What is the HelloWorld Servlet?

Alex Chaffee


import javax.servlet.*; 
import javax.servlet.http.*; 
import java.io.*;

public class HelloHttpServlet extends HttpServlet
{
    public void doGet(HttpServletRequest req, HttpServletResponse res)
 	throws IOException, ServletException
    {
 		String name = req.getParameter("name");
 		if (name == null) name = "Joe";
 		res.setContentType("text/plain");
 		ServletOutputStream out = res.getOutputStream();
		out.println("Hello, " + name + "!");
    }
}
This code responds to an invocation of the form

http://myserver.foo.com/servlet/HelloHttpServlet?name=Fred
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