c#常用正则表达式

public class RegexUtil
{private RegexUtil() { }private static RegexUtil instance = null;/// <summary>/// 静态实例化单体模式/// 保证应用程序操作某一全局对象，让其保持一致而产生的对象/// </summary>/// <returns></returns>public static RegexUtil GetInstance(){if (RegexUtil.instance == null){RegexUtil.instance = new RegexUtil();}return RegexUtil.instance;}/// <summary>/// 判断输入的字符串只包含汉字/// </summary>/// <param name="input"></param>/// <returns></returns>public static bool IsChineseCh(string input){return IsMatch(@"^[\u4e00-\u9fa5]+$", input);}/// <summary>/// 匹配3位或4位区号的电话号码，其中区号可以用小括号括起来，/// 也可以不用，区号与本地号间可以用连字号或空格间隔，/// 也可以没有间隔/// \(0\d{2}\)[- ]?\d{8}|0\d{2}[- ]?\d{8}|\(0\d{3}\)[- ]?\d{7}|0\d{3}[- ]?\d{7}/// </summary>/// <param name="input"></param>/// <returns></returns>public static bool IsPhone(string input){string pattern = "^\\(0\\d{2}\\)[- ]?\\d{8}$|^0\\d{2}[- ]?\\d{8}$|^\\(0\\d{3}\\)[- ]?\\d{7}$|^0\\d{3}[- ]?\\d{7}$";return IsMatch(pattern, input);            }/// <summary>/// 判断输入的字符串是否是一个合法的手机号/// </summary>/// <param name="input"></param>/// <returns></returns>public static bool IsMobilePhone(string input){return IsMatch(@"^13\\d{9}$", input);}/// <summary>/// 判断输入的字符串只包含数字/// 可以匹配整数和浮点数/// ^-?\d+$|^(-?\d+)(\.\d+)?$/// </summary>/// <param name="input"></param>/// <returns></returns>public static bool IsNumber(string input){string pattern = "^-?\\d+$|^(-?\\d+)(\\.\\d+)?$";return IsMatch(pattern, input);            }/// <summary>/// 匹配非负整数/// </summary>/// <param name="input"></param>/// <returns></returns>public static bool IsNotNagtive(string input){return IsMatch(@"^\d+$", input);}/// <summary>/// 匹配正整数/// </summary>/// <param name="input"></param>/// <returns></returns>public static bool IsUint(string input){return IsMatch(@"^[0-9]*[1-9][0-9]*$", input);            }/// <summary>/// 判断输入的字符串字包含英文字母/// </summary>/// <param name="input"></param>/// <returns></returns>public static bool IsEnglisCh(string input){return IsMatch(@"^[A-Za-z]+$", input);            }/// <summary>/// 判断输入的字符串是否是一个合法的Email地址/// </summary>/// <param name="input"></param>/// <returns></returns>public static bool IsEmail(string input){string pattern = @"^([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$";return IsMatch(pattern, input);            }/// <summary>/// 判断输入的字符串是否只包含数字和英文字母/// </summary>/// <param name="input"></param>/// <returns></returns>public static bool IsNumAndEnCh(string input){return IsMatch(@"^[A-Za-z0-9]+$", input);}/// <summary>/// 判断输入的字符串是否是一个超链接/// </summary>/// <param name="input"></param>/// <returns></returns>public static bool IsURL(string input){string pattern = @"^[a-zA-Z]+://(\w+(-\w+)*)(\.(\w+(-\w+)*))*(\?\S*)?