Go Json解码和编码

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26

vcard.go

package vcard

import (
	"time"
)

type Address struct {
	Street           string
	HouseNumber      uint32
	HouseNumberAddOn string
	POBox            string
	ZipCode          string
	City             string
	Country          string
}

type VCard struct {
	FirstName string
	LastName  string
	NickName  string
	BirtDate  time.Time
	Photo     string
	Addresses map[string]*Address
}

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11

jsonUtil.go
package utils

import (
	"encoding/json"
)

func ToJson(data any) string {
	js, _ := json.Marshal(data)
	return string(js)
}

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52

main.go

package main

import (
	. "awesomeProject/utils"
	. "awesomeProject/vcard"
	"encoding/json"
	"fmt"
	"os"
	"time"
)

func main() {
	pa := &Address{Street: "private", HouseNumber: 10086, HouseNumberAddOn: "Belgium"}
	wa := &Address{Street: "work", HouseNumber: 10008611, HouseNumberAddOn: "Belgium"}
	vc := VCard{FirstName: "Jan", LastName: "Kersschot", NickName: "Mike", BirtDate: time.Date(1956, 1, 17, 15, 4, 5, 0, time.Local)}
	str := ToJson(vc)
	fmt.Println(str)
	str = ToJson(wa)
	fmt.Println(str)
	str = ToJson(pa)
	fmt.Println(str)
	//写入到vcard.json文件
	file, err := os.Create("vcard.json")
	if err != nil {
		fmt.Println(err)
		return
	}
	defer file.Close()
	encoder := json.NewEncoder(file)
	err = encoder.Encode(vc)
	if err != nil {
		return
	}
	fmt.Println("vcard.json created")

	//读取vcard.json文件
	file, err = os.Open("vcard.json")
	if err != nil {
		fmt.Println(err)
		return
	}
	defer file.Close()
	decoder := json.NewDecoder(file)
	var vcard VCard
	err = decoder.Decode(&vcard)
	if err != nil {
		return
	}
	fmt.Println(vcard)
}