关于Java 设计模式 代理模式 Proxy

1、IKeeper.java

package com.ssm.cts.pattern.proxy;

public interface IKeeper {

  public void careForBoy();
}

2、Keeper.java

package com.ssm.cts.pattern.proxy;

public class Keeper implements IKeeper {
  private String name = "";

  public Keeper(String _name) {
    this.name = _name;
  }

  public void careForBoy() {
    System.out.println(this.name + "带娃");
  }
}

3、KeeperProxy.java

package com.ssm.cts.pattern.proxy;

public class KeeperProxy implements IKeeper {
  private IKeeper keeper = null;

  public KeeperProxy(IKeeper _keeper) {
    this.keeper = _keeper;
  }

  public void careForBoy() {
    System.out.println("静态代理前置内容：买菜");
    this.keeper.careForBoy();
    System.out.println("静态代理后置内容：洗碗");
  }

}

4、Demo.java

package com.ssm.cts.pattern.proxy;

import java.text.SimpleDateFormat;
import java.util.Date;

public class Demo {

  // 测试
  public static void main(String[] args) {
    // 定义一个监护人
    IKeeper keeper = new Keeper("蒋智昊");

    // 然后再定义一个保姆
    IKeeper proxy = new KeeperProxy(keeper);
  
    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");   
      
    // 开始
    System.out.println("开始时间是：" + sdf.format(new Date()));
    // 带娃
    proxy.careForBoy();
    // 结束
    System.out.println("结束时间是：" + sdf.format(new Date()) );
  }

}