init: initial commit
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@@ -0,0 +1,32 @@
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package uniqueid
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import (
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"fmt"
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"time"
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)
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func GenOrderNo() string {
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/*
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支付宝订单号示例:1217752501201407033233368028
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分析可能格式:
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- 前14位:时间戳(年月日时分秒)20250112 151420
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- 中间6位:商户/业务标识
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- 最后8位:随机数或序列号
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*/
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now := time.Now()
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// 时间部分:年月日时分秒
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timePart := now.Format("20060102150405") // 14位
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// 业务标识:机器ID + 进程ID + 随机数
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machineID := 1
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pid := now.Nanosecond() % 1000
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businessPart := fmt.Sprintf("%02d%03d%01d", machineID, pid, now.Second()%10) // 6位
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// 随机部分:纳秒取模
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random1 := fmt.Sprintf("%04d", now.Nanosecond()%10000)
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random2 := fmt.Sprintf("%04d", (now.Nanosecond()/10000)%10000)
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return timePart + businessPart + random1 + random2
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}
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