Jetty Deploy War Example

In this example, we will see how to deploy a war file on a jetty and run the web application. In general, jetty server instance configures the deploy module. This will have web application deployer that hot deploys files. But other way to deploy a war file is through deployable descriptor XML file.

1. Environment

• Windows 7 SP 1
• Eclipse Kepler 4.3
• Jetty version 9.2.15.v20160210
• Java version 7
• Java servlet library – servlet-api-3.1
• Maven 3.0.4

2. Example Outline

In this example, we will create a sample example project and export that as a WAR file to deploy on jetty . And then we will configure the same project with deployable descriptor xml file with additional configuration parameters like context path.

3. Jetty Deploy War Example

Here we will create an eclipse project with a servlet and deploy that on jetty. We will deploy the same project with context path in second part of our example.

3.1 Create an Eclipse Project

Create a new Dynamic Web Project in eclipse. Go to File -> New Project -> Web -> Dynamic Web Project.

After creating the project, we will add a servlet-api jar file so we can write our servlet.

1. Go to Src folder in project directory and right click to select New Servlet
2. Enter Package name com.javacodegeeks.example
3. Enter Servlet Name – WarServlet
4. Keep default options and click Finish
5. We will add some code in our WarServlet in doGet method.

WarServlet.java

 
package com.javacodegeeks.example;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Servlet implementation class WarServlet
 */
@WebServlet(description = "Jetty War Deploy Example", urlPatterns = { "/WarServlet" })
public class WarServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;

    /**
     * Default constructor. 
     */
    public WarServlet() {
        
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		
		response.setContentType("text/html");
		response.getWriter().println(" Jetty War Deploy Example with a simple Servlet ");
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		
	}

}

1. Export the project from eclipse as war file JettyWarExample
2. Copy this WAR file in jetty.base/webapps directory.