Name List - JSP

Name List - JSP

September 11, 2021

example java server servlets post jsp

This example uses an HTML form to create a POST request containing the user’s name, and then uses JSP to show a list of all of the entered names.

index.html contains an HTML form:

<!DOCTYPE html>
    <title>Name Form</title>
    <h1>What's your name?</h1>

    <form action="/post-name-list-jsp/names" method="POST">
      <input type="text" name="name" value="Ada">
      <input type="submit" value="Submit">


    <p>Click <a href="/post-name-list-jsp/names">here</a> to see everybody's name.</p>
</html> handles the POST request by outputting the user’s name to the response. The servlet also handles GET requests to the /names URL, which it handles by adding the list of names to the request and forwarding the request to name-list.jsp.

package io.happycoding.servlets;

import java.util.ArrayList;
import java.util.List;
import jakarta.servlet.annotation.WebServlet;
import jakarta.servlet.http.HttpServlet;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import jakarta.servlet.ServletException;

public class NamesServlet extends HttpServlet {

  List<String> names = new ArrayList<>();

  public void doGet(HttpServletRequest request, HttpServletResponse response)
      throws IOException, ServletException {

    request.setAttribute("names", names);

  public void doPost(HttpServletRequest request, HttpServletResponse response)
      throws IOException {

    String name = request.getParameter("name");

name-list.jsp renders an HTML page by iterating over every name in the list.

<%@ page import="java.util.List" %>
<!DOCTYPE html>
    <title>Name List</title>
    <h1>Name List</h1>

      <% List<String> names = (List<String>) request.getAttribute("names"); %>
      <% for (String name : names) { %>
        <li><%= name %></li>
      <% } %>

    <p>Click <a href="/post-name-list-jsp/index.html">here</a> to enter another name.</p>

name form

hello Ada

name list

Post Requests Examples


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