cyf
639 lines
23 KiB
C#
639 lines
23 KiB
C#
using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.Text.RegularExpressions;
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using System.Threading;
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using System.Web.Configuration;
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using System.Web.Security;
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using System.Text;
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namespace Zhaizj.Framework {
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/// <summary>
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/// 字符串工具类，封装了常见字符串操作
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/// </summary>
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public class strUtil {
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private static Regex htmlReg = new Regex( "<[^>]*>" );
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/// <summary>
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/// 检查字符串是否是 null 或者空白字符。不同于.net自带的string.IsNullOrEmpty，多个空格在这里也返回true。
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/// </summary>
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/// <param name="target"></param>
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/// <returns></returns>
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public static Boolean IsNullOrEmpty( String target ) {
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if (target != null) {
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return target.Trim().Length == 0;
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}
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return true;
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}
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/// <summary>
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/// 检查是否包含有效字符(空格等空白字符不算)
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/// </summary>
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/// <param name="target"></param>
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/// <returns></returns>
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public static Boolean HasText( String target ) {
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return !IsNullOrEmpty( target );
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}
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/// <summary>
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/// 比较两个字符串是否相等
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/// </summary>
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/// <param name="s1"></param>
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/// <param name="s2"></param>
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/// <returns></returns>
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public static Boolean Equals( String s1, String s2 ) {
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if (s1 == null && s2 == null) return true;
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if (s1 == null || s2 == null) return false;
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if (s2.Length != s1.Length) return false;
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return string.Compare( s1, 0, s2, 0, s2.Length ) == 0;
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}
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/// <summary>
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/// 比较两个字符串是否相等(不区分大小写)
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/// </summary>
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/// <param name="s1"></param>
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/// <param name="s2"></param>
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/// <returns></returns>
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public static Boolean EqualsIgnoreCase( String s1, String s2 ) {
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if (s1 == null && s2 == null) return true;
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if (s1 == null || s2 == null) return false;
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if (s2.Length != s1.Length) return false;
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return string.Compare( s1, 0, s2, 0, s2.Length, StringComparison.OrdinalIgnoreCase ) == 0;
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}
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/// <summary>
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/// 将 endString 附加到 srcString末尾，如果 srcString 末尾已包含 endString，则不再附加。
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/// </summary>
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/// <param name="srcString"></param>
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/// <param name="endString"></param>
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/// <returns></returns>
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public static String Append( String srcString, String endString ) {
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if (strUtil.IsNullOrEmpty( srcString )) return endString;
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if (strUtil.IsNullOrEmpty( endString )) return srcString;
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if (srcString.EndsWith( endString )) return srcString;
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return srcString + endString;
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}
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/// <summary>
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/// 将对象转为字符串，如果对象为 null，则转为空字符串(string.Empty)
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/// </summary>
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/// <param name="str"></param>
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/// <returns></returns>
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public static String ConverToNotNull( Object str ) {
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if (str == null) return "";
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return str.ToString();
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}
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/// <summary>
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/// 从字符串中截取指定长度的一段，如果源字符串被截取了，则结果末尾出现省略号...
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/// </summary>
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/// <param name="str">源字符串</param>
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/// <param name="length">需要截取的长度</param>
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/// <returns></returns>
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public static String CutString( Object str, int length ) {
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return CutString( ConverToNotNull( str ), length );
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}
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/// <summary>
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/// 从字符串中截取指定长度的一段，如果源字符串被截取了，则结果末尾出现省略号...
