基於annotation方案,註解開發
第一步:在配置文件中開啓aspectj的註解
<aop:aspectj-autoproxy proxy-target-class="true"></aop:aspectj-autoproxy>
<?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:context="http://www.springframework.org/schema/context"
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/context http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">
<!-- 過濾可以使用註解的對象的類 -->
<context:component-scan base-package="cmo.demo"></context:component-scan>
<!-- 開啓aspectj註解自動代理 -->
<aop:aspectj-autoproxy proxy-target-class="true"></aop:aspectj-autoproxy>
</beans>
第二步:
A,在通知類中用@component標籤來聲明一個通知
B,在通知類中用@Aspect來聲明一個切面
C,在通知類的方法中設置要過濾後,增強的方法
@Pointcut("execution(* *Test(..))")
public void pointcutTest(){};
D,在通知類中用標籤來設置環繞通知,前置通知等
@Before("pointcutTest()")
package cmo.demo.aspectj_annotation;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.stereotype.Component;
//用註解聲明是一個通知
@Component
@Aspect //聲明這個類就是一個切面
public class CustomerServiceHelper {
@Pointcut("execution(* *Test(..))")
public void pointcutTest(){};
@Before("pointcutTest()")
public void before(JoinPoint jp) {
System.out.println("前置通知...");
}
@AfterReturning("pointcutTest()")
public void afterReturing(JoinPoint jp){
System.out.println("後置通知");
}
@Around("pointcutTest()")
public void around(ProceedingJoinPoint pjp) throws Throwable{
System.out.println("環繞方法+方法前");
Object proceed = pjp.proceed();
System.out.println("環繞方法+方法後");
}
@AfterThrowing(value="pointcutTest()",throwing="ex")
public void throwtest(JoinPoint jp, Throwable ex){
System.out.println("我要拋異常了"+ex);
}
@After("pointcutTest()")
public void after(JoinPoint jp){
System.out.println("最終會執行的方法");
}
}
將配置文件和通知類寫完以後就可以實現以上功能了