Spring @Aspect实现切面编程

参考：http://blog.****.net/cdl2008sky/article/details/6268628

参考：http://www.360doc.com/content/12/0602/15/7656232_215420487.shtml 中的proxy-target-class

Spring @Aspect实现切面编程：

XML：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.springframework.org/schema/beans" xmlns:p="http://www.springframework.org/schema/p"
    xmlns:util="http://www.springframework.org/schema/util" xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop"
    xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.1.xsd
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
        http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.1.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd">
    <!-- 这个声明会创建AnnotationAwareAspectJAutoProxyCreator，进行切面Bean的代理 -->
    <aop:aspectj-autoproxy />
    <!-- 必须将切面类声明为一个Bean -->
    <bean id="audience" class="com.stono.sprtest3.Audience"></bean>
    <bean id="singer" class="com.stono.sprtest3.Singer"></bean>
</beans>

AppBean：

package com.stono.sprtest3;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class AppBeans11 {

    @SuppressWarnings("resource")
    public static void main(String[] args) {
        ApplicationContext context = new ClassPathXmlApplicationContext("appbeans11.xml");
        Performer singer = (Performer) context.getBean("singer");
        singer.perform();
    }

}

切面类：

package com.stono.sprtest3;
import org.aspectj.lang.ProceedingJoinPoint;
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;
@Aspect
public class Audience {
    // 为一个类进行切点的声明也是可以的；
    // @Pointcut("execution(* com.stono.sprtest3.Singer.perform()(..))")
    @Pointcut("execution(* com.stono.sprtest3.Performer.perform(..))")
    public void pointcut() {// 方法名称就是一个标记
    }
    @Before("pointcut()")
    public void takeSeat() {
        System.out.println("com.stono.sprtest2.Audience.takeSeat()");
    }
    @Before("pointcut()")
    public void turnOffPhone() {
        System.out.println("com.stono.sprtest2.Audience.turnOffPhone()");
    }
    @AfterReturning("pointcut()")
    public void applaud() {
        System.out.println("com.stono.sprtest2.Audience.applaud()");
    }
    @AfterThrowing("pointcut()")
    public void refund() {
        System.out.println("com.stono.sprtest2.Audience.refund()");
    }
    @Around("pointcut()")
    public void watchPerformance(ProceedingJoinPoint joinPoint) {
        try {
            System.out.println("The audience is taking their seats.");
            System.out.println("The audience is turning off their cellphones.");
            long start = System.currentTimeMillis();
            joinPoint.proceed();
            long end = System.currentTimeMillis();
            System.out.println("CLAP CLAP CLAP CLAP CLAP CLAP");
            System.out.println("The performance took " + (end - start) + " milliseconds.");
        } catch (Throwable e) {
            e.printStackTrace();
            System.out.println("Boo! We want our money back!");
        }
    }
}

接口和类：

package com.stono.sprtest3;
public interface Performer {
    void perform();
}
package com.stono.sprtest3;
public class Singer implements Performer {
    public void perform() {
        System.out.println("com.stono.sprtest3.Singer.perform()");
    }
}