diff --git a/util/string.go b/util/string.go
index da3a050..3d1074a 100644
--- a/util/string.go
+++ b/util/string.go
@@ -54,6 +54,9 @@ func Md5(str string) string {
 //
 // Date : 4:58 下午 2021/10/25
 func SnakeCaseToCamel(str string) string {
+	if len(str) == 0 {
+		return ""
+	}
 	builder := strings.Builder{}
 	index := 0
 	if str[0] >= 'a' && str[0] <= 'z' {