Golang中json文件读取与写入

package main

import (
	"encoding/json"
	"fmt"
	"io/ioutil"
	"os"
)

type User struct {
	Name string
	Age  int
}

func main() {
	// 写入json文件
	f, err := os.Create("1.json")
	if err != nil {
		return
	}
	var b = User{
		Name: "90",
		Age:  20,
	}
	str, err := json.Marshal(&b)
	_, err = f.WriteString(string(str))

	// 读取json文件
	o, err := ioutil.ReadFile("1.json")
	if err != nil {
		return
	}
	var b222 User
	err = json.Unmarshal(o, &b222)
	if err != nil {
		return
	}
	fmt.Println(b222.Age, b222.Name, 0000)
}