Golang JSON Marshal (struct to string) (M for "Make json") and Unmarshal (string to struct) (U for "Unmake json") example

json_marshal_unmarshal.go

package main

import (
	"encoding/json"
	"fmt"
)

func main() {
	type MyStruct struct {
		Message string `json:"message"`
	}

	mystruct := &MyStruct{
		Message: "hello",
	}

	// convert struct to json string
	jsonBytes, err := json.Marshal(mystruct)

	fmt.Println(string(jsonBytes), err) // {"message":"hello"} <nil>

	var mystruct_2 *MyStruct

	// convert json string to struct
	err = json.Unmarshal(jsonBytes, &mystruct_2)

	fmt.Println(mystruct_2, err) // &{hello} <nil>
}