- mybatis整合spring
a) 新建java项目
b) 导入jar包,特别需要注意导入mybatis 和 spring 的整合包
aopalliance.jar aspectjweaver.jar commons-logging-1.1.1.jar mybatis-3.2.7.jar mybatis-spring-1.2.3.jar mysql-connector-java-5.1.20-bin.jar spring-aop-4.1.6.RELEASE.jar spring-aspects-4.1.6.RELEASE.jar spring-beans-4.1.6.RELEASE.jar spring-context-4.1.6.RELEASE.jar spring-core-4.1.6.RELEASE.jar spring-expression-4.1.6.RELEASE.jar spring-jdbc-4.1.6.RELEASE.jar spring-tx-4.1.6.RELEASE.jar spring-web-4.1.6.RELEASE.jar spring-webmvc-4.1.6.RELEASE.jar
<configuration> <properties resource="db.properties"></properties> <settings> <setting name="cacheEnabled" value="true"/> </settings> <typeAliases> <package name="cn.wh.vo"/> </typeAliases> <mappers> <mapper resource="cn/wh/mapper/UserMapper.xml" /> </mappers> </configuration>
d) 编写vo:
public class User { private int id; private String name; private String pwd; public int getId() { return id; } public void setId(int id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getPwd() { return pwd; } public void setPwd(String pwd) { this.pwd = pwd; } }
e) 编写dao接口
public interface UserDao { public List<User> findAll(); }
f) 编写mapper映射文件
<mapper namespace="cn.wh.mapper.UserMapper"> <select id="findAll" resultType="User"> select * from t_user </select> </mapper>
g) 编写dao的实现类
public class UserDaoImpl implements UserDao{ private SqlSession sqlSession; public void setSqlSession(SqlSession sqlSession) { this.sqlSession = sqlSession; } @Override public List<User> findAll() { return sqlSession.selectList("cn.wh.mapper.UserMapper.findAll"); } }
h) 编写service接口及其实现类
public class UserServiceImpl implements UserService{ private UserDao userDao; public void setUserDao(UserDao userDao) { this.userDao = userDao; } @Override public List<User> findAll() { return userDao.findAll(); } }
i) 编写spring的配置文件
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> <property name="driverClassName" value="com.mysql.jdbc.Driver"/> <property name="url" value="jdbc:mysql:///test"/> <property name="username" value="root"/> <property name="password" value="1111"/> </bean> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource"/> <property name="configLocation" value="classpath:mybatis.cfg.xml"/> </bean> <bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate"> <constructor-arg index="0" ref="sqlSessionFactory"></constructor-arg> </bean> <!-- 配置声明式事务 --> <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource"></property> </bean> <!-- 配置事务通知 --> <tx:advice id="txAdvice" transaction-manager="txManager"> <tx:attributes> <!-- 表示以save开头的方法都需要事务 propagation 表示事务的传播特性 REQUIRED 查看当前是否有事务,如果有,使用当前事务,如果没有开启新事务 --> <tx:method name="save*" propagation="REQUIRED"/> <tx:method name="update*" propagation="REQUIRED"/> <tx:method name="find*" read-only="true"/> <tx:method name="*" propagation="REQUIRED"/> </tx:attributes> </tx:advice> <!-- 配置事务aop --> <aop:config> <!--expression 指明事务在哪里起作用 第一个* 表示所有返回值 第二个* 表示所有类 第三个* 表示类中的所有方法 .. 表示所有参数 --> <aop:pointcut expression="execution(* cn.wh.service.impl.*.*(..))" id="pointcut"/> <aop:advisor advice-ref="txAdvice" pointcut-ref="pointcut"/> </aop:config> <!-- 自动扫描 指定包下及其子包下的所有类中注解,并根据注解完成指定工作 --> <bean id="userDao" class="cn.wh.dao.impl.UserDaoImpl"> <property name="sqlSession" ref="sqlSession"></property> </bean> <bean id="userService" class="cn.wh.service.impl.UserServiceImpl"> <property name="userDao" ref="userDao"></property> </bean> </beans>
j) 测试
@Test public void testFindAll(){ ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext-dao.xml"); UserService userService = ac.getBean(UserService.class); List<User> list = userService.findAll(); System.out.println(list.size()); }
- 不需要使用mybatis的配置文件,那么需要在配置sqlSessionFactory时,将所需信息配置到是spring中。
