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";
 		ServletOutputStream out = res.getOutputStream();
		out.println("Hello, " + name + "!");
This code responds to an invocation of the form

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