Regex实例

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;

namespace RegexTest
{
    class Program
    {
        static void Main(string[] args)
        {
            string msg = "Welcome to China come comecome";

            var matchs = Regex.Matches(msg, @"\bcome\b");
            foreach (var item in matchs)
            {
                Console.WriteLine(item);
            }

            msg = Regex.Replace(msg,@"\bcome\b","****");
            Console.WriteLine(msg);


            string content = "Welcome to 'China' 'zoro' 'zore' 'zero'";

            content = Regex.Replace(content, @"'(\w+)'","[$1]");

            Console.WriteLine(content);

            string str = "我的生日是05/21/2010";

            str = Regex.Replace(str, @"(\d+)\/(\d+)\/(\d+)", "$3-$2-$1");

            Console.WriteLine(str);
            Console.WriteLine("====================");

            string str2 = "zxsssssh@itcast.cn";

            string s = Regex.Match(str2,@"(.+)@").Groups[1].Value;
            Console.WriteLine(s);
            string left = string.Empty;
            for (int i = 0; i < s.Length; i++)
            {
                left += "*";
            }

            string ss = Regex.Replace(str2, @"(.+)@", left+"@");
            Console.WriteLine(ss);

            Console.WriteLine("------------连线去重-----------");


            string str3 = "佐佐罗罗";
            str3 = Regex.Replace(str3, @"(.)\1+", "$1");
            Console.WriteLine(str3);


            Console.WriteLine("------------查找出XXYY模式的叠词-----------");


            string str4 = "浩浩荡荡、清清白白、AABB2、如火如荼、愈演愈烈、AXAY、MNYX,ABCD、没事找事、心服口服、AABBCC";
            //查找出XXYY模式的叠词
            MatchCollection matchs4 = Regex.Matches(str4, @"(.)\1(.)\2");
            foreach (Match item in matchs4)
            {
                Console.WriteLine(item);
            }
            Console.WriteLine(matchs4.Count);

            Console.WriteLine("------------查找出XAXB模式的叠词-----------");

            //查找出XAXB模式的叠词
            MatchCollection matchs5 = Regex.Matches(str4, @"(.).\1.");
            foreach (Match item in matchs5)
            {
                Console.WriteLine(item);
            }

            Console.WriteLine("------------查找出ABCB模式的叠词-----------");

            //查找出XAXB模式的叠词
            MatchCollection matchs6 = Regex.Matches(str4, @".(.).\1");
            foreach (Match item in matchs6)
            {
                Console.WriteLine(item);
            }

            Console.WriteLine("------------查找出ABABAB模式的叠词-----------");

            //查找出XAXB模式的叠词
            MatchCollection matchs7 = Regex.Matches(str4, @"(.)\1(.)\2(.)\3");
            foreach (Match item in matchs7)
            {
                Console.WriteLine(item);
            }

            Console.ReadKey();
        }
    }
}