diff --git a/db/elasticEngine.go b/db/elasticEngine.go
index 9aaa9d9..c0e1f05 100644
--- a/db/elasticEngine.go
+++ b/db/elasticEngine.go
@@ -10,109 +10,107 @@ import (
 	"gopkg.in/olivere/elastic.v7"
 	"qiniupkg.com/x/log.v7"
 )
-const(
-	ERROR_PTR = "null pointer error"
-	INPUT_TYPE_ERROR = "wrong input parameter"
-	CREATED_ERROR = "create error"
-	DELETE_ERROR = "delete error"
-	INDEX_EXISTED = "index existed"
 
+const (
+	ERROR_PTR        = "null pointer error"
+	INPUT_TYPE_ERROR = "wrong input parameter"
+	CREATED_ERROR    = "create error"
+	DELETE_ERROR     = "delete error"
+	INDEX_EXISTED    = "index existed"
 )
-type  ElkEngine struct {
+
+type ElkEngine struct {
 	cli *elastic.Client
 }
 
-
-
-func (p *ElkEngine)Create(index string,types string,id string,data interface{}) (error)  {
-	if nil != p{
-		if (reflect.TypeOf(data).Kind() == reflect.String)  || (reflect.TypeOf(data).Kind() == reflect.Struct){
+func (p *ElkEngine) Create(index string, types string, id string, data interface{}) error {
+	if nil != p {
+		if (reflect.TypeOf(data).Kind() == reflect.String) || (reflect.TypeOf(data).Kind() == reflect.Struct) {
 			resp, err := p.cli.Index().
 				Index(index).
 				BodyJson(data).
 				Do(context.Background())
 			if err != nil {
-				log.Print("create error",err)
+				log.Print("create error", err)
 				return err
 			}
 			log.Print(resp)
-		}else{
+		} else {
 			log.Print(reflect.TypeOf(data).Kind())
 			return errors.New(INPUT_TYPE_ERROR)
 		}
-	}else{
+	} else {
 		return errors.New(ERROR_PTR)
 	}
 	return nil
 }
 
-func (p *ElkEngine)Delete(query elastic.Query,index string) error{
-	if nil != p{
+func (p *ElkEngine) Delete(query elastic.Query, index string) error {
+	if nil != p {
 		_, err := p.cli.DeleteByQuery().Index(index).Query(query).
 			Do(context.Background())
 		if err != nil {
 			log.Print(err)
-			return  err
+			return err
 		}
 
-	}else{
+	} else {
 		return errors.New(ERROR_PTR)
 	}
 	return nil
 }
-/*
 
-*/
-func (p *ElkEngine)Query(index string,query elastic.Query,typ reflect.Type,
-	limit int,offset int) ([]interface{},[]string,error) {
+func (p *ElkEngine) Query(index string, query elastic.Query, typ reflect.Type,
+	limit int, offset int) ([]interface{}, []string, error) {
 	rets := []interface{}{}
-	if nil != p{
-		if(limit == 0){
+	if nil != p {
+		if limit == 0 {
 			res, err := p.cli.Search(index).Query(query).Do(context.Background())
 			if err != nil {
 				print(err)
-				return  nil,nil,err
+				return nil, nil, err
 			}
-			
+
 			id := []string{}
-			for _,vs := range res.Hits.Hits{
-				id = append(id,vs.Id)
+			for _, vs := range res.Hits.Hits {
+				id = append(id, vs.Id)
 			}
-			return rets,id,nil
-		}else{
-			res, err := p.cli.Search(index).Query(query).Size(limit).From(limit*offset).Do(context.Background())
+			return rets, id, nil
+		} else {
+			res, err := p.cli.Search(index).Query(query).Size(limit).From(limit * offset).Do(context.Background())
 			if err != nil {
 				print(err)
-				return  nil,nil,err
+				return nil, nil, err
 			}
 			id := []string{}
-			for _,vs := range res.Hits.Hits{
-				id = append(id,vs.Id)
-				data,e  := vs.Source.MarshalJSON()
-				if nil != e{
+			for _, vs := range res.Hits.Hits {
+				id = append(id, vs.Id)
+				data, e := vs.Source.MarshalJSON()
+				if nil != e {
 					log.Print(e.Error())
 				}
-				obj := utils.ReflectMakeNew(typ)
 				mapobj := map[string]interface{}{}
-				e = json.Unmarshal(data,&mapobj)
-				if nil != e{
+				e = json.Unmarshal(data, &mapobj)
+				if nil != e {
+					log.Print(e.Error())
+				}
+				obj, e := utils.UnmarshalJson2StructGen(typ, mapobj)
+				if nil != e {
 					log.Print(e.Error())
 				}
 				// for k,_ := range mapobj{
 				// 	value := reflect.ValueOf(obj)
 				// }
-				log.Print(obj)
-				rets = append(rets,obj)
-				log.Print(string(data))
+				rets = append(rets, obj)
 			}
-			return rets,id,nil
+			return rets, id, nil
 		}
-	}else{
-		return nil,nil,errors.New(ERROR_PTR)
+	} else {
+		return nil, nil, errors.New(ERROR_PTR)
 	}
 }
 
