java实现FTP功能（源代码）

☆蓝色梦想☆ — Thu, 08 Jun 2006 15:17:00 GMT

☆蓝色梦想☆ 2006-06-08 23:17 发表评论

仿google判断用户密码强度

☆蓝色梦想☆ — Thu, 08 Jun 2006 15:14:00 GMT

灵感来自GOOGLE--Gmail的注册表单，这是结合XMLHTTP和servlet以及客户端脚本Javascript来实现的一个给死板的表单程序增加亲和力的一个小玩意。下午看到遂花了几小时模仿着写了一个。前端代码均来自GMAIL的表单注册那里，后段验证密码强度的servlet是自己做的，算法有待商戳不过效果算是出来了。
·[xml,jsp,servlet]仿google判断用户密码强度

先来看客户端的JS代码，命名文 gvUserReg.js

程序代码：

// this code powered by google
var agt = navigator.userAgent.toLowerCase();
var is_op = (agt.indexOf("opera") != -1);
var is_ie = (agt.indexOf("msie") != -1) && document.all && !is_op;
var is_ie5 = (agt.indexOf("msie 5") != -1) && document.all && !is_op;

function CreateXmlHttpReq(handler) {
  var xmlhttp = null;
  if (is_ie) {
    // Guaranteed to be ie5 or ie6
    var control = (is_ie5) ? "Microsoft.XMLHTTP" : "Msxml2.XMLHTTP";
    try {
      xmlhttp = new ActiveXObject(control);
      xmlhttp.onreadystatechange = handler;
    } catch (ex) {
      // TODO: better help message
      alert("You need to enable active scripting and activeX controls");
    }
  } else {
    // Mozilla
    xmlhttp = new XMLHttpRequest();
    xmlhttp.onload = handler;
    xmlhttp.onerror = handler;
  }
  return xmlhttp;
}
alert();
// XMLHttp send POST request
function XmlHttpPOST(xmlhttp, url, data) {
  try {
    xmlhttp.open("POST", url, true);
    xmlhttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8");
    xmlhttp.send(data);

  } catch (ex) {
    // do nothing
  }
}

// XMLHttp send GEt request
function XmlHttpGET(xmlhttp, url) {
  try {
    xmlhttp.open("GET", url, true);
    xmlhttp.send(null);
  } catch (ex) {
    // do nothing
  }
}
var myxmlhttp;
  var isBrowserCompatible;
  var hidePasswordBar;
  ratingMsgs = new Array(6);
  ratingMsgColors = new Array(6);
  barColors = new Array(6);
  ratingMsgs[0] = "未评级";
  ratingMsgs[1] = "太短";
  ratingMsgs[2] = "弱";
  ratingMsgs[3] = "一般";
  ratingMsgs[4] = "很好";
  ratingMsgs[5] = "极佳"; //If the password server is down
  ratingMsgColors[0] = "#808080";
  ratingMsgColors[1] = "#da5301";
  ratingMsgColors[2] = "#ccbe00";
  ratingMsgColors[3] = "#1e91ce";
  ratingMsgColors[4] = "#0000FF";
  ratingMsgColors[5] = "#ff0000";
  barColors[0] = "#e0e0e0";
  barColors[1] = "#da5301";
  barColors[2] = "#f0e54b";
  barColors[3] = "#1e91ce";
  barColors[4] = "#0000FF";
  barColors[5] = "#ff0000";
  hidePasswordBar = false;
  function CreateRateUserPassReq(formKey) {
    if (!isBrowserCompatible) {
      return;
    }
    var passwd = document.forms[formKey].gvUserPass.value;
var min_passwd_len = 6;
    var passwdKey = "passwd";
    if (passwd.length < min_passwd_len) {
     DrawBar(1);
    }else{
     //We need to escape the password now so it won't mess up with length test
      passwd = escape(passwd);
      var params = passwdKey + "=" + passwd
      myxmlhttp = CreateXmlHttpReq(RateUserPassXmlHttpHandler);
      XmlHttpPOST(myxmlhttp, "/club/rateUserPass.gv", params);
    }
  }

  function getElement(name) {
    if (document.all) {
      return document.all(name);
    }
    return document.getElementById(name);
  }

  function RateUserPassXmlHttpHandler() {
    // Can't check status since safari doesn't support it
    if (myxmlhttp.readyState !=4 ) {
      return;
    }
    rating = parseInt(myxmlhttp.responseText);
    DrawBar(rating);
  }

  function DrawBar(rating) {
    var posbar = getElement('posBar');
    var negbar = getElement('negBar');
    var passwdRating = getElement('passwdRating');
    var barLength = getElement('passwdBarDiv').width;
    if (rating >= 0 && rating <= 5) {  //We successfully got a rating
      posbar.style.width = barLength / 5 * rating;
      negbar.style.width = barLength / 5 * (5 - rating);
    } else {
      posbar.style.width = 0;
      negbar.style.width = barLength;
      rating = 5; // Not rated Rating
    }
    posbar.style.background = barColors[rating]
    passwdRating.innerHTML = " + ratingMsgColors[rating] +
                             "'>" + ratingMsgs[rating] + "";
  }

表单部分只是列出密码选框部分

        "100">"width:200 px" onKeyUp="CreateRateUserPassReq('Gforms')" name="gvUserPass" type="password" id="gvUserPass" size="30" maxlength="30" />
        "10">
"#">密码强度：

"passwdBarDiv" cellSpacing=0 cellPadding=0 width="200"  bgColor="#ffffff" border=0>

