Untitled

// Un semplice servlet che elabora richieste get

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

public class WelcomeServlet extends HttpServlet{
    // Elabora richieste "get" dai client
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException
    {
        response.setContentType("text/html");
        PrintWriter out = response.getWriter();

    // Inizio documento XHTML
    out.println("<?xbl version = "1.0"?>");

    out.println("<!DOCTYPE html PUBLIC "-//W3C//DTD "+"XHTML 1.0 Strict//EN" "http://www.w3.org"+"/TR/xhtml1/DTD/xhtml1-strict.dtd">");
    out.println("<html xmlns = "http://www.w3.org/1999/xhtml">");

    // sezione head del docuento
    out.println("<head>");
    out.println("<title>A Simple Servlet Example</title>");
    out.println("</head>");

    // sezione body del documento
    out.println("<body>");
    out.println("<h1>Welcome to Servlets!</h1>");
    out.println("</body>");

    // fine documento XTHML
    out.println("</html>");
    out.close(); //close stream to complete the page
}
}

<?xml version = "1.0"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

<!-- Fig. 13.6: WelcomeServlet.html -->

<html xmlns = "http://www.w3.org/1999/xhtml">
<head>
    <title>Handling an HTTP Get Request</title>
</head>

<body>
    <form action = "/src/WelcomeServlet.java" method = "get"></form>

    <p><label>Click the button to invoke the servlet
            <input type = "submit" value = "Get HTML Document"/>
    </label></p>

    </form>
</body>
</html>