go 第三方json库

package main

import (
	"bytes"
	"encoding/json"
	"fmt"
	"os"
	"strings"
	"github.com/json-iterator/go"
)

func main() {

	// marshal
	type ColorGroup struct {
		ID     int
		Name   string
		Colors []string
	}
	group := ColorGroup{
		ID:     1,
		Name:   "Reds",
		Colors: []string{"Crimson", "Red", "Ruby", "Maroon"},
	}
	b, err := json.Marshal(group)
	if err != nil {
		fmt.Println("error:", err)
	}
	os.Stdout.Write(b)
	fmt.Println("json marshal")
	// 格式化显示
	var sttr bytes.Buffer
	json.Indent(&sttr, []byte(b), "", "    ")
	fmt.Println("formated: ", sttr.String())
	fmt.Println("格式化显示")

	var json_iterator = jsoniter.ConfigCompatibleWithStandardLibrary
	b, err = json_iterator.Marshal(group)
	os.Stdout.Write(b)
	fmt.Println("json_iterator marsahl")



	// unmarshal
	var jsonBlob = []byte(`[
        {"Name": "Platypus", "Order": "Monotremata"},
        {"Name": "Quoll",    "Order": "Dasyuromorphia"}
    ]`)
	type Animal struct {
		Name  string
		Order string
	}
	var animals []Animal
	errr := json.Unmarshal(jsonBlob, &animals)
	if errr != nil {
		fmt.Println("error:", errr)
	}
	fmt.Printf("%+v", animals)
	fmt.Println("json unmarshal")

	var animals2 []Animal
	var json_iteratorr = jsoniter.ConfigCompatibleWithStandardLibrary
	json_iteratorr.Unmarshal(jsonBlob, &animals2)
	fmt.Printf("%+v", animals2)
	fmt.Println("json_iterator unmarshal")


	// get the json value
	val := []byte(`{"ID":1,"Name":"Reds","Colors":["Crimson","Red","Ruby","Maroon"]}`)
	str := jsoniter.Get(val, "Colors", 0).ToString()
	fmt.Println(str)

	val1 := []byte(`{"ID":1,"Name":"Reds","Colors":["Crimson","Red","Ruby","Maroon"]}`)
	str1 := jsoniter.Get(val1, "Colors", 1).ToString()
	fmt.Println(str1)


	// NewDecoder
	json := jsoniter.ConfigCompatibleWithStandardLibrary
	reader := strings.NewReader(`{"branch":"beta","change_log":"add the rows{10}","channel":"fros","create_time":"2017-06-13 16:39:08","firmware_list":"","md5":"80dee2bf7305bcf179582088e29fd7b9","note":{"CoreServices":{"md5":"d26975c0a8c7369f70ed699f2855cc2e","package_name":"CoreServices","version_code":"76","version_name":"1.0.76"},"FrDaemon":{"md5":"6b1f0626673200bc2157422cd2103f5d","package_name":"FrDaemon","version_code":"390","version_name":"1.0.390"},"FrGallery":{"md5":"90d767f0f31bcd3c1d27281ec979ba65","package_name":"FrGallery","version_code":"349","version_name":"1.0.349"},"FrLocal":{"md5":"f15a215b2c070a80a01f07bde4f219eb","package_name":"FrLocal","version_code":"791","version_name":"1.0.791"}},"pack_region_urls":{"CN":"https://s3.cn-north-1.amazonaws.com.cn/xxx-os/ttt_xxx_android_1.5.3.344.393.zip","default":"http://192.168.8.78/ttt_xxx_android_1.5.3.344.393.zip","local":"http://192.168.8.78/ttt_xxx_android_1.5.3.344.393.zip"},"pack_version":"1.5.3.344.393","pack_version_code":393,"region":"all","release_flag":0,"revision":62,"size":38966875,"status":3}`)
	decoder := json.NewDecoder(reader)
	params := make(map[string]interface{})
	eerr := decoder.Decode(&params)
	if err != nil {
		fmt.Println(eerr)
	} else {
		fmt.Printf("%+v\n", params)
	}
	fmt.Println("jsoniter NewDecoder")
	// 格式化显示json
	var buf bytes.Buffer
	e := json.NewEncoder(&buf)
	e.SetIndent("","    ")	// 设置4个空格作为缩进
	// 进行json编码
	if err := e.Encode(params); err != nil {
	}
	fmt.Println(string(buf.Bytes()))
	fmt.Println("格式化显示")

}