import javax.servlet.*; import javax.servlet.http.*; import java.io.IOException; import java.io.PrintWriter; /** * First sample servlet. Returns any parameters and * lists server properties. */ public class Properties extends HttpServlet { public void init(ServletConfig config) throws ServletException { // Initialize the servlet here. super.init(config); } public void destroy() { // Clean up here } public void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { // Get an output stream that takes into account // the proper character encoding PrintWriter out = resp.getWriter(); // Print the HTML header to the output stream out.println(""); out.println(""); out.println("My First Servlet"); out.println(""); out.println("

"); out.println("Information About You

"); out.println("
"); // Create a table with information about the client out.println("
"); out.println(""); out.println(""); out.println(""); out.println(""); out.println(""); out.println(""); out.println(""); out.println(""); out.println(""); out.println(""); out.println(""); out.println(""); out.println(""); out.println(""); out.println(""); out.println(""); // Get and dump all of the request parameters java.util.Enumeration enum = req.getParameterNames(); while (enum.hasMoreElements()) { String name = (String) enum.nextElement(); out.println(""); out.println(""); out.println(""); out.println(""); } out.println("
Method" + req.getMethod() + "
User" + req.getRemoteUser() + "
Client" + req.getRemoteHost() + "
Protocol" + req.getProtocol() + "
Parameter '" + name + "'" + req.getParameter(name) + "


"); // Create a table with information about the server out.println("

"); out.println("Server Properties

"); out.println("
"); out.println("
"); java.util.Properties props = System.getProperties(); enum = props.propertyNames(); while (enum.hasMoreElements()) { String name = (String) enum.nextElement(); out.println(""); out.println(""); out.println(""); out.println(""); } out.println("
" + name + "" + props.getProperty(name) + "
"); // Wrap up out.println(""); out.flush(); } }