How to Generate WAR file and deploy Our Web Service App on Apache Tomcat on Amazon EC2 Linux Server?

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Deploying Your Web App to AWS EC2

Deploying a web application can seem scary, but it’s actually a very logical process. In this guide, we will walk through how to take your Java Web Service, package it into a WAR file, and get it running on a professional server like Apache Tomcat hosted on Amazon EC2.

Step 1: Generating the WAR File

A WAR (Web Application Archive) file is like a package that contains everything your web app needs to run. Using your favorite IDE (like Eclipse or IntelliJ) or Maven, you generate this file so it can be "dropped" into a server.

Step 2: Setting Up Amazon EC2

Amazon EC2 provides a virtual computer in the cloud. For this setup, we use a Linux-based instance. You'll need to:

• Launch an EC2 instance.
• Configure Security Groups to allow traffic on Port 8080 (where Tomcat lives).
• Connect to your instance via SSH.

Step 3: Installing Apache Tomcat

Apache Tomcat is the engine that actually "runs" your Java code. We install Tomcat on the EC2 instance, making sure Java is also installed. Once Tomcat is running, you can access its management page through your EC2 instance's IP address.

Step 4: Deployment and Verification

Finally, we upload our WAR file to the Tomcat webapps folder. Tomcat automatically detects it and starts the application. You can then test your Web Service using the public DNS of your AWS instance!

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How to run the Spring Boot application as a stand-alone Java application? | RESTful Web Services

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Running Spring Boot Apps Stand-Alone

One of the greatest features of Spring Boot is its ability to be packaged as a stand-alone executable. No more manual server installations! In this tutorial, we explore how to "unleash" your application so it can run anywhere with just a Java runtime.

The Magic of Fat JARs

Spring Boot uses a "Fat JAR" (or Uber JAR) approach. This means your application code and all its dependencies—including the web server (like Tomcat)—are bundled into a single file. Benefits include:

• Portability: Run the same file on your local machine, a server, or in the cloud.
• Simplicity: No need to configure external application servers.
• Microservices Ready: The perfect format for containerized environments like Docker.

How to Run Your App

Once you've built your project using Maven or Gradle, running it is as simple as a single command in your terminal or command prompt:

java -jar target/your-app-name.jar

Why Stand-Alone?

This approach simplifies the deployment pipeline and reduces the "it works on my machine" syndrome. By embedding the runtime environment within the application, you ensure consistency across all stages of development and production.

📥 Download Slides & Code!

I have made the full source code and PowerPoint presentation for this deployment tutorial available! Check the YouTube video description for the direct links.