$";return IsMatch(pattern, input);            }/// <summary>/// 判断输入的字符串是否是表示一个IP地址/// </summary>/// <param name="input">被比较的字符串</param>/// <returns>是IP地址则为True</returns>public static bool IsIPv4(string input){string[] IPs = input.Split('.');for (int i = 0; i < IPs.Length; i++){if (!IsMatch(@"^\d+$",IPs[i])){return false;}if (Convert.ToUInt16(IPs[i]) > 255){return false;}}return true;}/// <summary>/// 判断输入的字符串是否是合法的IPV6 地址/// </summary>/// <param name="input"></param>/// <returns></returns>public static bool IsIPV6(string input){string pattern = "";string temp = input;string[] strs = temp.Split(':');if (strs.Length > 8){return false;}int count = RegexUtil.GetStringCount(input, "::");if (count > 1){return false;}else if (count == 0){pattern = @"^([\da-f]{1,4}:){7}[\da-f]{1,4}$";return IsMatch(pattern, input);}else{pattern = @"^([\da-f]{1,4}:){0,5}::([\da-f]{1,4}:){0,5}[\da-f]{1,4}$";return IsMatch(pattern, input);}}#region 正则的通用方法/// <summary>/// 计算字符串的字符长度，一个汉字字符将被计算为两个字符/// </summary>/// <param name="input">需要计算的字符串</param>/// <returns>返回字符串的长度</returns>public static int GetCount(string input){return Regex.Replace(input, @"[\u4e00-\u9fa5/g]", "aa").Length;}/// <summary>/// 调用Regex中IsMatch函数实现一般的正则表达式匹配/// </summary>/// <param name="pattern">要匹配的正则表达式模式。</param>/// <param name="input">要搜索匹配项的字符串</param>/// <returns>如果正则表达式找到匹配项，则为 true；否则，为 false。</returns>public static bool IsMatch(string pattern, string input){if (input == null || input == "") return false;Regex regex = new Regex(pattern);return regex.IsMatch(input);}/// <summary>/// 从输入字符串中的第一个字符开始，用替换字符串替换指定的正则表达式模式的所有匹配项。/// </summary>/// <param name="pattern">模式字符串</param>/// <param name="input">输入字符串</param>/// <param name="replacement">用于替换的字符串</param>/// <returns>返回被替换后的结果</returns>public static string Replace(string pattern, string input, string replacement){Regex regex = new Regex(pattern);return regex.Replace(input, replacement);}/// <summary>/// 在由正则表达式模式定义的位置拆分输入字符串。/// </summary>/// <param name="pattern">模式字符串</param>/// <param name="input">输入字符串</param>/// <returns></returns>public static string[] Split(string pattern, string input){Regex regex = new Regex(pattern);return regex.Split(input);}/* ******************************************************************** 1、通过“:”来分割字符串看得到的字符串数组长度是否小于等于8* 2、判断输入的IPV6字符串中是否有“::”。* 3、如果没有“::”采用 ^([\da-f]{1,4}:){7}[\da-f]{1,4}$ 来判断* 4、如果有“::” ，判断"::"是否止出现一次* 5、如果出现一次以上 返回false* 6、^([\da-f]{1,4}:){0,5}::([\da-f]{1,4}:){0,5}[\da-f]{1,4}$* ******************************************************************//// <summary>/// 判断字符串compare 在 input字符串中出现的次数/// </summary>/// <param name="input">源字符串</param>/// <param name="compare">用于比较的字符串</param>/// <returns>字符串compare 在 input字符串中出现的次数</returns>private static int GetStringCount(string input, string compare){int index = input.IndexOf(compare);if (index != -1){return 1 + GetStringCount(input.Substring(index + compare.Length), compare);}else{return 0;}}/// <summary>/// 根据结构体RegularFormula,返回具体正则表达式/// </summary>/// <param name="RegulatFormula"></param>/// <returns></returns>private static string GetRegularFormula(string RegulatFormula){string str = "";if (RegulatFormula.ToUpper().IndexOf("RegularFormula".ToUpper()) > -1){RegularFormula formula = new RegularFormula();Type type = typeof(RegularFormula);foreach (System.Reflection.FieldInfo info in type.GetFields()){if (("RegularFormula." + info.Name).ToUpper() == RegulatFormula.ToUpper()){str = info.GetValue(formula).ToString();}}return str;}return RegulatFormula;}#endregion
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