Spring-- 基于 AOP 实现事务控制
connectionUtils.getThreadConnection().setAutoCommit(false);
} catch (SQLException e) {
e.printStackTrace();
}
}
/**
提交事务
*/
public void commit(){
try {
connectionUtils.getThreadConnection().commit();
} catch (SQLException e) {
e.printStackTrace();
}
}
/**
回滚事务
*/
public void rollback(){
try {
connectionUtils.getThreadConnection().rollback();
} catch (SQLException e) {
e.printStackTrace();
}
}
/**
释放连接
*/
public void release(){
try {
connectionUtils.getThreadConnection().close();
connectionUtils.removeConnection();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
配置 bean.xml 文件
<?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:context="http://www.springframework.org/schema/context"
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/context
http://www.springframework.org/schema/context/spring-context.xsd">
<bean id="accountService" class="com.ly.service.impl.AccountServiceImpl">
<property name="accountDao" ref="accountDao"></property>
</bean>
<bean id="accountDao" class="com.ly.dao.impl.AccountDaoImpl">
<property name="runner" ref="runner"></property>
<property name="connectionUtils" ref="connectionUtils"></property>
</bean>
<bean id="runner" class="org.apache.commons.dbutils.QueryRunner" scope="prototype">
</bean>
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="com.mysql.cj.jdbc.Driver"></property>
<property name="jdbcUrl" value="jdbc:mysql://localhost:3306/spring?serverTimezone=GMT%2B8&useUnicode=true&characterEncoding=utf-8"></property>
<property name="user" value="root"></property>
<property name="password" value="123456"></property>
</bean>
<bean id="connectionUtils" class="com.ly.utils.ConnectionUtils">
<property name="dataSource" ref="dataSource"></property>
</bean>
<bean id="txManager" class="com.ly.utils.TransactionManager">
<property name="connectionUtils" ref="connectionUtils"></property>
</bean>
<aop:pointcut id="pt1" expression="execution(* com.ly.service.impl..(..))"/>
<aop:aspect id="txAdvice" ref="txManager">
<aop:before method="beginTransaction" pointcut-ref="pt1"></aop:before>
<aop:after-returning method="commit" pointcut-ref="pt1"></aop:after-returning>
<aop:after-throwing method="rollback" pointcut-ref="pt1"></aop:after-throwing>
<aop:after method="release" pointcut-ref="pt1"></aop:after>
</aop:aspect>
</aop:config>
</beans>
AccountServiceImpl 中添加相关的方法：
public void transfer(String sourceName, String targetName, Float money) {
System.out.println("开始执行。。。");
//2.执行操作
//2.1.根据名称查询转出账户
Account source=accountDao.findAccountByName(sourceName);
//2.2.根据名称查询转入账户
Account target=accountDao.findAccountByName(targetName);
//2.3.转出账户减钱
source.setMoney(source.getMoney()-money);
int a=1/0;
//2.4.转给账户加钱
target.setMoney(target.getMoney()+money);
//2.5.更新装出账户
accountDao.updateAccount(source);
//2.6.更新转入账户
accountDao.updateAccount(target);
}
测试转账案例：
首先我们先看我们数据库表中的数据：
执行测试代码：
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:bean.xml")
public class AccountServiceTest {
@Autowired
private IAccountService as;
@Test
public void testTransfer(){
as.transfer("aaa","bbb",100f);
}
}
由于在转账过程中，转出账户后出现了/by zero 错误，我们在看一下数据库表有没有发生改变。
数据表并没有发生改变，实现了回滚。
使用注解修改银行转账案例：
修改 bean.xml 文件
<?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:context="http://www.springframework.org/schema/context"
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/context
http://www.springframework.org/schema/context/spring-context.xsd">
<context:component-scan base-package="com.ly"></context:component-scan>
<bean id="runner" class="org.apache.commons.dbutils.QueryRunner" scope="prototype">
</bean>
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="com.mysql.cj.jdbc.Driver"></property>
<property name="jdbcUrl" value="jdbc:mysql://localhost:3306/spring?serverTimezone=GMT%2B8&useUnicode=true&characterEncoding=utf-8"></property>
<property name="user" value="root"></property>
<property name="password" value="123456"></property>
</bean>
aop:aspectj-autoproxy</aop:aspectj-autoproxy>
</beans>
在 AccountServiceImpl 中添加相关注解：
在 AccountDaoImpl 中添加相关注解：
在 ConnectionUtils 中添加相关注解：
在 TransactionManager 中添加相关注解：
@Component("txManager")
@Aspect
public class TransactionManager {
@Autowired
private ConnectionUtils connectionUtils;
@Pointcut("execution(* com.ly.service.impl..(..))")
private void pt1(){}
/**
开启事务
*/
//@Before("pt1()")
public void beginTransaction(){
try {
connectionUtils.getThreadConnection().setAutoCommit(false);
} catch (SQLException e) {
e.printStackTrace();
}
}
/**
提交事务
*/
//@AfterReturning("pt1()")
public void commit(){
try {
connectionUtils.getThreadConnection().commit();
} catch (SQLException e) {
e.printStackTrace();
}
}
/**
回滚事务
*/
//@AfterThrowing("pt1()")
public void rollback(){
try {
connectionUtils.getThreadConnection().rollback();
} catch (SQLException e) {
e.printStackTrace();
}
}
/**
释放连接
*/
//@After("pt1()")
public void release(){
try {
connectionUtils.getThreadConnection().close();
connectionUtils.removeConnection();
} catch (SQLException e) {
e.printStackTrace();
}
}
@Around("pt1()")
public Object aroundAdvice(ProceedingJoinPoint pjp) {
Object rtValue = null;
try {
//1.获取参数
Object[] args = pjp.getArgs();
//2.开启事务
this.beginTransaction();
//3.执行方法
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