通过动态代理模拟Spring AOP

package com.bestaone.aop; import java.lang.reflect.InvocationHandler; import java.lang.reflect.Method; import java.lang.reflect.Proxy; /** * 代理类 * @author 张国圣 */ public class AopHandler implements InvocationHandler{ private Object proxyObj; private Listener[] listeners; public Object bind(Object obj,Listener[] listeners) { this.proxyObj = obj; this.listeners = listeners; return Proxy.newProxyInstance(obj.getClass().getClassLoader(), obj.getClass().getInterfaces(), this); } /** * 由于线程的关系,打印的顺序不是我们想要的，但这不影响这个说明AOP! */ public Object invoke(Object proxy, Method method, Object[] args) throws Throwable { Object result = null; try { if(listeners!=null){ this.before(proxy, method, args); } result = method.invoke(proxyObj, args); if(listeners!=null){ this.after(proxy, method, args); } } catch (Exception e) { e.printStackTrace(); } return result; } /** * 方法前监听 * @param proxy * @param method * @param args */ public void before(Object proxy, Method method, Object[] args){ for(int i=0;i<listeners.length;i++){ listeners[i].before(proxy, method, args); } } /** * 方法后监听 * @param proxy * @param method * @param args */ public void after(Object proxy, Method method, Object[] args){ for(int i=listeners.length-1;i>=0;i--){ listeners[i].after(proxy, method, args); } } }