Struts（简单的Form验证）

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login.jsp

<%@ page language="java" pageEncoding="GBK"%>
<%@ taglib uri="http://jakarta.apache.org/struts/tags-bean" prefix="bean"%>
<%@ taglib uri="http://jakarta.apache.org/struts/tags-html" prefix="html"%>

<html>
<head>
  <title>JSP for LoginForm form</title>
</head>
<body>
  <html:form action="/login" focus="username">
      username : <html:text property="username"/><html:errors property="username"/><br/>
   password : <html:password property="password"/><html:errors property="password"/><br/>

   <html:submit/><html:cancel/>
  </html:form>
</body>
</html>

struts-config.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN" "http://struts.apache.org/dtds/struts-config_1_2.dtd">

<struts-config>
<data-sources />
<form-beans >
<form-bean name="loginForm" type="org.eimhe.struts.form.LoginForm" />

</form-beans>

<global-exceptions />
<global-forwards />
<action-mappings >
    <action
      attribute="loginForm"
      input="/login.jsp"
      name="loginForm"
      path="/login"
      scope="request"
      type="org.eimhe.struts.action.LoginAction" />

</action-mappings>

<message-resources parameter="org.eimhe.struts.ApplicationResources" />
</struts-config>

LoginForm.java

/*
* Generated by MyEclipse Struts
* Template path: templates/java/JavaClass.vtl
*/
package org.eimhe.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: 09-27-2006
*
* XDoclet definition:
* @struts.form name="loginForm"
*/
public class LoginForm extends ActionForm {
/*
* Generated fields
*/

/** password property */
private String password;

/** username property */
private String username;

/*
* Generated Methods
*/

/**
* Method validate
* @param mapping
* @param request
* @return ActionErrors
*/
public ActionErrors validate(ActionMapping mapping,
   HttpServletRequest request) {
  // TODO Auto-generated method stub
  ActionErrors errors=new ActionErrors();
   if(username.equals("")||username.equals("guest"))
   {
    errors.add("username",new ActionMessage("mytest.error"));
   }
  return errors;
}

/**
* Method reset
* @param mapping
* @param request
*/
public void reset(ActionMapping mapping, HttpServletRequest request) {
  username="guest";
  password="guest";
  // TODO Auto-generated method stub
}

/**
* Returns the password.
* @return String
*/
public String getPassword() {
return password;
}

/**
* Set the password.
* @param password The password to set
*/
public void setPassword(String password) {
this.password = password;
}

/**
* Returns the username.
* @return String
*/
public String getUsername() {
return username;
}

/**
* Set the username.
* @param username The username to set
*/
public void setUsername(String username) {
this.username = username;
}
}

LoginAction.java

/*
* Generated by MyEclipse Struts
* Template path: templates/java/JavaClass.vtl
*/
package org.eimhe.struts.action;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.eimhe.struts.form.LoginForm;

/**
* MyEclipse Struts
* Creation date: 09-27-2006
*
* XDoclet definition:
* @struts.action path="/login" name="loginForm" input="/login.jsp" scope="request" validate="true"
*/
public class LoginAction extends Action {
/*
* Generated Methods
*/

/**
* Method execute
* @param mapping
* @param form
* @param request
* @param response
* @return ActionForward
*/
public ActionForward execute(ActionMapping mapping, ActionForm form,
   HttpServletRequest request, HttpServletResponse response) {
  LoginForm loginForm = (LoginForm) form;// TODO Auto-generated method stub
  return null;
}
}

ApplicationResources.properties

# Resources for parameter 'org.eimhe.struts.ApplicationResources'
# Project P/eimheStruts2
mytest.error=\该\用\户\名\无\法\进\一\不\操\作

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