How do you configure Spring Boot with PostgreSQL?

Table of Contents

• Introduction
• Steps to Configure Spring Boot with PostgreSQL
  • 1. Set Up PostgreSQL
    • Example: Create a Database
  • 2. Add PostgreSQL Dependency
    • Maven
    • Gradle
  • 3. Configure application.properties or application.yml
    • Example: application.properties
    • Example: application.yml
  • 4. Test the Connection
    • Example: Entity Class
    • Example: Repository
    • Example: Test Controller
• Practical Example
  • Adding an Employee
    • Create Employee (POST Request)
    • Retrieve Employees (GET Request)
• Conclusion

Introduction

Spring Boot provides seamless integration with PostgreSQL, a powerful open-source relational database. Configuring PostgreSQL in a Spring Boot application involves setting up the database, defining properties, and connecting it to your application. This guide walks you through these steps with practical examples to ensure a smooth configuration process.

Steps to Configure Spring Boot with PostgreSQL

1. Set Up PostgreSQL

Before integrating PostgreSQL with Spring Boot:

• Install PostgreSQL from PostgreSQL Downloads.
• Create a database for your application using psql or a GUI tool like pgAdmin.

Example: Create a Database

2. Add PostgreSQL Dependency

Include the PostgreSQL JDBC driver in your pom.xml for Maven or build.gradle for Gradle.

Maven

Gradle

3. Configure application.properties or application.yml

Define the database connection settings in your configuration file.

Example: application.properties

Example: application.yml

4. Test the Connection

Create an entity class and a corresponding repository to test the connection.

Example: Entity Class

Example: Repository

Example: Test Controller

Practical Example

Adding an Employee

Run the application and test the endpoints using tools like Postman or curl.

Create Employee (POST Request)

Retrieve Employees (GET Request)

Response:

Conclusion

Integrating PostgreSQL with Spring Boot is straightforward and highly beneficial for building robust, scalable applications. By configuring the database connection, defining entities, and creating repositories, you can efficiently interact with PostgreSQL from your Spring Boot application. This configuration supports the development of modern, data-driven applications.