Java 动态代理Proxy和Invacationhandler的使用

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所有动态代理其实是利用反射机制的基础，反射调用代理对象delegate的方法时，我们可以在调用前和调用后实现自己的作用代码，达到动态给原有方法增加功能的目的，好吧闲话少说直接上代码:

private DynamicMethod mDynamicMethod;private Object mDelegate;public QxInvocationHandler(Object delegate) {    this.mDelegate = delegate;}public QxInvocationHandler(Object delegate, DynamicMethod dynamicMethod) {    this.mDelegate = delegate;    this.mDynamicMethod = dynamicMethod;}public Object bind() {    return Proxy.newProxyInstance(Thread.currentThread().getContextClassLoader(),            mDelegate.getClass().getInterfaces(), this);}@Overridepublic Object invoke(Object proxy, Method method, Object[] args) throws Throwable {    Object obj = null;    if (mDynamicMethod != null) {        mDynamicMethod.beforeInvokeMothed();    }    obj = method.invoke(mDelegate, args);    if (mDynamicMethod != null) {        mDynamicMethod.afterInvokeMehod();    }    return obj;}public void setmDynamicMethod(DynamicMethod mDynamicMethod) {    this.mDynamicMethod = mDynamicMethod;}public interface DynamicMethod {    void beforeInvokeMothed();    void afterInvokeMehod();}

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