Struts2（二）action的三种方式

package com.pb.web.action;/* * 创建普通的java类 */public class HelloAction1 {    public String execute(){        return "success";            }}

package com.pb.web.action;import com.opensymphony.xwork2.Action;/* * 第二种实现Action接口 */public class HelloAction2 implements Action {    @Override    public String execute() throws Exception {        // TODO Auto-generated method stub        return "success";    }}

package com.pb.web.action;import com.opensymphony.xwork2.ActionSupport;/* * 第三种 继承  ActionSupport类它是Action的实现类 */public class HelloAction3 extends ActionSupport {    /**     *      */    PRivate static final long serialVersionUID = 1L;    @Override    public String execute() throws Exception {        // TODO Auto-generated method stub        return "success";    }    }