Posted on 2008-07-10 14:05
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struts
1.login.jsp
<%@ page language="java" pageEncoding="UTF-8"%>
<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean"%>
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html"%>
<html>
<head>
<title>login</title>
</head>
<body>
<html:form action="/login">
<html:errors property="handle"/><br/>
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>
2.loginAction
/**//*
* Generated by MyEclipse Struts
* Template path: templates/java/JavaClass.vtl
*/
package com.my.struts.action;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.Globals;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
import org.apache.struts.action.ActionMessages;
import com.my.struts.form.LoginForm;
/** *//**
* MyEclipse Struts
* Creation date: 06-18-2008
*
* XDoclet definition:
* @struts.action path="/login" name="loginForm" input="/form/login.jsp" scope="request" validate="true"
* @struts.action-forward name="ok" path="/login/login_suc.jsp"
*/
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)throws Exception {
LoginForm loginForm = (LoginForm) form;// TODO Auto-generated method stub
String username=loginForm.getUsername();
String password=loginForm.getPassword();
if(username.equals("admin")&&password.equals("111111"))
return mapping.findForward("ok");
//--------------------------------------------------------------------------------
//第一种方法
ActionErrors errors=new ActionErrors();
ActionMessage msg;
msg=new ActionMessage("login.failed");
errors.add("handle",msg);
saveErrors(request, errors);
//--------------------------------------------------------------------------------
//第二种方法(把login.jsp中<html:errors property="handle"/><br/>改为<html:errors /><br/>)
// ActionMessages msg=this.getMessages(request);
// msg.add(Globals.ERROR_KEY, new ActionMessage("login.failed2"));
// this.addErrors(request, msg);
//--------------------------------------------------------------------------------
return mapping.getInputForward();
}
}
3.ApplicationResources.properties
# Resources for parameter 'com.my.struts.ApplicationResources'
# Project MessageTest
login.failed=<font color="#FF0044">错误的用户名或密码</font>
login.failed2=<font color="#FF0044">出错啦!</font>
当然啦,也可以能过loginform里的validate来实现:
ActionErrors errors = new ActionErrors(); // create ActionErrors instance
ActionMessage msg;
if (username==null||username.length() < 1) {
msg = new ActionMessage("error.notnull", username);
errors.add("username", msg);
}
if (password==null||password.length() < 1) {
msg = new ActionMessage("error.notnull", password);
errors.add("password", msg);
}
return errors;