JDK动态代理模式

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public interface HelloWorld {    public void sayHelloWorld();}
public class HelloWorldImpl implements  HelloWorld {    @Override    public void sayHelloWorld() {        System.out.println("Hello World");    }}
public class JdkProxyExample implements InvocationHandler {    private Object target;    public Object bind(Object target){        this.target=target;        return Proxy.newProxyInstance(target.getClass().getClassLoader(),target.getClass().getInterfaces(),this);    }    @Override    public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {        System.out.println("进入代理逻辑方法");        System.out.println("在调度真实对象之前的服务");        Object object=method.invoke(target,args);        System.out.println("在调度真实对象之后的服务");        return object;    }}
public static void main(String args[]){     JdkProxyExample jdkProxyExample=new JdkProxyExample();     HelloWorld helloWorld= (HelloWorld) jdkProxyExample.bind(new HelloWorldImpl());     helloWorld.sayHelloWorld();}

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