JavaScript生成UUID的五种方法详解

╰+哭是因爲堅強的太久メ 2023-10-09 23:18 40阅读 0赞

## UUID的介绍参考文章: [UUID简介以及java代码获取UUID示例\_java 获取uuid\_西晋的no1的博客-CSDN博客][UUID_java_UUID_java _uuid_no1_-CSDN] ##

##  ##

## **简介** ##

UUID(Universally Unique IDentifier) 全局唯一标识符。

UUID是一种由算法生成的二进制长度为128位的数字标识符。

UUID的格式为“xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx”，其中的 x 是 0-9 或 a-f

范围内的一个32位十六进制数。在理想情况下，任何计算机和计算机集群都不会生成两个相同的UUID。

## **1.****第一种** ##

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);
        });
    }
    console.log(guid())

![92bd364cbe5f430097309c023a825ad6.png][]

## **2.****第二种** ##

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;
    }
    console.log(uuid())

![52d4ce22bade4d9ab49f0fa2129bc761.png][]

## **3.****第三种** ##

function guid2() {
        function S4() {
            return (((1 + Math.random()) * 0x10000) | 0).toString(16).substring(1);
        }
        return (S4() + S4() + "-" + S4() + "-" + S4() + "-" + S4() + "-" + S4() + S4() + S4());
    }
    console.log(guid2())

![594e0b6cf68b4e03b87709d4f402adcc.png][]

## **4.****第四种** ##

// 指定长度和基数
    function uuid2(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('');
    }
    console.log(uuid2(16, 16))

![fd91e1d368eb4b33879f8e86359e837c.png][]

## **5.****第五种** ##

说明:生成32位UUID方法

function uuid() {
        var s = [];
        var hexDigits = "0123456789abcdef";
        for (var i = 0; i < 32; 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;
    }
    console.log(uuid())

![088c0d08b25243cebd8b3cc798c40715.png][]

[UUID_java_UUID_java _uuid_no1_-CSDN]: https://blog.csdn.net/xijinno1/article/details/129077281
[92bd364cbe5f430097309c023a825ad6.png]: https://img-blog.csdnimg.cn/92bd364cbe5f430097309c023a825ad6.png
[52d4ce22bade4d9ab49f0fa2129bc761.png]: https://img-blog.csdnimg.cn/52d4ce22bade4d9ab49f0fa2129bc761.png
[594e0b6cf68b4e03b87709d4f402adcc.png]: https://img-blog.csdnimg.cn/594e0b6cf68b4e03b87709d4f402adcc.png
[fd91e1d368eb4b33879f8e86359e837c.png]: https://img-blog.csdnimg.cn/fd91e1d368eb4b33879f8e86359e837c.png
[088c0d08b25243cebd8b3cc798c40715.png]: https://img-blog.csdnimg.cn/088c0d08b25243cebd8b3cc798c40715.png