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/// </summary>
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/// <param name="str">源字符串</param>
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/// <param name="length">需要截取的长度</param>
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/// <returns></returns>
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public static String CutString( String str, int length ) {
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if (str == null) return null;
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if (str.Length > length) return String.Format( "{0}...", str.Substring( 0, length ) );
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return str;
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}
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/// <summary>
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/// 将字符串转换为编辑器中可用的字符串(替换掉换行符号)
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/// </summary>
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/// <param name="str"></param>
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/// <returns></returns>
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public static String Edit( String str ) {
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return str.Replace( "\n", "" ).Replace( "\r", "" ).Replace( "'", "'" );
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}
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/// <summary>
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/// 对双引号进行编码
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/// </summary>
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/// <param name="src"></param>
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/// <returns></returns>
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public static String EncodeQuote( String src ) {
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return src.Replace( "\"", """ );
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}
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/// <summary>
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/// 让 html 在 textarea 中正常显示。替换尖括号和字符&lt;与&gt;
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/// </summary>
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/// <param name="html"></param>
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/// <returns></returns>
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public static String EncodeTextarea( String html ) {
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if (html == null) return null;
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return html.Replace( "<", "&lt;" ).Replace( ">", "&gt;" ).Replace( "<", "<" ).Replace( ">", ">" );
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}
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///// <summary>
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///// 对双引号进行编码，并替换掉换行符
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///// </summary>
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///// <param name="src"></param>
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///// <returns></returns>
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//public static String EncodeQuoteAndClearLine( String src ) {
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// return src.Replace( "\"", "\\\"" ).Replace( "\r\n", "" ).Replace( "\n", "" ).Replace( "\r", "" ).Replace( "\r\n", "" );
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//}
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/// <summary>
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/// 截取字符串末尾的整数
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/// </summary>
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/// <param name="rawString"></param>
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/// <returns></returns>
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public static int GetEndNumber( String rawString ) {
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if (IsNullOrEmpty( rawString )) return 0;
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char[] chArray = rawString.ToCharArray();
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int startIndex = -1;
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for (int i = chArray.Length - 1; i >= 0; i--) {
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if (!char.IsDigit( chArray[i] )) break;
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startIndex = i;
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}
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if (startIndex == -1) return 0;
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return cvt.ToInt( rawString.Substring( startIndex ) );
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}
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/// <summary>
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/// 获取 html 文档的标题内容
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/// </summary>
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/// <param name="html"></param>
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/// <returns></returns>
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public String getHtmlTitle( String html ) {
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Match match = Regex.Match( html, "<title>(.*)</title>" );
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if (match.Groups.Count == 2) return match.Groups[1].Value;
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return "(unknown)";
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}
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/// <summary>
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/// 将整数按照指定的长度转换为字符串，比如33转换为6位就是"000033"
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/// </summary>
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/// <param name="intValue"></param>
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/// <param name="length"></param>
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/// <returns></returns>
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public static String GetIntString( int intValue, int length ) {
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return String.Format( "{0:D" + length + "}", intValue );
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}
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/// <summary>
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/// 得到字符串的 TitleCase 格式
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/// </summary>
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/// <param name="str"></param>
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/// <returns></returns>
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public static String GetTitleCase( String str ) {
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return Thread.CurrentThread.CurrentCulture.TextInfo.ToTitleCase( str );
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}
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/// <summary>
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/// 得到字符串的 CamelCase 格式
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/// </summary>
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/// <param name="str"></param>
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/// <returns></returns>
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public static String GetCamelCase( String str ) {
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if (IsNullOrEmpty( str )) return str;
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return str[0].ToString().ToLower() + str.Substring( 1 );
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}
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/// <summary>
