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Java Web Apps with Visual Studio Code

This tutorial shows you how to create a Java web application with Visual Studio Code. You'll learn how to deploy a Java web application to a Linux Tomcat server in Azure App Service.

Scenario

A simple Hello World web app.

[Greeting from Java]

Before you begin

Before running and deploying this sample, you must have the Java SE Development Kit (JDK) and Apache Maven build tools on your local development environment. If you don't have, please install them.

Download and install the Extension Pack for Java, which has JDK 11 included.

Note: The JAVA_HOME environment variable must be set to the install location of the JDK to complete this tutorial.

Download Apache Maven version 3 or greater:

Download Apache Maven

Install Apache Maven for your local development environment:

Install Apache Maven

Create a Maven Web App project

maven-archetype-webapp is an archetype which generates a Maven Web App project. To learn more, you can visit this documentation.

In an empty folder, run the following command to generate a new project from a Maven archetype.

cd webapp-project

Deploy Web Apps to the cloud

We just built a Java web application and ran it locally. Now you will learn how to deploy from Visual Studio Code and run it on Azure in the cloud.

If you don't have an Azure subscription, you can sign up for a free Azure account.

Create your free Azure account

Install the Azure App Service extension

The Azure App Service extension is used to create, manage, and deploy to Azure App Service with key features including:

Create new Azure Web App/Deployment Slot
Deploy to Azure Web App/Deployment Slot
Start, stop, and restart the Azure Web App/Deployment Slot
View a Web App's log files
Swap Deployment Slots

To install the Azure App Service extension, open the Extensions view (X (Windows, Linux Ctrl+Shift+X)) and search for azure app service to filter the results. Select the Microsoft Azure App Service extension. For a more command-line Maven-centric experience, you can also check out the Maven plugin for Azure App Service Linux tutorial.

Sign in to your Azure subscription

To sign in to Azure, run Azure: Sign In from the Command Palette (P (Windows, Linux Ctrl+Shift+P)). Or you can sign in to your Azure Account by clicking Sign in to Azure... in RESOURCES Explorer.

[Azure sign in code]

Create a new Web App on Azure

Once the extension is installed, you can take the following steps to create a new Web App on Azure.

Click Create button on the RESOURCES Explorer view and select Create App Service Web App....
Enter a unique name for the new Web App.
Select the runtime task of the Web App, for example Java 17.
Select the Java web server stack, for example Apache Tomcat 10.0.
Select a pricing tier, for example Free(F1).

[Create a Web App]

Build and deploy to a Web App

The deploy process leverages the Azure Resources extension (installed along with the Azure App Service extension as a dependency) and you need to sign in with your Azure subscription. If you do not have an Azure subscription, sign up today for a free 30 day account and get $200 in Azure Credits to try out any combination of Azure services.

Once you have signed in, you can open the command prompt or terminal window and build the project using Maven commands. This will generate a new war or jar artifact in the target directory.

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