什么静态/动态代理，内容详解，只要看就会懂

1 public interface IGamePlayer {
2     
3 　　　　//登录
4     public void login(String username ,String password);
5     　　//打怪
6     public void killboss();
7     　　//升级
8     public void upgrade();
9 }

 1 public class GamePlayer implements IGamePlayer{
 2 
 3     private String name;
 4     
 5     public GamePlayer(String name) {
 6         this.name = name ;
 7     }
 8     
 9     @Override
10     public void login(String username ,String password) {
11         // TODO Auto-generated method stub
12         System.out.println(username+"：登录成功");
13     }
14 
15     @Override
16     public void killboss() {
17         // TODO Auto-generated method stub
18         System.out.println(this.name+"正在打怪");
19     }
20 
21     @Override
22     public void upgrade() {
23         // TODO Auto-generated method stub
24         System.out.println(this.name+"已升级");
25     }
26 
27 }

 1 public class GamePlayerProxy implements IGamePlayer{
 2 
 3     private IGamePlayer player;
 4     
 5     public GamePlayerProxy(IGamePlayer player) {
 6         // TODO Auto-generated constructor stub
 7         this.player = player;
 8     }
 9     
10     @Override
11     public void login(String username, String password) {
12         // TODO Auto-generated method stub
13         this.player.login(username, password);
14     }
15 
16     @Override
17     public void killboss() {
18         // TODO Auto-generated method stub
19         this.player.killboss();
20     }
21 
22     @Override
23     public void upgrade() {
24         // TODO Auto-generated method stub
25         this.player.upgrade();
26     }
27 
28 }

 1 public class GameTest {
 2     public static void main(String[] args) {
 3         
 4         //静态代理
 5         IGamePlayer player = new GamePlayer("龙大侠");
 6         IGamePlayer proxy = new GamePlayerProxy(player);
 7         proxy.login("long", "123456");
 8         proxy.killboss();
 9         proxy.upgrade();
10 
11     }
12 }

 1 import java.lang.reflect.InvocationHandler;
 2 import java.lang.reflect.Method;
 3 
 4 public class DynamicProxyHandler implements InvocationHandler{
 5 
 6     private IGamePlayer player;
 7     
 8     public DynamicProxyHandler(IGamePlayer player) {
 9         this.player = player;
10     }
11     
12     @Override
13     public Object invoke(Object proxy, Method method, Object[] args)
14             throws Throwable {
15         if(method.getName().equals("killboss")){
16             System.out.println("戴上戒指打怪……");
17         }
18         
19         return method.invoke(player, args);
20     }
21 
22 }

 1 import java.lang.reflect.InvocationHandler;
 2 import java.lang.reflect.Proxy;
 3 
 4 public class GameTest {
 5     public static void main(String[] args) {
 6         
 7         //静态代理
 8 //        IGamePlayer player = new GamePlayer("龙大侠");
 9 //        IGamePlayer proxy = new GamePlayerProxy(player);
10 //        proxy.login("long", "123456");
11 //        proxy.killboss();
12 //        proxy.upgrade();
13         
14         
15         //动态代理
16         IGamePlayer player = new GamePlayer("龙大侠");
17         
18         //定义触发管理器
19         InvocationHandler hander = new DynamicProxyHandler(player);
20         
21         //创建动态代理对象(三个参数：loader类加载器：把Java字节码文件加载到JVM里 。Class：被代理对象实现的所有接口。实现了触发管理器InvocationHandler的这个类
22         IGamePlayer proxy = (IGamePlayer) Proxy.newProxyInstance(player.getClass().getClassLoader(), new Class[]{IGamePlayer.class}, hander);
23         proxy.login("long", "123456");
24         proxy.killboss();
25         proxy.upgrade();
26     }
27 }