diff --git a/nmapper/const.go b/nmapper/const.go
index 2c86d4b..e49ac1b 100644
--- a/nmapper/const.go
+++ b/nmapper/const.go
@@ -1,6 +1,9 @@
 package nmapper
 
+import "git.noahlan.cn/noahlan/ntool/ndef"
+
 const (
-	mapperTagKey = "mapper"
-	jsonTagKey   = "json"
+	mapperTagKey     = "mapper"
+	jsonTagKey       = "json"
+	flattenSeparator = ndef.DotStr
 )
diff --git a/nmapper/mapper.go b/nmapper/mapper.go
index e424af7..08fca4a 100644
--- a/nmapper/mapper.go
+++ b/nmapper/mapper.go
@@ -46,17 +46,17 @@ func WithTypeWrapper(wrappers ...wrapper.TypeWrapper) Option {
 	}
 }
 
-func Mapper(dst any, src any) error {
-	return defaultMapper.Mapper(dst, src)
-}
-
-func ParseMap(dst any, src map[string]any) error {
-	return defaultMapper.ParseMap(dst, src)
-}
-
-func ParseStrMap(dst any, src map[string]string) error {
-	defaultMapper.SetTypeWrapper(wrapper.StrWrapper()...)
-	defer defaultMapper.SetTypeWrapper()
-
-	return defaultMapper.ParseStrMap(dst, src)
-}
+//func Mapper(dst any, src any) error {
+//	return defaultMapper.Mapper(dst, src)
+//}
+//
+//func ParseMap(dst any, src map[string]any) error {
+//	return defaultMapper.Parse(dst, src)
+//}
+//
+//func ParseStrMap(dst any, src map[string]string) error {
+//	defaultMapper.SetTypeWrapper(wrapper.StrWrapper()...)
+//	defer defaultMapper.SetTypeWrapper()
+//
+//	return defaultMapper.Parse(dst, src)
+//}
diff --git a/nmapper/mapper_object.go b/nmapper/mapper_object.go
index c97c294..d09fec0 100644
--- a/nmapper/mapper_object.go
+++ b/nmapper/mapper_object.go
@@ -2,6 +2,7 @@ package nmapper
 
 import (
 	"errors"
+	"fmt"
 	"git.noahlan.cn/noahlan/ntool/internal/convert"
 	"git.noahlan.cn/noahlan/ntool/nmap"
 	"git.noahlan.cn/noahlan/ntool/nmapper/wrapper"
@@ -10,18 +11,36 @@ import (
 	"git.noahlan.cn/noahlan/ntool/nstr"
 	"git.noahlan.cn/noahlan/ntool/nstruct"
 	"reflect"
+	"strings"
+	"sync"
 	"time"
 )
 
-type MapperObject struct {
-	ZeroValue reflect.Value
+type (
+	field struct {
+		name      string // 原始名
+		tagName   string
+		index     []int     // 索引列表，层级
+		tagMap    nmap.SMap // tag Map
+		omitEmpty bool      // 空值忽略
+		typ       reflect.Type
+	}
+
+	structFields struct {
+		list      []field
+		nameIndex map[string]int
+	}
 
-	typeWrappers        []wrapper.TypeWrapper
-	timeType            reflect.Type // 时间类型
-	enabledTypeChecking bool         // 是否开启类型检查
+	MapperObject struct {
+		ZeroValue reflect.Value
 
-	customTagName string // 自定义Tag名称
-}
+		typeWrappers        []wrapper.TypeWrapper
+		timeType            reflect.Type // 时间类型
+		enabledTypeChecking bool         // 是否开启类型检查
+
+		customTagName string // 自定义Tag名称
+	}
+)
 
 func NewMapper(opts ...Option) *MapperObject {
 	tmp := &MapperObject{
@@ -47,7 +66,7 @@ func (m *MapperObject) RegisterTypeWrapper(wrappers ...wrapper.TypeWrapper) {
 	m.typeWrappers = append(m.typeWrappers, wrappers...)
 }
 
