improve converter feature for package gconv (#3211)

example/httpserver/default_value/main.go

@@ -1,3 +1,9 @@
+// Copyright GoFrame Author(https://goframe.org). All Rights Reserved.
+//
+// This Source Code Form is subject to the terms of the MIT License.
+// If a copy of the MIT was not distributed with this file,
+// You can obtain one at https://github.com/gogf/gf.
+
 package main
 
 import (

example/httpserver/proxy/main.go

@@ -1,3 +1,9 @@
+// Copyright GoFrame Author(https://goframe.org). All Rights Reserved.
+//
+// This Source Code Form is subject to the terms of the MIT License.
+// If a copy of the MIT was not distributed with this file,
+// You can obtain one at https://github.com/gogf/gf.
+
 package main
 
 import (

example/httpserver/rate/main.go

@@ -1,12 +1,19 @@
+// Copyright GoFrame Author(https://goframe.org). All Rights Reserved.
+//
+// This Source Code Form is subject to the terms of the MIT License.
+// If a copy of the MIT was not distributed with this file,
+// You can obtain one at https://github.com/gogf/gf.
+
 package main
 
 import (
 	"context"
 	"fmt"
 
+	"golang.org/x/time/rate"
+
 	"github.com/gogf/gf/v2/frame/g"
 	"github.com/gogf/gf/v2/net/ghttp"
-	"golang.org/x/time/rate"
 )
 
 type HelloReq struct {

example/httpserver/response_with_json_array/controller.go

@@ -1,3 +1,9 @@
+// Copyright GoFrame Author(https://goframe.org). All Rights Reserved.
+//
+// This Source Code Form is subject to the terms of the MIT License.
+// If a copy of the MIT was not distributed with this file,
+// You can obtain one at https://github.com/gogf/gf.
+
 package main
 
 import (

example/httpserver/response_with_json_array/main.go

@@ -1,3 +1,9 @@
+// Copyright GoFrame Author(https://goframe.org). All Rights Reserved.
+//
+// This Source Code Form is subject to the terms of the MIT License.
+// If a copy of the MIT was not distributed with this file,
+// You can obtain one at https://github.com/gogf/gf.
+
 package main
 
 import (

example/httpserver/swagger/main.go

@@ -1,3 +1,9 @@
+// Copyright GoFrame Author(https://goframe.org). All Rights Reserved.
+//
+// This Source Code Form is subject to the terms of the MIT License.
+// If a copy of the MIT was not distributed with this file,
+// You can obtain one at https://github.com/gogf/gf.
+
 package main
 
 import (