Detailed explanation of javaScript string tool class StringUtils

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Release: 2018-05-18 11:10:30
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本文主要为大家详细介绍了javaScript字符串工具类StringUtils,具有一定的参考价值,感兴趣的小伙伴们可以参考一下,希望能帮助到大家。

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 = "^$()*+.[]|\\-?{}|"; if(metacharacter.indexOf(input) >= 0) { input = "\\" + input; } return input; }, //转义字符串中的元字符 escapeMetacharacterOfStr: function(input) { return input.replace(/[\^\$\*\+\. \|\\\-\?\{\}\|]/gm, "\\$&"); } };
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