-// MapperObject 将src转换为dst
+// Mapper 将src转换为dst
 // src为struct类型, dst为map类型 map[string]any 或者 map[string]string
 func (m *MapperObject) Mapper(dst any, src any) error {
 	srcElem := reflect.ValueOf(src)
@@ -59,83 +78,334 @@ func (m *MapperObject) Mapper(dst any, src any) error {
 	if srcElem == m.ZeroValue {
 		return errors.New("src is not legal value")
 	}
+	if srcElem.Kind() != reflect.Struct {
+		return errors.New("src must be struct")
+	}
+
 	if dstElem == m.ZeroValue {
 		return errors.New("dst is not legal value")
 	}
-	return m.elemMapper(dstElem, srcElem)
+	if dstElem.Type().Kind() != reflect.Map {
+		return errors.New("dst is not map")
+	}
+	flatten := dstElem.Type().Elem().Kind() == reflect.String
+	if flatten {
+		m.SetTypeWrapper(wrapper.StrWrapper()...)
+		defer func() {
+			m.SetTypeWrapper()
+		}()
+	}
+	m.elemToMap(dstElem, srcElem, "", flatten)
+	return nil
 }
 
-func (m *MapperObject) elemMapper(dstElem, srcElem reflect.Value) error {
-	//if dstElem.Type().Kind() != reflect.Map {
-	//	return errors.New(fmt.Sprintf("dst is not legal value, need map but got %s", dstElem.Type().Kind().String()))
-	//}
-	if dstElem.Type().Kind() == reflect.Map {
-		m.elemToMap(dstElem, srcElem)
+func isEmptyValue(v reflect.Value) bool {
+	switch v.Kind() {
+	case reflect.Array, reflect.Map, reflect.Slice, reflect.String:
+		return v.Len() == 0
+	case reflect.Bool:
+		return !v.Bool()
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		return v.Int() == 0
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
+		return v.Uint() == 0
+	case reflect.Float32, reflect.Float64:
+		return v.Float() == 0
+	case reflect.Interface, reflect.Pointer:
+		return v.IsNil()
 	}
-
-	return nil
+	return false
 }
 
-func (m *MapperObject) elemToMap(dstElem, srcElem reflect.Value) {
-	for i := 0; i < srcElem.NumField(); i++ {
-		srcFieldInfo := srcElem.Field(i)
-		// tag
-		name, tagMap := m.getFieldNameAndMap(srcElem, i)
-		if name == "" {
+func (m *MapperObject) elemToMap(dstElem, srcElem reflect.Value, preKey string, flatten bool) {
+	fields := cachedTypeFields(srcElem.Type(), m.customTagName)
+FieldLoop:
+	for i := range fields.list {
+		f := &fields.list[i]
+
+		fv := srcElem
+		for _, i := range f.index {
+			if fv.Kind() == reflect.Ptr {
+				if fv.IsNil() {
+					continue FieldLoop
+				}
+				fv = fv.Elem()
+			}
+			fv = fv.Field(i)
+		}
+		if f.omitEmpty && isEmptyValue(fv) {
 			continue
 		}
-
-		valElem := srcFieldInfo
-		for _, w := range m.typeWrappers {
-			if w.Supported(srcFieldInfo) {
-				valElem = w.Wrap(srcFieldInfo, i, tagMap)
-				break
+		fv = nreflect.IndirectAddr(fv)
+		if fv.Kind() == reflect.Struct && fv.Type().Name() != "Time" {
+			if flatten {
+				m.elemToMap(dstElem, fv, f.tagName, flatten)
+			} else {
+				tmpMapV := reflect.ValueOf(make(map[string]any))
+				dstElem.SetMapIndex(reflect.ValueOf(f.tagName), tmpMapV)
+				m.elemToMap(tmpMapV, fv, f.tagName, flatten)
 			}
+		} else {
+			wrappedFv := fv
+			for _, w := range m.typeWrappers {
+				if w.Supported(wrappedFv) {
+					wrappedFv = w.Wrap(wrappedFv, i, f.tagMap)
+					break
+				}
+			}
+			key := reflect.ValueOf(f.tagName)
+			if flatten && preKey != "" {
+				key = reflect.ValueOf(preKey + flattenSeparator + f.tagName)
+			}
+			dstElem.SetMapIndex(key, wrappedFv)
 		}
-		dstElem.SetMapIndex(reflect.ValueOf(name), valElem)
 	}
 }
 
