使用encoding/json包反序列化JSON编码的数据

json_decoder.go

package main

import (
	"encoding/json"
	"fmt"
	"io"
	"log"
	"strings"
)

func main() {
	const jsonStream = `
	 	{"Name": "Ed", "Text": "Knock knock."}
        {"Name": "Sam", "Text": "Who's there?"}
        {"Name": "Ed", "Text": "Go fmt."}
        {"Name": "Sam", "Text": "Go fmt who?"}
        {"Name": "Ed", "Text": "Go fmt yourself!"}
	`
	type Message struct {
		Name, Text string
	}

	//func NewDecoder(r io.Reader) *Decoder
	//NewDecoder 主要给r创建一个decoder对象
	dec := json.NewDecoder(strings.NewReader(jsonStream))
	for {
		var m Message
		//Decode 反序列化一个JSON编码的数据，并将结果存储到一个指向v的指针
		if err := dec.Decode(&m); err == io.EOF {
			break
		} else if err != nil {
			log.Fatal(err)
		}
		fmt.Printf("%s: %s\n", m.Name, m.Text)
	}
}

/*
输出结果：
Ed: Knock knock.
Sam: Who's there?
Ed: Go fmt.
Sam: Go fmt who?
Ed: Go fmt yourself!
 */