go语言雪花算法获取100000以内的数字

下面是 Go 语言实现雪花算法获取100000以内的数字的示例代码：

package main

import (
    "fmt"
    "math/rand"
    "time"
)

const (
    workerIDBits  = 5
    datacenterIDBits = 5
    maxWorkerID   = -1 ^ (-1 << workerIDBits)
    maxDatacenterID  = -1 ^ (-1 << datacenterIDBits)
    sequenceBits  = 12
    workerIDShift = sequenceBits
    datacenterIDShift = sequenceBits + workerIDBits
    timestampLeftShift = sequenceBits + workerIDBits + datacenterIDBits
    sequenceMask  = -1 ^ (-1 << sequenceBits)
)

type snowflake struct {
    lastTimestamp int64
    sequence      int64
    workerID      int64
    datacenterID  int64
}

func newSnowflake(workerID, datacenterID int64) *snowflake {
    if workerID < 0 || workerID > maxWorkerID {
        panic(fmt.Sprintf("Worker ID out of range: %d", workerID))
    }
    if datacenterID < 0 || datacenterID > maxDatacenterID {
        panic(fmt.Sprintf("Datacenter ID out of range: %d", datacenterID))
    }
    return &snowflake{
        workerID:     workerID,
        datacenterID: datacenterID,
    }
}

func (sf *snowflake) nextID() int64 {
    timestamp := time.Now().UnixNano() / 1000000
    if timestamp < sf.lastTimestamp {
        panic(fmt.Sprintf("Invalid timestamp: %v - precedes %v", timestamp, sf.lastTimestamp))
    }
    if timestamp == sf.lastTimestamp {
        sf.sequence = (sf.sequence + 1) & sequenceMask
        if sf.sequence == 0 {
            timestamp = sf.waitNextMillis(timestamp)
        }
    } else {
        sf.sequence = rand.Int63() & sequenceMask
    }
    sf.lastTimestamp = timestamp
    return (timestamp << timestampLeftShift) |
        (sf.datacenterID << datacenterIDShift) |
        (sf.workerID << workerIDShift) |
        sf.sequence
}

func (sf *snowflake) waitNextMillis(currentTimestamp int64) int64 {
    for currentTimestamp == sf.lastTimestamp {
        currentTimestamp = time.Now().UnixNano() / 1000000
    }
    return currentTimestamp
}

func main() {
    sf := newSnowflake(1, 1)
    for i := 0; i < 100000; i++ {
        fmt.Println(sf.nextID())
    }
}

在运行该程序时，会输出100000个雪花算法生成的 ID。