Support Id6 Id8 Id10 Id12

Author: star3s

UniqueId.go

@@ -4,37 +4,61 @@ import (
 	"time"
 )
 
-const randMinNumber = 916132832
-const randMaxNumber = 56800235583
-const randNumber = randMaxNumber - randMinNumber
+const randMin6BitNumber = 916132832                          // 99999u (100000)
+const randMax6BitNumber = 56800235583                        // UUUUUU (999999)
+const rand6BitNumber = randMax6BitNumber - randMin6BitNumber // 6位
 
-const randMinShortNumber = 3844
-const randMaxShortNumber = 238327
-const randShortNumber = randMaxShortNumber - randMinShortNumber
+const randMin5BitNumber = 14776336                           // 9999u (10000)
+const randMax5BitNumber = 916132831                          // UUUUU (99999)
+const rand5BitNumber = randMax5BitNumber - randMin5BitNumber // 5位
+
+const randMin4BitNumber = 238328                             // 999u (1000)
+const randMax4BitNumber = 14776335                           // UUUU (9999)
+const rand4BitNumber = randMax4BitNumber - randMin4BitNumber // 4位
+
+const randMin3BitNumber = 3844                               // 99u (100)
+const randMax3BitNumber = 238327                             // UUU (999)
+const rand3BitNumber = randMax3BitNumber - randMin3BitNumber // 3位
 
 func UniqueId() string {
-	buf := EncodeInt(uint64(GlobalRand1.Int63n(randNumber) + randMinNumber))
+	buf := EncodeInt(uint64(GlobalRand1.Int63n(rand6BitNumber) + randMin6BitNumber))
 	buf = AppendInt(buf, uint64(time.Now().UnixNano()/1000))
-	buf = AppendInt(buf, uint64(GlobalRand2.Int63n(randNumber)+randMinNumber))
+	buf = AppendInt(buf, uint64(GlobalRand2.Int63n(rand6BitNumber)+randMin6BitNumber))
 	return string(cutId(buf, 20))
 }
 
 func ShortUniqueId() string {
-	buf := EncodeInt(uint64(GlobalRand1.Int63n(randShortNumber) + randMinShortNumber))
+	buf := EncodeInt(uint64(GlobalRand1.Int63n(rand3BitNumber) + randMin3BitNumber))
 	buf = AppendInt(buf, uint64(time.Now().UnixNano()/1000%(86400000000*100)))
-	buf = AppendInt(buf, uint64(GlobalRand2.Int63n(randShortNumber)+randMinShortNumber))
-	return string(buf)
+	buf = AppendInt(buf, uint64(GlobalRand2.Int63n(rand4BitNumber)+randMin4BitNumber))
+	return string(cutId(buf, 14))
 }
 
-func Id() string {
-	buf := EncodeInt(uint64(GlobalRand1.Int63n(randNumber) + randMinNumber))
-	buf = AppendInt(buf, uint64(GlobalRand2.Int63n(randNumber)+randMinNumber))
+// 约312303亿亿
+func Id12() string {
+	buf := EncodeInt(uint64(GlobalRand1.Int63n(rand6BitNumber) + randMin6BitNumber))
+	buf = AppendInt(buf, uint64(GlobalRand2.Int63n(rand6BitNumber)+randMin6BitNumber))
 	return string(cutId(buf, 12))
 }
 
-func ShortId() string {
-	buf := EncodeInt(uint64(GlobalRand1.Int63n(randShortNumber) + randMinShortNumber))
-	buf = AppendInt(buf, uint64(GlobalRand2.Int63n(randShortNumber)+randMinShortNumber))
+// 约81亿亿
+func Id10() string {
+	buf := EncodeInt(uint64(GlobalRand1.Int63n(rand5BitNumber) + randMin5BitNumber))
+	buf = AppendInt(buf, uint64(GlobalRand2.Int63n(rand5BitNumber)+randMin5BitNumber))
+	return string(cutId(buf, 10))
+}
+
+// 约 2113536亿
+func Id8() string {
+	buf := EncodeInt(uint64(GlobalRand1.Int63n(rand4BitNumber) + randMin4BitNumber))
+	buf = AppendInt(buf, uint64(GlobalRand2.Int63n(rand4BitNumber)+randMin4BitNumber))
+	return string(cutId(buf, 8))
+}
+
+// 约 550亿
+func Id6() string {
+	buf := EncodeInt(uint64(GlobalRand1.Int63n(rand3BitNumber) + randMin3BitNumber))
+	buf = AppendInt(buf, uint64(GlobalRand2.Int63n(rand3BitNumber)+randMin3BitNumber))
 	return string(cutId(buf, 6))
 }
 

UniqueId_test.go

@@ -6,6 +6,16 @@ import (
 	"testing"
 )
 
+//func TestId(t *testing.T) {
+//	for _, nx := range []string{"99u", "UUU", "999u", "UUUU", "9999u", "UUUUU", "99999u", "UUUUUU"} {
+//		fmt.Println(nx, u.DecodeInt([]byte(nx)))
+//	}
+//	for i:=0; i<10; i++ {
+//		dd := u.ShortUniqueId()
+//		fmt.Println(dd, len(dd))
+//	}
+//}
+
 func TestUniqueId(t *testing.T) {
 	fmt.Println(u.UniqueId())
 	uids := map[string]bool{}