随机字符串生成

app/utils/encrypt/encrypt.go

@@ -0,0 +1,37 @@
+package encrypt
+
+import (
+	"math/rand"
+	"unsafe"
+)
+
+const lettersString = "0123456789abcdefghijkmnpqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ"
+
+// 字符串长度
+const number = 16
+
+/*
+16位码，前15位随机字符串，最后一位通过前15位字符串计算校验生成
+*/
+
+func LotteryEncryptEncode() string {
+	b := make([]byte, number)
+	var sum byte
+	for i := 0; i < number-1; i++ {
+		b[i] = lettersString[rand.Int63()%int64(len(lettersString))]
+		sum += b[i]
+	}
+	b[number-1] = lettersString[sum%byte(len(lettersString))]
+	return *(*string)(unsafe.Pointer(&b))
+}
+
+func LotteryEncryptDecode(str string) bool {
+	var sum byte
+	for i := 0; i < len(str)-1; i++ {
+		sum += str[i]
+	}
+	if lettersString[sum%byte(len(lettersString))] != str[len(str)-1] {
+		return false
+	}
+	return true
+}

app/utils/encrypt/encrypt_test.go

@@ -0,0 +1,15 @@
+package encrypt
+
+import "testing"
+
+func TestLotteryEncryptEncode(t *testing.T) {
+	code := LotteryEncryptEncode()
+	t.Log(code)
+}
+
+func TestLotteryEncryptDecode(t *testing.T) {
+	code := LotteryEncryptEncode()
+	t.Log(code)
+	result := LotteryEncryptDecode(code)
+	t.Log(result)
+}