Go - Convert JSON to Map type Struct

In this source code example, we show how to convert JSON to Map with an example.

encoding/json package provides utilities that can be used to convert to and from JSON. The same utility can be used to convert a Golang map to JSON string and vice versa.

Go - Convert JSON to Map - Example 1

We are parsing this JSON string into the below map:

package main

import (
	"encoding/json"
	"fmt"
)

func main() {
	j := `{"1":"Ramesh", "2": "Raj", "3": "Amir"}`
	var b map[string]string
	json.Unmarshal([]byte(j), &b)

	fmt.Println(b)
}

Output:

map[1:Ramesh 2:Raj 3:Amir]

Go - Convert JSON to Map - Example 2

In this example, we will convert JSON to Map type Struct:

package main

import (
	"encoding/json"
	"fmt"
)

type Employee struct {
	FirstName string
	LastName string
	Email string
}

func main() {
	j := `{"1":{"FirstName":"Ramesh", "LastName": "Fadatare", "Email": "ramesh@gmail.com"}}`
	var b map[int]Employee
	json.Unmarshal([]byte(j), &b)

	fmt.Println(b)
}

Output:

map[1:{Ramesh Fadatare ramesh@gmail.com}]

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