Question

.replace(/(\w+)\_(\w+)(\.css)/,"$1_"+src+"$3")

请问(/(\w+)\_(\w+)(\.css)/,"是什么意思？\w+是什么意思？\_是什么意思？(\.css)/是什么意思？/(\w+)是什么意思？

Answer 1

\w 匹配包括下划线的任何单词字符。等价于'[A-Za-z0-9_]'。
+ 匹配前面的子表达式一次或多次。例如，'zo+' 能匹配 "zo" 以及 "zoo"，但不能匹配 "z"。+ 等价于 {1,}。
(/(\w+)\_(\w+)(\.css)/, 就是 类似 a10_b1.css这样的字符串

Answer 2

tatic string DropHtml(object HtmlString)
{
string Htmlstring = HtmlString.ToString();
//删除脚本
Htmlstring = Regex.Replace(Htmlstring, @"<script[^>]*?>.*?</script>", "", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"<style[^>]*?>[\s\S]*?<\/style>", "", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"<w:.*>", "", RegexOptions.IgnoreCase);
//删除HTML
Htmlstring = Regex.Replace(Htmlstring, @"<(.[^>]*)>", "", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"([\r\n])[\s]+", "", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"-->", "", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"<!--.*", "", RegexOptions.IgnoreCase);

Htmlstring = Regex.Replace(Htmlstring, @"&(quot|#34);", "\"", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(amp|#38);", "&", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(lt|#60);", "<", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(gt|#62);", ">", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(nbsp|#160);", " ", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(iexcl|#161);", "\xa1", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(cent|#162);", "\xa2", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(pound|#163);", "\xa3", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&(copy|#169);", "\xa9", RegexOptions.IgnoreCase);
Htmlstring = Regex.Replace(Htmlstring, @"&#(\d+);", "", RegexOptions.IgnoreCase);

Htmlstring.Replace("<", "");
Htmlstring.Replace(">", "");
Htmlstring.Replace("\r\n", "");
//Htmlstring = System.Web.HttpContext.Current.Server.HtmlEncode(Htmlstring).Trim();

return Htmlstring;
}

Answer 3

百度 正则表达式
http://baike.baidu.com/view/94238.htm