字符串工具类，仅供参考

StringUtils = {isEmpty: function(input) {return input == null || input == '';},isNotEmpty: function(input) {return !this.isEmpty(input);},isBlank: function(input) {return input == null || /^\s*$/.test(input);},isNotBlank: function(input) {return !this.isBlank(input);},trim: function(input) {return input.replace(/^\s+|\s+$/, '');},trimToEmpty: function(input) {return input == null ? "" : this.trim(input);},startsWith: function(input, prefix) {return input.indexOf(prefix) === 0;},endsWith: function(input, suffix) {return input.lastIndexOf(suffix) === 0;},contains: function(input, searchSeq) {return input.indexOf(searchSeq) >= 0;},equals: function(input1, input2) {return input1 == input2;},equalsIgnoreCase: function(input1, input2) {return input1.toLocaleLowerCase() == input2.toLocaleLowerCase();},containsWhitespace: function(input) {return this.contains(input, ' ');},//生成指定个数的字符repeat: function(ch, repeatTimes) {var result = "";for(var i = 0; i < repeatTimes; i++) {result += ch;}return result;},deleteWhitespace: function(input) {return input.replace(/\s+/g, '');},rightPad: function(input, size, padStr) {return input + this.repeat(padStr, size);},leftPad: function(input, size, padStr) {return this.repeat(padStr, size) + input;},//首小写字母转大写capitalize: function(input) {var strLen = 0;if(input == null || (strLen = input.length) == 0) {return input;}return input.replace(/^[a-z]/, function(matchStr) {return matchStr.toLocaleUpperCase();});},//首大写字母转小写uncapitalize: function(input) {var strLen = 0;if(input == null || (strLen = input.length) == 0) {return input;}return input.replace(/^[A-Z]/, function(matchStr) {return matchStr.toLocaleLowerCase();});},//大写转小写，小写转大写swapCase: function(input) {return input.replace(/[a-z]/ig, function(matchStr) {if(matchStr >= 'A' && matchStr <= 'Z') {return matchStr.toLocaleLowerCase();} else if(matchStr >= 'a' && matchStr <= 'z') {return matchStr.toLocaleUpperCase();}});},//统计含有的子字符串的个数countMatches: function(input, sub) {if(this.isEmpty(input) || this.isEmpty(sub)) {return 0;}var count = 0;var index = 0;while((index = input.indexOf(sub, index)) != -1) {index += sub.length;count++;}return count;},//只包含字母isAlpha: function(input) {return /^[a-z]+$/i.test(input);},//只包含字母、空格isAlphaSpace: function(input) {return /^[a-z\s]*$/i.test(input);},//只包含字母、数字isAlphanumeric: function(input) {return /^[a-z0-9]+$/i.test(input);},//只包含字母、数字和空格isAlphanumericSpace: function(input) {return /^[a-z0-9\s]*$/i.test(input);},//数字isNumeric: function(input) {return /^(?:[1-9]\d*|0)(?:\.\d+)?$/.test(input);},//小数isDecimal: function(input) {return /^[-+]?(?:0|[1-9]\d*)\.\d+$/.test(input);},//负小数isNegativeDecimal: function(input) {return /^\-?(?:0|[1-9]\d*)\.\d+$/.test(input);},//正小数isPositiveDecimal: function(input) {return /^\+?(?:0|[1-9]\d*)\.\d+$/.test(input);},//整数isInteger: function(input) {return /^[-+]?(?:0|[1-9]\d*)$/.test(input);},//正整数isPositiveInteger: function(input) {return /^\+?(?:0|[1-9]\d*)$/.test(input);},//负整数isNegativeInteger: function(input) {return /^\-?