Go语言JSON数据相互转换
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]
