Java design Pattern (vii): Proxy mode proxy (static agent mode + dynamic proxy mode) __java

Static proxy

Package com.iter.devbox.staticProxy;

Public interface Star {public
	
	void Sing ();

}

Package com.iter.devbox.staticProxy;

public class Realstar implements Star {

	@Override public
	void Sing () {
		System.out.println this.getclass ( ). GetName () + ". Sing ()");
	}

	

Package com.iter.devbox.staticProxy;

Public class Starhandler implements star {

	private star Realstar;
	
	Public Starhandler (Star Realstar) {
		super ();
		This.realstar = Realstar;
	}

	@Override public
	void Sing () {
		System.out.println (This.getclass (). GetName () + ". Sing () before execution");
		Realstar.sing ();
		System.out.println (This.getclass (). GetName () + ". Sing () after execution");

Package com.iter.devbox.staticProxy;

public class Client {public

	static void Main (string[] args) {
		new Starhandler (New Realstar ()). sing ();

Dynamic Proxy

Package com.iter.devbox.dynamicProxy;

Public interface Star {public
	
	void Sing ();

}

Package com.iter.devbox.staticProxy;

public class Realstar implements Star {

	@Override public
	void Sing () {
		System.out.println (this.getclass (). GetName () + ". Sing ()");
	}

	

Package com.iter.devbox.dynamicProxy;

Import Java.lang.reflect.InvocationHandler;
Import Java.lang.reflect.Method;

public class Starhandler implements Invocationhandler {
	
	Object star;
	
	Public Starhandler (Object star) {
		super ();
		This.star = Star;
	}

	@Override Public
	object Invoke (Object proxy, Method method, object[] args) throws Throwable {
		System.out.println ("Before the agent method executes");
		Object obj = Method.invoke (star, args);
		System.out.println ("After the agent method executes");
		return obj;
	}

}

Package com.iter.devbox.dynamicProxy;

Import Java.lang.reflect.Proxy;

public class Client {public

	static void Main (string[] args) {
		Star Realstar = new Realstar ();
		Call Processor
		Starhandler handler = new Starhandler (Realstar);
		Generate proxy class interface using JDK Dynamic proxy
		star star = (Star) proxy.newproxyinstance (Classloader.getsystemclassloader (), 
				new Class[]{star.class}, handler);
		Star.sing ();
	}