-func (m *MapperObject) ParseMap(dst any, src map[string]any) error {
+func (m *MapperObject) Parse(dst any, src any, flatten bool) error {
+	srcElem := reflect.ValueOf(src)
+	if srcElem.Type().Kind() != reflect.Map {
+		return errors.New("src is not legal value, must be map[string]any or map[string]string")
+	}
+	//flatten := srcElem.Type().Elem().Kind() == reflect.String
+	if flatten {
+		m.SetTypeWrapper(wrapper.StrWrapper()...)
+		defer func() {
+			m.SetTypeWrapper()
+		}()
+	}
+
 	dstElem := reflect.ValueOf(dst)
-	dstElem = nreflect.Indirect(dstElem)
+	if dstElem.Kind() != reflect.Pointer || dstElem.IsNil() {
+		return errors.New("non-pointer dst")
+	}
 
-	if dstElem == m.ZeroValue {
-		return errors.New("dst is not legal value")
+	return m.parseInner(dstElem, srcElem, flatten)
+}
+
+func (m *MapperObject) parseInner(v reflect.Value, srcElem reflect.Value, flatten bool) error {
+	pv := nreflect.IndirectAddr(v)
+
+	v = pv
+	t := v.Type()
+
+	// Decoding into nil interface? Switch to non-reflect code.
+	if v.Kind() == reflect.Interface && v.NumMethod() == 0 {
+		v.Set(srcElem)
+		return nil
+	}
+	var fields structFields
+	// Check type of target:
+	//   struct or
+	//   map[T1]T2 where T1 is string
+	switch v.Kind() {
+	case reflect.Map:
+		// Map key must either have string kind
+		switch t.Key().Kind() {
+		case reflect.String:
+		default:
+			//return errors.New("the type of key must be string")
+			return nil
+		}
+		if v.IsNil() {
+			v.Set(reflect.MakeMap(t))
+		}
+	case reflect.Struct:
+		fields = cachedTypeFields(t, m.customTagName)
+	// ok
+	default:
+		return errors.New("type of dst must be map[string]xx or struct")
 	}
 
-	for i := 0; i < dstElem.NumField(); i++ {
-		dstFieldInfo := dstElem.Field(i)
-		name, tagMap := m.getFieldNameAndMap(dstElem, i)
-		if name == "" {
+	var mapElem reflect.Value
+	mapIter := srcElem.MapRange()
+	for mapIter.Next() {
+		mapKey, mapValue := mapIter.Key(), mapIter.Value()
+		if !mapValue.IsValid() || mapValue.IsZero() {
 			continue
 		}
-		m.setFieldValue(dstFieldInfo, tagMap, src[name])
-	}
-	return nil
-}
+		// key
+		key := mapKey.String()
 
