(Struts)ActionForm类及表单数据验证

时间：2023-03-09 06:13:12
(Struts)ActionForm类及表单数据验证 
LoginForm代码:

/*

* Generated by MyEclipse Struts

* Template path: templates/java/JavaClass.vtl

*/

package com.zh.struts.form;

import javax.servlet.http.HttpServletRequest;

import org.apache.struts.action.ActionErrors;

import org.apache.struts.action.ActionForm;

import org.apache.struts.action.ActionMapping;

import org.apache.struts.action.ActionMessage;

/**

* MyEclipse Struts

* Creation date: 11-27-2013

*

* XDoclet definition:

* @struts.form name="loginForm"

*/fff

public class LoginForm extends ActionForm {

/*

* Generated Methods

*/

private String userName;

private String passWord;

/**

* Method validate

* @param mapping

* @param request

* @return ActionErrors

*/

public ActionErrors validate(ActionMapping mapping,

HttpServletRequest request) {

// TODO Auto-generated method stub

System.out.println("valudate go on");

ActionErrors error=new ActionErrors();

if(userName==null || userName.equals("")){

error.add( "userName",new ActionMessage( "userName")); //错误信息添加到ActionErrors中

//new ActionMessage( "userName") 是在 ApplicationResources_zh_CN.properties 中取出你设置的对应的错误信息

//name value 形式中的name

}

return error;

}

/**

* Method reset

* @param mapping

* @param request

*/

public String getUserName() {

return userName;

}

public String getPassWord() {

return passWord;

}

public void setUserName(String userName) {

this.userName = userName;

}

public void setPassWord(String passWord) {

this.passWord = passWord;

}

}

在com.xx.struts目录下的

ApplicationResources_zh_CN.properties文件设置:

userName=erro2

sttuts-config文件设置：

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.3//EN" "http://struts.apache.org/dtds/struts-config_1_3.dtd">

<struts-config>

<form-beans >

<form-bean name="loginForm" type="com.zh.struts.form.LoginForm" />

</form-beans>

<global-exceptions />

<global-forwards />

<!-- validate="true 是设置在form中是否使用 validate方法 -->

<action-mappings >

<action

validate="true"   //注意 这里的validate是必须要设置的 这是对应你的LoginForm中 的validate方法中否执行

attribute="loginForm"

input="/WEB-INF/login.jsp"

name="loginForm"

path="/login"

scope="request"

type="com.zh.struts.action.LoginAction"

cancellable="true" />

</action-mappings>

<message-resources parameter="com.zh.struts.ApplicationResources" />

</struts-config>

 jsp代码:

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

<%@taglib prefix="html" uri="http://struts.apache.org/tags-html" %>

<%

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">

-->

</head>

<body>

<h1>&nbsp;登录</h1>

<form action="/strutsTest1/login.do" method="post">

u:<input type="text" name="userName"/>&nbsp; &nbsp; <html:errors property="userName"/> <br/>    

//这里是你请求失败后返回的信息  property对应 LoginForm 中的error.add( "userName",new ActionMessage( "userName")); add方法第一个参数

p:<input type="password" name="passWord"/><br/>

<input type="submit"/>

</form>

</body>

</html>

有讲这个内容更好的资源

http://www.cnblogs.com/eflylab/archive/2007/01/08/614465.html

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