正則的那些事，備忘…

最近由於工作項目中的需要，開始關注起了正則，初識正則，看著著急的同時又表示一頭霧水。。。還好現在工作已經告一段落了，非常非常感謝罈子裡面前輩的協助，當然也有自身的學習。O(∩_∩)O

工作之餘，把所用到的正則簡單的整理了下，備忘，同時也給遇到類似問題的童鞋做個參考。

規則：

1.根據id擷取標籤裡面的內容

2.擷取頁面中的img及img裡面的屬性src的內容

3.擷取所有的script

4.特殊取值：如取 DATA.groupList = [{...}]裡面的內容 廢話不多說了，直接貼代碼了。。

下面這個是要用到的一個字串:

<img class="avatar" src="/cgi-bin/getheadimg?fakeid=2391433120&amp;r=835720"><script type="text/javascript">WXM.DATA.userinfo = {};WXM.DATA = {ROOT : WXM.ROOT,userinfo : {NickName : "yoyo",FakeID : "2391433120"},nav : [{_id: 'home',name : "首頁", link : '/cgi-bin/indexpage?t=wxm-index&lang=zh_CN'}], };</script> <script type="json" id="json-setting">{"username":"haha","signature":"","country":"中國","province":"上海","city":"浦東新區","verifyInfo":"ready&nbsp;go?","bindUserName":""}</script> <script type="text/javascript">window.WXM && (function(WXM, jq, win){  DATA.title = "使用者管理";  DATA.groupList = [                      {        id: '0',        name: defaultGroupName[0] || "預設組",        num : '0'*1      }, {        id: '100',        name: defaultGroupName[100] || "F",        num : '2'*1      }               ];  })(WXM, jQuery, window);</script> <script type="text/javascript">WXM.DATA.userinfo = {};WXM.DATA = {ROOT : WXM.ROOT,userinfo : {NickName : "yoyo",FakeID : "2391433120"},nav : [{_id: 'home',name : "首頁", link : '/cgi-bin/indexpage?t=wxm-index&lang=zh_CN'}]

};</script> 

完整的代碼如下:

C#:codeusing System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;using System.Text;using System.Text.RegularExpressions;public partial class zz : System.Web.UI.Page{    protected void Page_Load(object sender, EventArgs e)    {        //*****尋找id="json-setting"的標籤及內容  此處擷取到的是一個script,所以無法在頁面上顯示文本，只有查看網頁源碼才能看到*****/         string pattern = @"<(?<HtmlTag>[\w]+)[^>]*\s[iI][dD]=(?<Quote>[""']?)json-setting(?(Quote)\k<Quote>)[""']?[^>]*>((?<Nested><\k<HtmlTag>[^>]*>)|</\k<HtmlTag>>(?<-Nested>)|.*?)*</\k<HtmlTag>>";                //*****尋找 DATA.groupList = [{...}]裡面的內容*****/        //string pattern = @"(?<=DATA\.groupList\s*=\s*\[)((?<g>\[)|(?<-g>\])|[^\]\[])*(?(g)(?!))(?=\])";         //*****尋找出所有的script*****//         string pattern1 = @"<script[^>]*?>.*?</script>|<script[^>]*>[\d\D]*?</script>";                 //******尋找圖片******//         //string pattern2 = "<img class=\"(.*?)\".*/>"; //帥選出img         //string pattern2 = "src=\"(?<value>.*?)\""; //擷取圖片src的值         MatchCollection m = Regex.Matches(GetHtm(), pattern, RegexOptions.IgnoreCase | RegexOptions.Multiline | RegexOptions.Singleline);         string str = "";         if (m.Count > 0)         {             str = m[0].Groups[0].Value;             Response.Write("擷取成功！" + str);         }         else         {             Response.Write("擷取失敗!");         }         Fn(GetHtm(),pattern1);         //Fn(GetHtm(),pattern2);    }    public void Fn(string strhtm,string pattern)    {        MatchCollection m = Regex.Matches(strhtm, pattern, RegexOptions.IgnoreCase | RegexOptions.Multiline | RegexOptions.Singleline);        string str = "";        if (m.Count > 0)        {            foreach (Match mc in m)            {                str+= mc.Value;                //str+ = mc.Groups["value"].Value; //擷取圖片src的值            }            Response.Write("擷取成功！" + str);        }        else        {            Response.Write("擷取失敗!");        }    }      public string GetHtm()    {        StringBuilder sb = new StringBuilder();        sb.AppendLine("<img class=\"avatar\" src=\"/cgi-bin/getheadimg?fakeid=2391433120&r=835720\" />");        sb.AppendLine("<script type=\"text/javascript\">");        sb.AppendLine("WXM.DATA.userinfo = {};");        sb.AppendLine("WXM.DATA = {");        sb.AppendLine("ROOT : WXM.ROOT,");        sb.AppendLine("userinfo : {");        sb.AppendLine("NickName : \"yoyo\",");        sb.AppendLine("FakeID : \"2391433120\"");        sb.AppendLine("},");        sb.AppendLine("nav : [");        sb.AppendLine("{");        sb.AppendLine("_id: 'home',");        sb.AppendLine("name : \"首頁\", ");        sb.AppendLine("link : '/cgi-bin/indexpage?t=wxm-index&lang=zh_CN'");        sb.AppendLine("}],");        sb.AppendLine("");        sb.AppendLine("};");        sb.AppendLine("");        sb.AppendLine("</script>");        sb.AppendLine(" <script type=\"json\" id=\"json-setting\">");        sb.AppendLine("{\"username\":\"haha\",\"signature\":\"\",\"country\":\"中國\",\"province\":\"上海\",\"city\":\"浦東新");        sb.AppendLine("區\",\"verifyInfo\":\"ready go?\",\"bindUserName\":\"\"}</script>");        sb.AppendLine("");        sb.AppendLine(" <script type=\"text/javascript\">");        sb.AppendLine("window.WXM && (function(WXM, jq, win){");        sb.AppendLine("");        sb.AppendLine("  DATA.title = \"使用者管理\";");        sb.AppendLine("  DATA.groupList = [");        sb.AppendLine("                      {");        sb.AppendLine("        id: '0',");        sb.AppendLine("        name: defaultGroupName[0] || \"預設組\",");        sb.AppendLine("        num : '0'*1");        sb.AppendLine("      }, {");        sb.AppendLine("        id: '100',");        sb.AppendLine("        name: defaultGroupName[100] || \"F\",");        sb.AppendLine("        num : '2'*1");        sb.AppendLine("      }             ");        sb.AppendLine("  ];");        sb.AppendLine("  ");        sb.AppendLine("})(WXM, jQuery, window);");        sb.AppendLine("</script>");        sb.AppendLine("");        sb.AppendLine(" <script type=\"text/javascript\">");        sb.AppendLine("WXM.DATA.userinfo = {};");        sb.AppendLine("WXM.DATA = {");        sb.AppendLine("ROOT : WXM.ROOT,");        sb.AppendLine("");        sb.AppendLine("userinfo : {");        sb.AppendLine("NickName : \"yoyo\",");        sb.AppendLine("FakeID : \"2391433120\"");        sb.AppendLine("},");        sb.AppendLine("nav : [");        sb.AppendLine("{");        sb.AppendLine("_id: 'home',");        sb.AppendLine("name : \"首頁\", ");        sb.AppendLine("link : '/cgi-bin/indexpage?t=wxm-index&lang=zh_CN'");        sb.AppendLine("}");        sb.AppendLine("]");        sb.AppendLine("};</script> ");        return sb.ToString();           }}