环绕通知
pom.xml
<?xml version="1.0" encoding="UTF-8"?><project xmlns="/POM/4.0.0"xmlns:xsi="/2001/XMLSchema-instance"xsi:schemaLocation="/POM/4.0.0 /xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><groupId>com.dym</groupId><artifactId>day03_eesy_04adviceType</artifactId><version>1.0-SNAPSHOT</version><build><plugins><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-compiler-plugin</artifactId><configuration><source>1.6</source><target>1.6</target></configuration></plugin></plugins></build><packaging>jar</packaging><dependencies><dependency><groupId>org.springframework</groupId><artifactId>spring-context</artifactId><version>5.0.2.RELEASE</version></dependency><dependency><groupId>org.aspectj</groupId><artifactId>aspectjweaver</artifactId><version>1.8.7</version></dependency></dependencies></project>
IAccountService.java
package com.itheima.service;/*** 账户的业务层接口*/public interface IAccountService {/*** 模拟保存账户*/void saveAccount();/*** 模拟更新账户* @param i*/void updateAccount(int i);/*** 删除账户* @return*/int deleteAccount();}
AccountServiceImpl.java
package com.itheima.service.impl;import com.itheima.service.IAccountService;/*** 账户的业务层实现类*/public class AccountServiceImpl implements IAccountService{@Overridepublic void saveAccount() {System.out.println("执行了保存");// int i=1/0;}@Overridepublic void updateAccount(int i) {System.out.println("执行了更新"+i);}@Overridepublic int deleteAccount() {System.out.println("执行了删除");return 0;}}
Logger.java
package com.itheima.utils;import org.aspectj.lang.ProceedingJoinPoint;/*** 用于记录日志的工具类，它里面提供了公共的代码*/public class Logger {/*** 前置通知*/public void beforePrintLog(){System.out.println("前置通知Logger类中的beforePrintLog方法开始记录日志了。。。");}/*** 后置通知*/public void afterReturningPrintLog(){System.out.println("后置通知Logger类中的afterReturningPrintLog方法开始记录日志了。。。");}/*** 异常通知*/public void afterThrowingPrintLog(){System.out.println("异常通知Logger类中的afterThrowingPrintLog方法开始记录日志了。。。");}/*** 最终通知*/public void afterPrintLog(){System.out.println("最终通知Logger类中的afterPrintLog方法开始记录日志了。。。");}public Object aroundPringLog(ProceedingJoinPoint pjp){Object rtValue = null;try{Object[] args = pjp.getArgs();//得到方法执行所需的参数System.out.println("Logger类中的aroundPringLog方法开始记录日志了。。。前置");rtValue = pjp.proceed(args);//明确调用业务层方法（切入点方法）System.out.println("Logger类中的aroundPringLog方法开始记录日志了。。。后置");return rtValue;}catch (Throwable t){System.out.println("Logger类中的aroundPringLog方法开始记录日志了。。。异常");throw new RuntimeException(t);}finally {System.out.println("Logger类中的aroundPringLog方法开始记录日志了。。。最终");}}}
bean.xml
<?xml version="1.0" encoding="UTF-8"?><beans xmlns="/schema/beans"xmlns:xsi="/2001/XMLSchema-instance"xmlns:aop="/schema/aop"xsi:schemaLocation="/schema/beans/schema/beans/spring-beans.xsd/schema/aop/schema/aop/spring-aop.xsd"><!-- 配置srping的Ioc,把service对象配置进来--><bean id="accountService" class="com.itheima.service.impl.AccountServiceImpl"></bean><!-- 配置Logger类 --><bean id="logger" class="com.itheima.utils.Logger"></bean><!--配置AOP--><aop:config><aop:pointcut id="pt1" expression="execution(* com.itheima.service.impl.*.*(..))"></aop:pointcut><!--配置切面 --><aop:aspect id="logAdvice" ref="logger"><!--配置前置通知：在切入点方法执行之前执行--><!--<aop:before method="beforePrintLog" pointcut-ref="pt1" ></aop:before>--><!--<!– 配置后置通知：在切入点方法正常执行之后值。它和异常通知永远只能执行一个--><!--<aop:after-returning method="afterReturningPrintLog" pointcut-ref="pt1"></aop:after-returning>--><!--配置异常通知：在切入点方法执行产生异常之后执行。它和后置通知永远只能执行一个--><!--<aop:after-throwing method="afterThrowingPrintLog" pointcut-ref="pt1"></aop:after-throwing>--><!--配置最终通知：无论切入点方法是否正常执行它都会在其后面执行--><!--<aop:after method="afterPrintLog" pointcut-ref="pt1"></aop:after>--><!-- 配置环绕通知 详细的注释请看Logger类中--><aop:around method="aroundPringLog" pointcut-ref="pt1"></aop:around></aop:aspect></aop:config></beans>
