A barebones Java app that connects into PostgreSQL database, which can easily be deployed to Heroku.

This application supports the Getting Started with Java on Heroku article - check it out.

Make sure you have Java and Maven installed. Also, install the Heroku CLI.

$ git clone https://github.com/carloskafka/heroku.git
$ cd heroku
$ mvn install
$ heroku local:start

Your app should now be running on localhost:5000.

If you're going to use a database, ensure you have a local .env file that reads something like this:

DATABASE_URL=postgres://localhost:5432/java_database_name

$ heroku create
$ git push heroku master
$ heroku open

You can check this app running on sisrelogioponto.herokuapp.com, at first time it will delay a bit to load because it will start a new node but the second time it will load faster.

At url sisrelogioponto.herokuapp.com/db, you can check some values reading from postgres database.

For more information about using Java on Heroku, see these Dev Center articles:

• Java on Heroku