-func (p *ElkEngine)Update(index string,types string,id string,data map[string]interface{}) error {
+func (p *ElkEngine) Update(index string, types string, id string, data map[string]interface{}) error {
 	if nil != p {
 		_, err := p.cli.Update().
 			Index(index).
@@ -126,7 +124,8 @@ func (p *ElkEngine)Update(index string,types string,id string,data map[string]in
 	}
 	return errors.New(ERROR_PTR)
 }
-func (p *ElkEngine)CreateIndex(index string,typemaping string)  error{
+
+func (p *ElkEngine) CreateIndex(index string, typemaping string) error {
 	if nil != p {
 		exists, err := p.cli.IndexExists(index).Do(context.Background())
 		if err != nil {
@@ -134,7 +133,7 @@ func (p *ElkEngine)CreateIndex(index string,typemaping string)  error{
 			log.Print(err)
 			return err
 		}
-		if exists{
+		if exists {
 			return errors.New(INDEX_EXISTED)
 		}
 		createIndex, err := p.cli.CreateIndex(index).Body(typemaping).Do(context.Background())
@@ -146,24 +145,23 @@ func (p *ElkEngine)CreateIndex(index string,typemaping string)  error{
 			return errors.New("create index error")
 			// Not acknowledged
 		}
-		return  nil
+		return nil
 	}
 	return errors.New(ERROR_PTR)
 }
 
-func (p *ElkEngine)IndexExisted(index string)  (bool,error ){
+func (p *ElkEngine) IndexExisted(index string) (bool, error) {
 	if nil != p {
 		exists, err := p.cli.IndexExists(index).Do(context.Background())
-		if exists{
-			return true,nil
+		if exists {
+			return true, nil
 		}
 		if err != nil {
 			// Handle error
 			log.Print(err)
-			return false,err
+			return false, err
 		}
-		return false,nil
-
+		return false, nil
 	}
-	return false,nil
-}
\ No newline at end of file
+	return false, nil
+}
diff --git a/test/portData_test.go b/test/portData_test.go
index 4557260..cde8562 100644
--- a/test/portData_test.go
+++ b/test/portData_test.go
@@ -55,22 +55,21 @@ func TestPortDocToElastic(t *testing.T) {
 	}
 }
 
-
-func TestReflect(t *testing.T){
-	type XX struct{
-		A int16 `json:"bb"`
+func TestReflect(t *testing.T) {
+	type XX struct {
+		A int16  `json:"bb"`
 		B string `json: "cc" xml:"test"`
 	}
-	unmar := map[string] interface{}{
-		"bb" : 2,
+	unmar := map[string]interface{}{
+		"bb": 2,
 		"cc": "hello",
 	}
 	xx := XX{}
-	utils.UnmarshalJson(&xx,unmar)
+	utils.UnmarshalJson2Struct(&xx, unmar)
 	log.Print(xx)
 }
 
