Hello Web with Tomcat

Complete Hello World in Eclipse before starting this.

Download Tomcat

Download Binary, Core

• Unzip it to somewhere convenient
  • for example C:\
• No need to install anything - Eclipse will take care of it
  • You just need to point Eclipse to the file location and it will take care of the installation
  • If you need to run tomcat outside Eclipse you will need to read some documentation

From Eclipse, start a new project

• File / Project / Web / Dynamic Web Project

Run time environment

Create a new project

• You need to specify the Project name and the Target runtime
• Name your project HelloWeb
• Click New Runtime

New Runtime

Make this match the downloaded version

• Choose the runtime that matches the version you downloaded (7.0)
• In the next step you specify the folder

Specify the folder

Where did you put tomcat?

• Specify the directory where you unzipped tomcat
• Accept the defaults regarding perspective

New Servlet

File New Servlet

• You have a new project - now create a servlet
• The servlet should have a capital letter
• HelloWeb is fine

New Servlet Options

You only need the doGet

• You can accept the default options
• You will only be changing doGet

Firewall Problems

Your firewall may complain

• You may have an issue with your firewall
• You need the firewall to allow a listener on port 8080
  • You only need local access at the moment
  • You can allow access from 127.0.0.1 to port 8080
• Avoid port 80 (as you may find other processes competing for this one)
• You can use a different port if you have something else using 8080

Change doGet

Change the method doGet

• Your code will run in doGet

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  response.getWriter().println("Hello World");
}

• The stub is created by Eclipse - you can change the bit inside this method.

Run / Run on server

Right Click to Run on Server

• You can run on the server
• The output will show up in the crummy Eclipse browser
  • Look in Window / Web Browser to change this