继承ActionSupport例子

struts配置文件内容：

<?xml version="1.0" encoding="UTF-8" ?>
  <!DOCTYPE struts PUBLIC
  "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
  "http://struts.apache.org/dtds/struts-2.0.dtd">
  <struts>
/package> 
     <package name="helloworld"  extends="struts-default">  
        <action name="helloworldAction" class="com.zhaker.action.HelloWorldAction">  
            <result name="toWelcome">/index.jsp</result> 
             <result name="input">/register.jsp</result>           
        </action> 
    </package> 
 </struts>

类文件内容：

package com.zhaker.action;
import com.opensymphony.xwork2.ActionSupport;
  
public class HelloWorldAction extends ActionSupport {  
    private String account;  
    private String password;  
    private String submitFlag;  
    public String execute() throws Exception {  
        this.businessExecute();  
        return "toWelcome";  
    }  
    public void validate(){  
        if(account==null || account.trim().length()==0){  
            this.addFieldError("account", "账号不可以为空");  
        }  
        if(password==null || password.trim().length()==0){  
            this.addFieldError("password", "密码不可以为空");  
        }
        if(password!=null && !"".equals(password.trim()) && password.trim().length()<6){  
            this.addFieldError("password", "密码长度至少为6位");  
        }  
    }  
    /** 
     * 示例方法，表示可以执行业务逻辑处理的方法， 
     */  
    public void businessExecute(){  
        System.out.println("用户输入的参数为==="+"account="+account+",password="+password+",submitFlag="+submitFlag);  
    }
    public String getAccount() {
        return account;
    }
    public void setAccount(String account) {
        this.account = account;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    public String getSubmitFlag() {
        return submitFlag;
    }
    public void setSubmitFlag(String submitFlag) {
        this.submitFlag = submitFlag;
    }  
    
}

web.xml内容：
继承ActionSupport例子
把jar包放进lib下：

register.jsp的内容：

<%@ page language="java" contentType="text/html; charset=utf-8"  
    pageEncoding="utf-8"%> 
<%@ taglib prefix="s" uri="/struts-tags"%> 
<html>  
<head>  
<meta http-equiv="Content-Type" content="text/html; utf-8">  
<title>Insert title here</title>  
<style type="text/css">
ul,li {
    list-style-type:none;
    margin:0px;
    float:left;
}
</style>
</head>  
<body>  
   
<form action="helloworldAction.action" method="post"> 
    <input type="hidden" name="submitFlag" value="login"/>  
    <div> 
        <font color=red><s:fielderror fieldName="account"/></font>
        <br/>
          账号:<input type="text" name="account">
    </div>
    <div>
        <font color=red><s:fielderror fieldName="password"/></font>
        <br/>
            密码:<input type="password" name="password">
    </div>
    <input type="submit" value="提交">  
</form>  
  
</body>  
</html>

index.jsp页面随便写些什么都行，这样，一个继承了ActionSupport的例子就写好了