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Project Documentation: Go Application for JSON File CRUD Operations

This project is a Go application that performs basic CRUD (Create, Read, Update, Delete) operations on a JSON file named person.json. It demonstrates how to work with JSON data and file I/O in Go.

Features

  1. Data Structure:

    • Defines a Person struct with Name (string) and Age (uint) fields.

  2. Create Data:

    • Function CreateData(a []Person):
      • Creates a new JSON file person.json.
      • Writes an array of Person structs to the file in JSON format.

  3. Read Data:

    • Function ReadData():
      • Opens and reads the person.json file.
      • Outputs the JSON content to the console.

  4. Update Data:

    • Function UpdateData(a []Person):
      • Opens person.json in write mode.
      • Overwrites the existing content with new JSON data from an array of Person structs.

  5. Delete Data:

    • Function DeletData():
      • Deletes the person.json file from the filesystem.

  6. Main Execution Flow:

    • Creates initial data with two Person entries and writes to person.json.
    • Reads and displays the file content.
    • Updates the data with a new set of Person entries.
    • Reads and displays the updated file content.
    • Deletes the person.json file.

How to Run

  1. Prerequisites:

    • Install Go (version 1.13 or higher).

  2. Setup:

    • Save the provided code in a file named main.go.

  3. Running the Application:

    • Open a terminal and navigate to the directory containing main.go.
    • Execute the command: 
      go run main.go
    • The application will perform the following steps:
      • Create person.json with initial data.
      • Read and display the content of person.json.
      • Update person.json with new data.
      • Read and display the updated content.
      • Delete person.json.

  4. Expected Output:

    • Messages indicating the success or failure of each operation.
    • The content of person.json before and after the update.

Technologies Used

  • JSON Encoding/Decoding: Utilizes Go's encoding/json package to marshal and unmarshal data.
  • File I/O Operations: Uses Go's os and io packages for file handling.
  • Standard Library: No external dependencies required.