How to Convert a JSON String to a Map in Go

How to Convert a JSON String to a Map in Go ?

Answer

To convert a JSON string to a map in Go, you can use the encoding/json package, which provides the Unmarshal function to parse JSON data into a map.

✐ Examples

1 Converting a JSON String to a Map

We can convert a JSON string to a map in Go by using the encoding/json package's Unmarshal function to parse the JSON string and then converting the result into a map.

For example,

We start by importing the necessary package: encoding/json.
We define a JSON string containing key-value pairs.
We declare an empty map to store the key-value pairs.
We use the json.Unmarshal function to parse the JSON string into the map.
We print the resulting map to the console to verify the conversion.

Go Program

package main

import (
    "encoding/json"
    "fmt"
)

func main() {
    // Define a JSON string
    jsonString := `{"1": 10, "2": 20, "3": 30, "4": 40, "5": 50}`

    // Declare an empty map to store the key-value pairs
    var myMap map[string]int

    // Parse the JSON string into the map
    json.Unmarshal([]byte(jsonString), &myMap)

    // Print the resulting map
    fmt.Println("Map from JSON string:")
    for key, value := range myMap {
        fmt.Printf("%s: %d\n", key, value)
    }
}

Output

Map from JSON string:
1: 10
2: 20
3: 30
4: 40
5: 50

Summary

In this tutorial, we learned How to Convert a JSON String to a Map in Go language with well detailed examples.

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