1.IAccountService接口和實作類
package com.service;
/**
* 賬戶業務層的接口
*/
public interface IAccountService {
public void saveAccount() ;
}
package com.service.impl;
import com.service.IAccountService;
import org.springframework.stereotype.Service;
/**
* 賬戶的業務層實作類
*/
@Service("accountService")
public class AccountServiceImpl implements IAccountService{
public void saveAccount() {
System.out.println("執行了儲存");
// int i=1/0;
}
}
2.Logger類
package com.utils;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.*;
import org.springframework.stereotype.Component;
@Component("logger")
@Aspect//表示目前類是一個切面類
public class Logger {
@Pointcut("execution(* com.service.impl.*.*(..))")
private void pt1(){}
/**
* 前置通知
*/
@Before("pt1()")
public void beforePrintLog(){
System.out.println("前置通知Logger類中的beforePrintLog方法開始記錄日志了。。。");
}
/**
* 後置通知
*/
@AfterReturning("pt1()")
public void afterReturningPrintLog(){
System.out.println("後置通知Logger類中的afterReturningPrintLog方法開始記錄日志了。。。");
}
/**
* 異常通知
*/
@AfterThrowing("pt1()")
public void afterThrowingPrintLog(){
System.out.println("異常通知Logger類中的afterThrowingPrintLog方法開始記錄日志了。。。");
}
/**
* 最終通知
*/
@After("pt1()")
public void afterPrintLog(){
System.out.println("最終通知Logger類中的afterPrintLog方法開始記錄日志了。。。");
}
/**
* 環繞通知
*/
// @Around("pt1()")
public Object aroundPringLog(ProceedingJoinPoint pjp){
Object rtValue = null;
try{
Object[] args = pjp.getArgs();//得到方法執行所需的參數
System.out.println("Logger類中的aroundPringLog方法開始記錄日志了。。。前置");
rtValue = pjp.proceed(args);//明确調用業務層方法(切入點方法)
System.out.println("Logger類中的aroundPringLog方法開始記錄日志了。。。後置");
return rtValue;
}catch (Throwable t){
System.out.println("Logger類中的aroundPringLog方法開始記錄日志了。。。異常");
throw new RuntimeException(t);
}finally {
System.out.println("Logger類中的aroundPringLog方法開始記錄日志了。。。最終");
}
}
}
3.bean.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: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">
<!-- 配置spring建立容器時要掃描的包-->
<context:component-scan base-package="com"></context:component-scan>
<!-- 配置spring開啟注解AOP的支援 -->
<aop:aspectj-autoproxy></aop:aspectj-autoproxy>
</beans>
4測試
import com.service.IAccountService;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class AOPTest {
public static void main(String[] args) {
//1.擷取容器
ApplicationContext ac = new ClassPathXmlApplicationContext("bean.xml");
//2.擷取對象
IAccountService as = (IAccountService)ac.getBean("accountService");
//3.執行方法
as.saveAccount();
}
}
5結果
spring基于 注解的 AOP 的前後置通知,異常通知,最終通知,環繞通知 6.順序問題
7.基本注解