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j2ee前台jsp表单隐藏传变量到后台action!

我就想试下JSP表单隐藏传属性到后台,可我设的这个变量 p 传过去action那打印出来是“空值”,当我传的是常量的时候是没有问题的,我想请教下这个变量问题出在那!谢谢

JSP页面代码如下:

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

<%@ taglib prefix="s" uri="/struts-tags"%>

<%

String path = request.getContextPath();

String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

%>


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

  <head>

    <base href="<%=basePath%>">

    <title>注册页</title>

  </head>

  <%!

  String p="1581458541";

   %>

  <body>

  

  <center>

  <s:form action="zhucechenggong.action" method="post">

  <s:textfield name="user.name" label="账户名"></s:textfield>

  <s:password name="user.password" label="密码"></s:password>

  <s:hidden name="user.phone" value="%{p}"></s:hidden>

  <s:submit value="注册"></s:submit>

  </s:form>

  </center>

  </body>

</html>


跳转到java的action代码如下:

package com.action;


import com.opensymphony.xwork2.ActionSupport;

import com.user.User;

import com.server.*;

@SuppressWarnings("serial")

public class ZhuCeAction extends ActionSupport {

private User user;

private UserServer userServer;


public void setUserServer(UserServer userServer) {

this.userServer = userServer;

}


public User getUser() {

return user;

}


public void setUser(User user) {

this.user = user;

}

public String execute()throws Exception{

userServer.save(user);

System.out.println(user.getPhone());

return SUCCESS;

}


}


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黑女2008

value是input默认属性,好像不能接收表达式,可以这样写<s:hidden name="user.phone" value=""  a="<%= p %>"></s:hidden>自己声明个属性,但是这样还不如,js,在提交的时候给你的phone赋值。
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