struts2 Action的三种写法

//写法1
//public class Hello {
//    public String hell(){
//        System.out.println("hello..................");
//        return "h";
//    }
//}


//写法2

//import com.opensymphony.xwork2.Action;
//import com.opensymphony.xwork2.ActionSupport;

//public class Hello implements Action{
//    
//}

//写法3
public class Hello extends ActionSupport{
    
}