"posBar" width="0%" bgColor="#e0e0e0" height="4">
"negBar" width="100%" bgColor="#e0e0e0"  height="4">

程序代码：

要引入刚才那个JS文件
"javascript" src="gvUserReg.js">
"userRegPost.jsp" method="post"  name="Gforms" onSubmit="return CheckForm();">
"100%"  border="0" cellpadding="0" cellspacing="0">

"200" border=0 cellPadding=0 cellSpacing=0 >

"passwdRating">太短

"javascript">

Servlet部分，验证密码强度的JAVA类

程序代码：

/*
* 2005-12-14
* Made in GamVan
*/
package com.gamvan.club.servlet;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.gamvan.tools.EncodeString;
/**
* @author GamVan by 我容易么我
* Powered by GamVan.com
*/
public class RateUserPass extends HttpServlet {
private static final long serialVersionUID = 1L;
private int rate = 0;

/**
* 口令强弱等级判定,强度算法有待商戳，功能基本实现
* @param pass
* @return
* 2005-12-14 16:55:03 Made In GamVan
* com.gamvan.club.servlet
*/
public int rateUserPass(String pass){
/*
* i 值指示口令等级
* 0 不合法口令
* 1 太短
* 2 弱
* 3 一般
* 4 很好
* 5 极佳
*/
int i = 0;
if(pass==null || pass.length()==0){
return 0;
}
int hasLetter = EncodeString.matcherStr(pass,"[a-zA-Z]","").length();
int hasNumber = EncodeString.matcherStr(pass,"[0-9]","").length();
int passLen = pass.length();
if(passLen>=6){
/* 如果仅包含数字或仅包含字母 */
if((passLen-hasLetter)==0 || (passLen-hasNumber)==0){
if(passLen<8){
i = 2;
}else {
i = 3;
}
}
/* 如果口令大于6位且即包含数字又包含字母 */
else if(hasLetter>0 && hasNumber>0){
if(passLen>=10){
i = 5;
}else if(passLen>=8){
i = 4;
}else{
i = 3;
}
}
/* 如果既不包含数字又不包含字母 */
else if(hasLetter==0 && hasNumber==0){
if(passLen>=7){
i = 5;
}else{
i = 4;
}
}
/* 字母或数字有一方为0 */
else if(hasNumber==0||hasLetter==0){
if((passLen-hasLetter)==0 || (passLen-hasNumber)==0){
i = 2;
}
/*
* 字母数字任意一种类型小于6且总长度大于等于6
* 则说明此密码是字母或数字加任意其他字符组合而成
*/
else{
if(passLen>8){
i = 5;
}else if(passLen==8){
i = 4;
}else{
i = 3;
}
}
}
}else{ //口令小于6位则显示太短
if(passLen>0){
i = 1; //口令太短
}else{
i = 0;
}
}
return i;
}

public void service(HttpServletRequest request,HttpServletResponse response)
throws ServletException, IOException
{
String userPass = request.getParameter("passwd");
rate = rateUserPass(userPass);
response.setContentType("text/HTML;charset=UTF-8");
PrintWriter out = response.getWriter();
out.print(rate);
out.close();
if(true)return;
return ;
}

}

下面这个是强度验证的servlet用到的一个正则表达式工具类，这里我只把我们这篇文章用到的其中一个方法贴出来给大家

程序代码：

/*
* Made in GamVan
*/
package com.gamvan.tools;
import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import sun.misc.BASE64Encoder;
import java.util.regex.*;
import com.gamvan.tools.MD5;
/**
* 字符串操作集合类
* @author GamVan by 我容易么我
* Powered by GamVan.com
*/
public class EncodeString{
    /**
     * 循环找出匹配内容
     * @param str
     * @param cp
     * @param s
     * @return
     * 2005-12-11 18:45:25 Made In GamVan
     * com.gamvan.tools
     */
    public static String matcherStr(String str, String cp, String s){
        if(str==null || str.equals("")){
            return "";
        }
        String txt = new String();
        txt = str;
        if(str!=null && !str.equals("")){
            txt = str;
            Pattern p = Pattern.compile(cp,2); //参数2表示大小写不区分
            Matcher m = p.matcher(txt);
            StringBuffer sb = new StringBuffer();
            int i=0;
            boolean result = m.find();
            //使用循环将句子里所有匹配的内容找出并替换再将内容加到sb里
            while(result) {
                i++;
                sb.append(m.group());
                sb.append(s);
                //继续查找下一个匹配对象
                result = m.find();
            }
            txt = String.valueOf(sb);
        }else{
            txt = "";
        }
        return txt;
    }
}

地球人都知道servlet需要部署才能用我这里这个应用在web.xml是这么部署的！大家可以根据需要自己改。

程序代码：

RateUserPass

com.gamvan.club.servlet.RateUserPass

RateUserPass

/club/rateUserPass.gv

☆蓝色梦想☆ 2006-06-08 23:14 发表评论

这里发布的大多是关于java的录像，希望大家喜欢

☆蓝色梦想☆ — Fri, 06 Jan 2006 09:53:00 GMT

这里发布的大多是关于java的录像，希望大家喜欢

☆蓝色梦想☆ 2006-01-06 17:53 发表评论

BlogJava-☆蓝色梦想☆-随笔分类-Other

在线印章

java实现FTP功能（源代码）

仿google判断用户密码强度

这里发布的大多是关于java的录像，希望大家喜欢