javaScript字符串工具類StringUtils詳解

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, ' '); 
  }, 
  //生成指定個(gè)數(shù)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; 
  }, 
  //首小寫(xiě)字母轉(zhuǎn)大寫(xiě) 
  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(); 
   }); 
  }, 
  //首大寫(xiě)字母轉(zhuǎn)小寫(xiě) 
  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(); 
   }); 
  }, 
  //大寫(xiě)轉(zhuǎn)小寫(xiě)，小寫(xiě)轉(zhuǎn)大寫(xiě) 
  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(); 
    } 
   }); 
  }, 
  //統(tǒng)計(jì)含有的子字符串的個(gè)數(shù) 
  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、數(shù)字 
  isAlphanumeric: function(input) { 
   return /^[a-z0-9]+$/i.test(input); 
  }, 
  //只包含字母、數(shù)字和空格 
  isAlphanumericSpace: function(input) { 
   return /^[a-z0-9\s]*$/i.test(input); 
  }, 
  //數(shù)字 
  isNumeric: function(input) { 
   return /^(?:[1-9]\d*|0)(?:\.\d+)?$/.test(input); 
  }, 
  //小數(shù) 
  isDecimal: function(input) { 
   return /^[-+]?(?:0|[1-9]\d*)\.\d+$/.test(input); 
  }, 
  //負(fù)小數(shù) 
  isNegativeDecimal: function(input) { 
   return /^\-?(?:0|[1-9]\d*)\.\d+$/.test(input); 
  }, 
  //正小數(shù) 
  isPositiveDecimal: function(input) { 
   return /^\+?(?:0|[1-9]\d*)\.\d+$/.test(input); 
  }, 
  //整數(shù) 
  isInteger: function(input) { 
   return /^[-+]?(?:0|[1-9]\d*)$/.test(input); 
  }, 
  //正整數(shù) 
  isPositiveInteger: function(input) { 
   return /^\+?(?:0|[1-9]\d*)$/.test(input); 
  }, 
  //負(fù)整數(shù) 
  isNegativeInteger: function(input) { 
   return /^\-?(?:0|[1-9]\d*)$/.test(input); 
  }, 
  //只包含數(shù)字和空格 
  isNumericSpace: function(input) { 
   return /^[\d\s]*$/.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; 
  }, 
  //字符串反轉(zhuǎn) 
  reverse: function(input) { 
   if(this.isBlank(input)) { 
    input; 
   } 
   return input.split("").reverse().join(""); 
  }, 
  //刪掉特殊字符(英文狀態(tài)下) 
  removeSpecialCharacter: function(input) { 
   return input.replace(/[!-/:-@\[-`{-~]/g, ""); 
  }, 
  //只包含特殊字符、數(shù)字和字母（不包括空格，若想包括空格，改為[ -~]） 
  isSpecialCharacterAlphanumeric: function(input) { 
   return /^[!-~]+$/.test(input); 
  }, 
  /** 
   * 校驗(yàn)時(shí)排除某些字符串，即不能包含某些字符串 
   * @param {Object} conditions:里面有多個(gè)屬性，如下： 
   * 
   * @param {String} matcherFlag 匹配標(biāo)識(shí) 
   * 0:數(shù)字；1：字母；2：小寫(xiě)字母；3:大寫(xiě)字母；4：特殊字符,指英文狀態(tài)下的標(biāo)點(diǎn)符號(hào)及括號(hào)等；5:中文; 
   * 6:數(shù)字和字母；7：數(shù)字和小寫(xiě)字母；8：數(shù)字和大寫(xiě)字母；9：數(shù)字、字母和特殊字符；10：數(shù)字和中文； 
   * 11：小寫(xiě)字母和特殊字符；12：大寫(xiě)字母和特殊字符；13：字母和特殊字符；14：小寫(xiě)字母和中文；15：大寫(xiě)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、小寫(xiě)字母和中文；20：特殊字符、大寫(xiě)字母和中文； 
