Go语言JSON数据相互转换

目录

• 结构体转json
• map转json
• int转json
• slice转json
• json反序列化为结构体
• json反序列化为map

结构体转json

结构体转json示例:

package main

import (
	"encoding/json"
	"fmt"
)

//用户
type User struct {
	UserName string `json:"username"`
	NickName string `json:"nickname"`
	Age 	 int    `json:"age"`
	Birthday string `json:"birthday"`
	Sex      string `json:"sex"`
	Email    string `json:"email"`
	Phone    string `json:"phone"`
}

//结构体转JSON
func structToJSON() {

	user := User{
		UserName: "itbsl",
		NickName: "jack",
		Age:   	  18,
		Birthday: "2001-08-15",
		Sex:      "itbsl@gmail.com",
		Phone:    "176XXXX6688",
	}

	data, err := json.Marshal(user)

	if err != nil {
		fmt.Println("json.marshal failed, err:", err)
		return
	}

	fmt.Printf("%s\n", string(data))
}

func main() {

	structToJSON()

}

输出结果：

{"username":"itbsl","nickname":"jack","age":18,"birthday":"2001-08-15","sex":"itbsl@gmail.com","email":"","phone":"176XXXX6688"}

map转json

map转json示例:

package main

import (
	"encoding/json"
	"fmt"
)

//map转json
func mapToJSON(tempMap *map[string]interface{}) string {

	data, err := json.Marshal(tempMap)

	if err != nil {
		panic(err)
	}

	return string(data)
}

func main() {

	tempMap := make(map[string]interface{})

	tempMap["username"] = "itbsl"
	tempMap["age"] = 18
	tempMap["sex"] = "male"

	str := mapToJSON(&tempMap)

	fmt.Println(str)

}

输出结果:

{"age":18,"sex":"male","username":"itbsl"}

int转json

int转json

package main

import (
	"encoding/json"
	"fmt"
)

func testInt() {
	var age = 100
	data, err := json.Marshal(age)
	if err != nil {
		fmt.Printf("json.marshal failed, err:", err)
		return
	}

	fmt.Printf("%s\n", string(data))
}

func main() {
	testInt()
}

输出结果:

100

slice转json

slice转json

package main

import (
	"encoding/json"
	"fmt"
)

//slice转json
func sliceToJSON(s []map[string]interface{}) string {

	data, err := json.Marshal(s)

	if err != nil {
		panic(err)
	}

	return string(data)

}

func main() {

	var s []map[string]interface{}

	tempMap := make(map[string]interface{})

	tempMap["username"] = "itbsl"
	tempMap["age"] = 18
	tempMap["sex"] = "male"

	s = append(s, tempMap)

	tempMap = make(map[string]interface{})

	tempMap["username"] = "jane"
	tempMap["age"] = 23
	tempMap["sex"] = "female"

	s = append(s, tempMap)

	str := sliceToJSON(s)

	fmt.Println(str)
}

输出结果:

[{"age":18,"sex":"male","username":"itbsl"},{"age":23,"sex":"female","username":"jane"}]

json反序列化为结构体

json转结构体:

package main

import (
	"encoding/json"
	"fmt"
)

//用户
type User struct {
	UserName string `json:"username"`
	NickName string `json:"nickname"`
	Age 	 int    `json:"age"`
	Birthday string `json:"birthday"`
	Sex      string `json:"sex"`
	Email    string `json:"email"`
	Phone    string `json:"phone"`
}

//结构体转JSON
func structToJSON() string {

	user := User{
		UserName: "itbsl",
		NickName: "jack",
		Age:   	  18,
		Birthday: "2001-08-15",
		Sex:      "itbsl@gmail.com",
		Phone:    "176XXXX6688",
	}

	data, err := json.Marshal(user)

	if err != nil {
		fmt.Println("json.marshal failed, err:", err)
		return ""
	}

	return string(data)
}

//json转结构体
func JSONToStruct(str string) {

	var user User

	err := json.Unmarshal([]byte(str), &user)

	if err != nil {

		panic(err)
	}

	fmt.Println(user)

}

func main() {

	JSONToStruct(structToJSON())
}

输出结果:

{itbsl jack 18 2001-08-15 itbsl@gmail.com  176XXXX6688}

json反序列化为map

json转map

package main

import (
	"encoding/json"
	"fmt"
)

//map转json
func mapToJSON(tempMap *map[string]interface{}) string {

	data, err := json.Marshal(tempMap)

	if err != nil {
		panic(err)
	}

	return string(data)
}

func JSONToMap(str string) {

	var tempMap map[string]interface{}

	err := json.Unmarshal([]byte(str), &tempMap)

	if err != nil {
		panic(err)
	}

	fmt.Println(tempMap)

}

func main() {

	tempMap := make(map[string]interface{})

	tempMap["username"] = "itbsl"
	tempMap["age"] = 18
	tempMap["sex"] = "male"

	str := mapToJSON(&tempMap)

	JSONToMap(str)
}

输出结果:

map[age:18 sex:male username:itbsl]