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  • 前端生成 guid 的方法

    参考:
    javascript - How to create a GUID / UUID - Stack Overflow
    https://stackoverflow.com/questions/105034/how-to-create-a-guid-uuid

    /**
         * 生成一个 uuid/guid
         */
        $.uuid = $.uuidv4 = function () {
            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);
            });
        }
    
        /**
         * 生成一个 uuid/guid,es6的版本
         */
        $.uuides6 = $.uuidv4es6 = function () {
            return ([1e7] + -1e3 + -4e3 + -8e3 + -1e11).replace(/[018]/g, c =>
                (c ^ crypto.getRandomValues(new Uint8Array(1))[0] & 15 >> c / 4).toString(16)
            );
        }
    

    构建 guid 对象

    newGuid 1 2 3 分别有现有的常见的三个生成方法

    var GuidBuilder = function () {
        /**
         * 表示全局唯一标识符 (GUID)对象
         * @param {*} guidString guid 字符串
         */
        var Guid = function (guidString) {
            //存放guid 32位数值的数组
            this.list = [];
            this.isGuid = true;
            //如果构造函数的参数为字符串
            if (typeof (guidString) == "string") {
                this.initByString(guidString);
            } else {
                this.initByOther();
            }
        };
        /**
         * 返回一个值,该值指示 Guid 的两个实例是否表示同一个值。
         * @param {Guid} otherGuid 
         */
        Guid.prototype.equals = function (otherGuid) {
            if (otherGuid === null ||
                otherGuid === undefined ||
                !otherGuid.isGuid) {
                return false;
            }
            return this.toString() === otherGuid.toString();
        };
    
        /**
         * 由字符串加载
         * @param {*} guidString 
         */
        Guid.prototype.initByString = function (guidString) {
            guidString = guidString.replace(/{|(|)|}|-/g, "");
            guidString = guidString.toLowerCase();
    
            //如果不是guid字符串,生成全零 guid
            if (guidString.length != 32 ||
                guidString.search(/[^0-9,a-f]/i) != -1
            ) {
                this.initByOther(this.list);
            } else {
                this.list = guidString.split('');
            }
        };
        /**
         * 由其他类型加载
         */
        Guid.prototype.initByOther = function () {
            var i = 32;
            while (i-- > 0) {
                this.list.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。
         * @param {String} format 
         * 
         * N  32 位: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
         * 
         * D  由连字符分隔的 32 位数字 xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
         * 
         * B  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)
         * 
         * @returns 
         */
        Guid.prototype.toString = function (format) {
            if (format === null || format === undefined) {
                format = "D";
            }
            format = format.toUpperCase();
            var formatArr = ["D", "N", "B", "P"];
            var isMatch = false;
            for (var i = 0; i < formatArr.length; i++) {
                var format1 = formatArr[i];
                if (format1 === format) {
                    isMatch = true;
                    break;
                }
            }
    
            if (!isMatch) {
                format = "D";
            }
    
            var listText = this.list.join("");
    
            switch (format) {
                case "N":
                    return listText.replace(/,/g, "");
                case "D":
                    var str = listText.slice(0, 8) + "-" +
                        listText.slice(8, 12) + "-" +
                        listText.slice(12, 16) + "-" +
                        listText.slice(16, 20) + "-" +
                        listText.slice(20, 32);
                    str = str.replace(/,/g, "");
                    return str;
                case "B":
                    var str = "{" + listText + "}";
                    return str;
                case "P":
                    var str = "(" + listText + ")";
                    return str;
                default:
                    return listText;
            }
        };
    
        //初始化 Guid 类的一个新实例。
        Guid.newGuid = function () {
            return newGuid1();
        }
    
        /**
         * 算法1
         * @returns 
         */
        Guid.newGuid1 = function () {
            var guidString = "";
            var i = 32;
            while (i-- > 0) {
                guidString += Math.floor(Math.random() * 16.0).toString(16);
            }
            return new Guid(guidString);
        }
    
        /**
         * 算法2
         * @returns 
         */
        Guid.newGuid2 = function () {
            var guidString = '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);
            });
            return new Guid(guidString);
        }
    
        /**
         * 算法3
         * @returns 
         */
        Guid.newGuid3 = function () {
            var guidString = ([1e7] + -1e3 + -4e3 + -8e3 + -1e11).replace(/[018]/g, c =>
                (c ^ crypto.getRandomValues(new Uint8Array(1))[0] & 15 >> c / 4).toString(16)
            );
            return new Guid(guidString);
        }
    
        //Guid 类的默认实例,其值保证均为零。
        Guid.empty = new Guid();
    
        return Guid;
    };
    
    var Guid = GuidBuilder();
    
    Guid.newGuid().toString();
    
    生活,有时候就是很简单,有时候却很要命。
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  • 原文地址:https://www.cnblogs.com/DHclly/p/15503778.html
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