-func (m *MapperObject) ParseStrMap(dst any, src map[string]string) error {
-	dstElem := reflect.ValueOf(dst)
-	dstElem = nreflect.Indirect(dstElem)
+		// Figure out field corresponding to key.
+		var (
+			subv   reflect.Value
+			tagMap nmap.SMap
+		)
+		if v.Kind() == reflect.Map {
+			elemType := t.Elem()
+			if !mapElem.IsValid() {
+				mapElem = reflect.New(elemType).Elem()
+			} else {
+				mapElem.Set(reflect.Zero(elemType))
+			}
+			subv = mapElem
+		} else {
+			var f *field
+			// 对于key中包含分隔符
+			if strings.Contains(mapKey.String(), flattenSeparator) {
+				keys := nstr.Split(mapKey.String(), flattenSeparator)
+				keyLen := len(keys)
+				var tmpFields = fields
+				for i := 0; i < keyLen; i++ {
+					k := keys[i]
+					var tmpF *field
+					if i, ok := tmpFields.nameIndex[k]; ok {
+						// Found an exact name match.
+						tmpF = &tmpFields.list[i]
+					} else {
+						// Fall back to the expensive case-insensitive
+						// linear search.
+						for i := range tmpFields.list {
+							ff := &tmpFields.list[i]
+							if ff.tagName == k {
+								tmpF = ff
+								break
+							}
+						}
+					}
+					if tmpF != nil {
+						f = tmpF
+						if f.typ.Kind() == reflect.Struct {
+							if i < keyLen-1 {
+								if flatten {
+									// 扁平化模式下，需要将subv指定为倒数第二个key所指向的struct
+									subv = m.findRValueByField(subv, v, f)
+								}
+								if f.typ.Kind() == reflect.Struct {
+									tmpFields = cachedTypeFields(f.typ, m.customTagName)
+								}
+							}
+						}
+					} else {
+						// 当未能发现对应key的指向时，需判断上层是否为map，所为map则需要构建
+						if f != nil && f.typ.Kind() == reflect.Map {
+							// 此时的f为上层field
+							if subv.Kind() != reflect.Map {
+								subv = m.findRValueByField(subv, v, f)
+							}
+							if subv.Kind() == reflect.Map {
+								if subv.IsNil() {
+									subv.Set(reflect.MakeMap(f.typ))
+								}
+								if i < keyLen-1 {
+									subvTElem := subv.Type().Elem()
+									if subvTElem.Kind() == reflect.Interface || subvTElem.Kind() == reflect.Map {
+										tmpMap := reflect.MakeMap(f.typ)
+										subv.SetMapIndex(reflect.ValueOf(k), tmpMap)
+										subv = tmpMap
+									}
+								}
+								if i == keyLen-1 {
+									mapKey = reflect.ValueOf(k)
+								}
+							}
+						}
+						if i == keyLen-1 {
+							f = nil
+						}
+					}
+				}
+			} else {
+				if i, ok := fields.nameIndex[key]; ok {
+					// Found an exact name match.
+					f = &fields.list[i]
+				} else {
+					// Fall back to the expensive case-insensitive
+					// linear search.
+					for i := range fields.list {
+						ff := &fields.list[i]
+						if ff.tagName == key {
+							f = ff
+							break
+						}
+					}
+				}
+			}
 
-	if dstElem == m.ZeroValue {
-		return errors.New("dst is not legal value")
-	}
+			if f != nil {
+				tagMap = f.tagMap
+				subv = m.findRValueByField(subv, v, f)
+			}
+		}
 
-	for i := 0; i < dstElem.NumField(); i++ {
-		dstFieldInfo := dstElem.Field(i)
-		name, tagMap := m.getFieldNameAndMap(dstElem, i)
-		if name == "" {
+		if !subv.IsValid() {
 			continue
 		}
-		m.setFieldValue(dstFieldInfo, tagMap, src[name])
+		subv = nreflect.IndirectAddr(subv)
+
+		switch subv.Kind() {
+		case reflect.Map:
+			if subv.IsNil() {
+				subv.Set(reflect.MakeMap(subv.Type()))
+			}
+			if mapValue.Kind() == reflect.Interface && mapValue.Elem().Kind() == reflect.Map {
+				subv.Set(mapValue.Elem())
+			} else {
+				subv.SetMapIndex(mapKey, mapValue)
+			}
+		case reflect.Struct:
+			// 递归，将mapValue作为本次的src进行传递
+			if mapValue.Kind() == reflect.Interface && mapValue.Elem().Kind() == reflect.Map {
+				if err := m.parseInner(subv, reflect.ValueOf(mapValue.Interface()), false); err != nil {
+					return err
+				}
+			} else {
+				m.setFieldValue(subv, tagMap, mapValue.Interface())
+			}
+		default:
+			// 普通属性，直接设置值
+			m.setFieldValue(subv, tagMap, mapValue.Interface())
+		}
+
+		// 递归回溯后
+		// Write value back to map;
+		// if using struct, subv points into struct already.
+		if v.Kind() == reflect.Map {
+			kt := t.Key()
+			var kv reflect.Value
+			switch {
+			case kt.Kind() == reflect.String:
+				kv = reflect.ValueOf(key).Convert(kt)
+			default:
+				return fmt.Errorf("unexpected key type")
+			}
+			if kv.IsValid() {
+				v.SetMapIndex(kv, subv)
+			}
+		}
 	}
 	return nil
 }
 
