JavaScript生成GUID的方法

一、生成GUID的方法一

 

 

JScript 代码    复制

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

 

JScript 代码    复制

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

 

JScript 代码    复制

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

 

JScript 代码    复制

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(''); }