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order.go
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order.go
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package function
import (
"fmt"
"math/rand"
"os"
"strconv"
"sync/atomic"
"time"
)
// CreateOrderNo 生成平台32位订单号 [不推荐使用]
func CreateOrderNo() (sn string) {
unixNano := now.UnixNano()
sn = now.Format(TimeLayoutYMDHIS)
timeStr := Int64ToString(unixNano)
rand.Seed(unixNano)
sn += timeStr[10:]
sn += strconv.Itoa(rand.Intn(10))
sn += strconv.Itoa(rand.Intn(10))
sn += strconv.Itoa(rand.Intn(10))
sn += strconv.Itoa(rand.Intn(10))
sn += strconv.Itoa(rand.Intn(10))
sn += strconv.Itoa(rand.Intn(10))
sn += strconv.Itoa(rand.Intn(10))
sn += strconv.Itoa(rand.Intn(10))
sn += strconv.Itoa(rand.Intn(10))
sn = fmt.Sprintf("%032s", sn)
return
}
var num int64
// GenerateOrderNo 生成24位订单号 [前面17位代表时间精确到毫秒,中间3位代表进程id,最后4位代表序号]
func GenerateOrderNo() string {
t := time.Now()
s := t.Format(TimeLayoutYMDHIS)
m := t.UnixNano()/1e6 - t.UnixNano()/1e9*1e3
ms := sup(m, 3)
p := os.Getpid() % 1000
ps := sup(int64(p), 3)
i := atomic.AddInt64(&num, 1)
r := i % 10000
rs := sup(r, 4)
n := fmt.Sprintf("%s%s%s%s", s, ms, ps, rs)
return n
}
//对长度不足n的数字前面补0
func sup(i int64, n int) string {
m := fmt.Sprintf("%d", i)
for len(m) < n {
m = fmt.Sprintf("0%s", m)
}
return m
}