JavaScript生成GUID的方法

JavaScript生成GUID的方法
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  • 一、生成GUID的方法一
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  • JScript 代码   复制
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    function guid() {
        function S4() {
           return (((1+Math.random())*0x10000)|0).toString(16).substring(1);
        }
        return (S4()+S4()+"-"+S4()+"-"+S4()+"-"+S4()+"-"+S4()+S4()+S4());
    }
    
    		
  • 二、生成GUID的方法二

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  • JScript 代码   复制
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    function guid() {
        return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
            var r = Math.random()*16|0, v = c == 'x' ? r : (r&0x3|0x8);
            return v.toString(16);
        });
    }
    
    		
  • 三、生成GUID的方法三

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  • JScript 代码   复制
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    function uuid() {
        var s = [];
        var hexDigits = "0123456789abcdef";
        for (var i = 0; i < 36; i++) {
            s[i] = hexDigits.substr(Math.floor(Math.random() * 0x10), 1);
        }
        s[14] = "4";  // bits 12-15 of the time_hi_and_version field to 0010
        s[19] = hexDigits.substr((s[19] & 0x3) | 0x8, 1);  // bits 6-7 of the clock_seq_hi_and_reserved to 01
        s[8] = s[13] = s[18] = s[23] = "-";
     
        var uuid = s.join("");
        return uuid;
    }
    
    		
  • 四、生成GUID的方法四

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  • JScript 代码   复制
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    function uuid(len, radix) {
        var chars = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'.split('');
        var uuid = [], i;
        radix = radix || chars.length;
     
        if (len) {
          // Compact form
          for (i = 0; i < len; i++) uuid[i] = chars[0 | Math.random()*radix];
        } else {
          // rfc4122, version 4 form
          var r;
     
          // rfc4122 requires these characters
          uuid[8] = uuid[13] = uuid[18] = uuid[23] = '-';
          uuid[14] = '4';
     
          // Fill in random data.  At i==19 set the high bits of clock sequence as
          // per rfc4122, sec. 4.1.5
          for (i = 0; i < 36; i++) {
            if (!uuid[i]) {
              r = 0 | Math.random()*16;
              uuid[i] = chars[(i == 19) ? (r & 0x3) | 0x8 : r];
            }
          }
        }
     
        return uuid.join('');
    }
    
    		
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