ï»??xml version="1.0" encoding="utf-8" standalone="yes"?>麻豆精品99,国产精品视频网,精品视频在线看http://www.aygfsteel.com/J2EEHOME/category/35833.htmlOne Target,One Dreamzh-cnFri, 07 Nov 2008 16:09:50 GMTFri, 07 Nov 2008 16:09:50 GMT60- JSPã€Strutsé¿å…Formé‡å¤æäº¤çš„å‡ ¿Uæ–¹æ¡?/title><link>http://www.aygfsteel.com/J2EEHOME/archive/2008/11/07/239345.html</link><dc:creator>J2EE Home工作å®?/dc:creator><author>J2EE Home工作å®?/author><pubDate>Fri, 07 Nov 2008 15:38:00 GMT</pubDate><guid>http://www.aygfsteel.com/J2EEHOME/archive/2008/11/07/239345.html</guid><wfw:comment>http://www.aygfsteel.com/J2EEHOME/comments/239345.html</wfw:comment><comments>http://www.aygfsteel.com/J2EEHOME/archive/2008/11/07/239345.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.aygfsteel.com/J2EEHOME/comments/commentRss/239345.html</wfw:commentRss><trackback:ping>http://www.aygfsteel.com/J2EEHOME/services/trackbacks/239345.html</trackback:ping><description><![CDATA[1.javascript åQŒè®¾¾|®ä¸€ä¸ªå˜é‡ï¼Œåªå…许æ交一‹Æ¡ã€‚　　<br />
　　　　<br />
　　2 ˜q˜æ˜¯javascriptåQŒå°†æ交按钮或者image¾|®äØ“disable　　<br />
　　　　 onsubmit="getElById('submitInput').disabled = true; return true;"> 　　<br />
　　　<br />
　　　　<br />
　　3 利用strutsçš„åŒæ¥ä×o牌机制　　 <br />
　　利用åŒæ¥ä»¤ç‰ŒåQˆTokenåQ‰æœºåˆ¶æ¥è§£å†³Web应用ä¸é‡å¤æ交的问题åQŒStruts也给å‡ÞZº†ä¸€ä¸ªå‚考实现ã€?<br />
　　基本原ç†åQšã€€ <br />
　　æœåŠ¡å™¨ç«¯åœ¨å¤„ç†åˆ°è¾„¡š„è¯äh±‚之å‰åQŒä¼šž®†è¯·æ±‚ä¸åŒ…å«çš„ä×o牌å€ég¸Žä¿å˜åœ¨å½“å‰ç”¨æˆ·ä¼šè¯ä¸çš„ä×o牌å€ÆD¿›è¡Œæ¯”较，看是å¦åŒ¹é…。在处ç†å®Œè¯¥è¯äh±‚åŽï¼Œä¸”在½{”å¤å‘é€ç»™å®¢æˆ·ç«¯ä¹‹å‰ï¼Œž®†ä¼šäº§ç”Ÿä¸€ä¸ªæ–°çš„ä×o牌，该ä×oç‰Œé™¤ä¼ ç»™å®¢æˆ·ç«¯ä»¥å¤–ï¼Œä¹Ÿä¼šž®†ç”¨æˆ·ä¼šè¯ä¸ä¿å˜çš„旧的ä×o牌进行替æ¢ã€‚è¿™æ ·å¦‚æžœç”¨æˆ·å›žé€€åˆ°åˆšæ‰çš„æ交™åµé¢òq¶å†‹Æ¡æ交的è¯ï¼Œå®¢æˆ·ç«¯ä¼ ˜q‡æ¥çš„ä×o牌就和æœåŠ¡å™¨ç«¯çš„令牌ä¸ä¸€è‡ß_¼Œä»Žè€Œæœ‰æ•ˆåœ°é˜²æ¢äº†é‡å¤æ交的å‘生。　<font face="Times New Roman">
<p><br />
　　if (isTokenValid(request, true)) {<br />
　　 // your code here<br />
　　 return mapping.findForward("success");<br />
　　} else {<br />
　　 saveToken(request);<br />
　　 return mapping.findForward("submitagain");<br />
　　}　<br />
　　Strutsæ ÒŽ®ç”¨æˆ·ä¼šè¯ID和当å‰ç³»¾lŸæ—¶é—´æ¥ç”Ÿæˆä¸€ä¸ªå”¯ä¸€åQˆå¯¹äºŽæ¯ä¸ªä¼šè¯ï¼‰ä»¤ç‰Œçš„，具体实现å¯ä»¥å‚考TokenProcessor¾cÖM¸çš„generateToken()æ–ÒŽ³•ã€‚　　<br />
　　1. //验è¯äº‹åŠ¡æŽ§åˆ¶ä»¤ç‰Œ,ä¼šè‡ªåŠ¨æ ¹æ®sessionä¸æ ‡è¯†ç”Ÿæˆä¸€ä¸ªéšå«input代表令牌åQŒé˜²æ¢ä¸¤‹Æ¡æäº?br />
　　2. 在actionä¸ï¼šã€€ã€€ <br />
　　 //　　 // value="6aa35341f25184fd996c4c918255c3ae"></p>
<p>　　 if (!isTokenValid(request))<br />
errors.add(ActionErrors.GLOBAL_ERROR,<br />
　　 new ActionError("error.transaction.token"));<br />
　　 resetToken(request); //åˆ é™¤sessionä¸çš„令牌　　<br />
　　3. action有这æ ïLš„一个方法生æˆä×o牌　　</p>
<p>　　 protected String generateToken(HttpServletRequest request) ...{　　<br />
