正则

 /// 去掉所有html标签

 

public static String clearHTMLTags(String content)
 { 
  return content.replaceAll("<[a-zA-Z]+[1-9]?[^><]*>", "").replaceAll("</[a-zA-Z]+[1-9]?>", "");
 }

 

 

/// <summary>
 /// 去掉所有html标签
 /// </summary>
 private static readonly Regex FilterAll = new Regex(
 @"(/[([^=]*)(=[^/]]*)?/][/s/S]*?/[//1/])|(?<lj>(?=[^/u4E00-/u9FA5/uFE30-/uFFA0,."");])<a/s+[^>]*>[^<]{2,}</a>(?=[^/u4E00-/u9FA5/uFE30-/uFFA0,."");]))|(?<Style><style[/s/S]+?/style>)|(?<select><select[/s/S]+?/select>)|(?<Script><script[/s/S]*?/script>)|(?<Explein></!/-/-[/s/S]*?/-/->)|(?<li><li(/s+[^>]+)?>[/s/S]*?/li>)|(?<Html></?/s*[^> ]+(/s*[^=>]+?=['""]?[^""']+?['""]?)*?[^/[<]*>)|(?<Other>&[a-zA-Z]+;)|(?<Other2>/#[a-z0-9]{6})|(?<Space>/s+)|(/&/#/d+/;)",
 RegexOptions.ExplicitCapture
 | RegexOptions.Multiline
 | RegexOptions.IgnoreCase); //(?<Link><a[/s/S]*?</a>)|
 //(?<Style><style[/s/S]+?/style>)|(?<select><select[/s/S]+?/select>)|(?<Script><script[/s/S]*?/script>)|(?<Explein></!/-/-[/s/S]*?/-/->)|(?<li><li(/s+[^>]+)?>[/s/S]*?/li>)|(?<Html></?/s*[^> ]+(/s*[^=>]+?=['""]?[^""']+?['""]?)*?[^/[<]*>)|(?<Other>&[a-zA-Z]+;)|(?<Other2>/#[a-z0-9]{6})|(?<Space>/s+)

 /// <summary>
 /// 找出title标签
 /// </summary>
 private static readonly Regex FindTitle = new Regex(
 @"</s*/?title/s*>",
 RegexOptions.ExplicitCapture
 | RegexOptions.Multiline
 | RegexOptions.IgnoreCase);

 /// <summary>
 /// 找出title标签内容
 /// </summary>
 private static readonly Regex FindTitleContent = new Regex(
 @"</s*/?title/s*>(?<Content>[/s/S]*?)</s*/?title/s*>",
 RegexOptions.ExplicitCapture
 | RegexOptions.Multiline
 | RegexOptions.IgnoreCase);

 /// <summary>
 /// 找出h 和Strong标签
 /// </summary>
 private static readonly Regex FindHStrong = new Regex(
 @"</s*/?h/s*>|</s*/?strong/s*>",
 RegexOptions.ExplicitCapture
 | RegexOptions.Multiline
 | RegexOptions.IgnoreCase);

 /// <summary>
 /// 找出p 和br标签
 /// </summary>
 private static readonly Regex FindPB = new Regex(
 @"</s*/?p/s*>|</s*br/s*/?>|</s*/?tr/s*>",
 RegexOptions.ExplicitCapture
 | RegexOptions.Multiline
 | RegexOptions.IgnoreCase);

 /// <summary>
 /// 找出nbsp标签
 /// </summary>
 private static readonly Regex FindNbsp = new Regex(
 @"&nbsp",
 RegexOptions.ExplicitCapture
 | RegexOptions.Multiline
 | RegexOptions.IgnoreCase);

 /// <summary>
 /// 找出结尾标签
 /// </summary>
 private static readonly Regex FindS = new Regex(
 @"(?<Content>[/s/S]*?)/$",
 RegexOptions.ExplicitCapture
 | RegexOptions.Multiline
 | RegexOptions.IgnoreCase);

 /// <summary>
 /// 找出是否为标准句
 /// </summary>
 private static readonly Regex IsSen = new Regex(
 @"[,.，。!！;；:：……？?《》“”""]",
 RegexOptions.ExplicitCapture
 | RegexOptions.Multiline
 | RegexOptions.IgnoreCase);

