Last updated on Jun 19, 2021 by Suraj Sharma
In this tutorial, you will learn to convert a known JSON string to a Golang struct using the package json
by importing encoding/json
import "encoding/json"
To convert a known JSON string to a struct data type we use the UnMarshal
function
package main
import (
"encoding/json"
"fmt"
)
type Post struct {
ID uint `json:"id"`
Title string `json:"title"`
Author string `json:"author"`
Content string `json:"content"`
}
func main () {
// create an instance of Post struct
post := Post{}
// convert a JSON string to a []byte first
b := []byte(`{"id":1,"title":"Golang Tutorial","author":"Suraj Sharma","content":"Learn Golang by examples"}`)
// use json.UnMarshal to convert the []byte of JSON data to struct
// by passing pointer to post variable as a second argument
err := json.Unmarshal(b, &post)
if err != nil {
fmt.Println("Unable to convert the JSON string to a struct")
} else {
// print the post
fmt.Println(post)
}
}
// Output
// {1 Golang Tutorial Suraj Sharma Learn Golang by examples}
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Suraj Sharma is the founder of Future Gen AI Services. He holds a B.Tech degree in Computer Science & Engineering from NIT Rourkela.