实用字符串处理工具类-优快云博客

using System.Collections.Generic; using System.Text; using System.Security.Cryptography; using System.Text.RegularExpressions; using System.Web; using System.Web.UI; using Microsoft.VisualBasic; using System.IO; using System.Security.Permissions; using System.Collections; using System.Runtime.InteropServices; using System; using System.Data; /// <summary> /// 工具类 /// </summary> public class Utils { #region String字符串类 /// <summary> /// 返回字符串真实长度, 1个汉字长度为2 /// </summary> /// <returns></returns> public static int GetStringLength(string str) { return Encoding.Default.GetBytes(str).Length; } /// <summary> /// 过滤非法字符 /// </summary> /// <param name="str"></param> /// <returns></returns> public static string ReplaceBadChar(string str) { if (string.IsNullOrEmpty(str)) return ""; string strBadChar, tempChar; string[] arrBadChar; strBadChar = "@@,+,',--,%,^,&,?,(,),<,>,[,],{,},/,//,;,:,/",/"/","; arrBadChar = SplitString(strBadChar, ","); tempChar = str; for (int i = 0; i < arrBadChar.Length; i++) { if (arrBadChar[i].Length > 0) tempChar = tempChar.Replace(arrBadChar[i], ""); } return tempChar; } public static string InputText(string text, int maxlength) { text = text.ToLower().Trim(); if (string.IsNullOrEmpty(text)) return string.Empty; if (text.Length > maxlength) text = text.Substring(0, maxlength); text = Regex.Replace(text, "[//s]{2,{", " "); text = Regex.Replace(text, "( <[b|B][r|R]/*>)+|( <[p|P](.|//n)*?>)", "/n"); // <br> text = Regex.Replace(text, "(//s*&[n|N][b|B][s|S][p|P];//s*)+", " "); // text = Regex.Replace(text, " <(.|//n)*?>", string.Empty); //any other tags text = Regex.Replace(text, "=", ""); text = Regex.Replace(text, "%", ""); text = Regex.Replace(text, "'", ""); text = Regex.Replace(text, "select", ""); text = Regex.Replace(text, "insert", ""); text = Regex.Replace(text, "delete", ""); text = Regex.Replace(text, "or", ""); text = Regex.Replace(text, "exec", ""); text = Regex.Replace(text, "--", ""); text = Regex.Replace(text, "and", ""); text = Regex.Replace(text, "where", ""); text = Regex.Replace(text, "update", ""); text = Regex.Replace(text, "script", ""); text = Regex.Replace(text, "iframe", ""); text = Regex.Replace(text, "master", ""); text = Regex.Replace(text, "exec", ""); text = Regex.Replace(text, " <", ""); text = Regex.Replace(text, ">", ""); text = Regex.Replace(text, "/r/n", ""); return text; } /// <summary> /// 检查是否含有非法字符 /// </summary> /// <param name="str">要检查的字符串</param> /// <returns></returns> public static bool ChkBadChar(string str) { bool result = false; if (string.IsNullOrEmpty(str)) return result; string strBadChar, tempChar; string[] arrBadChar; strBadChar = "@@,+,',--,%,^,&,?,(,),<,>,[,],{,},/,//,;,:,/",/"/""; arrBadChar = SplitString(strBadChar, ","); tempChar = str; for (int i = 0; i < arrBadChar.Length; i++) { if (tempChar.IndexOf(arrBadChar[i]) >= 0) result = true; } return result; } /// <summary> /// 分割字符串 /// </summary> public static string[] SplitString(string strContent, string strSplit) { int i = strContent.IndexOf(strSplit); if (strContent.IndexOf(strSplit) < 0) { string[] tmp = { strContent }; return tmp; } //return Regex.Split(strContent, @strSplit.Replace(".", @"/."), RegexOptions.IgnoreCase); return Regex.Split(strContent, @strSplit.Replace(".", @"/.")); } /// <summary> /// 检测是否有危险的可能用于链接的字符串 /// </summary> /// <param name="str">要判断字符串</param> /// <returns>判断结果</returns> public static bool IsSafeUserInfoString(string str) { return !Regex.IsMatch(str, @"/^/s*$|^c://con//con$|[%,/*" + "/"" + @"/s/t/</>/&]|$guestexp/is"); } /// <summary> /// string型转换为int型 /// </summary> /// <param name="strValue">要转换的字符串</param> /// <returns>转换后的int类型结果.