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource"/> <property name="typeAliasesPackage" value="cn.wh.vo"/> <property name="mapperLocations"> <list> <value>classpath:cn/wh/mapper/UserMapper.xml</value> </list> </property>
- 不需要dao的实现,使用代理来生成的方式,UserService.java
public class UserServiceImpl implements UserService{ private UserMapper userMapper; public void setUserMapper(UserMapper userMapper) { this.userMapper = userMapper; } @Override public List<User> findAll() { return userMapper.findAll(); } }
- 配置文件为
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> <property name="driverClassName" value="com.mysql.jdbc.Driver"/> <property name="url" value="jdbc:mysql:///test"/> <property name="username" value="root"/> <property name="password" value="1111"/> </bean> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource"/> <property name="typeAliasesPackage" value="cn.wh.vo"/> <property name="mapperLocations"> <list> <value>classpath:cn/wh/mapper/UserMapper.xml</value> </list> </property> </bean> <!-- 配置声明式事务 --> <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource"></property> </bean> <!-- 配置事务通知 --> <tx:advice id="txAdvice" transaction-manager="txManager"> <tx:attributes> <!-- 表示以save开头的方法都需要事务 propagation 表示事务的传播特性 REQUIRED 查看当前是否有事务,如果有,使用当前事务,如果没有开启新事务 --> <tx:method name="save*" propagation="REQUIRED"/> <tx:method name="update*" propagation="REQUIRED"/> <tx:method name="find*" read-only="true"/> <tx:method name="*" propagation="REQUIRED"/> </tx:attributes> </tx:advice> <!-- 配置事务aop --> <aop:config> <!--expression 指明事务在哪里起作用 第一个* 表示所有返回值 第二个* 表示所有类 第三个* 表示类中的所有方法 .. 表示所有参数 --> <aop:pointcut expression="execution(* cn.wh.service.impl.*.*(..))" id="pointcut"/> <aop:advisor advice-ref="txAdvice" pointcut-ref="pointcut"/> </aop:config> <!-- 自动扫描 指定包下及其子包下的所有类中注解,并根据注解完成指定工作 --> <bean id="userMapper" class="org.mybatis.spring.mapper.MapperFactoryBean"> <property name="sqlSessionFactory" ref="sqlSessionFactory"/> <property name="mapperInterface" value="cn.wh.mapper.UserMapper"/> </bean> <bean id="userService" class="cn.wh.service.impl.UserServiceImpl"> <property name="userMapper" ref="userMapper"></property> </bean> </beans>
- 所有mapper的实现都自动生产成,需要接口和映射文件在同一个包下,文件名相同,方法名和statement的id名称相同,配置文件为:
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> <property name="driverClassName" value="com.mysql.jdbc.Driver"/> <property name="url" value="jdbc:mysql:///test"/> <property name="username" value="root"/> <property name="password" value="1111"/> </bean> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource"/> <property name="typeAliasesPackage" value="cn.wh.vo"/> <property name="mapperLocations"> <list> <value>classpath:cn/wh/mapper/UserMapper.xml</value> </list> </property> </bean> <!-- 自动扫描包,并且生成mapper的实现类,生成的bean的名称为mapper接口的首字母小写 --> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="cn.wh.mapper"/> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property> </bean> <!-- 配置声明式事务 --> <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource"></property> </bean> <!-- 配置事务通知 --> <tx:advice id="txAdvice" transaction-manager="txManager"> <tx:attributes> <!-- 表示以save开头的方法都需要事务 propagation 表示事务的传播特性 REQUIRED 查看当前是否有事务,如果有,使用当前事务,如果没有开启新事务 --> <tx:method name="save*" propagation="REQUIRED"/> <tx:method name="update*" propagation="REQUIRED"/> <tx:method name="find*" read-only="true"/> <tx:method name="*" propagation="REQUIRED"/> </tx:attributes> </tx:advice> <!-- 配置事务aop --> <aop:config> <!--expression 指明事务在哪里起作用 第一个* 表示所有返回值 第二个* 表示所有类 第三个* 表示类中的所有方法 .. 表示所有参数 --> <aop:pointcut expression="execution(* cn.wh.service.impl.*.*(..))" id="pointcut"/> <aop:advisor advice-ref="txAdvice" pointcut-ref="pointcut"/> </aop:config> <bean id="userService" class="cn.wh.service.impl.UserServiceImpl"> <property name="userMapper" ref="userMapper"></property> </bean> </beans>