   * 100：所有字符; 
   * @param {Array} excludeStrArr 排除的字符串，數(shù)組格式 
   * @param {String} length 長(zhǎng)度，可為空。1,2表示長(zhǎng)度1到2之間；10，表示10個(gè)以上字符；5表示長(zhǎng)度為5 
   * @param {Boolean} ignoreCase 是否忽略大小寫(xiě) 
   * conditions={matcherFlag:"0",excludeStrArr:[],length:"",ignoreCase:true} 
   */ 
  isPatternMustExcludeSomeStr: function(input, conditions) { 
   //參數(shù) 
   var matcherFlag = conditions.matcherFlag; 
   var excludeStrArr = conditions.excludeStrArr; 
   var length = conditions.length; 
   var ignoreCase = conditions.ignoreCase; 
   //拼正則 
   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]; 
   }); 
  }, 
  /** 
   * 把連續(xù)出現(xiàn)多次的字母字符串進(jìn)行壓縮。如輸入:aaabbbbcccccd 輸出: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; 
   }); 
  }, 
  /** 
   * 校驗(yàn)必須同時(shí)包含某些字符串 
   * @param {String} input 
   * @param {Object} conditions:里面有多個(gè)屬性，如下： 
   * 
   * @param {String} matcherFlag 匹配標(biāo)識(shí) 
   * 0:數(shù)字；1：字母；2：小寫(xiě)字母；3:大寫(xiě)字母；4：特殊字符,指英文狀態(tài)下的標(biāo)點(diǎn)符號(hào)及括號(hào)等；5:中文; 
   * 6:數(shù)字和字母；7：數(shù)字和小寫(xiě)字母；8：數(shù)字和大寫(xiě)字母；9：數(shù)字、字母和特殊字符；10：數(shù)字和中文； 
   * 11：小寫(xiě)字母和特殊字符；12：大寫(xiě)字母和特殊字符；13：字母和特殊字符；14：小寫(xiě)字母和中文；15：大寫(xiě)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、小寫(xiě)字母和中文；20：特殊字符、大寫(xiě)字母和中文； 
   * 100：所有字符; 
   * @param {Array} excludeStrArr 排除的字符串，數(shù)組格式 
   * @param {String} length 長(zhǎng)度，可為空。1,2表示長(zhǎng)度1到2之間；10，表示10個(gè)以上字符；5表示長(zhǎng)度為5 
   * @param {Boolean} ignoreCase 是否忽略大小寫(xiě) 
   * conditions={matcherFlag:"0",containStrArr:[],length:"",ignoreCase:true} 
   * 
   */ 
  isPatternMustContainSomeStr: function(input, conditions) { 
   //參數(shù) 
   var matcherFlag = conditions.matcherFlag; 
   var containStrArr = conditions.containStrArr; 
   var length = conditions.length; 
   var ignoreCase = conditions.ignoreCase; 
   //創(chuàng)建正則 
   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 += "$"; 
   var pattern = new RegExp(regex, ignoreCase ? "i" : ""); 
   return pattern.test(input); 
  }, 
  //中文校驗(yàn) 
  isChinese: function(input) { 
   return /^[\u4E00-\u9FA5]+$/.test(input); 
  }, 
  //去掉中文字符 
  removeChinese: function(input) { 
   return input.replace(/[\u4E00-\u9FA5]+/gm, ""); 
  }, 
  //轉(zhuǎn)義元字符 
  escapeMetacharacter: function(input) { 
   var metacharacter = "^$()*+.[]|\\-?{}|"; 
   if(metacharacter.indexOf(input) >= 0) { 
    input = "\\" + input; 
   } 
   return input; 
  }, 
  //轉(zhuǎn)義字符串中的元字符 
  escapeMetacharacterOfStr: function(input) { 
   return input.replace(/[\^\$\*\+\.
\|\\\-\?\{\}\|]/gm, "\\$&"); 
  } 
 
 };