-func TestQueryDoc(t *testing.T){
+func TestQueryDoc(t *testing.T) {
 	InitConfig()
 	InitLogs()
 	InitRedisConfig()
@@ -78,11 +77,18 @@ func TestQueryDoc(t *testing.T){
 	db.InitELK()
 
 	query := elastic.NewTermQuery("content", "title")
-	//_ = elastic.NewQueryStringQuery(fieldValue) //关键字查询
-	searchResult,titles,e := db.GetElastic().Query("doc",query,reflect.TypeOf(model.Doc{}),10,0)
-	if nil != e{
+	searchResult, titles, e := db.GetElastic().Query("doc", query, reflect.TypeOf(model.Doc{}), 10, 0)
+	if nil != e {
 		log.Print(e.Error())
 	}
 	log.Print(searchResult)
 	log.Print(titles)
-}
\ No newline at end of file
+}
+
+func TestChangeStructFieldThroughStruct(t *testing.T) {
+	type XX struct {
+		A int16  `json:"bb"`
+		B string `json: "cc" xml:"test"`
+	}
+
+}
diff --git a/utils/reflect.go b/utils/reflect.go
index 847e884..d7f7d2d 100644
--- a/utils/reflect.go
+++ b/utils/reflect.go
@@ -4,153 +4,162 @@ import (
 	"log"
 	"reflect"
 	"strings"
+
+	"github.com/pkg/errors"
 )
 
+const (
+	ErrorTypeError = "error input interface type error"
+	TagNoExisted   = "error remap tag no existed"
+)
 
-func ReflectMakeNew(t reflect.Type) interface{} {
+func reflectMakeNew(t reflect.Type) interface{} {
 	retptr := reflect.New(t)
 	sval := retptr.Elem().Interface()
 	return sval
 }
 
-type  TagMap map[string] string
+type TagMap map[string]string
 
-func ReflectTagMap(t reflect.Type)   map[string]  TagMap{
-	log.Print(t.Name())
-	ret := make(map[string]  TagMap)
+func ReflectTagMap(t reflect.Type) map[string]TagMap {
+	// log.Print(t.Kind(), " and ", t.Name())
+	if t.Kind() != reflect.Struct {
+		return nil
+	}
+	ret := make(map[string]TagMap)
 	num := t.NumField()
-	for i := 0;i < num;i++{
-		sub := strings.Split(string(t.Field(i).Tag),"\"")
-		for k,v := range(sub){
-			if len(v) > 0{
-				if k%2 == 0{
-					v = strings.Trim(v," ")
+	for i := 0; i < num; i++ {
+		sub := strings.Split(string(t.Field(i).Tag), "\"")
+		for k, v := range sub {
+			if len(v) > 0 {
+				if k%2 == 0 {
+					v = strings.Trim(v, " ")
 				}
-				if v[len(v) - 1] == ':'{
-					if _,ok := ret[v[:len(v) - 1]];ok{
-						if  ((k + 1) < len(sub) - 1) && ((sub[k + 1][len(sub[k + 1]) - 1] ) == ':'){ 	
-							continue; 
-						}else{
-							ret[v[:len(v) - 1]][sub[k + 1]] = string(t.Field(i).Name)
+				if v[len(v)-1] == ':' {
+					if _, ok := ret[v[:len(v)-1]]; ok {
+						if ((k + 1) < len(sub)-1) && ((sub[k+1][len(sub[k+1])-1]) == ':') {
+							continue
+						} else {
+							ret[v[:len(v)-1]][sub[k+1]] = string(t.Field(i).Name)
 						}
-					}else{
-						ret[v[:len(v) - 1]] = make(TagMap)
+					} else {
+						ret[v[:len(v)-1]] = make(TagMap)
 						log.Print()
-						if  ((k + 1) < len(sub) - 1) && ((sub[k + 1][len(sub[k + 1]) - 1] ) == ':'){ 	
-							continue; 
-						}else{
-							ret[v[:len(v) - 1]][sub[k + 1]] = string(t.Field(i).Name)
+						if ((k + 1) < len(sub)-1) && ((sub[k+1][len(sub[k+1])-1]) == ':') {
+							continue
+						} else {
+							ret[v[:len(v)-1]][sub[k+1]] = string(t.Field(i).Name)
 						}
 					}
-				}else{
+				} else {
 					continue
 				}
 			}
-			
+
 		}
 	}
 	return ret
 }
 
