AOP注解实现（AspectJ）

 .注解实现
架包
aspectjrt.jar
asm-2.2.3.jar
asm-commons-2.2.3.jar
asm-util-2.2.3.jar
spring.jar
cglib-nodep-2.1_3.jar
log4j-1.2.11.jar
commons-logging-1.0.4.jar
配置AOP.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"
xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
    http://www.springframework.org/schema/aop
    http://www.springframework.org/schema/aop/spring-aop-2.0.xsd">
    <aop:aspectj-autoproxy proxy-target-class="true"/>
    <bean id="shopwaiterProxy" class="aopaspectjauto.ShopWaiter" />
    <bean class="aopaspectjauto.TestAspect" />
</beans>

1.接口NeedTest  注解接口 
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
public @interface NeedTest {

    boolean value() default false;
}
2.类ShopWaiter
public class ShopWaiter implements Waiter {

    @NeedTest(value = false)
    public void sayHello(String name) {
        System.out.println("say hello to:" + name);
    }

    @NeedTest(value = true)
    public void sayhi() {
        System.out.println("say hi to Bill");
    }
}
3.类TestAspect   注解界面
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
@Aspect
public class TestAspect {

    @AfterReturning("@annotation(NeedTest)")  //注解表达式
    public void needTestFun() {
        System.out.println("after needTestFun() executed");
    }

    @Before("@annotation(NeedTest)")
    public void needTestFu() {
        System.out.println("before needTestFun() executed");
    }
}
4.接口Waiter
public interface Waiter {
    void sayHello(String name);
    void sayhi();
}
5.使用Main
import java.lang.reflect.Method;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class Main {
    public static void main(String[] args) {
        ApplicationContext ctx = new ClassPathXmlApplicationContext("/AOP.xml");
        Waiter waiter = (ShopWaiter) ctx.getBean("shopwaiterProxy");
        waiter.sayHello("========");
        waiter.sayhi();
    }
    public static void testComment() {
        Class clazz = ShopWaiter.class;
        Method[] methods = clazz.getDeclaredMethods();
        for (Method m : methods) {
            NeedTest nt = m.getAnnotation(NeedTest.class);
            if(nt != null){
                if(nt.value()){
                    System.out.println(m.getName()+"()需要测试");
                }else{
                    System.out.println(m.getName()+"()不需要测试");
                }
            }
        }
    }
}