如果要转换的字符串是非数字,则返回-1.</returns> public static int StrToInt(object strValue) { int defValue = -1; if ((strValue == null) || (strValue.ToString() == string.Empty) || (strValue.ToString().Length > 10)) { return defValue; } string val = strValue.ToString(); string firstletter = val[0].ToString(); if (val.Length == 10 && IsNumber(firstletter) && int.Parse(firstletter) > 1) { return defValue; } else if (val.Length == 10 && !IsNumber(firstletter)) { return defValue; } int intValue = defValue; if (strValue != null) { bool IsInt = new Regex(@"^([-]|[0-9])[0-9]*$").IsMatch(strValue.ToString()); if (IsInt) { intValue = Convert.ToInt32(strValue); } } return intValue; } /// <summary> /// string型转换为int型 /// </summary> /// <param name="strValue">要转换的字符串</param> /// <param name="defValue">缺省值</param> /// <returns>转换后的int类型结果</returns> public static int StrToInt(object strValue, int defValue) { if ((strValue == null) || (strValue.ToString() == string.Empty) || (strValue.ToString().Length > 10)) { return defValue; } string val = strValue.ToString(); string firstletter = val[0].ToString(); if (val.Length == 10 && IsNumber(firstletter) && int.Parse(firstletter) > 1) { return defValue; } else if (val.Length == 10 && !IsNumber(firstletter)) { return defValue; } int intValue = defValue; if (strValue != null) { bool IsInt = new Regex(@"^([-]|[0-9])[0-9]*$").IsMatch(strValue.ToString()); if (IsInt) { intValue = Convert.ToInt32(strValue); } } return intValue; } /// <summary> /// string型转换为float型 /// </summary> /// <param name="strValue">要转换的字符串</param> /// <param name="defValue">缺省值</param> /// <returns>转换后的int类型结果</returns> public static float StrToFloat(object strValue, float defValue) { if ((strValue == null) || (strValue.ToString().Length > 10)) { return defValue; } float intValue = defValue; if (strValue != null) { bool IsFloat = new Regex(@"^([-]|[0-9])[0-9]*(/./w*)?$").IsMatch(strValue.ToString()); if (IsFloat) { intValue = Convert.ToSingle(strValue); } } return intValue; } /// <summary> /// string型转换为时间型 /// </summary> /// <param name="strValue">要转换的字符串</param> /// <param name="defValue">缺省值</param> /// <returns>转换后的时间类型结果</returns> public static DateTime StrToDateTime(object strValue, DateTime defValue) { if ((strValue == null) || (strValue.ToString().Length > 20)) { return defValue; } DateTime intValue; if (!DateTime.TryParse(strValue.ToString(), out intValue)) { intValue = defValue; } return intValue; } /// <summary> /// 判断给定的字符串(strNumber)是否是数值型 /// </summary> /// <param name="strNumber">要确认的字符串</param> /// <returns>是则返加true 不是则返回 false</returns> public static bool IsNumber(string strNumber) { return new Regex(@"^([0-9])[0-9]*(/./w*)?$").IsMatch(strNumber); } /// <summary> /// 检测是否符合email格式 /// </summary> /// <param name="strEmail">要判断的email字符串</param> /// <returns>判断结果</returns> public static bool IsValidEmail(string strEmail) { return Regex.IsMatch(strEmail, @"^([/w-/.]+)@((/[[0-9]{1,3}/.[0-9]{1,3}/.[0-9]{1,3}/.)|(([/w-]+/.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(/]?)$"); } /// <summary> /// 检测是否符合url格式,前面必需含有http:// /// </summary> /// <param name="url"></param> /// <returns></returns> public static bool IsURL(string url) { return Regex.IsMatch(url, @"^http(s)?://([/w-]+/.)+[/w-]+(/[/w- ./?%&=]*)?$"); } /// <summary> /// 检测是否符合电话格式 /// </summary> /// <param name="phoneNumber"></param> /// <returns></returns> public static bool IsPhoneNumber(string phoneNumber) { return Regex.IsMatch(phoneNumber, @"^(/(/d{3}/)|/d{3}-)?/d{7,8}$"); } /// <summary> /// 检测是否符合时间格式 /// </summary> /// <returns></returns> public static bool IsTime(string timeval) { return Regex.IsMatch(timeval, @"20/d{2}/-[0-1]{1,2}/-[0-3]?