update example for gres

.example/os/gres/gres.go

@@ -1,12 +1,14 @@
 package main
 
 import (
-	_ "github.com/gogf/gf/.example/os/gres/testdata"
 	"github.com/gogf/gf/frame/g"
 	"github.com/gogf/gf/os/gres"
+	_ "github.com/gogf/gf/os/gres/testdata"
 )
 
 func main() {
 	gres.Dump()
 	g.Dump(gres.Scan("/root/image/", "*", true))
+	g.Dump(gres.Scan("/template", "*"))
+	g.Dump(gres.Scan("/template/layout2", "*.html", true))
 }

os/gres/gres_file.go

@@ -57,5 +57,6 @@ func (f *File) MarshalJSON() ([]byte, error) {
 		"name": f.Name(),
 		"size": info.Size(),
 		"time": info.ModTime(),
+		"file": !info.IsDir(),
 	})
 }