-func SameKind(typ1 reflect.Kind,typ2 reflect.Kind) bool{
-	switch typ1{
+func SameKind(typ1 reflect.Kind, typ2 reflect.Kind) bool {
+	switch typ1 {
 	case reflect.Int:
-		if(typ2 == reflect.Int ||typ2 == reflect.Int16 ||typ2 == reflect.Int32 ||typ2 == reflect.Int64||typ2 == reflect.Int8){
+		if typ2 == reflect.Int || typ2 == reflect.Int16 || typ2 == reflect.Int32 || typ2 == reflect.Int64 || typ2 == reflect.Int8 {
 			return true
 		}
-		if(typ2 == reflect.Uint ||typ2 == reflect.Uint16 ||typ2 == reflect.Uint32 ||typ2 == reflect.Uint64||typ2 == reflect.Uint8){
+		if typ2 == reflect.Uint || typ2 == reflect.Uint16 || typ2 == reflect.Uint32 || typ2 == reflect.Uint64 || typ2 == reflect.Uint8 {
 			return true
 		}
 	case reflect.Int8:
-		if(typ2 == reflect.Int ||typ2 == reflect.Int16 ||typ2 == reflect.Int32 ||typ2 == reflect.Int64||typ2 == reflect.Int8){
+		if typ2 == reflect.Int || typ2 == reflect.Int16 || typ2 == reflect.Int32 || typ2 == reflect.Int64 || typ2 == reflect.Int8 {
 			return true
 		}
-		if(typ2 == reflect.Uint ||typ2 == reflect.Uint16 ||typ2 == reflect.Uint32 ||typ2 == reflect.Uint64||typ2 == reflect.Uint8){
+		if typ2 == reflect.Uint || typ2 == reflect.Uint16 || typ2 == reflect.Uint32 || typ2 == reflect.Uint64 || typ2 == reflect.Uint8 {
 			return true
-		}		
+		}
 	case reflect.Int16:
-		if(typ2 == reflect.Int ||typ2 == reflect.Int16 ||typ2 == reflect.Int32 ||typ2 == reflect.Int64||typ2 == reflect.Int8){
+		if typ2 == reflect.Int || typ2 == reflect.Int16 || typ2 == reflect.Int32 || typ2 == reflect.Int64 || typ2 == reflect.Int8 {
 			return true
 		}
-		if(typ2 == reflect.Uint ||typ2 == reflect.Uint16 ||typ2 == reflect.Uint32 ||typ2 == reflect.Uint64||typ2 == reflect.Uint8){
+		if typ2 == reflect.Uint || typ2 == reflect.Uint16 || typ2 == reflect.Uint32 || typ2 == reflect.Uint64 || typ2 == reflect.Uint8 {
 			return true
 		}
 	case reflect.Int32:
-		if(typ2 == reflect.Int ||typ2 == reflect.Int16 ||typ2 == reflect.Int32 ||typ2 == reflect.Int64||typ2 == reflect.Int8){
+		if typ2 == reflect.Int || typ2 == reflect.Int16 || typ2 == reflect.Int32 || typ2 == reflect.Int64 || typ2 == reflect.Int8 {
 			return true
 		}
-		if(typ2 == reflect.Uint ||typ2 == reflect.Uint16 ||typ2 == reflect.Uint32 ||typ2 == reflect.Uint64||typ2 == reflect.Uint8){
+		if typ2 == reflect.Uint || typ2 == reflect.Uint16 || typ2 == reflect.Uint32 || typ2 == reflect.Uint64 || typ2 == reflect.Uint8 {
 			return true
-		}		
+		}
 	case reflect.Uint:
-		if(typ2 == reflect.Int ||typ2 == reflect.Int16 ||typ2 == reflect.Int32 ||typ2 == reflect.Int64||typ2 == reflect.Int8){
+		if typ2 == reflect.Int || typ2 == reflect.Int16 || typ2 == reflect.Int32 || typ2 == reflect.Int64 || typ2 == reflect.Int8 {
 			return true
 		}
-		if(typ2 == reflect.Uint ||typ2 == reflect.Uint16 ||typ2 == reflect.Uint32 ||typ2 == reflect.Uint64||typ2 == reflect.Uint8){