[0-9]?(/s*((([0-1]?[0-9])|(2[0-3])):([0-5]?[0-9])(:[0-5]?[0-9])?))?"); } /// <summary> /// 检测是否符合身份证号码格式 /// </summary> /// <param name="num"></param> /// <returns></returns> public static bool IsIdentityNumber(string num) { return Regex.IsMatch(num, @"^/d{17}[/d|X]|/d{15}$"); } /// <summary> /// 检测是否符合邮编格式 /// </summary> /// <param name="postCode"></param> /// <returns></returns> public static bool IsPostCode(string postCode) { return Regex.IsMatch(postCode, @"^/d{6}$"); } /// <summary> /// MD5函数 /// </summary> /// <param name="str">原始字符串</param> /// <returns>MD5结果</returns> public static string MD5(string str) { byte[] b = Encoding.Default.GetBytes(str); b = new MD5CryptoServiceProvider().ComputeHash(b); string ret = ""; for (int i = 0; i < b.Length; i++) ret += b[i].ToString("x").PadLeft(2, '0'); return ret; } ///// <summary> ///// 转换为简体中文 ///// </summary> //public static string ToSChinese(string str) //{ // return Strings.StrConv(str, VbStrConv.SimplifiedChinese, 0); //} ///// <summary> ///// 转换为繁体中文 ///// </summary> //public static string ToTChinese(string str) //{ // return Strings.StrConv(str, VbStrConv.TraditionalChinese, 0); //} /// <summary> /// 自定义的替换字符串函数 /// </summary> public static string ReplaceString(string SourceString, string SearchString, string ReplaceString, bool IsCaseInsensetive) { return Regex.Replace(SourceString, Regex.Escape(SearchString), ReplaceString, IsCaseInsensetive ? RegexOptions.IgnoreCase : RegexOptions.None); } /// <summary> /// 检查一个数组中所有的元素是否有包含于指定字符串的元素 /// </summary> /// <param name="arr">存储数据数据的字串</param> /// <param name="toFind">要查找的字符串</param> /// <param name="separator">数组的分隔符</param> /// <returns></returns> public static bool FoundStringInArr(string arr, string toFind, char separator) { if (arr.IndexOf(separator) >= 0) { string[] arrTemp = arr.Split('|'); for (int i = 0; i < arrTemp.Length; i++) { if ((toFind.ToLower().IndexOf(arrTemp[i].ToLower()) >= 0) && (arrTemp[i].ToLower() != "")) return true; } } else { if ((toFind.ToLower().IndexOf(arr.ToLower())) >= 0 && (arr.ToLower() != "")) return true; } return false; } #endregion #region Sql类 /// <summary> /// 检测是否有Sql危险字符 /// </summary> /// <param name="str">要判断字符串</param> /// <returns>判断结果</returns> public static bool IsSafeSqlString(string str) { return !Regex.IsMatch(str, @"[-|;|,|//|/(|/)|/[|/]|/}|/{|%|@|/*|!|/']"); } /// <summary> /// 改正sql语句中的转义字符 /// </summary> public static string mashSQL(string str) { string str2; if (str == null) { str2 = ""; } else { str = str.Replace("/'", "'"); str2 = str; } return str2; } /// <summary> /// 替换sql语句中的有问题符号 /// </summary> public static string ReplaceBadSQL(string str) { string str2; if (str == null) { str2 = ""; } else { str = str.Replace("'", "''"); str2 = str; } return str2; } #endregion #region Html类 /// <summary> /// 返回 HTML 字符串的编码结果 /// </summary> /// <param name="str">字符串</param> /// <returns>编码结果</returns> public static string HtmlEncode(string str) { // str = str.Replace("'", "''"); return HttpUtility.HtmlEncode(str); } /// <summary> /// 返回 HTML 字符串的解码结果 /// </summary> /// <param name="str">字符串</param> /// <returns>解码结果</returns> public static string HtmlDecode(string str) { //str = str.Replace("''", "'"); return HttpUtility.HtmlDecode(str); } /// <summary> /// 替换html字符 /// </summary> public static string EncodeHtml(string strHtml) { if (strHtml != "") { strHtml = strHtml.Replace(",", "&def"); strHtml = strHtml.Replace("'", "&dot"); strHtml = strHtml.Replace(";", "&dec"); return strHtml; } return ""; } /// <summary> /// 替换回车换行符为html换行符 /// </summary> public