go-自定义-struct-转-json

type Student struct {
  Name string `json:"name"`
  Age int `json:"age"`
}

strIn := `{
  "stu_name": "Jim Green",
  "age": 14
}`

// to json
strOut := `{
  "name": "Jim Green",
  "age": 14
}`

package main

import (
	"encoding/json"
	"fmt"
)

type Student struct {
	Name string `json:"name"`
	Age  int    `json:"age"`
}

func (s *Student) UnmarshalJSON(data []byte) error {
	type Alias Student

	aux := &struct {
		*Alias
		StuName string `json:"stu_name"`
	}{
		Alias: (*Alias)(s),
	}

	if err := json.Unmarshal(data, &aux); err != nil {
		return err
	}

	s.Name = aux.StuName
	return nil
}

func main() {
	strIn := `{
  "stu_name": "Jim Green",
  "age": 14
}`

	var stu Student
	json.Unmarshal([]byte(strIn), &stu)

	res, _ := json.Marshal(stu)
	fmt.Println(string(res))
}