Struts2 值在验证失败回到原来页面的时候会丢失的解决方案

来源：互联网发布：js实现求阶乘n 函数编辑：程序博客网时间：2024/06/10 09:25

关键词

struts2 验证失败后返回原来的页面如何将原来的值保留?
Struts2 值在验证失败回到原来页面的时候会丢失的解决方案?

如登录界面保留原来的用户名和密码

<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%><%@taglib uri="/struts-tags" prefix="s"%><%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>My JSP 'login.jsp' starting page</title><meta http-equiv="pragma" content="no-cache"><meta http-equiv="cache-control" content="no-cache"><meta http-equiv="expires" content="0">    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"><meta http-equiv="description" content="This is my page"><!--<link rel="stylesheet" type="text/css" href="styles.css">--><style>.errorMessage{color:red;}</style>  </head>    <body><form action="login" method="post">username:<input type="text" name="user.username"  value="${user.username}"  label="username" /><span class=errorMessage><s:property value="errors['user.username'][0]" /></span><br>password:<input type="password" name="user.password" value="${user.password}" label="password" /><span class=errorMessage><s:property value="errors['user.password'][0]" /></span><br><input type="submit"  align="left" /></form><br/><s:debug /></body></html>

LoginAction.java

package com.action;import javax.servlet.http.HttpServletRequest;import org.apache.struts2.ServletActionContext;import com.domain.User;import com.opensymphony.xwork2.ActionContext;import com.opensymphony.xwork2.ActionSupport;public class LoginAction extends ActionSupport {private User user ;public String login(){HttpServletRequest request = (HttpServletRequest) ActionContext.getContext().get( ServletActionContext.HTTP_REQUEST);if(user==null)return INPUT;String ret = SUCCESS;if(!user.getUsername().trim().equals("admin")){this.addFieldError("user.username", "Username Invalid");ret = INPUT;}if(!user.getPassword().trim().equals("1")){this.addFieldError("user.password", "Password Invalid");ret = INPUT;}return ret;}public User getUser() {return user;}public void setUser(User user) {this.user = user;}@Overridepublic String execute() throws Exception {System.out.println("login action @ method *execute()");return super.execute();}}

struts.xml

加入拦截器

defaultStack

<action name="login" method="login"  class="com.action.LoginAction"><interceptor-ref name="defaultStack"/><result name="success" type="redirect">/success.jsp</result><result name="login">/login.jsp</result><result name="input">/login.jsp</result></action>

结果如下图

另

其他解决方法：

http://www.blogjava.net/jjshcc/archive/2010/08/03/327870.html

Struts2 值在验证失败回到原来页面的时候会丢失的解决方案

关键词

struts2 验证失败后 返回原来的页面 如何将原来的值保留?Struts2 值在验证失败回到原来页面的时候会丢失的解决方案?

struts2 验证失败后返回原来的页面如何将原来的值保留?
Struts2 值在验证失败回到原来页面的时候会丢失的解决方案?