步骤:
导入相关jar包
编写配置文件
测试
注意版本限制:
dataSource(这里配置使用Spring的数据源替换Mybatis的配置)
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/dailyClick-test?useSSL=false&useUnicode=true&characterEncoding=utf-8"/>
<property name="username" value="1111"/>
<property name="password" value="1111"/>
</bean>
注:Mybatis有默认的数据源(连接池),但是是可以替换的
sqlSessionFactory配置
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<!-- 绑定配置文件地址和mapper地址-->
<property name="configLocation" value="classpath:mybatis-config.xml"/>
<property name="mapperLocations" value="classpath:com/guan/dao/*.xml"/>
</bean>
注意:
<bean>
中,不能重复配置(如:<mapper>
),否则会报错;mybatis-config.xml配置文件通常留<typeAlias>
和<settings>
与在原来的mybatis不同,整合后需要有一个接口的实现类,且接口的方法需要通过sqlSessionTemplate实现(有利于bean的注册和管理,这个sqlSessioinTemplate是线程安全的)
sqlSessionTemplate配置
<bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
<constructor-arg index="0" ref="sqlSessionFactory"/>
</bean>
注:由于sqlSessionTemplate没有set方法,只有构造函数,所以通过<constructor>
标签注入
实现类:与mybatis元素代码不同,接口类需要实现且接口的方法通过sqlSessionTemplate实现
public class UserMapperImpl implements UserMapper {
SqlSessionTemplate sqlSession;public void setSqlSession(SqlSessionTemplate sqlSession) {
this.sqlSession = sqlSession;
}
public List<UserBean> getUserList() {
UserMapper mapper = sqlSession.getMapper(UserMapper.class);
return mapper.getUserList();
}
}
<bean id="userMapper" class="com.guan.dao.UserMapperImpl">
<property name="sqlSession" ref="sqlSession"/>
</bean>
测试
public class MyTest {
public static void main(String[] args) throws IOException {
ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
UserMapperImpl userMapperImpl = context.getBean("userMapper", UserMapperImpl.class);
List<UserBean> userList = userMapperImpl.getUserList();
for (UserBean userBean : userList) {
System.out.println(userBean);
}
}
}
注:
(1).mybatis的配置文件(指的是和spring注册的那一部分),最好通过import引入ApplicationiContext中,这样spring配置文件的结构可以区分开
(2).xxxTemplate是spring特有的模板类
注:SqlSessionDaoSupport:抽象类,可以通过SqlSessionFactory获得一个SqlSessionTemplate.所以该方法相对于第一种方法增加了一个抽象类,减少了一个配置SqlSessionTemplate的步骤
环境搭建:
接口:
public interface UserMapper1 {
List<UserBean> getUserList();
}
xml实现
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.guan.dao.UserMapper1">
<select id="getUserList" resultType="userBean">
SELECT * FROM user;
</select>
</mapper>
实体类:
public class UserMapper1Impl extends SqlSessionDaoSupport implements UserMapper1{
public List<UserBean> getUserList() {
return getSqlSession().getMapper(UserMapper1.class).getUserList();
}
}
xml配置(在上文的前文的基础上配置)
<bean id="userMapper1" class="com.guan.dao.UserMapper1Impl">
<property name="sqlSessionFactory" ref="sqlSessionFactory"/>
</bean>
测试:
public static void main(String[] args) throws IOException {
ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
UserMapper1Impl userMapperImpl = context.getBean("userMapper1", UserMapper1Impl.class);
List<UserBean> userList = userMapperImpl.getUserList();
for (UserBean userBean : userList) {
System.out.println(userBean);
}
}
编程式事务:将事务管理代码嵌到业务方法中控制事务的提交和回滚
缺点:使业务逻辑中包含额外的事务管理代码
声明式事物:使用AOP
(1).搭建环境:
接口
public interface UserMapper1 {
List<UserBean> getUserList();
void insert(UserBean user);
void delete(String UId);
}
mapper:
<insert id="insert" parameterType="userBean">
INSERT INTO user(UId,UName,USet,UAuth,UPassword,UState) VALUES(#{UId},#{UName},#{USet},#{UAuth},#{UPassword},#{UState});
</insert>
<delete id="delete" parameterType="string">
DELETEs FROM user WHERE UId = #{UId};
</delete>
注:可以看到我这里的"DELETEs"是错误的写法
编写实体类:
public class UserMapper1Impl extends SqlSessionDaoSupport implements UserMapper1{
public List<UserBean> getUserList() {
insert(new UserBean("6666666666","淀真嗣",1,0,"123456",1));
delete("3180421016");
return getSqlSession().getMapper(UserMapper1.class).getUserList();
}public void insert(UserBean user) {
getSqlSession().getMapper(UserMapper1.class).insert(user);
}
public void delete(String UId) {
getSqlSession().getMapper(UserMapper1.class).delete(UId);
}
}
注:getUserList中添加了insert和delete方法,且delete方法是错误的.如果没有事务,则插入可以完成;如果有事务,则插入无法完成
(2).导入事务相关的xml头文件约束,创建DataSourceTransaction
对象以开启事务,配置事务通知,结合AOP实现事务的织入
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans
https://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/tx
https://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd"><bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://47.100.90.132:3306/dailyClick-test?useSSL=false&amp;useUnicode=true&amp;characterEncoding=utf-8"/>
<property name="username" value="root"/>
<property name="password" value="aguan123"/>
</bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<!-- bind mybatis-config.xml and userMapper.xml-->
<property name="configLocation" value="classpath:mybatis-config.xml"/>
<property name="mapperLocations" value="classpath:com/guan/dao/*.xml"/>
</bean><bean id="userMapper1" class="com.guan.dao.UserMapper1Impl">
<property name="sqlSessionFactory" ref="sqlSessionFactory"/>
</bean>
<!-- 配置声明式事务-->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>
<!-- 配置事务通知-->
<tx:advice id="txAdvice" transaction-manager="transactionManager">
<tx:attributes>
<tx:method name="getUserList" propagation="REQUIRED"/>
</tx:attributes>
</tx:advice>
<!-- 结合AOP织入事务-->
<aop:config>
<aop:pointcut id="point" expression="execution(* com.guan.dao.*.*(..))"/>
<!-- <aop:advisor advice-ref="txAdvice" pointcut-ref="point"/>-->
</aop:config>
</beans>
注:<tx:method name="getUserList" propagation="REQUIRED"/>
的propagation属性表示对这些方法怎样使用事务,如:REQUIRED表示支持当前事务,如果当前没有事务,就新建一个事务 (Default)
(3).测试
public class MyTest {public static void main(String[] args) throws IOException {
ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
UserMapper1 userMapperImpl = context.getBean("userMapper1", UserMapper1.class);
List<UserBean> userList = userMapperImpl.getUserList();
for (UserBean userBean : userList) {
System.out.println(userBean);
}
}
}
注意:由于使用了AOP,这里UserMapper1 userMapperImpl = context.getBean("userMapper1", UserMapper1.class)
的返回类型必须为interface类型,而不是实体类型
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