import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Enumeration;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@WebServlet("/SampleServlet")
public class SampleServlet extends HttpServlet {
    final public static long serialVersionUID = 1024L;
    
    @Override
    public void init(ServletConfig config) throws ServletException {
        super.init(config);
    }

    @Override
    public void destroy() {
    }      

    @Override
    public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        ArrayList<String> values = new ArrayList<>();
        Enumeration parameters = request.getParameterNames();     
        while(parameters.hasMoreElements()) {
            String parameter = (String)parameters.nextElement();
            if (parameter.contains("..."))
                values.add(request.getParameter(parameter)));
        }
        response.setContentType("text/html");        
        PrintWriter printWriter = new PrintWriter(response.getWriter());     
        displayForm(printWriter);
        printWriter.close();
    }
    
    @Override
    public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // ...
    }      	 
}