jiangbo0 2011-04-26
有时需要在前端生成UUID,可以在jsp中引用内容如下的文件UUID.js。
使用时直接用new生成即可
var uuidId = new UUID();
UUID.js
/* * * uuid.js - Version 0.3 JavaScript Class to create a UUID like identifier * * Copyright (C) 2006-2008, Erik Giberti (AF-Design), All rights reserved. * * This program is free software; you can redistribute it and/or modify it under * the terms of the GNU General Public License as published by the Free Software * Foundation; either version 2 of the License, or (at your option) any later * version. * * This program is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more * details. * * You should have received a copy of the GNU General Public License along with * this program; if not, write to the Free Software Foundation, Inc., 59 Temple * Place, Suite 330, Boston, MA 02111-1307 USA * * The latest version of this file can be downloaded from * http://www.af-design.com/resources/javascript_uuid.php * * HISTORY: 6/5/06 - Initial Release 5/22/08 - Updated code to run faster, * removed randrange(min,max) in favor of a simpler rand(max) function. Reduced * overhead by using getTime() method of date class (suggestion by James Hall). * 9/5/08 - Fixed a bug with rand(max) and additional efficiencies pointed out * by Robert Kieffer http://broofa.com/ * * KNOWN ISSUES: - Still no way to get MAC address in JavaScript - Research into * other versions of UUID show promising possibilities (more research needed) - * Documentation needs improvement * */ // On creation of a UUID object, set it's initial value function UUID() { this.id = this.createUUID(); } // When asked what this Object is, lie and return it's value UUID.prototype.valueOf = function() { return this.id; } UUID.prototype.toString = function() { return this.id; } // // INSTANCE SPECIFIC METHODS // UUID.prototype.createUUID = function() { // // Loose interpretation of the specification DCE 1.1: Remote Procedure Call // described at // http://www.opengroup.org/onlinepubs/009629399/apdxa.htm#tagtcjh_37 // since JavaScript doesn't allow access to internal systems, the last 48 // bits // of the node section is made up using a series of random numbers (6 octets // long). // var dg = new Date(1582, 10, 15, 0, 0, 0, 0); var dc = new Date(); var t = dc.getTime() - dg.getTime(); var tl = UUID.getIntegerBits(t, 0, 31); var tm = UUID.getIntegerBits(t, 32, 47); var thv = UUID.getIntegerBits(t, 48, 59) + '1'; // version 1, security version is 2 var csar = UUID.getIntegerBits(UUID.rand(4095), 0, 7); var csl = UUID.getIntegerBits(UUID.rand(4095), 0, 7); // since detection of anything about the machine/browser is far to buggy, // include some more random numbers here // if NIC or an IP can be obtained reliably, that should be put in // here instead. var n = UUID.getIntegerBits(UUID.rand(8191), 0, 7) + UUID.getIntegerBits(UUID.rand(8191), 8, 15) + UUID.getIntegerBits(UUID.rand(8191), 0, 7) + UUID.getIntegerBits(UUID.rand(8191), 8, 15) + UUID.getIntegerBits(UUID.rand(8191), 0, 15); // this last number is two octets long return tl + tm + thv + csar + csl + n; } // // GENERAL METHODS (Not instance specific) // // Pull out only certain bits from a very large integer, used to get the time // code information for the first part of a UUID. Will return zero's if there // aren't enough bits to shift where it needs to. UUID.getIntegerBits = function(val, start, end) { var base16 = UUID.returnBase(val, 16); var quadArray = new Array(); var quadString = ''; var i = 0; for (i = 0; i < base16.length; i++) { quadArray.push(base16.substring(i, i + 1)); } for (i = Math.floor(start / 4); i <= Math.floor(end / 4); i++) { if (!quadArray[i] || quadArray[i] == '') quadString += '0'; else quadString += quadArray[i]; } return quadString; } // Replaced from the original function to leverage the built in methods in // JavaScript. Thanks to Robert Kieffer for pointing this one out UUID.returnBase = function(number, base) { return (number).toString(base).toUpperCase(); } // pick a random number within a range of numbers // int b rand(int a); where 0 <= b <= a UUID.rand = function(max) { return Math.floor(Math.random() * (max + 1)); } // end of UUID class file