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/// 根据对象(IEntity)列表，获取所有对象的ids字符串
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/// </summary>
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/// <param name="objList">对象必须是IEntity接口</param>
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/// <returns>比如 2,5,8 等</returns>
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public static string GetIds( IList objList ) {
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if (objList == null || objList.Count == 0) return "";
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String ids = "";
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foreach (IEntity obj in objList) {
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if (obj == null || obj.Id == 0) continue;
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ids += obj.Id + ",";
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}
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return ids.TrimEnd( ',' );
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}
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/// <summary>
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/// 从类型的全名中获取类型名称(不包括命名空间)
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/// </summary>
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/// <param name="typeFullName"></param>
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/// <returns></returns>
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public static String GetTypeName( String typeFullName ) {
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String[] strArray = typeFullName.Split( new char[] { '.' } );
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return strArray[strArray.Length - 1];
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}
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/// <summary>
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/// 获取类型名称(主要针对泛型做特殊处理)。如果要获取内部元素信息，请使用t.GetGenericArguments
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/// </summary>
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/// <param name="t"></param>
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/// <returns></returns>
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public static String GetTypeName( Type t ) {
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if (t.IsGenericType == false) return t.Name;
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return t.Name.Split( '`' )[0];
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}
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/// <summary>
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/// 获取类型全名(主要针对泛型做特殊处理)，比如List<String>返回System.Collections.Generic.List。如果要获取内部元素信息，请使用t.GetGenericArguments
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/// </summary>
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/// <param name="t"></param>
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/// <returns></returns>
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public static String GetTypeFullName( Type t ) {
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if (t.IsGenericType == false) return t.FullName;
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return t.FullName.Split( '`' )[0];
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}
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/// <summary>
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/// 返回泛型的类型全名，包括元素名，比如System.Collections.Generic.List<System.String>
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/// </summary>
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/// <param name="t"></param>
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/// <returns></returns>
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public static String GetGenericTypeWithArgs( Type t ) {
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//System.Collections.Generic.Dictionary`2[System.Int32,System.String]
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String[] arr = t.ToString().Split( '`' );
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String[] arrArgs = arr[1].Split( '[' );
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String args = "<" + arrArgs[1].TrimEnd( ']' ) + ">";
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return arr[0] + args;
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}
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/// <summary>
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/// 是否是英文字符和下划线
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/// </summary>
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/// <param name="rawString"></param>
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/// <returns></returns>
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public static Boolean IsLetter( String rawString ) {
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if (IsNullOrEmpty( rawString )) return false;
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char[] arrChar = rawString.ToCharArray();
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foreach (char c in arrChar) {
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if ("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_".IndexOf( c ) < 0)
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return false;
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}
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return true;
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}
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/// <summary>
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/// 是否是英文、数字和下划线，但不能以下划线开头
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/// </summary>
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/// <param name="rawString"></param>
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/// <returns></returns>
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public static Boolean IsUrlItem( String rawString ) {
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if (IsNullOrEmpty( rawString )) return false;
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char[] arrChar = rawString.ToCharArray();
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if (arrChar[0] == '_') return false;
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foreach (char c in arrChar) {
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if ("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_1234567890".IndexOf( c ) < 0)
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return false;
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}
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return true;
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}
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/// <summary>
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/// 是否全部都是中文字符
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/// </summary>
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/// <param name="str"></param>
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/// <returns></returns>
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public static Boolean IsChineseLetter( String str ) {
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if (strUtil.IsNullOrEmpty( str )) return false;
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char[] arr = str.ToCharArray();
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for (int i = 0; i < arr.Length; i++) {
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if (IsChineseLetter( str, i ) == false) return false;
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}
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return true;
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}
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/// <summary>
