Java tutorial
import java.io.IOException; import java.io.PrintWriter; import java.util.Enumeration; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public class Main extends HttpServlet { protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html;charset=UTF-8"); PrintWriter out = response.getWriter(); Enumeration en = request.getParameterNames(); while (en.hasMoreElements()) { String paramName = (String) en.nextElement(); out.println(paramName + " = " + request.getParameter(paramName) + "<br/>"); } } }