基于go的雪花算法--分布式ID生成

github 地址：https://github.com/bwmarrin/snowflake

获取包：

go get github.com/bwmarrin/snowflake

关于雪花算法的说明在 算法/雪花算法 目录中有详细说明。

代码实例：

package main

import (
    "fmt"

    "github.com/bwmarrin/snowflake"
)

func main() {

    // Create a new Node with a Node number of 1
    node, err := snowflake.NewNode(1)
    if err != nil {
        fmt.Println(err)
        return
    }

    // Generate a snowflake ID.
    id := node.Generate()

    // Print out the ID in a few different ways.
    fmt.Printf("Int64  ID: %d\n", id)
    fmt.Printf("String ID: %s\n", id)
    fmt.Printf("Base2  ID: %s\n", id.Base2())
    fmt.Printf("Base64 ID: %s\n", id.Base64())

    // Print out the ID's timestamp
    fmt.Printf("ID Time  : %d\n", id.Time())

    // Print out the ID's node number
    fmt.Printf("ID Node  : %d\n", id.Node())

    // Print out the ID's sequence number
    fmt.Printf("ID Step  : %d\n", id.Step())

    // Generate and print, all in one.
    fmt.Printf("ID       : %d\n", node.Generate().Int64())
}

源码中有一段关于起始时间的设置说明(默认为2010-01-04 01:42:54)：

// Epoch is set to the twitter snowflake epoch of Nov 04 2010 01:42:54 UTC in milliseconds
// You may customize this to set a different epoch for your application.
Epoch int64 = 1288834974657

可以自定义修改设置。