+func (m *MapperObject) findRValueByField(subv reflect.Value, topv reflect.Value, f *field) reflect.Value {
+	if !subv.IsValid() {
+		subv = topv
+	}
+	for _, i := range f.index {
+		if subv.Kind() == reflect.Ptr {
+			if subv.IsNil() {
+				// If a struct embeds a pointer to an unexported type,
+				// it is not possible to set a newly allocated value
+				// since the field is unexported.
+				//
+				// See https://golang.org/issue/21357
+				if !subv.CanSet() {
+					//return fmt.Errorf("cannot set embedded pointer to unexported struct: %v", subv.Type().Elem())
+					break
+				}
+				subv.Set(reflect.New(subv.Type().Elem()))
+			}
+			subv = subv.Elem()
+		}
+		subv = subv.Field(i)
+	}
+	return subv
+}
+
 func (m *MapperObject) setFieldValue(fieldElem reflect.Value, tagMap nmap.SMap, value any) {
 	fieldKind := fieldElem.Type().Kind()
+	//v := nreflect.IndirectAddr(fieldElem)
 
 	switch fieldKind {
 	case reflect.Bool:
@@ -222,10 +492,9 @@ func (m *MapperObject) setFieldValue(fieldElem reflect.Value, tagMap nmap.SMap,
 }
 