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/// 只能以英文或中文开头，允许英文、数字、下划线和中文；
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/// </summary>
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/// <param name="str"></param>
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/// <returns></returns>
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public static Boolean IsAbcNumberAndChineseLetter( String str ) {
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if (strUtil.IsNullOrEmpty( str )) return false;
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char[] arr = str.ToCharArray();
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if (isAbcAndChinese( arr[0] ) == false) return false;
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for (int i = 0; i < arr.Length; i++) {
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if ("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_1234567890".IndexOf( arr[i] ) >= 0) continue;
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if (IsChineseLetter( str, i ) == false) return false;
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}
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return true;
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}
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private static Boolean isAbcAndChinese( char c ) {
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if ("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ".IndexOf( c ) >= 0) return true;
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if (IsChineseLetter( c.ToString(), 0 ) == true) return true;
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return false;
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}
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private static Boolean IsChineseLetter( String input, int index ) {
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int chineseCharBegin = Convert.ToInt32( 0x4e00 );
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int chineseCharEnd = Convert.ToInt32( 0x9fff );
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int code = Char.ConvertToUtf32( input, index );
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return (code >= chineseCharBegin && code <= chineseCharEnd);
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}
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/// <summary>
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/// 是否是有效的颜色值(3位或6位，全部由英文字符或数字组成)
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/// </summary>
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/// <param name="aColor"></param>
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/// <returns></returns>
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public static Boolean IsColorValue( String aColor ) {
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if (strUtil.IsNullOrEmpty( aColor )) return false;
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String color = aColor.Trim().TrimStart( '#' ).Trim();
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if (color.Length != 3 && color.Length != 6) return false;
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char[] arr = color.ToCharArray();
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foreach (char c in arr) {
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if ("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890".IndexOf( c ) < 0) return false;
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}
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return true;
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}
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/// <summary>
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/// 用斜杠/拼接两个字符串
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/// </summary>
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/// <param name="strA"></param>
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/// <param name="strB"></param>
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/// <returns></returns>
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public static String Join( String strA, String strB ) {
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return Join( strA, strB, "/" );
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}
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/// <summary>
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/// 根据制定的分隔符拼接两个字符串
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/// </summary>
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/// <param name="strA"></param>
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/// <param name="strB"></param>
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/// <param name="separator"></param>
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/// <returns></returns>
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public static String Join( String strA, String strB, String separator ) {
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return (Append( strA, separator ) + TrimStart( strB, separator ));
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}
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/// <summary>
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/// 剔除 html 中的 tag
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/// </summary>
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/// <param name="html"></param>
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/// <returns></returns>
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public static String ParseHtml( Object html ) {
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if (html == null) return String.Empty;
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return htmlReg.Replace( html.ToString(), "" ).Replace( " ", " " );
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}
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/// <summary>
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/// 剔除 html 中的 tag，并返回指定长度的字符串
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/// </summary>
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/// <param name="html"></param>
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/// <param name="count"></param>
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/// <returns></returns>
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public static String ParseHtml( Object html, int count ) {
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return CutString( ParseHtml( html ), count ).Replace( " ", "" );
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}
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/// <summary>
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/// 从 html 中截取指定长度的一段，并关闭未结束的 html 标签
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/// </summary>
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/// <param name="html"></param>
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/// <param name="count">需要截取的长度(小于20个字符按20个字符计算)</param>
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/// <returns></returns>
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public static String CutHtmlAndColse( String html, int count ) {
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if (html == null) return "";
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html = html.Trim();
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if (count <= 0) return "";
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if (count < 20) count = 20;
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String unclosedHtml = html.Length <= count ? html : html.Trim().Substring( 0, count );
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return CloseHtml( unclosedHtml );
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}
