1.普通代理#

1.1定義##

普通代理要求客戶端只能訪問代理角色，不能訪問真實角色。

1.2實現(xiàn)##

1.2.1抽象角色類###

public interface IGamePlayer {    
  public void request();
}

1.2.2代理角色類###

public class GamePlayerProxy implements IGamePlayer{
    private IGamePlayer gamePlayer = null;
    public GamePlayerProxy(String _name) {
        try {
            gamePlayer = new GamePlayer(this, _name);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    @Override
    public void request() {
        this.before();
        this.gamePlayer.request();
        this.after();
    }

    private void before() {
        //代理動作前處理
    }

    private void after() {
        //代理動作后處理
    }
}

1.2.3真實角色類###

public class GamePlayer implements IGamePlayer{
    private String name = "";
    public GamePlayer(IGamePlayer _gamePlayer, String _name) throws Exception{
        if (_gamePlayer == null){
            throw new Exception("無法生成真實角色!");
            //此處添加一些創(chuàng)建的限制條件
        }else{
            this.name = _name;
        }
    }
    @Override
    public void request() {
        System.out.println("處理具體的事物");
    }
}

2.強制代理#

2.1定義##

強制代理要求必須通過真實角色查找到代理角色，否則不能訪問。代理角色由真實角色自己管理，不需要知道代理角色，代理角色還可以有自己的代理。

2.2實現(xiàn)##

2.2.1抽象代理類###

public interface IGamePlayer {    
  public void request();    
  public IGamePlayer getProxy();
}

2.2.2具體代理類###

public class GamePlayerProxy implements IGamePlayer{
    private IGamePlayer gamePlayer = null;
    private String name = "";
    public GamePlayerProxy(IGamePlayer _gamePlayer, String _name) {
        this.gamePlayer = _gamePlayer;
        this.name = _name;
    }

    @Override
    public void request() {
        this.before();
        this.gamePlayer.request();
        this.after();
    }

    //代理類還可以有自己的代理,此處沒有所以返回自己
    @Override
    public IGamePlayer getProxy() {
        return this;
    }

    private void before() {
        //代理動作前處理
    }

    private void after() {
        //代理動作后處理
    }

}

2.2.3真實角色類###

public class GamePlayer implements IGamePlayer{
    private String name = "";
    private IGamePlayer proxy = null;
    public GamePlayer(String _name) {
        this.name = name;
    }
    @Override
    public void request() {
        if (this.proxy == null){
            System.out.println("請獲取代理角色!");
        }else {
            System.out.println("處理具體的事物");
        }
    }

    @Override
    public IGamePlayer getProxy() {
        this.proxy = new GamePlayerProxy(this, name);
        return proxy;
    }
}

3.動態(tài)代理模式#

未完待續(xù)。。。