feat：完善项目

utils/rand.go

@@ -0,0 +1,42 @@
+package utils
+
+import (
+	"fmt"
+	"math/rand"
+	"strings"
+	"time"
+
+	uuid "github.com/satori/go.uuid"
+)
+
+const (
+	str = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
+)
+
+func GetUUID() string {
+	return uuid.NewV4().String()
+}
+
+func GetRandomCode(length int) string {
+	rand.Seed(time.Now().Unix())
+
+	code := make([]string, 0)
+
+	for i := 0; i < length; i++ {
+		code = append(code, fmt.Sprintf("%d", rand.Intn(10)))
+	}
+	return strings.Join(code, "")
+}
+
+func GetRandomString(length int) string {
+	bytes := []byte(str)
+
+	result := make([]byte, 0)
+
+	r := rand.New(rand.NewSource(time.Now().UnixNano()))
+
+	for i := 0; i < length; i++ {
+		result = append(result, bytes[r.Intn(len(bytes))])
+	}
+	return string(result)
+}