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/// <summary>
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/// 关闭未结束的 html 标签
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/// (TODO 本方法临时使用，待重写)
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/// </summary>
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/// <param name="unClosedHtml"></param>
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/// <returns></returns>
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public static String CloseHtml( String unClosedHtml ) {
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if (unClosedHtml == null) return "";
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String[] arrTags = new String[] { "strong", "b", "i", "u", "em", "font", "span", "label", "pre", "td", "th", "tr", "tbody", "table", "li", "ul", "ol", "h1", "h2", "h3", "h4", "h5", "h6", "p", "div" };
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for (int i = 0; i < arrTags.Length; i++) {
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Regex re = new Regex( "<" + arrTags[i] + "[^>]*>", RegexOptions.IgnoreCase );
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int openCount = re.Matches( unClosedHtml ).Count;
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if (openCount == 0) continue;
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re = new Regex( "</" + arrTags[i] + ">", RegexOptions.IgnoreCase );
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int closeCount = re.Matches( unClosedHtml ).Count;
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int unClosedCount = openCount - closeCount;
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for (int k = 0; k < unClosedCount; k++) {
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unClosedHtml += "</" + arrTags[i] + ">";
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}
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}
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return unClosedHtml;
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}
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/// <summary>
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/// 将字符串分割成数组
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/// </summary>
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/// <param name="srcString"></param>
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/// <param name="separator"></param>
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/// <returns></returns>
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public static String[] Split( String srcString, String separator ) {
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if (srcString == null) return null;
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if (separator == null) throw new ArgumentNullException();
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return srcString.Split( new String[] { separator }, StringSplitOptions.None );
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}
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|
||
/// <summary>
|
||
/// 过滤掉 sql 语句中的单引号，并返回指定长度的结果
|
||
/// </summary>
|
||
/// <param name="rawSql"></param>
|
||
/// <param name="number"></param>
|
||
/// <returns></returns>
|
||
public static String SqlClean( String rawSql, int number ) {
|
||
if (IsNullOrEmpty( rawSql )) return rawSql;
|
||
return SubString( rawSql, number ).Replace( "'", "''" );
|
||
}
|
||
|
||
/// <summary>
|
||
/// 从字符串中截取指定长度的一段，结果末尾没有省略号
|
||
/// </summary>
|
||
/// <param name="str"></param>
|
||
/// <param name="length"></param>
|
||
/// <returns></returns>
|
||
public static String SubString( String str, int length ) {
|
||
if (str == null) return null;
|
||
if (str.Length > length) return str.Substring( 0, length );
|
||
return str;
|
||
}
|
||
|
||
/// <summary>
|
||
/// 将纯文本中的换行符转换成html中换行符
|
||
/// </summary>
|
||
/// <param name="str"></param>
|
||
/// <returns></returns>
|
||
public static String Text2Html( String str ) {
|
||
return str.Replace( "\n", "<br/>" );
|
||
}
|
||
|
||
/// <summary>
|
||
/// 从 srcString 的末尾剔除掉 trimString
|
||
/// </summary>
|
||
/// <param name="srcString"></param>
|
||
/// <param name="trimString"></param>
|
||
/// <returns></returns>
|
||
public static String TrimEnd( String srcString, String trimString ) {
|
||
if (strUtil.IsNullOrEmpty( trimString )) return srcString;
|
||
if (srcString.EndsWith( trimString ) == false) return srcString;
|
||
if (srcString.Equals( trimString )) return "";
|
||
return srcString.Substring( 0, srcString.Length - trimString.Length );
|
||
}
|
||
|
||
/// <summary>
|
||
/// 从 srcString 的开头剔除掉 trimString
|
||
/// </summary>
|
||
/// <param name="srcString"></param>
|
||
/// <param name="trimString"></param>
|
||
/// <returns></returns>
|
||
public static String TrimStart( String srcString, String trimString ) {
|
||
if (srcString == null) return null;
|
||
if (trimString == null) return srcString;
|
||
if (strUtil.IsNullOrEmpty( srcString )) return String.Empty;
|
||
if (srcString.StartsWith( trimString ) == false) return srcString;
|
||
return srcString.Substring( trimString.Length );
|
||
}
|
||
|
||
/// <summary>
|
||
/// 将 html 中的脚本从各个部位，全部挪到页脚，以提高网页加载速度
|
||
/// </summary>
|
||
/// <param name="html"></param>
|
||
/// <returns></returns>
|
||
public static String ResetScript( String html ) {
|
||
|
||
Regex reg = new Regex( "<script.*?</script>", RegexOptions.Singleline );
|
||
|
||
MatchCollection mlist = reg.Matches( html );
|
||
StringBuilder sb = new StringBuilder();
|
||
sb.Append( reg.Replace( html, "" ) );
|
||
|
||
for (int i = 0; i < mlist.Count; i++) {
|
||
sb.Append( mlist[i].Value );
|
||
}
|
||
return sb.ToString();
|
||
}
|
||
|
||
/// <summary>
|
||
/// 将字符串分割成平均的n等份，每份长度为count
|
||
/// </summary>
|
||
/// <param name="str"></param>
|
||
/// <param name="count"></param>
|
||
/// <returns></returns>
|
||
public static List<String> SplitByNum( String str, int count ) {
|
||
|
||
List<String> list = new List<string>();
|
||
|
||
if (str == null) return list;
|
||
if (str.Length == 0) {
|
||
list.Add( str );
|
||
return list;
|
||
}
|
||
|
||
if (count <= 0) {
|
||
list.Add( str );
|
||
return list;
|
||
}
|
||
|
||
int k = 0;
|
||
StringBuilder sb = new StringBuilder();
|
||
for (int i = 0; i < str.Length; i++) {
|
||
|
||
if (k == count) {
|
||
list.Add( sb.ToString() );
|
||
k = 0;
|
||
sb = new StringBuilder();
|
||
}
|
||
|
||
sb.Append( str[i] );
|
||
|
||
k++;
|
||
}
|
||
|
||
if (sb.Length > 0) list.Add( sb.ToString() );
|
||
|
||
return list;
|
||
}
|
||
|
||
/// <summary>
|
||
/// 将 html 中空白字符和空白标记(&nbsp;)剔除掉
|
||
/// </summary>
|
||
/// <param name="val"></param>
|
||
/// <returns></returns>
|
||
public static String TrimHtml( String val ) {
|
||
|
||
if (val == null) return null;
|
||
val = val.Trim();
|
||
|
||
String text = ParseHtml( val );
|
||
text = trimHtmlBlank( text );
|
||
if (strUtil.IsNullOrEmpty( text ) && hasNotImg( val ) && hasNotFlash( val )) return "";
|
||
|
||
val = trimHtmlBlank( val );
|
||
return val;
|
||
}
|
||
|
||
private static String trimHtmlBlank( String text ) {
|
||
|
||
if (text == null) return null;
|
||
text = text.Trim();
|
||
|
||
if (text.StartsWith( htmlBlank ) || text.EndsWith( htmlBlank )) {
|
||
while (true) {
|
||
text = strUtil.TrimStart( text, htmlBlank ).Trim();
|
||
text = strUtil.TrimEnd( text, htmlBlank ).Trim();
|
||
if (!text.StartsWith( htmlBlank ) && !text.EndsWith( htmlBlank )) break;
|
||
}
|
||
}
|
||
|
||
return text;
|
||
}
|
||
|
||
private static Boolean hasNotImg( String val ) {
|
||
if (val.ToLower().IndexOf( "<img " ) >= 0) return false;
|
||
return true;
|
||
}
|
||
|
||
private static Boolean hasNotFlash( String val ) {
|
||
if (val.ToLower().IndexOf( "x-shockwave-flash" ) >= 0) return false;
|
||
return true;
|
||
}
|
||
|
||
private static readonly String htmlBlank = " ";
|
||
|
||
|
||
|
||
}
|
||
}
|
||
|