+		if typ2 == reflect.Uint || typ2 == reflect.Uint16 || typ2 == reflect.Uint32 || typ2 == reflect.Uint64 || typ2 == reflect.Uint8 {
 			return true
 		}
 	case reflect.Uint8:
-		if(typ2 == reflect.Int ||typ2 == reflect.Int16 ||typ2 == reflect.Int32 ||typ2 == reflect.Int64||typ2 == reflect.Int8){
+		if typ2 == reflect.Int || typ2 == reflect.Int16 || typ2 == reflect.Int32 || typ2 == reflect.Int64 || typ2 == reflect.Int8 {
 			return true
 		}
-		if(typ2 == reflect.Uint ||typ2 == reflect.Uint16 ||typ2 == reflect.Uint32 ||typ2 == reflect.Uint64||typ2 == reflect.Uint8){
+		if typ2 == reflect.Uint || typ2 == reflect.Uint16 || typ2 == reflect.Uint32 || typ2 == reflect.Uint64 || typ2 == reflect.Uint8 {
 			return true
 		}
 	case reflect.Uint16:
-		if(typ2 == reflect.Int ||typ2 == reflect.Int16 ||typ2 == reflect.Int32 ||typ2 == reflect.Int64||typ2 == reflect.Int8){
+		if typ2 == reflect.Int || typ2 == reflect.Int16 || typ2 == reflect.Int32 || typ2 == reflect.Int64 || typ2 == reflect.Int8 {
 			return true
 		}
-		if(typ2 == reflect.Uint ||typ2 == reflect.Uint16 ||typ2 == reflect.Uint32 ||typ2 == reflect.Uint64||typ2 == reflect.Uint8){
+		if typ2 == reflect.Uint || typ2 == reflect.Uint16 || typ2 == reflect.Uint32 || typ2 == reflect.Uint64 || typ2 == reflect.Uint8 {
 			return true
-		}				
+		}
 	case reflect.Uint32:
-		if(typ2 == reflect.Int ||typ2 == reflect.Int16 ||typ2 == reflect.Int32 ||typ2 == reflect.Int64||typ2 == reflect.Int8){
+		if typ2 == reflect.Int || typ2 == reflect.Int16 || typ2 == reflect.Int32 || typ2 == reflect.Int64 || typ2 == reflect.Int8 {
 			return true
 		}
-		if(typ2 == reflect.Uint ||typ2 == reflect.Uint16 ||typ2 == reflect.Uint32 ||typ2 == reflect.Uint64||typ2 == reflect.Uint8){
+		if typ2 == reflect.Uint || typ2 == reflect.Uint16 || typ2 == reflect.Uint32 || typ2 == reflect.Uint64 || typ2 == reflect.Uint8 {
 			return true
 		}
 	case reflect.Uint64:
-		if(typ2 == reflect.Int ||typ2 == reflect.Int16 ||typ2 == reflect.Int32 ||typ2 == reflect.Int64||typ2 == reflect.Int8){
+		if typ2 == reflect.Int || typ2 == reflect.Int16 || typ2 == reflect.Int32 || typ2 == reflect.Int64 || typ2 == reflect.Int8 {
 			return true
 		}
-		if(typ2 == reflect.Uint ||typ2 == reflect.Uint16 ||typ2 == reflect.Uint32 ||typ2 == reflect.Uint64||typ2 == reflect.Uint8){
+		if typ2 == reflect.Uint || typ2 == reflect.Uint16 || typ2 == reflect.Uint32 || typ2 == reflect.Uint64 || typ2 == reflect.Uint8 {
 			return true
-		}	
+		}
 	case reflect.Float32:
-		if(typ2 == reflect.Float32 ||typ2 == reflect.Float64){
+		if typ2 == reflect.Float32 || typ2 == reflect.Float64 {
 			return true
 		}
 	case reflect.Float64:
-		if(typ2 == reflect.Float32 ||typ2 == reflect.Float64){
+		if typ2 == reflect.Float32 || typ2 == reflect.Float64 {
 			return true
 		}
 	default:
-		return (typ1 == typ2)		
+		return (typ1 == typ2)
 	}
 	return false
 }
 