(?:0|[1-9]\d*)$/.test(input);},//只包含数字和空格isNumericSpace: function(input) {return /^[\d\s]*$/.test(input);},isWhitespace: function(input) {return /^\s*$/.test(input);},isAllLowerCase: function(input) {return /^[a-z]+$/.test(input);},isAllUpperCase: function(input) {return /^[A-Z]+$/.test(input);},defaultString: function(input, defaultStr) {return input == null ? defaultStr : input;},defaultIfBlank: function(input, defaultStr) {return this.isBlank(input) ? defaultStr : input;},defaultIfEmpty: function(input, defaultStr) {return this.isEmpty(input) ? defaultStr : input;},//字符串反转reverse: function(input) {if(this.isBlank(input)) {input;}return input.split("").reverse().join("");},//删掉特殊字符(英文状态下)removeSpecialCharacter: function(input) {return input.replace(/[!-/:-@\[-`{-~]/g, "");},//只包含特殊字符、数字和字母（不包括空格，若想包括空格，改为[ -~]）isSpecialCharacterAlphanumeric: function(input) {return /^[!-~]+$/.test(input);},/*** 校验时排除某些字符串，即不能包含某些字符串* @param {Object} conditions:里面有多个属性，如下：* * @param {String} matcherFlag 匹配标识* 0:数字；1：字母；2：小写字母；3:大写字母；4：特殊字符,指英文状态下的标点符号及括号等；5:中文;* 6:数字和字母；7：数字和小写字母；8：数字和大写字母；9：数字、字母和特殊字符；10：数字和中文；* 11：小写字母和特殊字符；12：大写字母和特殊字符；13：字母和特殊字符；14：小写字母和中文；15：大写字母和中文；* 16：字母和中文；17：特殊字符、和中文；18：特殊字符、字母和中文；19：特殊字符、小写字母和中文；20：特殊字符、大写字母和中文；* 100：所有字符;* @param {Array} excludeStrArr 排除的字符串，数组格式* @param {String} length 长度，可为空。1,2表示长度1到2之间；10，表示10个以上字符；5表示长度为5* @param {Boolean} ignoreCase 是否忽略大小写* conditions={matcherFlag:"0",excludeStrArr:[],length:"",ignoreCase:true}*/isPatternMustExcludeSomeStr: function(input, conditions) {//参数var matcherFlag = conditions.matcherFlag;var excludeStrArr = conditions.excludeStrArr;var length = conditions.length;var ignoreCase = conditions.ignoreCase;//拼正则var size = excludeStrArr.length;var regex = (size == 0) ? "^" : "^(?!.*(?:{0}))";var subPattern = "";for(var i = 0; i < size; i++) {excludeStrArr[i] = Bee.StringUtils.escapeMetacharacterOfStr(excludeStrArr[i]);subPattern += excludeStrArr[i];if(i != size - 1) {subPattern += "|";}}regex = this.format(regex, [subPattern]);switch(matcherFlag) {case '0':regex += "\\d";break;case '1':regex += "[a-zA-Z]";break;case '2':regex += "[a-z]";break;case '3':regex += "[A-Z]";break;case '4':regex += "[!-/:-@\[-`{-~]";break;case '5':regex += "[\u4E00-\u9FA5]";break;case '6':regex += "[a-zA-Z0-9]";break;case '7':regex += "[a-z0-9]";break;case '8':regex += "[A-Z0-9]";break;case '9':regex += "[!-~]";break;case '10':regex += "[0-9\u4E00-\u9FA5]";break;case '11':regex += "[a-z!-/:-@\[-`{-~]";break;case '12':regex += "[A-Z!-/:-@\[-`{-~]";break;case '13':regex += "[a-zA-Z!-/:-@\[-`{-~]";break;case '14':regex += "[a-z\u4E00-\u9FA5]";break;case '15':regex += "[A-Z\u4E00-\u9FA5]";break;case '16':regex += "[a-zA-Z\u4E00-\u9FA5]";break;case '17':regex += "[\u4E00-\u9FA5!-/:-@\[-`{-~]";break;case '18':regex += "[\u4E00-\u9FA5!-~]";break;case '19':regex += "[a-z\u4E00-\u9FA5!-/:-@\[-`{-~]";break;case '20':regex += "[A-Z\u4E00-\u9FA5!-/:-@\[-`{-~]";break;case '100':regex += "[\s\S]";break;default:alert(matcherFlag + ":This type is not supported!");}regex += this.isNotBlank(length) ? "{" + length + "}" : "+";regex += "$";var pattern = new RegExp(regex, ignoreCase ? "i" : "");return pattern.test(input);},/*** @param {String} message* @param {Array} arr* 消息格式化*/format: function(message, arr) {return message.replace(/{(\d+)}/g, function(matchStr, group1) {return arr[group1];});},/*** 把连续出现多次的字母字符串进行压缩。