Jooby Usage Overview

Jooby is a lightweight web framework for Java that simplifies the construction of web applications. This guide aims to provide beginners with essential insights into using Jooby effectively.

Key Concepts

• Micro Framework: Jooby is designed to be modular and lightweight, allowing developers to utilize only the components they need.
• Routing: It offers an intuitive way to define routes for web request handling.
• Dependency Injection: Jooby supports dependency injection, facilitating easier management of application components.
• Built-in Features: The framework comes with features such as HTTP sessions, cookie management, and JSON handling out of the box.

Getting Started

To begin using Jooby, follow these steps:

1. Add Jooby Dependency: Include Jooby in your project. For Maven users, add the following to your pom.xml:
2. Create Your Application: Extend the Jooby class to define your application.
3. Run Your Application: Create a main method to execute your application.

public static void main(String[] args) {
    run(MyApp::new, args);
}

import org.jooby.Jooby;

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

<dependency>
    <groupId>org.jooby</groupId>
    <artifactId>jooby</artifactId>
    <version>latest-version</version>
</dependency>

Defining Routes

Routes in Jooby are defined using methods that correspond to HTTP verbs (GET, POST, etc.). Here are some examples:

• GET Route: Responds to a GET request.
• POST Route: Handles form submissions or API calls.

post("/submit", () -> {
    // Handle POST data
    return "Form submitted!";
});

get("/hello", () -> "Hello, World!");

Middleware

Jooby enables the use of middleware for various tasks such as authentication, logging, or error handling. You can add middleware as follows:

before(ctx -> {
    // Code to run before processing a request
});

Conclusion

In summary, Jooby is a straightforward framework that empowers developers to quickly create web applications in Java. Its simple routing, built-in features, and support for dependency injection make it an excellent choice for beginners aiming to build their own applications.