//index.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<s:action name="index" namespace="/" executeResult="true" var="rd"/>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
</body>
</html>index.jsp里面只有一个action请求。<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<package name="core" namespace="/" extends="struts-default">
<action name="index" class="userLoginAction" method="getRandomKey">
<result name="success">login.jsp</result>
</action>
<action name="login" class="userLoginAction" method="login">
<result name="success">main.jsp</result>
<result name="input">login.jsp</result>
<result name="error">login.jsp</result>
</action>
</package>
</struts>我引入了Spirng来管理类。/**
* @author dell
*
*/
@Component
@Scope("prototype")
public class UserLoginAction extends BaseAction{
/**
* 接收JSP传来的账号与密码
*/
private Users user;
/**
* 随机字符串作为加密密钥
*/
private String randomString;
/**
* 生成随机字符串作为密钥
*/
public String getRandomKey() {
String base = "abcdefghijklmnopqrstuvwxyz0123456789";
Random random = new Random();
StringBuffer sb = new StringBuffer();
int length = 6;
for (int i = 0; i < length; i++) {
int number = random.nextInt(base.length());
sb.append(base.charAt(number));
}
// logger.info("randomString: " + sb.toString());
this.randomString = sb.toString();
return SUCCESS;
}
}我们再看看返回的login.jsp<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>短波应急接入网管理系统</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<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" />
<link rel="shortcut icon" href="logo.ico" type="image/x-icon" />
<link rel="stylesheet" type="text/css" href="css/common.css">
<script type="text/javascript" src="easyui/jquery.min.js"></script>
<script type="text/javascript" src="easyui/jquery.easyui.min.js"></script>
<script type="text/javascript" src="js/md5.js"></script>
</head>
<body onload="document.getElementById('loginName').focus()">
<div id="page">
<div class="t">
<center>
<span class="flderr">
<s:fielderror>
<s:param>error_msg</s:param>
</s:fielderror> </span>
</center>
</div>
<form action="login" id="login" method="post" class="ym_login_form" >
<div class="ymlf_row">
<span>用户编号：</span>
<input type="text" id="loginName" name="user.userName" class="ymlf_name" />
</div>
<div class="ymlf_row">
<span>用户密码：</span>
<input type="password" id="loginPassword" name="user.passWord" class="ymlf_password" />
<input type="hidden" id="randomString" name="randomString" value=<s:property value="randomString"/> />
//为什么要加上randomString?自己想一想
</div>
<div class="ymlf_btn_box">
<img src="images/bt1.png" class="sub" onclick="mysubmit()" />
<img src="images/bt2.png" class="res" onclick="myreset()" />
</div>
</form>
</div>
</body>
<script type="text/javascript">
function myreset(){
$('#login').form('clear');
}
function mysubmit(){
var frm = document.getElementById("login");
if(check(frm)==true)
frm.submit();
}
function check(frm) {
var lgnName = frm.loginName.value;
var lgnPassword = frm.loginPassword.value;
if(lgnName=='') {
$('.flderr').html("请输入用户名");
frm.loginName.focus();
return false;
}
if(lgnPassword=='') {
$('.flderr').html("请输入密码");
frm.loginPassword.focus();
return false;
}
var randomString = '<s:property value="randomString" />';
lgnPassword = hex_md5(lgnPassword);
lgnPassword = lgnPassword+randomString;
lgnPassword = hex_md5(lgnPassword);
$('#login').form('load',{
'user.passWord':lgnPassword
});
return true;
}
document.onkeypress =
function(event) {
var e = event||window.event;
var ele = e.target||e.srcElement;
var k = e.which||e.keyCode;
if(k == 13 && ele.id == 'loginPassword')
mysubmit();
}
</script>
</html>提交的结果给了login那个aciton,最后调用的是UserLoginAction的login方法 /**
* 用户登录处理
*
* @return "center_login" or "dept_login" or ERROR
*/
@SuppressWarnings("unchecked")
public String login() {
if (user == null || user.getUserName() == null
|| user.getPassWord() == null) {
return ERROR;
}
// 从客户端传来的加密后的密码
byte[] clientPassword = user.getPassWord().trim().getBytes();
//逻辑就是这样 我自己写的dao就不给大家看了
//根据前台传过来的用户名从数据库取得用户
List<Users> resultList = (List<Users>) utilDAO.findListByProperty("Users", "userName",user.getUserName() ,"");
if (resultList.isEmpty()) { // 该账号不存在
this.addFieldError("error_msg", "该账号不存在");
logger.info("该账号不存在!!");
return ERROR;
} else {
user = resultList.get(0);
// 对用户真实的密码作同样的加密处理
String passwd = (String) user.getPassWord();
System.out.println("passwd 真实的:"+passwd);
MessageDigest md5 = null;
byte[] serverPassword = null;
try {
md5 = MessageDigest.getInstance("MD5");
md5.update(passwd.getBytes());
passwd = new BigInteger(1, md5.digest()).toString(16);
//md5（890617）后的之为09aaa5d27d99ad09a129a0734d52519b
//字符串以0开头，用BigInteger会把开头的0截去，导致位数减少，所以需要判断并补0
if (passwd.length() < 32) {
for (int i = 0; i <32- passwd.length(); i++) {
passwd = '0' + passwd;
}
}
passwd = passwd + this.randomString; //从前台通过s:hidden传来的randomString
System.out.println(randomString+" aaaa"+" "+this);
md5.update(passwd.getBytes());
serverPassword = (new BigInteger(1, md5.digest()).toString(16))
.getBytes();
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
if (!MessageDigest.isEqual(clientPassword, serverPassword)) {
this.addFieldError("error_msg", "用户名或密码错误");
logger.info("用户名或密码错误");
return ERROR;
}
this.getSession().put("user", user);
logger.info("登陆成功");
getLevel();
return SUCCESS;
}
}
在改写这个功能的时候,遇到很多问题。对就这么一个小小的登陆,实在是没有想到会碰到那么多问题。
我没有办法,最后把让后台产生随机字符串的action调用放到了一个新的index.jsp里面,这个页面的唯一作用就是调用index这个action,返回的结果给login.jsp。
那么又出了一个新问题
原文：http://blog.csdn.net/dlf123321/article/details/45276459