go语言（十七）----json

1、结构体转json

package main

import (
	"encoding/json"
	"fmt"
)

type Movie struct{

	Title string `json:"title"`
	Year int `json:"year"`
	Price int `json:"rmb"`
	Actors []string `json:"actors"`
}


func main() {

	movie := Movie{"喜剧之王",2000,10,[]string{"xingye","zhangbozhi"}}

	//结构体转json
	jsonStr,err := json.Marshal(movie)
	if err != nil {
		fmt.Println("json marshal error",err)
		return
	}
	fmt.Printf("jsonStr = %s\n",jsonStr)
}

2、json转结构体

package main

import (
	"encoding/json"
	"fmt"
)

type Movie struct{

	Title string `json:"title"`
	Year int `json:"year"`
	Price int `json:"rmb"`
	Actors []string `json:"actors"`
}


func main() {

	movie := Movie{"喜剧之王",2000,10,[]string{"xingye","zhangbozhi"}}

	//结构体转json
	jsonStr,err := json.Marshal(movie)
	if err != nil {
		fmt.Println("json marshal error",err)
		return
	}
	fmt.Printf("jsonStr = %s\n",jsonStr)

	//解码的过程 json转结构体
	//jsonStr = {"title":"喜剧之王","year":2000,"rmb":10,"actors":["xingye","zhangbozhi"]}
	myMovie := Movie{}
	err = json.Unmarshal(jsonStr,&myMovie)

	if err != nil {
		fmt.Println("json unmarshal error",err)
		return

	}
	fmt.Printf("%v\n",myMovie)
}