Home > Backend Development > Golang > How to Read a JSON File as a JSON Object in Go?

How to Read a JSON File as a JSON Object in Go?

DDD
Release: 2024-11-10 11:34:03
Original
1038 people have browsed it

How to Read a JSON File as a JSON Object in Go?

Reading JSON Files as JSON Objects in Go

In Go, reading a JSON file as a JSON object requires specific handling due to the use of pointers in the Unmarshal function.

Failed Attempts:

Your initial attempt failed because the data variable did not point to a valid memory address for the JSON values to be stored.

Your second attempt stored the JSON values as a string, which prevents direct access to specific object properties.

Correct Approach:

To read a JSON file as a JSON object, use the following steps:

  1. Read the file into a byte slice using ioutil.ReadFile:

    plan, _ := ioutil.ReadFile(filename)
    Copy after login
  2. Create a pointer to an empty interface (this is where the JSON values will be stored):

    var data interface{}
    Copy after login
  3. Use json.Unmarshal to decode the JSON data into the interface pointer:

    err := json.Unmarshal(plan, &data)
    Copy after login

Note:

  • It's important to check the error returned by ReadFile and Unmarshal.
  • To access specific object properties, you'll need to use type assertion on the data interface.
  • Consider using a concrete struct to unmarshal the JSON data for more structured access to object properties.

The above is the detailed content of How to Read a JSON File as a JSON Object in Go?. For more information, please follow other related articles on the PHP Chinese website!

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template