Spring Boot 3 + PostgreSQL Docker Example

This example project follows this tutorial and demonstrates the use of Spring Boot 3 with Java 17, the maven build system, a PostgreSQL database as well as containerizing everything with docker.

Running the app locally

Set up a PostgreSQL installation and create a database using e.g. PgAdmin 4 according to the properties in the application.properties. Run the application from your IDE or via mvn spring-boot:run. Verify it works correctly without any warnings or errors in the terminal. Then, shut down the application once again.

Running the app from a docker container

First, compile the whole app via mvn clean package -DskipTests. Then, copy the compiled executable JAR file to the docker directory with the following command: cp target/spring-boot-postgresql-docker-0.0.1-SNAPSHOT.jar src/main/docker Navigate into the docker folder via cd src/main/docker. Make sure docker is installed and the daemon is started. Now run the command docker-compose up to set up and execute your docker container based on the docker-compose.yml. Verify that the app once again works as expected.