 // getFieldNameAndMap 获取字段名称和tagMap
-func (m *MapperObject) getFieldNameAndMap(objElem reflect.Value, index int) (string, nmap.SMap) {
-	field := objElem.Type().Field(index)
+func getFieldNameAndMap(field reflect.StructField, customTagName string) (string, nmap.SMap) {
 	// 1. custom
-	tagVal, ok := field.Tag.Lookup(m.customTagName)
+	tagVal, ok := field.Tag.Lookup(customTagName)
 	if ok && tagVal != "" {
 		sMap, _ := nstruct.ParseTagValueDefault(field.Name, tagVal)
 		name := sMap.Get("name")
@@ -263,3 +532,153 @@ func (m *MapperObject) getFieldNameAndMap(objElem reflect.Value, index int) (str
 	}
 	return field.Name, nmap.SMap{"name": field.Name}
 }
+
+var fieldCache sync.Map
+
+func cachedTypeFields(t reflect.Type, customTagName string) structFields {
+	if f, ok := fieldCache.Load(t); ok {
+		return f.(structFields)
+	}
+	f, _ := fieldCache.LoadOrStore(t, typeFields(t, customTagName))
+	return f.(structFields)
+}
+
+// typeFields returns a list of fields that JSON should recognize for the given type.
+// The algorithm is breadth-first search over the set of structs to include - the top struct
+// and then any reachable anonymous structs.
+func typeFields(t reflect.Type, customTagName string) structFields {
+	// Anonymous fields to explore at the current level and the next.
+	var current []field
+	next := []field{{typ: t}}
+
+	// Count of queued names for current level and the next.
+	var count, nextCount map[reflect.Type]int
+
+	// Types already visited at an earlier level.
+	visited := map[reflect.Type]bool{}
+
+	// Fields found.
+	var fields []field
+
+	for len(next) > 0 {
+		current, next = next, current[:0]
+		count, nextCount = nextCount, map[reflect.Type]int{}
+
+		for _, f := range current {
+			if visited[f.typ] {
+				continue
+			}
+			visited[f.typ] = true
+
+			// Scan f.typ for fields to include.
+			for i := 0; i < f.typ.NumField(); i++ {
+				sf := f.typ.Field(i)
+				if sf.Anonymous {
+					t := sf.Type
+					if t.Kind() == reflect.Pointer {
+						t = t.Elem()
+					}
+					if !sf.IsExported() && t.Kind() != reflect.Struct {
+						// Ignore embedded fields of unexported non-struct types.
+						continue
+					}
+					// Do not ignore embedded fields of unexported struct types
+					// since they may have exported fields.
+				} else if !sf.IsExported() {
+					// Ignore unexported non-embedded fields.
+					continue
+				}
+				name, tagMap := getFieldNameAndMap(sf, customTagName)
+				if name == "" {
+					continue
+				}
+				index := make([]int, len(f.index)+1)
+				copy(index, f.index)
+				index[len(f.index)] = i
+
+				ft := sf.Type
+				if ft.Name() == "" && ft.Kind() == reflect.Pointer {
+					// Follow pointer.
+					ft = ft.Elem()
+				}
+
+				// Record found field and index sequence.
+				if !sf.Anonymous || ft.Kind() != reflect.Struct {
+					fields = append(fields, field{
+						name:      sf.Name,
+						tagName:   name,
+						index:     index,
+						tagMap:    tagMap,
+						omitEmpty: tagMap.Has("omitempty"),
+						typ:       ft,
+					})
+					if count[f.typ] > 1 {
+						// If there were multiple instances, add a second,
+						// so that the annihilation code will see a duplicate.
+						// It only cares about the distinction between 1 or 2,
+						// so don't bother generating any more copies.
+						fields = append(fields, fields[len(fields)-1])
+					}
+					continue
+				}
+				// Record new anonymous struct to explore in next round.
+				nextCount[ft]++
+				if nextCount[ft] == 1 {
+					next = append(next, field{name: ft.Name(), index: index, typ: ft})
+				}
+			}
+		}
+	}
+	// Delete all fields that are hidden by the Go rules for embedded fields,
+	// except that fields with JSON tags are promoted.
+
+	// The fields are sorted in primary order of name, secondary order
+	// of field index length. Loop over names; for each name, delete
+	// hidden fields by choosing the one dominant field that survives.
+	out := fields[:0]
+	for advance, i := 0, 0; i < len(fields); i += advance {
+		// One iteration per name.
+		// Find the sequence of fields with the name of this first field.
+		fi := fields[i]
+		name := fi.name
+		for advance = 1; i+advance < len(fields); advance++ {
+			fj := fields[i+advance]
+			if fj.name != name {
+				break
+			}
+		}
+		if advance == 1 { // Only one field with this name
+			out = append(out, fi)
+			continue
+		}
+		dominant, ok := dominantField(fields[i : i+advance])
+		if ok {
+			out = append(out, dominant)
+		}
+	}
+
+	fields = out
+
+	nameIndex := make(map[string]int, len(fields))
+	for i, field := range fields {
+		nameIndex[field.tagName] = i
+	}
+
+	return structFields{fields, nameIndex}
+}
+
+// dominantField looks through the fields, all of which are known to
+// have the same name, to find the single field that dominates the
+// others using Go's embedding rules, modified by the presence of
+// JSON tags. If there are multiple top-level fields, the boolean
+// will be false: This condition is an error in Go and we skip all
+// the fields.
+func dominantField(fields []field) (field, bool) {
+	// The fields are sorted in increasing index-length order, then by presence of tag.
+	// That means that the first field is the dominant one. We need only check
+	// for error cases: two fields at top level, either both tagged or neither tagged.
+	if len(fields) > 1 && len(fields[0].index) == len(fields[1].index) {
+		return field{}, false
+	}
+	return fields[0], true
+}
diff --git a/nmapper/mapper_object_test.go b/nmapper/mapper_object_test.go
index 026b15c..3fcf49f 100644
--- a/nmapper/mapper_object_test.go
+++ b/nmapper/mapper_object_test.go
@@ -4,10 +4,16 @@ import (
 	"fmt"
 	"git.noahlan.cn/noahlan/ntool/nmapper"
 	"git.noahlan.cn/noahlan/ntool/nmapper/wrapper"
+	"git.noahlan.cn/noahlan/ntool/nreflect"
+	"reflect"
 	"testing"
 	"time"
 )
 
