文章目录
-
-
- 1.实体类
- 2.UserMapper接口
- 3.UserMapper.xml
- 4.mybatis-config.xml
- 5.spring-dao.xml
- 6.UserMapperImpl
- 7.applicationContext.xml
- 8.测试类
-
1.实体类
@Data
@AllArgsConstructor
@NoArgsConstructor
public class User {
private int id;
private String name;
private String pwd;
}
2.UserMapper接口
public interface UserMapper {
List<User> findUser();
//添加一个用户
public int addUser(User user);
//删除一个用户
public int deleteUser(int id);
}
3.UserMapper.xml
在这里故意制造一个错误: deletes from user where id=#{id};
<?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.kuang.mapper.UserMapper">
<select id="findUser" resultType="user">
select * from user;
</select>
<insert id="addUser" parameterType="user">
insert into mybatis.user(id, name, pwd) values(#{id},#{name},#{pwd})
</insert>
<delete id="deleteUser" parameterType="int">
deletes from user where id=#{id};
</delete>
</mapper>
4.mybatis-config.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<typeAliases>
<package name="com.kuang.pojo"/>
</typeAliases>
</configuration>
5.spring-dao.xml
<?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:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/aop
https://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/tx
https://www.springframework.org/schema/tx/spring-tx.xsd">
<!--DataSource: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/mybatis?useSSL=true&useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC"/>
<property name="username" value="root"/>
<property name="password" value="123"/>
</bean>
<!--sqlSessionFactory-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="datasource"/>
<!--绑定mybatis核心配置文件-->
<property name="configLocation" value="mybatis-config.xml"/>
<property name="mapperLocations" value="classpath:com/kuang/mapper/UserMapper.xml"/>
</bean>
<!--声明配置事务-->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="datasource"/>
</bean>
<!--结合AOP实现事务的织入-->
<!--配置事务通知-->
<tx:advice id="txAdvice" transaction-manager="transactionManager">
<!--给哪些方法配置事务-->
<!--配置事务的传播特性 new propagation=-->
<tx:attributes>
<tx:method name="add" propagation="REQUIRED"/>
<tx:method name="delete" propagation="REQUIRED"/>
<tx:method name="update" propagation="REQUIRED"/>
<tx:method name="query" read-only="true"/>
<tx:method name="*" propagation="REQUIRED"/>
</tx:attributes>
</tx:advice>
<!--配置事务切入-->
<aop:config>
<aop:pointcut id="txPointCut" expression="execution(* com.kuang.mapper.*.*(..))"/>
<aop:advisor advice-ref="txAdvice" pointcut-ref="txPointCut"/>
</aop:config>
</beans>
6.UserMapperImpl
在执行findUser()方法时,会执行增加用户和删除用户的操作
但是删除用户会报错,增加用户会执行成功
public class UserMapperImpl extends SqlSessionDaoSupport implements UserMapper{
public List<User> findUser() {
User user = new User(4,"ghh","123");
UserMapper mapper = getSqlSession().getMapper(UserMapper.class);
mapper.addUser(user);
mapper.deleteUser(4);
return mapper.findUser();
}
public int addUser(User user) {
UserMapper mapper = getSqlSession().getMapper(UserMapper.class);
return mapper.addUser(user);
}
public int deleteUser(int id) {
UserMapper mapper = getSqlSession().getMapper(UserMapper.class);
return mapper.deleteUser(id);
}
}
7.applicationContext.xml
<?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:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
<import resource="spring-dao.xml"/>
<bean id="userMapper" class="com.kuang.mapper.UserMapperImpl">
<property name="sqlSessionFactory" ref="sqlSessionFactory"/>
</bean>
</beans>
8.测试类
public class MyTest {
@Test
public void test() throws IOException {
ApplicationContext context =
new ClassPathXmlApplicationContext("applicationContext.xml");
UserMapper userMapper =
context.getBean("userMapper", UserMapper.class);
List<User> users = userMapper.findUser();
for(User user:users){
System.out.println(user);
}
}
}
增加事务以后,删除失败,添加也会失败。