static string StrFormat(string str) { string str2; if (str == null) { str2 = ""; } else { str = str.Replace("/r/n", "<br />"); str = str.Replace("/n", "<br />"); str2 = str; } return str2; } #endregion #region DateTime类 /// <summary> /// 返回标准日期格式string /// </summary> public static string GetDate() { return DateTime.Now.ToString("yyyy-MM-dd"); } /// <summary> /// 返回指定日期格式 /// </summary> public static string GetDate(string datetimestr, string replacestr) { if (datetimestr == null) { return replacestr; } if (datetimestr.Equals("")) { return replacestr; } try { datetimestr = Convert.ToDateTime(datetimestr).ToString("yyyy-MM-dd").Replace("1900-01-01", replacestr); } catch { return replacestr; } return datetimestr; } /// <summary> /// 返回标准时间格式string /// </summary> public static string GetTime() { return DateTime.Now.ToString("HH:mm:ss"); } /// <summary> /// 返回标准时间格式string /// </summary> public static string GetDateTime() { return DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"); } /// <summary> /// 返回相对于当前时间的相对天数 /// </summary> public static string GetDateTime(int relativeday) { return DateTime.Now.AddDays(relativeday).ToString("yyyy-MM-dd HH:mm:ss"); } /// <summary> /// 返回标准时间格式string /// </summary> public static string GetDateTimeF() { return DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss:fffffff"); } /// <summary> /// 返回标准时间 /// </sumary> public static string GetStandardDateTime(string fDateTime, string formatStr) { DateTime s = Convert.ToDateTime(fDateTime); return s.ToString(formatStr); } /// <summary> /// 返回标准时间 yyyy-MM-dd HH:mm:ss /// </sumary> public static string GetStandardDateTime(string fDateTime) { return GetStandardDateTime(fDateTime, "yyyy-MM-dd HH:mm:ss"); } /// <summary> /// 返回相差的秒数 /// </summary> /// <param name="Time"></param> /// <param name="Sec"></param> /// <returns></returns> public static int StrDateDiffSeconds(string Time, int Sec) { TimeSpan ts = DateTime.Now - DateTime.Parse(Time).AddSeconds(Sec); if (ts.TotalSeconds > int.MaxValue) { return int.MaxValue; } else if (ts.TotalSeconds < int.MinValue) { return int.MinValue; } return (int)ts.TotalSeconds; } /// <summary> /// 返回相差的分钟数 /// </summary> /// <param name="time"></param> /// <param name="minutes"></param> /// <returns></returns> public static int StrDateDiffMinutes(string time, int minutes) { if (time == "" || time == null) return 1; TimeSpan ts = DateTime.Now - DateTime.Parse(time).AddMinutes(minutes); if (ts.TotalMinutes > int.MaxValue) { return int.MaxValue; } else if (ts.TotalMinutes < int.MinValue) { return int.MinValue; } return (int)ts.TotalMinutes; } /// <summary> /// 返回相差的小时数 /// </summary> /// <param name="time"></param> /// <param name="hours"></param> /// <returns></returns> public static int StrDateDiffHours(string time, int hours) { if (time == "" || time == null) return 1; TimeSpan ts = DateTime.Now - DateTime.Parse(time).AddHours(hours); if (ts.TotalHours > int.MaxValue) { return int.MaxValue; } else if (ts.TotalHours < int.MinValue) { return int.MinValue; } return (int)ts.TotalHours; } #endregion #region file类 /// <summary> /// 得到网站的真实路径 /// </summary> /// <returns></returns> public static string GetTrueWebSitePath() { string path = HttpContext.Current.Request.Path; if (path.LastIndexOf("/") != path.IndexOf("/")) { path = path.Substring(path.IndexOf("/"), path.LastIndexOf("/") + 1); } else { path = "/"; } return path; } /// <summary> /// 文件是否存在 /// </summary> /// <param name="filePath">相对路径</param> /// <returns></returns> public static bool FileExists(string filePath) { if (string.IsNullOrEmpty(filePath)) return false; filePath = HttpContext.Current.Server.MapPath(filePath); DirectoryInfo dirInfo = new DirectoryInfo(filePath); if (dirInfo.Exists) return true; return false; } /// <summary> /// 创建目录 /// </summary> /// <param name="filePath">相对路径</param> /// <returns>是否成功</returns> public static bool CreateDirectory(string filePath) { if (string.IsNullOrEmpty(filePath)) return false; filePath = HttpContext.Current.Server.MapPath(filePath); DirectoryInfo dirInfo = new DirectoryInfo(filePath); if (dirInfo.Exists) return true; try { Directory.CreateDirectory(filePath); return true; } catch { return false; } } #endregion #region Number类 /// <summary> /// 将long型数值转换为Int32类型 /// </summary> /// <param name="objNum"></param> /// <returns></returns> public static int SafeInt32(object objNum) { if (objNum == null) { return 0; } string strNum = objNum.ToString(); if (IsNumber(strNum)) { if (strNum.ToString().Length > 9) { return int.MaxValue; } return Int32.Parse(strNum); } else { return 0; } } /**/ /// <summary> /// 写cookie值 /// </summary> /// <param name="strName">名称</param> /// <param name="strValue">值</param> /// <param name="strValue">过期时间(分钟)</param> public static void WriteCookie(string strName, string strValue, int expires) { HttpCookie cookie = HttpContext.Current.Request.Cookies[strName]; if (cookie == null) { cookie = new HttpCookie(strName); } cookie.Value = strValue; cookie.Expires = DateTime.Now.AddMinutes(expires); HttpContext.Current.Response.AppendCookie(cookie); } /**/ /// <summary> /// 读cookie值 /// </summary> /// <param name="strName">名称</param> /// <returns>cookie值</returns> public static string GetCookie(string strName) { if (HttpContext.Current.Request.Cookies != null && HttpContext.Current.Request.Cookies[strName] != null) { return HttpContext.Current.Request.Cookies[strName].Value.ToString(); } return ""; } #endregion public static string Check(string html) { System.Text.RegularExpressions.Regex regex1 = new System.Text.RegularExpressions.Regex(@"<mce:script[/s/S]+</script *></mce:script>标记 html = regex2.Replace(html, ""); //过滤href=javascript: (<A>) 属性 html = regex3.Replace(html, " _disibledevent="); //过滤其它控件的on...事件 html = regex4.Replace(html, ""); //过滤iframe html = regex5.Replace(html, ""); //过滤frameset html = regex6.Replace(html, ""); //过滤frameset html = regex7.Replace(html, ""); //过滤frameset html = regex8.Replace(html, ""); //过滤frameset html = regex9.Replace(html, ""); html = html.Replace(" ", ""); html = html.Replace("</strong>", ""); html = html.Replace("<strong>", ""); return html; } /// <summary> /// 从字符串的指定位置截取指定长度的子字符串 /// </summary> /// <param name="str">原字符串</param> /// <param name="startIndex">子字符串的起始位置</param> /// <param name="length">子字符串的长度</param> /// <returns>子字符串</returns> public static string CutString(string str, int startIndex, int length) { if (startIndex >= 0) { if (length < 0) { length = length * -1; if (startIndex - length < 0) { length = startIndex; startIndex = 0; } else { startIndex = startIndex - length; } } if (startIndex > str.Length) { return ""; } } else { if (length < 0) { return ""; } else { if (length + startIndex > 0) { length = length + startIndex; startIndex = 0; } else { return ""; } } } if (str.Length - startIndex < length) { length = str.Length - startIndex; } return str.Substring(startIndex, length); } #region 截取字符串 /// <summary> /// 截取字符串 /// </summary> /// <param name="content"></param> /// <returns></returns> public static string CutString(object content, int num) { if (content != null) { if (content.ToString() != "") return content.ToString().Length > num ? content.ToString().Substring(0, num) : content.ToString(); else return ""; } else return ""; } #endregion }