spring Aop的一个demo

时间：2023-03-09 14:23:09
spring Aop的一个demo

面向切面是什么我就不说了.

上代码:

package com.foreveross.service.weixin.test;

import java.lang.annotation.Documented;

import java.lang.annotation.ElementType;

import java.lang.annotation.Retention;

import java.lang.annotation.RetentionPolicy;

import java.lang.annotation.Target;

@Documented

@Retention(value=RetentionPolicy.RUNTIME)

@Target(ElementType.METHOD)

public @interface Action {

    String name();

}
package com.foreveross.service.weixin.test;

import org.springframework.stereotype.Service;

@Service

public class DemoService {

    @Action(name="注解拦截操作...,这个是add操作...")

    public void addDemo(){

    }

}
package com.foreveross.service.weixin.test;

import org.springframework.stereotype.Service;

@Service

public class Demo1Service {

    @Action(name="addDemo1的日志")

    public void addDemo1(){

    }

}
package com.foreveross.service.weixin.test;

import java.lang.reflect.Method;

import org.aspectj.lang.JoinPoint;

import org.aspectj.lang.annotation.After;

import org.aspectj.lang.annotation.Aspect;

import org.aspectj.lang.annotation.Before;

import org.aspectj.lang.annotation.Pointcut;

import org.aspectj.lang.reflect.MethodSignature;

import org.springframework.stereotype.Component;

@Aspect

@Component

public class LogAspect {

    @Pointcut("@annotation(com.foreveross.service.weixin.test.Action)")

    public void annotationPointCut(){}

    @Before("execution(* com.foreveross.service.weixin.test.*.*(..))")

    public void before(JoinPoint joinPoint){

        MethodSignature signature=(MethodSignature)joinPoint.getSignature();

        Method method=signature.getMethod();

        System.out.println("方法规则式拦截:"+method.getName());

    }

    @After("annotationPointCut()")

    public void after(JoinPoint joinPoint){

        MethodSignature signature=(MethodSignature)joinPoint.getSignature();

        Method method=signature.getMethod();

        Action action=method.getAnnotation(Action.class);

        System.out.println("注解式拦截..."+action.name());

    }

}
package com.foreveross.service.weixin.test;

import org.springframework.context.annotation.ComponentScan;

import org.springframework.context.annotation.Configuration;

import org.springframework.context.annotation.EnableAspectJAutoProxy;

@Configuration

@ComponentScan("com.foreveross.service.weixin.test")

@EnableAspectJAutoProxy//注解开启Spring对AspectJ的支持

public class AppConfig {

}
package com.foreveross.service.weixin.test;

import org.springframework.context.annotation.AnnotationConfigApplicationContext;

public class Test {

    public static void main(String[] args) {

        AnnotationConfigApplicationContext context=new AnnotationConfigApplicationContext(AppConfig.class);

        DemoService demo=context.getBean(DemoService.class);

        Demo1Service demo1=context.getBean(Demo1Service.class);

        demo.addDemo();

        demo1.addDemo1();

        context.close();

    }

}

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