diff --git a/data_type.go b/data_type.go
index 273d02b..ec737e0 100644
--- a/data_type.go
+++ b/data_type.go
@@ -14,11 +14,11 @@ package consts
 // Date : 14:10 2024/11/25
 type DataType string
 
-func (df DataType) String() string {
-	return string(df)
+func (df *DataType) String() string {
+	return string(*df)
 }
 
-func (df DataType) MarshalJSON() ([]byte, error) {
+func (df *DataType) MarshalJSON() ([]byte, error) {
 	return []byte(df.String()), nil
 }
 
@@ -27,9 +27,9 @@ func (df DataType) MarshalJSON() ([]byte, error) {
 // Author : go_developer@163.com<白茶清欢>
 //
 // Date : 14:45 2024/11/25
-func (df DataType) IsValid() bool {
+func (df *DataType) IsValid() bool {
 	for _, item := range DataTypeList {
-		if item.Value == df {
+		if item.Value == *df {
 			return true
 		}
 	}
diff --git a/file_type.go b/file_type.go
index 73977d5..3db8248 100644
--- a/file_type.go
+++ b/file_type.go
@@ -9,15 +9,15 @@ package consts
 
 type FileType string
 
-func (ft FileType) String() string {
-	return string(ft)
+func (ft *FileType) String() string {
+	return string(*ft)
 }
 
-func (ft FileType) MarshalJSON() ([]byte, error) {
+func (ft *FileType) MarshalJSON() ([]byte, error) {
 	return []byte(ft.String()), nil
 }
 
-func (ft FileType) IsValid() bool {
+func (ft *FileType) IsValid() bool {
 	supportFileTypeList := []FileType{
 		FileTypeJson,
 		FileTypeIni,
@@ -28,7 +28,7 @@ func (ft FileType) IsValid() bool {
 		FileTypeTxt,
 	}
 	for _, fileType := range supportFileTypeList {
-		if fileType == ft {
+		if fileType == *ft {
 			return true
 		}
 	}
diff --git a/header.go b/header.go
index d0b9577..94f0697 100644
--- a/header.go
+++ b/header.go
@@ -9,11 +9,11 @@ package consts
 
 type HttpHeader string
 
-func (hh HttpHeader) String() string {
-	return string(hh)
+func (hh *HttpHeader) String() string {
+	return string(*hh)
 }
 
-func (hh HttpHeader) MarshalJSON() ([]byte, error) {
+func (hh *HttpHeader) MarshalJSON() ([]byte, error) {
 	return []byte(hh.String()), nil
 }
 
diff --git a/logger.go b/logger.go
index d6dc67c..f55b9a6 100644
--- a/logger.go
+++ b/logger.go
@@ -9,15 +9,15 @@ package consts
 
 type LogLevel string
 
-func (ll LogLevel) String() string {
-	return string(ll)
+func (ll *LogLevel) String() string {
+	return string(*ll)
 }
 
-func (ll LogLevel) MarshalJSON() ([]byte, error) {
+func (ll *LogLevel) MarshalJSON() ([]byte, error) {
 	return []byte(ll.String()), nil
 }
 
-func (ll LogLevel) IsValid() bool {
+func (ll *LogLevel) IsValid() bool {
 	levelList := []LogLevel{
 		LogLevelDebug,
 		LogLevelInfo,
@@ -26,7 +26,7 @@ func (ll LogLevel) IsValid() bool {
 		LogLevelPanic,
 	}
 	for _, level := range levelList {
-		if level == ll {
+		if level == *ll {
 			return true
 		}
 	}
diff --git a/logger_test.go b/logger_test.go
new file mode 100644
index 0000000..baafa04
--- /dev/null
+++ b/logger_test.go
@@ -0,0 +1,19 @@
+// Package consts ...
+//
+// Description : consts ...
+//
+// Author : go_developer@163.com<白茶清欢>
+//
+// Date : 2025-01-22 15:36
+package consts
+
+import (
+	"encoding/json"
+	"fmt"
+	"testing"
+)
+
+func TestLogLevel_String(t *testing.T) {
+	byteData, err := json.Marshal(LogLevelDebug)
+	fmt.Println(string(byteData), err)
+}
diff --git a/redis.go b/redis.go
index cb98ec6..dedf955 100644
--- a/redis.go
+++ b/redis.go
@@ -9,11 +9,11 @@ package consts
 
 type RedisCmd string
 
-func (rc RedisCmd) String() string {
-	return string(rc)
+func (rc *RedisCmd) String() string {
+	return string(*rc)
 }
 
-func (rc RedisCmd) MarshalJSON() ([]byte, error) {
+func (rc *RedisCmd) MarshalJSON() ([]byte, error) {
 	return []byte(rc.String()), nil
 }
 
diff --git a/request.go b/request.go
index efcedc1..6b79f49 100644
--- a/request.go
+++ b/request.go
@@ -38,17 +38,17 @@ func (rdl RequestDataLocation) IsValid() bool {
 // Date : 14:41 2024/11/25
 type ResponseDataLocation string
 
-func (rdl ResponseDataLocation) String() string {
-	return string(rdl)
+func (rdl *ResponseDataLocation) String() string {
+	return string(*rdl)
 }
 
-func (rdl ResponseDataLocation) MarshalJSON() ([]byte, error) {
+func (rdl *ResponseDataLocation) MarshalJSON() ([]byte, error) {
 	return []byte(rdl.String()), nil
 }
 
-func (rdl ResponseDataLocation) IsValid() bool {
+func (rdl *ResponseDataLocation) IsValid() bool {
 	for _, item := range ResponseDataLocationList {
-		if item.Value == rdl {
+		if item.Value == *rdl {
 			return true
 		}
 	}
diff --git a/scheme.go b/scheme.go
index fda9a86..bfdbe2f 100644
--- a/scheme.go
+++ b/scheme.go
@@ -9,11 +9,11 @@ package consts
 
 type HttpScheme string
 
-func (hs HttpScheme) String() string {
-	return string(hs)
+func (hs *HttpScheme) String() string {
+	return string(*hs)
 }
 
-func (hs HttpScheme) MarshalJSON() ([]byte, error) {
+func (hs *HttpScheme) MarshalJSON() ([]byte, error) {
 	return []byte(hs.String()), nil
 }