如输入:aaabbbbcccccd  输出:3a4b5cd* @param {String} input* @param {Boolean} ignoreCase : true or false */compressRepeatedStr: function(input, ignoreCase) {var pattern = new RegExp("([a-z])\\1+", ignoreCase ? "ig" : "g");return result = input.replace(pattern, function(matchStr, group1) {return matchStr.length + group1;});},/*** 校验必须同时包含某些字符串* @param {String} input* @param {Object} conditions:里面有多个属性，如下：* * @param {String} matcherFlag 匹配标识* 0:数字；1：字母；2：小写字母；3:大写字母；4：特殊字符,指英文状态下的标点符号及括号等；5:中文;* 6:数字和字母；7：数字和小写字母；8：数字和大写字母；9：数字、字母和特殊字符；10：数字和中文；* 11：小写字母和特殊字符；12：大写字母和特殊字符；13：字母和特殊字符；14：小写字母和中文；15：大写字母和中文；* 16：字母和中文；17：特殊字符、和中文；18：特殊字符、字母和中文；19：特殊字符、小写字母和中文；20：特殊字符、大写字母和中文；* 100：所有字符;* @param {Array} excludeStrArr 排除的字符串，数组格式* @param {String} length 长度，可为空。1,2表示长度1到2之间；10，表示10个以上字符；5表示长度为5* @param {Boolean} ignoreCase 是否忽略大小写* conditions={matcherFlag:"0",containStrArr:[],length:"",ignoreCase:true}* */isPatternMustContainSomeStr: function(input, conditions) {//参数var matcherFlag = conditions.matcherFlag;var containStrArr = conditions.containStrArr;var length = conditions.length;var ignoreCase = conditions.ignoreCase;//创建正则var size = containStrArr.length;var regex = "^";var subPattern = "";for(var i = 0; i < size; i++) {containStrArr[i] = Bee.StringUtils.escapeMetacharacterOfStr(containStrArr[i]);subPattern += "(?=.*" + containStrArr[i] + ")";}regex += subPattern;switch(matcherFlag) {case '0':regex += "\\d";break;case '1':regex += "[a-zA-Z]";break;case '2':regex += "[a-z]";break;case '3':regex += "[A-Z]";break;case '4':regex += "[!-/:-@\[-`{-~]";break;case '5':regex += "[\u4E00-\u9FA5]";break;case '6':regex += "[a-zA-Z0-9]";break;case '7':regex += "[a-z0-9]";break;case '8':regex += "[A-Z0-9]";break;case '9':regex += "[!-~]";break;case '10':regex += "[0-9\u4E00-\u9FA5]";break;case '11':regex += "[a-z!-/:-@\[-`{-~]";break;case '12':regex += "[A-Z!-/:-@\[-`{-~]";break;case '13':regex += "[a-zA-Z!-/:-@\[-`{-~]";break;case '14':regex += "[a-z\u4E00-\u9FA5]";break;case '15':regex += "[A-Z\u4E00-\u9FA5]";break;case '16':regex += "[a-zA-Z\u4E00-\u9FA5]";break;case '17':regex += "[\u4E00-\u9FA5!-/:-@\[-`{-~]";break;case '18':regex += "[\u4E00-\u9FA5!-~]";break;case '19':regex += "[a-z\u4E00-\u9FA5!-/:-@\[-`{-~]";break;case '20':regex += "[A-Z\u4E00-\u9FA5!-/:-@\[-`{-~]";break;case '100':regex += "[\s\S]";break;default:alert(matcherFlag + ":This type is not supported!");}regex += this.isNotBlank(length) ? "{" + length + "}" : "+";regex += "$";var pattern = new RegExp(regex, ignoreCase ? "i" : "");return pattern.test(input);},//中文校验isChinese: function(input) {return /^[\u4E00-\u9FA5]+$/.test(input);},//去掉中文字符removeChinese: function(input) {return input.replace(/[\u4E00-\u9FA5]+/gm, "");},//转义元字符escapeMetacharacter: function(input) {var metacharacter = "^$()*+.[]|\\-?{}";if(metacharacter.indexOf(input) >= 0) {input = "\\" + input;}return input;},//转义字符串中的元字符escapeMetacharacterOfStr: function(input) {return input.replace(/[-$^()*+.\[\]|\\?{}]/gm, "\\$&");},//中文转为unicode编码chineseToUnicode: function(input) {return input.replace(/[\u4E00-\u9FA5]/g, function(matchStr) {return "\\u" + matchStr.charCodeAt(0).toString(16);　　　　　　});}};