+type testInnerType struct {
+	InInt int `json:"in_int"`
+}
+
 type testType struct {
 	Int          int       `json:"int"`
 	Int8         int8      `json:"int8"`
@@ -18,6 +24,50 @@ type testType struct {
 	Time         time.Time `json:"time,layout=2006-01-02"`
 	TimeNoLayout time.Time `json:"time_no_layout"`
 	Ignore       int       `json:"-"`
+	*testInnerType
+	TT *testInnerType `json:"tt"`
+	t  *testInnerType `json:"t"`
+}
+
+func TestT(t *testing.T) {
+	src := &testType{
+		Int:           1,
+		Int8:          2,
+		UInt8:         3,
+		Float32:       4.2,
+		Float64:       5.2222222222,
+		String:        "test",
+		Time:          time.Now(),
+		TimeNoLayout:  time.Now().Add(time.Hour * 24),
+		Ignore:        99,
+		testInnerType: &testInnerType{InInt: 111},
+		TT:            &testInnerType{InInt: 222},
+		t:             &testInnerType{InInt: 333},
+	}
+
+	valElem := reflect.ValueOf(src)
+	valElem = nreflect.Indirect(valElem)
+
+	typElem := reflect.TypeOf(src)
+	typElem = typElem.Elem()
+
+	for i := 0; i < valElem.NumField(); i++ {
+		fieldValElem := valElem.Field(i)
+		fieldTypElem := typElem.Field(i)
+
+		fieldElem := fieldValElem.Type()
+		fmt.Println(fieldElem.Name(), fieldTypElem.Anonymous, fieldTypElem.Name)
+		fmt.Println(fieldElem.Kind(), fieldTypElem.Type)
+		fmt.Println(fieldElem.String(), fieldTypElem.IsExported())
+		fmt.Println()
+
+		//if fieldElem.Kind() == reflect.Ptr {
+		//	fff := fieldElem.Elem()
+		//	fmt.Println(fff.Name())
+		//	fmt.Println(fff.Kind())
+		//	fmt.Println(fff.String())
+		//}
+	}
 }
 
 func TestMapper_Mapper(t *testing.T) {
@@ -25,22 +75,22 @@ func TestMapper_Mapper(t *testing.T) {
 
 	dest := make(map[string]any)
 	src := &testType{
-		Int:          1,
-		Int8:         2,
-		UInt8:        3,
-		Float32:      4.2,
-		Float64:      5.2222222222,
-		String:       "test",
-		Time:         time.Now(),
-		TimeNoLayout: time.Now().Add(time.Hour * 24),
-		Ignore:       99,
+		Int:           1,
+		Int8:          2,
+		UInt8:         3,
+		Float32:       4.2,
+		Float64:       5.2222222222,
+		String:        "test",
+		Time:          time.Now(),
+		TimeNoLayout:  time.Now().Add(time.Hour * 24),
+		Ignore:        99,
+		testInnerType: &testInnerType{InInt: 111},
+		TT:            &testInnerType{InInt: 222},
 	}
 	_ = mapper.Mapper(dest, src)
 
 	dest2 := make(map[string]string)
-	mapper.SetTypeWrapper(wrapper.StrWrapper()...)
 	_ = mapper.Mapper(dest2, src)
-	mapper.SetTypeWrapper()
 