 /// <summary>
 /// 找出是否为垃圾句[strong][h]标签过多的
 /// </summary>
 private static readonly Regex IsWs = new Regex(
 @"/[/(h/)/]",
 RegexOptions.ExplicitCapture
 | RegexOptions.Multiline
 | RegexOptions.IgnoreCase);

 /// <summary>
 /// 找出是否为垃圾句冒号和·-过多的
 /// </summary>
 private static readonly Regex IsWsM = new Regex(
 @"/[·]|[－]|[：:]",
 RegexOptions.ExplicitCapture
 | RegexOptions.Multiline
 | RegexOptions.IgnoreCase);

 /// <summary>
 /// 找出是否为BBS特征
 /// </summary>
 private static readonly Regex IsBbsInfo = new Regex(
 @"第[^楼]{1,50}楼|Powered/s*/?by[/s/S]*?Dvbbs|Powered/s*/?by[/s/S]*?Discuz",
 RegexOptions.ExplicitCapture
 | RegexOptions.Multiline
 | RegexOptions.IgnoreCase);
 
 /// <summary>
 /// 取KEYWORD
 /// </summary>
 private static readonly Regex mKeyWord = new Regex(
 @"<meta/s*name/s*=/s*['""]?keywords['""]?/s*content/s*=/s*['""]?(?<KeyWords>[^'"">]*)['""]?[^>]*>|<meta/s*content/s*=/s*['""]?(?<KeyWords>[^'"">]*)['""]?/s*name/s*=/s*['""]?keywords['""]?/s*[^>]*>
",RegexOptions.ExplicitCapture| RegexOptions.Multiline| RegexOptions.IgnoreCase);

 /// <summary>
 /// 取DESCRIPTION
 /// </summary>
 private static readonly Regex mDescription = new Regex(
 @"<meta/s*name/s*=/s*['""]?description['""]?/s*content/s*=/s*['""]?(?<description>[^'"">]*)['""]?[^>]*>|<meta/s*content/s*=/s*['""]?(?<description>[^'"">]*)['""]?/s*name/s*=/s*['""]?description['""]?/s*[^>]*>
",RegexOptions.ExplicitCapture| RegexOptions.Multiline| RegexOptions.IgnoreCase);
 
 /// <summary>
 /// 取Tags
 /// </summary>
 private static readonly Regex mTag = new Regex(
 @"<meta/s*name/s*=/s*['""]?tagwords['""]?/s*content/s*=/s*['""]?(?<tagwords>[^'"">]*)['""]?[^>]*>|<meta/s*content/s*=/s*['""]?(?<tagwords>[^'"">]*)['""]?/s*name/s*=/s*['""]?tagwords['""]?/s*[^>]*>
", RegexOptions.ExplicitCapture | RegexOptions.Multiline | RegexOptions.IgnoreCase);

 /// <summary>
 /// 找出是否为垃圾句:后字符号过少，：号前无“说”字,:号后无"关于"
 /// </summary>
 private static readonly Regex IsWsMM = new Regex(
 @"^[^说/s]{0,8}?[:：].{0,10}$",
 RegexOptions.ExplicitCapture
 | RegexOptions.Multiline
 | RegexOptions.IgnoreCase);

 /// <summary>
 /// 找出spider写入的url标记
 /// </summary>
 private static readonly Regex txtUrl = new Regex(
 @"当前URL为:http://(?<URL>.*)",
 RegexOptions.ExplicitCapture
 | RegexOptions.Multiline
 | RegexOptions.IgnoreCase);

 /// <summary>
 /// 找出spider写入的锚点描述标记
 /// </summary>
 private static readonly Regex txtDescription = new Regex(
 @"当前链接描述为:(?<Describe>.*)",
 RegexOptions.ExplicitCapture
 | RegexOptions.Multiline
 | RegexOptions.IgnoreCase);

 ///// <summary>
 ///// 取需要a标签
 ///// </summary>
 //private static readonly Regex cleanFirst = new Regex(
 // @"([/u4E00-/u9FA5]|[/uFE30-/uFFA0]|[,."");])(?<Robbish1><a/s+[^>]*>)[^<]{1,6}(?<Robbish2></a>)([/u4E00-/u9FA5]|[/uFE30-/uFFA0]|[,."");])", RegexOptions.ExplicitCapture | RegexOptions.Multiline | RegexOptions.IgnoreCase);