java静态代理设计模式

package Test;

public class ProxyDemo {
    public static void main(String[] args) {
        Action userAction = new UserAction();
        ActionProxy proxy = new ActionProxy(userAction);
        proxy.doAction();
    }
}
class ActionProxy implements Action{
   private Action action;//被代理对象

    public ActionProxy(Action action) {
        this.action = action;
    }

    public void doAction() {//执行操作
        long statTime=System.currentTimeMillis();
        action.doAction();//执行真正的业务
        long endTimme=System.currentTimeMillis();
        System.out.println("共执行多长时间"+(endTimme-statTime)+"毫秒");
    }
}

interface Action{
    public void doAction();
}

class UserAction implements Action{
    @Override
    public void doAction() {
        System.out.println("用户工作中……");
    }
}