javaScript字符串工具类StringUtils详解

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:aaabbbbcd 输出:3a4b5cd 
    @param {String} input 
    @param {Boolean} ignoreCase : true or false 
   / 
  pressRepeatedStr: 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 = "^$()+.[]|\\-?{}|"; 
   if(metacharacter.indexOf(input) >= 0) { 
    input = "\\" + input; 
   } 
   return input; 
  }, 
  //转义字符串中的元字符 
  escapeMetacharacterOfStr: function(input) { 
   return input.replace(/[\^\$\\+\.
\|\\\-\?\{\}\|]/gm, "\\$&"); 
  } 
 
 };