 	fmt.Printf("dest1:\n%+v\n", dest)
 	fmt.Printf("dest2:\n%+v\n", dest2)
@@ -61,7 +111,7 @@ func TestMapper_Parse(t *testing.T) {
 	var dest testType
 
 	mapper := nmapper.NewMapper()
-	_ = mapper.ParseMap(&dest, src)
+	_ = mapper.Parse(&dest, src, false)
 
 	fmt.Printf("%+v\n", dest)
 }
@@ -74,16 +124,85 @@ func TestMapperObject_ParseStrMap(t *testing.T) {
 	src["float32"] = "4.2"
 	src["float64"] = "5.2222222222"
 	src["string"] = "test"
-	src["time"] = "2023-08-18 10:07:40"
+	src["time"] = "2023-08-18"
 	src["time_no_layout"] = "2023-08-19 10:07:40"
 	src["ignore"] = "ignore"
 
 	var dest testType
 
+	mapper := nmapper.NewMapper()
+	_ = mapper.Parse(&dest, src, false)
+	fmt.Printf("%+v\n", dest)
+}
+
+type testFlattenInnerType struct {
+	A int `json:"a"`
+	C int `json:"c"`
+}
+type testFlattenInnerType2 struct {
+	B  int                  `json:"b"`
+	AT testFlattenInnerType `json:"t"`
+}
+type testFlattenInnerType3 struct {
+	M3 map[string]string `json:"m3"`
+}
+type testFlattenType struct {
+	testFlattenInnerType
+	T    *testFlattenInnerType  `json:"t"`
+	TT   *testFlattenInnerType  `json:"tt"`
+	T2   testFlattenInnerType2  `json:"t2"`
+	T3   *testFlattenInnerType3 `json:"t3"`
+	M    map[string]string      `json:"m"`
+	M2   map[string]any         `json:"m2"`
+	Int  int                    `json:"int"`
+	Time time.Time              `json:"time,layout=2006-01-02"`
+}
+
+func TestParseFlatten(t *testing.T) {
+	src := make(map[string]string)
+	src["a"] = "1"
+	src["c"] = "2"
+	src["t.a"] = "1"
+	src["tt.a"] = "11"
+	src["tt.c"] = "33"
+	src["t2.b"] = "2"
+	src["t2.t.a"] = "3"
+	src["t2.at.a"] = "4"
+	src["t3.m3.a"] = "a"
+	src["t3.m3.b"] = "b"
+	src["m.dd"] = "x.xx"
+	src["m2.a1.b1"] = "xx"
+	src["m2.a2.b2.c2"] = "xx"
+	src["int"] = "99"
+	src["time"] = "2010-09-18"
+
+	var dest testFlattenType
+
+	mapper := nmapper.NewMapper()
+	mapper.SetTypeWrapper(wrapper.StrWrapper()...)
+
+	_ = mapper.Parse(&dest, src, true)
+
+	fmt.Printf("%+v\n", dest)
+}
+
+func TestParse(t *testing.T) {
+	src := make(map[string]any)
+	src["t"] = map[string]any{"a": "1"}
+	src["tt"] = map[string]any{"a": "11", "c": "33"}
+	src["t2"] = map[string]any{"b": "2", "t": map[string]any{"a": "3"}, "at": map[string]any{"a": "4"}}
+	src["m"] = map[string]string{"dd": "x.xx"}
+	src["m2"] = map[string]any{"a1": map[string]any{"b1": "xx"}, "a2": map[string]any{"b2": map[string]any{"c2": "xx"}}}
+	src["int"] = "99"
+	src["time"] = "2010-09-18"
+	src["a"] = "1"
+
+	var dest testFlattenType
+
 	mapper := nmapper.NewMapper()
 	mapper.SetTypeWrapper(wrapper.StrWrapper()...)
 
-	_ = mapper.ParseStrMap(&dest, src)
+	_ = mapper.Parse(&dest, src, false)
 
 	fmt.Printf("%+v\n", dest)
 }