Getting Started with Jooby: A Lightweight Java Web Framework

Jooby is a web framework for Java that simplifies the process of building web applications. This guide provides an introduction to getting started with Jooby, focusing on key concepts and practical examples.

Key Concepts

• Lightweight Framework: Jooby is designed to be simple and lightweight, making it easy for developers to create web applications without unnecessary complexity.
• Modular: Jooby allows you to use only the modules you need, which helps keep your application lean and efficient.
• Routing: Jooby provides a straightforward way to define routes (URLs) for your application, allowing you to handle different HTTP requests.
• Middleware: Jooby supports middleware, which are functions that can modify requests and responses, allowing for features like authentication and logging.

Getting Started Steps

1. Setup Your Environment:
   • Ensure you have Java Development Kit (JDK) installed.
   • Create a new Maven or Gradle project.
2. Add Jooby Dependency:
4. Create Your First Application:
   • Create a Java class that extends Jooby.
5. Run Your Application:
7. Access Your Application:
   • Once running, open a web browser and go to http://localhost:8080/ to see your application in action.

Create a main method to start your application:

public static void main(String[] args) {
    runApp(MyApp.class, args);
}

Define your routes inside the constructor. For example:

public class MyApp extends Jooby {
    {
        get("/", () -> "Hello, Jooby!");
    }
}

For Gradle, add this to your build.gradle:

implementation 'org.jooby:jooby-jetty:2.10.0'

For Maven, add the following to your pom.xml:

<dependency>
    <groupId>org.jooby</groupId>
    <artifactId>jooby-jetty</artifactId>
    <version>2.10.0</version>
</dependency>

Example Route

Here’s how you can define a simple route that responds to a GET request:

get("/greet/:name", req -> {
    String name = req.param("name").value();
    return "Hello, " + name + "!";
});

This route responds with a personalized greeting based on the name provided in the URL, e.g., /greet/John would return Hello, John!.

Conclusion

Jooby is an excellent choice for developers looking for a simple yet powerful framework to build web applications in Java. With its modular architecture and easy routing, you can quickly get started and create robust applications.

For more detailed information, visit the Jooby Getting Started Guide.