Developing a Spring Boot application

In this tutorial, you will learn how to create a Spring Boot application using Spring Initializr and add flake.nix for development.

Initialize a Spring Boot project

1. Go to Spring Initializr and configure your project. This example chooses Gradle (Kotlin) and the Java language. You can also add dependencies as needed. Click Generate to download the project as a ZIP file.

2. Extract the ZIP file to your desired location:

   unzip demo.zip
   cd demo

Add flake.nix to the project

1. Initialize the Java template from the root directory of the Spring Boot project:

   nix flake init -t github:akirak/flake-templates#java

2. Ensure the JDK version in your flake.nix matches your project requirement:

     jdk = pkgs.openjdk21_headless;

3. Add .envrc:

   use flake

4. Allow direnv:

   direnv allow