正则表达式：为站内链接加上域名

2010-01-24 11:42 敏捷的水阅读(1356) 评论(0) 编辑收藏举报

1、测试文本

<a href='http://search/a.aspx'>home</a>
 
<a href='/aab/bb'>hello</a><a href='http://www.sohu.com'>sohu</a><p>sdfsf</p>
 
<a href="/aab/bb">hello</a>
<div>hello world</div>
<a href="aaa/bb"></a>

2、为站内链接加上域名

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.IO;
 
namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            string s = File.ReadAllText(@"c:\a.txt");
 
            //给所有非http的链接加上域名，链接前无/
            string d = Regex.Replace(s, 
                @"<a\s+href\s?=\s?[\'|\""]((?!http)/.*)?[\""\']",
 
                @"<a href=""www.cnblogs.com$1""", 
 
                RegexOptions.Compiled|RegexOptions.IgnoreCase);
 
            //给所有非http的链接加上域名，链接前有/
            string e = Regex.Replace(d,
                @"<a\s+href\s?=\s?[\'|\""]((?!http)(?!/).*)?[\""\']",
 
                @"<a href=""www.cnblogs.com/$1""",
 
                RegexOptions.Compiled | RegexOptions.IgnoreCase);
 
            // Console.WriteLine(d);
 
            Console.WriteLine(e);
 
            Console.Read();
 
        }
    }
}