js生成guid

本文主要是介绍js生成guid，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

        //表示全局唯一标识符 (GUID)。function Guid(g) {var arr = new Array(); //存放32位数值的数组if (typeof (g) == "string") { //如果构造函数的参数为字符串InitByString(arr, g);}else {InitByOther(arr);}//返回一个值，该值指示 Guid 的两个实例是否表示同一个值。this.Equals = function (o) {if (o && o.IsGuid) {return this.ToString() == o.ToString();}else {return false;}}//Guid对象的标记this.IsGuid = function () { }//返回 Guid 类的此实例值的 String 表示形式。this.ToString = function (format) {if (typeof (format) == "string") {if (format == "N" || format == "D" || format == "B" || format == "P") {return ToStringWithFormat(arr, format);}else {return ToStringWithFormat(arr, "D");}}else {return ToStringWithFormat(arr, "D");}}//由字符串加载function InitByString(arr, g) {g = g.replace(/\{|\(|\)|\}|-/g, "");g = g.toLowerCase();if (g.length != 32 || g.search(/[^0-9,a-f]/i) != -1) {InitByOther(arr);}else {for (var i = 0; i < g.length; i++) {arr.push(g[i]);}}}//由其他类型加载function InitByOther(arr) {var i = 32;while (i--) {arr.push("0");}}/*根据所提供的格式说明符，返回此 Guid 实例值的 String 表示形式。N  32 位： xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxD  由连字符分隔的 32 位数字 xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxxB  括在大括号中、由连字符分隔的 32 位数字：{xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx}P  括在圆括号中、由连字符分隔的 32 位数字：(xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx)*/function ToStringWithFormat(arr, format) {switch (format) {case "N":return arr.toString().replace(/,/g, "");case "D":var str = arr.slice(0, 8) + "-" + arr.slice(8, 12) + "-" + arr.slice(12, 16) + "-" + arr.slice(16, 20) + "-" + arr.slice(20, 32);str = str.replace(/,/g, "");return str;case "B":var str = ToStringWithFormat(arr, "D");str = "{" + str + "}";return str;case "P":var str = ToStringWithFormat(arr, "D");str = "(" + str + ")";return str;default:return new Guid();}}}//Guid 类的默认实例，其值保证均为零。Guid.Empty = new Guid();//初始化 Guid 类的一个新实例。Guid.NewGuid = function () {var g = "";var i = 32;while (i--) {g += Math.floor(Math.random() * 16.0).toString(16);}return new Guid(g);}

实例：

var guid=Guid.NewGuid();
alert(guid.ToString());

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