　　 HttpSession session = request.getSession();<br />
　　 try ...{<br />
　　 byte id[] = session.getId().getBytes();<br />
　　 byte now[] =<br />
　　 new Long(System.currentTimeMillis()).toString().getBytes();<br />
　　 MessageDigest md = MessageDigest.getInstance("MD5");<br />
　　 md.update(id);<br />
　　 md.update(now);<br />
　　 return (toHex(md.digest()));<br />
　　 } catch (IllegalStateException e) ...{<br />
　　 return (null);<br />
　　 } catch (NoSuchAlgorithmException e) ...{<br />
　　 return (null);<br />
　　 }<br />
　　 }<br />
<br />
在更新的时候防æ¢æŒ‰é’®é‡å¤ç‚¹å‡»ï¼Œä¸»è¦æ˜¯ç”¨Sessionæ¥åšåˆ¤æ–<br />
在JSP/Servletä¸å¯ä»?/p>
<p>SynchroToken.java<br />
package com.lims.util;<br />
import org.apache.struts.util.*;<br />
import javax.servlet.http.*;<br />
import javax.servlet.jsp.*;<br />
import org.apache.struts.action.*;<br />
/**<br />
*</p>
<p>Title: SynchroToken</p>
<p><br />
*<br />
Description:</p>
<p><br />
*<br />
Copyright: Copyright (c) 2004</p>
<p><br />
*<br />
Company: NetStar</p>
<p><br />
* @author Jstar<br />
* @version 1.0<br />
* Created in 2004/04/21<br />
*/<br />
public class SynchroToken{<br />
public final static java.lang.String TOKEN_NAME = "_token";<br />
public static boolean checkToken (HttpServletRequest request){<br />
boolean isEqual = false;<br />
HttpSession session = request.getSession ();<br />
String formToken = request.getParameter (TOKEN_NAME);<br />
String sessionToken = (String)session.getAttribute (TOKEN_NAME);<br />
System.out.println ("formToken: " + formToken + " sessionToken: " +<br />
sessionToken);<br />
if (formToken != null && sessionToken == null){<br />
session.setAttribute (TOKEN_NAME, formToken);<br />
isEqual = true;<br />
}<br />
return isEqual;<br />
}<br />
/**<br />
* Insert the method's description here.<br />
* Creation date: (4/19/2004 3:23:25 PM)<br />
* @return java.lang.String<br />
* @param request javax.servlet.http.HttpServletRequest<br />
*/<br />
public static String getToken (HttpServletRequest request){<br />
String token = "" + System.currentTimeMillis ();<br />
HttpSession session = request.getSession ();<br />
if (session != null){<br />
session.removeAttribute (TOKEN_NAME);<br />
}<br />
return token;z<br />
}<br />
/**<br />
* Insert the method's description here.<br />
* Creation date: (4/19/2004 3:24:10 PM)<br />
* @return java.lang.String<br />
*/<br />
final static java.lang.String getTOKEN_NAME (){<br />
return TOKEN_NAME;<br />
}<br />
public static String message (PageContext pageContext, String key) throws<br />
JspException{<br />
return RequestUtils.message (pageContext, null, null, key);<br />
}<br />
}</font></p>
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