diff --git a/json/json.go b/json/json.go
new file mode 100644
index 0000000..ddaf3b9
--- /dev/null
+++ b/json/json.go
@@ -0,0 +1,14 @@
+//go:build !jsoniter
+// +build !jsoniter
+
+package json
+
+import "encoding/json"
+
+var (
+	Marshal       = json.Marshal
+	Unmarshal     = json.Unmarshal
+	MarshalIndent = json.MarshalIndent
+	NewDecoder    = json.NewDecoder
+	NewEncoder    = json.NewEncoder
+)
diff --git a/json/jsonconv.go b/json/jsonconv.go
new file mode 100644
index 0000000..72fb2bb
--- /dev/null
+++ b/json/jsonconv.go
@@ -0,0 +1,137 @@
+package json
+
+import (
+	"bytes"
+	"log"
+	"regexp"
+	"strconv"
+	"strings"
+	"unicode"
+
+	"github.com/charlienet/go-mixed/bytesconv"
+)
+
+// 下划线
+type SnakeCase struct {
+	Value interface{}
+}
+
+func (c SnakeCase) MarshalJSON() ([]byte, error) {
+	var keyMatchRegex = regexp.MustCompile(`\"(\w+)\":`)
+	var wordBarrierRegex = regexp.MustCompile(`(\w)([A-Z])`)
+
+	marshalled, err := Marshal(c.Value)
+	converted := keyMatchRegex.ReplaceAllFunc(
+		marshalled,
+		func(match []byte) []byte {
+			return bytes.ToLower(wordBarrierRegex.ReplaceAll(
+				match,
+				bytesconv.StringToBytes(`${1}_${2}`),
+			))
+		},
+	)
+	return converted, err
+}
+
+// 驼峰
+type CamelCase struct {
+	Value interface{}
+}
+
+func (c CamelCase) MarshalJSON() ([]byte, error) {
+	var keyMatchRegex = regexp.MustCompile(`\"(\w+)\":`)
+	marshalled, err := Marshal(c.Value)
+	converted := keyMatchRegex.ReplaceAllFunc(
+		marshalled,
+		func(match []byte) []byte {
+			matchStr := bytesconv.BytesToString(match)
+			key := matchStr[1 : len(matchStr)-2]
+			resKey := Lcfirst(Case2Camel(key))
+			return bytesconv.StringToBytes(`"` + resKey + `":`)
+		},
+	)
+	return converted, err
+}
+
+// 驼峰式写法转为下划线写法
+func Camel2Case(name string) string {
+	buffer := NewBuffer()
+	for i, r := range name {
+		if unicode.IsUpper(r) {
+			if i != 0 {
+				buffer.Append('_')
+			}
+			buffer.Append(unicode.ToLower(r))
+		} else {
+			buffer.Append(r)
+		}
+	}
+	return buffer.String()
+}
+
+// 下划线写法转为驼峰写法
+func Case2Camel(name string) string {
+	name = strings.Replace(name, "_", " ", -1)
+	// name = strings.Title(name)
+	return strings.Replace(name, " ", "", -1)
+}
+
+func Case2CamelBytes(name []byte) []byte {
+	ret := Case2Camel(string(name))
+	return bytesconv.StringToBytes(ret)
+}
+
+// 首字母大写
+func Ucfirst(str string) string {
+	for i, v := range str {
+		return string(unicode.ToUpper(v)) + str[i+1:]
+	}
+	return ""
+}
+
+// 首字母小写
+func Lcfirst(str string) string {
+	for i, v := range str {
+		return string(unicode.ToLower(v)) + str[i+1:]
+	}
+	return ""
+}
+
+// 内嵌bytes.Buffer，支持连写
+type Buffer struct {
+	*bytes.Buffer
+}
+
+func NewBuffer() *Buffer {
+	return &Buffer{Buffer: new(bytes.Buffer)}
+}
+
+func (b *Buffer) Append(i interface{}) *Buffer {
+	switch val := i.(type) {
+	case int:
+		b.append(strconv.Itoa(val))
+	case int64:
+		b.append(strconv.FormatInt(val, 10))
+	case uint:
+		b.append(strconv.FormatUint(uint64(val), 10))
+	case uint64:
+		b.append(strconv.FormatUint(val, 10))
+	case string:
+		b.append(val)
+	case []byte:
+		b.Write(val)
+	case rune:
+		b.WriteRune(val)
+	}
+	return b
+}
+
+func (b *Buffer) append(s string) *Buffer {
+	defer func() {
+		if err := recover(); err != nil {
+			log.Println("*****内存不够了!******")
+		}
+	}()
+	b.WriteString(s)
+	return b
+}
diff --git a/json/jsoniter.go b/json/jsoniter.go
new file mode 100644
index 0000000..1a105ed
--- /dev/null
+++ b/json/jsoniter.go
@@ -0,0 +1,15 @@
+//go:build jsoniter
+// +build jsoniter
+
+package json
+
+import jsoniter "github.com/json-iterator/go"
+
+var (
+	json          = jsoniter.ConfigCompatibleWithStandardLibrary
+	Marshal       = json.Marshal
+	Unmarshal     = json.Unmarshal
+	MarshalIndent = json.MarshalIndent
+	NewDecoder    = json.NewDecoder
+	NewEncoder    = json.NewEncoder
+)
diff --git a/json/structConvert.go b/json/structConvert.go
new file mode 100644
index 0000000..4e4dd70
--- /dev/null
+++ b/json/structConvert.go
@@ -0,0 +1,54 @@
+package json
+
+import (
+	"reflect"
+
+	"github.com/charlienet/go-mixed/bytesconv"
+)
+
+// 结构转换为json字符串
+func StructToJsonIndent(obj interface{}) string {
+	b, _ := MarshalIndent(obj, "", "  ")
+	return bytesconv.BytesToString(b)
+}
+
+// 结构转换为json字符串
+func StructToJson(obj interface{}) string {
+	b, _ := Marshal(obj)
+	return bytesconv.BytesToString(b)
+}
+
+func StructToMap(obj interface{}) map[string]interface{} {
+	typ := reflect.TypeOf(obj)
+
+	kind := typ.Kind()
+	if kind == reflect.Map {
+		return toMap(obj)
+	}
+
+	val := reflect.ValueOf(obj)
+
+	m := make(map[string]interface{})
+	for i := 0; i < val.NumField(); i++ {
+		m[typ.Field(i).Name] = val.Field(i).Interface()
+	}
+
+	return m
+}
+
+func StructToMapViaJson(obj interface{}) map[string]interface{} {
+	m := make(map[string]interface{})
+
+	j, _ := Marshal(obj)
+	_ = Unmarshal(j, &m)
+
+	return m
+}
+
+func toMap(obj interface{}) map[string]interface{} {
+	if h, ok := obj.(map[string]interface{}); ok {
+		return h
+	}
+
+	return StructToMapViaJson(obj)
+}