7. ?????</mappers>??
8. ?</configuration>??

view plain

1. <configuration>??
2. ???<typeAliases>??
3. ?????<typeAlias?type="com.xxt.ibatis.dbcp.domain.User"?alias="User"?/>??
4. ??</typeAliases>??
5. ???<mappers>??
6. ??????<mapper?resource="com/xxt/ibatis/dbcp/domain/user.map.xml"?/>??
7. ?????</mappers>??
8. ?</configuration>??

?
????(3)实体类映射文件user.map.xml:

Java代码

1. <mapper?namespace="com.xxt.ibatis.dbcp.domain.User"> ??
2. ?????<resultMap?type="User"?id="userMap"> ??
3. ????????<id?property="id"?column="id"?/> ??
4. ????????<result?property="name"?column="name"?/> ??
5. ????????<result?property="password"?column="password"?/> ??
6. ????????<result?property="createTime"?column="createtime"?/> ??
7. ?????</resultMap> ??
8. ?????<select?id="getUser"?parameterType="User"?resultMap="userMap"> ??
9. ???????select?*?from?user?where?id?=?#{id} ??
10. ?????</select> ??
11. <mapper/>??

view plain

1. <mapper?namespace="com.xxt.ibatis.dbcp.domain.User">??
2. ?????<resultMap?type="User"?id="userMap">??
3. ????????<id?property="id"?column="id"?/>??
4. ????????<result?property="name"?column="name"?/>??
5. ????????<result?property="password"?column="password"?/>??
6. ????????<result?property="createTime"?column="createtime"?/>??
7. ?????</resultMap>??
8. ?????<select?id="getUser"?parameterType="User"?resultMap="userMap">??
9. ???????select?*?from?user?where?id?=?#{id}??
10. ?????</select>??
11. <mapper/>??

?
????(4)dao层接口实现类UserDaoImpl：

Java代码

1. public?class?UserDaoImpl?implements??UserDao??{ ??
2. ???public?SqlSessionTemplate?sqlSession; ??
3. ???public?User?getUserById(User?user)?{ ??
4. ???????return?(User)sqlSession.selectOne("com.xxt.ibatis.dbcp.domain.User.getUser",?user); ??
5. ???} ??
6. ???public?void?setSqlSession(SqlSessionTemplate?sqlSession)?{ ??
7. ????????this.sqlSession?=?sqlSession; ??
8. ???} ??
9. ?}??

view plain

1. public?class?UserDaoImpl?implements??UserDao??{??
2. ???public?SqlSessionTemplate?sqlSession;??
3. ???public?User?getUserById(User?user)?{??
4. ???????return?(User)sqlSession.selectOne("com.xxt.ibatis.dbcp.domain.User.getUser",?user);??
5. ???}??
6. ???public?void?setSqlSession(SqlSessionTemplate?sqlSession)?{??
7. ????????this.sqlSession?=?sqlSession;??
8. ???}??
9. ?}??

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

Java代码

1. <bean?id="sqlSessionFactory"?class="org.mybatis.spring.SqlSessionFactoryBean">? ??
2. ???<property?name="dataSource"?ref="dataSource"?/> ??
3. ???<property??name="configLocation"??value="classpath:sqlMapConfig.xml"/> ??
4. ???<!--?<property??name="mapperLocations"??value="classpath*:com/xxt/ibatis/dbcp/domain/user.map.xml"/???>??--> ??
5. </bean> ??
6. ??
7. ?<bean?id="sqlSession"?????class="org.mybatis.spring.SqlSessionTemplate">? ??
8. ??????<constructor-arg?index="0"?ref="sqlSessionFactory"?/>? ??
9. </bean> ??
10. ??
11. <bean?id="userDaoImpl3"?class="com.xxt.ibatis.dbcp.dao.impl.UserDaoImpl3"> ??
12. ???<!--注入SqlSessionTemplate实例?--> ??
13. ???<property?name="sqlSessionTemplate"?ref="sqlSession"?/>? ??
14. ???<!--也可直接注入SqlSessionFactory实例，二者都指定时，SqlSessionFactory失效?--> ??
15. ???<!--?<property?name="sqlSessionFactory"?ref="sqlSessionFactory"?/>? ??
16. --> ??
17. </bean>??

view plain

1. <bean?id="sqlSessionFactory"?class="org.mybatis.spring.SqlSessionFactoryBean">???
2. ???<property?name="dataSource"?ref="dataSource"?/>??
3. ???<property??name="configLocation"??value="classpath:sqlMapConfig.xml"/>??
4. ???<!--?<property??name="mapperLocations"??value="classpath*:com/xxt/ibatis/dbcp/domain/user.map.xml"/???>??-->??
5. </bean>??
6. ??
7. ?<bean?id="sqlSession"?????class="org.mybatis.spring.SqlSessionTemplate">???
8. ??????<constructor-arg?index="0"?ref="sqlSessionFactory"?/>???
9. </bean>??
10. ??
11. <bean?id="userDaoImpl3"?class="com.xxt.ibatis.dbcp.dao.impl.UserDaoImpl3">??
12. ???<!--注入SqlSessionTemplate实例?-->??
13. ???<property?name="sqlSessionTemplate"?ref="sqlSession"?/>???
14. ???<!--也可直接注入SqlSessionFactory实例，二者都指定时，SqlSessionFactory失效?-->??
15. ???<!--?<property?name="sqlSessionFactory"?ref="sqlSessionFactory"?/>???
16. -->??
17. </bean>??

?
???(2)?dao层接口实现类UserDaoImpl3：

Java代码

1. public?class?UserDaoImpl3?extends?SqlSessionDaoSupport?implements?UserDao?{ ??
2. ??public?User?getUserById(User?user)?{ ??
3. ?????return?(User)?getSqlSession().selectOne("com.xxt.ibatis.dbcp.domain.User.getUser",?user); ??
4. ??} ??

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