-func UnmarshalWithTag(value interface{}, maps map[string]interface{},tag string){
-	if "" == tag{
+func UnmarshalWithTag(value interface{}, maps map[string]interface{}, tag string) {
+	if "" == tag {
 		return
 	}
 	valueof := reflect.ValueOf(value)
-	if !valueof.Elem().CanAddr(){
+	if !valueof.Elem().CanAddr() {
 		log.Print("should be addr")
 		return
 	}
 	remap := ReflectTagMap(valueof.Elem().Type())
-	_,ok := remap[tag]
-	if !ok{
-		return 
+	_, ok := remap[tag]
+	if !ok {
+		return
 	}
-	for k,v := range(maps){
+	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()){
+		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()))
 				}
 			}
@@ -158,29 +167,81 @@ func UnmarshalWithTag(value interface{}, maps map[string]interface{},tag string)
 	}
 }
 
-
-
-func UnmarshalJson(value interface{}, maps map[string]interface{}){
+/*
+	an generaly unmarshal function implement
+	accept only pointer to struct or pointer to interface contains struct
+*/
+func UnmarshalJson2Struct(value interface{}, maps map[string]interface{}) error {
+	log.Print("UnmarshalJson kind is ", reflect.ValueOf(value).Kind())
+	log.Print("UnmarshalJson kind1 is ", reflect.ValueOf(value).Elem().Kind())
+	// log.Print("UnmarshalJson kind2 is ", reflect.ValueOf(value).Elem().Elem().Kind())
 	valueof := reflect.ValueOf(value)
-	if !valueof.Elem().CanAddr(){
-		log.Print("should be addr")
-		return
+	var opStruct reflect.Value
+	if valueof.Kind() == reflect.Ptr {
+		// if it is ptr to interface,the interface must contains a struct type
+		if valueof.Elem().Kind() == reflect.Interface {
+			if valueof.Elem().Elem().Kind() == reflect.Struct {
+				opStruct = valueof.Elem().Elem()
+			} else {
+				return errors.New(ErrorTypeError)
+			}
+		} else if valueof.Elem().Kind() == reflect.Struct {
+			// simply it is ptr to struct
+			opStruct = valueof.Elem()
+		} else {
+			return errors.New(ErrorTypeError)
+		}
+	} else {
+		return errors.New(ErrorTypeError)
 	}
-	remap := ReflectTagMap(valueof.Elem().Type())
-	_,ok := remap["json"]
-	if !ok{
-		return 
+
+	remap := ReflectTagMap(opStruct.Type())
+	_, ok := remap["json"]
+	if !ok {
+		return errors.New(TagNoExisted)
 	}
-	for k,v := range(maps){
+	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()))
+		if filedName, ok := remap["json"][k]; ok {
+			log.Print(opStruct.FieldByName(filedName).Kind(), reflect.TypeOf(v).Kind().String())
+			if SameKind(opStruct.FieldByName(filedName).Kind(), reflect.TypeOf(v).Kind()) {
+				if opStruct.FieldByName(filedName).CanSet() {
+					opStruct.FieldByName(filedName).Set(reflect.ValueOf(v).Convert(opStruct.FieldByName(filedName).Type()))
 				}
 			}
 		}
 	}
+	return nil
 }
 
+/*
+	an generaly unmarshal function implement
+	accept only pointer to struct or pointer to interface contains struct
+*/
+func UnmarshalJson2StructGen(t reflect.Type, maps map[string]interface{}) (interface{}, error) {
+	if t.Kind() != reflect.Struct {
+		return nil, errors.New(ErrorTypeError)
+	}
+	remap := ReflectTagMap(t)
+	_, ok := remap["json"]
+	if !ok {
+		return nil, errors.New(TagNoExisted)
+	}
+	ret := reflect.New(t)
+	// log.Print(ret.Kind())
+	opStruct := ret.Elem()
+	// log.Print(opStruct.Kind())
+	for k, v := range maps {
+		log.Print(k)
+		if filedName, ok := remap["json"][k]; ok {
+			// log.Print(opStruct.FieldByName(filedName).Kind(), reflect.TypeOf(v).Kind().String())
+			if SameKind(opStruct.FieldByName(filedName).Kind(), reflect.TypeOf(v).Kind()) {
+				// log.Print(opStruct.FieldByName(filedName).CanAddr(), opStruct.FieldByName(filedName).CanSet())
+				if opStruct.FieldByName(filedName).CanSet() {
+					opStruct.FieldByName(filedName).Set(reflect.ValueOf(v).Convert(opStruct.FieldByName(filedName).Type()))
+				}
+			}
+		}
+	}
+	return ret.Elem().Interface(), nil
+}