diff --git a/test/xml_test.go b/test/xml_test.go
new file mode 100644
index 0000000..e64a66e
--- /dev/null
+++ b/test/xml_test.go
@@ -0,0 +1,32 @@
+package test
+
+import (
+	"testing"
+)
+
+type Sub struct {
+	A string `xml:"a"`
+}
+type Test struct {
+	A int32  `json:"a" xml:"a"`
+	B bool   `json:"b" xml:"b"`
+	C string `json:"c" xml:"c"`
+	D Sub    `xml:"sub"`
+}
+
+func TestXml(t *testing.T) {
+	// x := map[string]interface{}{}
+	// x["map"] = 1
+	// x["ss"] = 2
+	// test := Test{A: 1, B: false, C: "hell", D: Sub{A: "aa"}}
+	// bytes, e := xml.Marshal(&test)
+	// if nil != e {
+	// 	t.Error(e.Error())
+
+	// }
+	// bytes, e = xml.Marshal(&x)
+	// if nil != e {
+	// 	t.Error(e.Error())
+
+	// }
+}
diff --git a/utils/reflect.go b/utils/reflect.go
index 46d17ea..847e884 100644
--- a/utils/reflect.go
+++ b/utils/reflect.go
@@ -131,6 +131,35 @@ func SameKind(typ1 reflect.Kind,typ2 reflect.Kind) bool{
 	return false
 }
 
+func UnmarshalWithTag(value interface{}, maps map[string]interface{},tag string){
+	if "" == tag{
+		return
+	}
+	valueof := reflect.ValueOf(value)
+	if !valueof.Elem().CanAddr(){
+		log.Print("should be addr")
+		return
+	}
+	remap := ReflectTagMap(valueof.Elem().Type())
+	_,ok := remap[tag]
+	if !ok{
+		return 
+	}
+	for k,v := range(maps){
+		log.Print(k)
+		if filedName,ok := remap["json"][k];ok{
+			log.Print(valueof.Elem().FieldByName(filedName).Kind(),reflect.TypeOf(v).Kind().String())
+			if SameKind(valueof.Elem().FieldByName(filedName).Kind(),reflect.TypeOf(v).Kind()){
+				if(valueof.Elem().FieldByName(filedName).CanSet()){
+					valueof.Elem().FieldByName(filedName).Set(reflect.ValueOf(v).Convert(valueof.Elem().FieldByName(filedName).Type()))
+				}
+			}
+		}
+	}
+}
+
+
+
 func UnmarshalJson(value interface{}, maps map[string]interface{}){
 	valueof := reflect.ValueOf(value)
 	if !valueof.Elem().CanAddr(){