javascript雪花算法ID生成库simple-flakeid
2021/10/31 11:10:34
本文主要是介绍javascript雪花算法ID生成库simple-flakeid,对大家解决编程问题具有一定的参考价值,需要的程序猿们随着小编来一起学习吧!
开源地址:https://github.com/zhupengfeivip/simple-flakeId
核心算法版权属于 yitter](https://github.com/yitter))
项目更多介绍参照:https://github.com/yitter/idgenerator
本项目是在此库优化而来,遵循开源原则,完全开源。
install
npm i simple-flakeid
function
function NextId()
根据输出数值判断,小于number最大值时输出number类型,大于时输出bigint
function NextNumber()
始终输出number类型,超过时throw error
function NextBigId()
始终输出bigint类型
js demo
const snowId = require('simple-flakeid') let gen1 = new snowId.SnowflakeIdv1({ workerId: 1 }) for (let i = 0; i < 10; i++) { let id1 = gen1.NextId() console.log(`${i} ID:${id1} ${typeof id1} length:${id1.toString().length}`) }
output:
$ node js/demo1.js 0 ID:235100305752133 number length:15 1 ID:235100305772613 number length:15 2 ID:235100305776709 number length:15 3 ID:235100305776710 number length:15 4 ID:235100305776711 number length:15 5 ID:235100305776712 number length:15 6 ID:235100305776713 number length:15 7 ID:235100305780805 number length:15 8 ID:235100305780806 number length:15 9 ID:235100305780807 number length:15
const snowId = require('simple-flakeid') let gen1 = new snowId.SnowflakeIdv1({ workerId: 1 }) for (let i = 0; i < 10; i++) { let id1 = gen1.NextBigId() console.log(`${i} ID:${id1} ${typeof id1} length:${id1.toString().length}`) }
output:
$ node js/demo2.js 0 ID:235104756604997 bigint length:15 1 ID:235104756629573 bigint length:15 2 ID:235104756629574 bigint length:15 3 ID:235104756629575 bigint length:15 4 ID:235104756629576 bigint length:15 5 ID:235104756629577 bigint length:15 6 ID:235104756633669 bigint length:15 7 ID:235104756633670 bigint length:15 8 ID:235104756633671 bigint length:15 9 ID:235104756633672 bigint length:15
ts demo
import { SnowflakeIdv1 } from "../index" let gen1 = new SnowflakeIdv1({ workerId: 1 }) for (let i = 0; i < 10; i++) { let id1 = gen1.NextId() console.log(`${i} ID:${id1} ${typeof id1} length:${id1.toString().length}`) }
output:
$ ts-node ts/demo1.ts 0 ID:235099434217541 number length:15 1 ID:235099434225733 number length:15 2 ID:235099434225734 number length:15 3 ID:235099434225735 number length:15 4 ID:235099434225736 number length:15 5 ID:235099434229829 number length:15 6 ID:235099434229830 number length:15 7 ID:235099434229831 number length:15 8 ID:235099434229832 number length:15 9 ID:235099434233925 number length:15
更多示例代码:https://github.com/zhupengfeivip/simple-flakeId-demo.git
包含在API中如何处理bigint的长度问题,请看示例代码
其他帮助
在mysql中int类型最大长度是10位数字,由于本算法默认生成的是15位,最短也是11位,所以在mysql中需要使用bigint数据类型
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