JSP Form Example

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Creating forms in JSP (JavaServer Pages) is a common task for collecting user inputs and processing them on the server side. In this example, we'll create a simple JSP form for user registration, including fields for username, password, and email. We'll also show how to handle the form submission and validate the input data using a servlet.

Prerequisites

Before starting, ensure you have a basic understanding of JSP, servlets, and a Java web application development environment set up.

Project Structure

jsp-form-example/
├── src/
│   ├── main/
│   │   ├── java/
│   │   │   └── com/
│   │   │       └── example/
│   │   │           └── servlet/
│   │   │               └── RegisterServlet.java
│   │   ├── resources/
│   │   └── webapp/
│   │       ├── index.jsp
│   │       └── WEB-INF/
│   │           └── web.xml
└── pom.xml

Dependencies

Add the following dependencies to your pom.xml file to use the latest versions of JSP and servlet APIs:

<dependency>
    <groupId>jakarta.servlet</groupId>
    <artifactId>jakarta.servlet-api</artifactId>
    <version>6.1.0</version>
    <scope>provided</scope>
</dependency>
<dependency>
    <groupId>jakarta.servlet.jsp.jstl</groupId>
    <artifactId>jakarta.servlet.jsp.jstl-api</artifactId>
    <version>3.0.0</version>
</dependency>

JSP Form

Create an index.jsp file with the following content:

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<!DOCTYPE html>
<html>
<head>
    <title>User Registration</title>
</head>
<body>
    <h2>User Registration Form</h2>
    <form action="register" method="post">
        <label for="username">Username:</label>
        <input type="text" id="username" name="username" required><br><br>
        
        <label for="password">Password:</label>
        <input type="password" id="password" name="password" required><br><br>
        
        <label for="email">Email:</label>
        <input type="email" id="email" name="email" required><br><br>
        
        <input type="submit" value="Register">
    </form>
</body>
</html>

Servlet to Handle Form Submission

Create a servlet named RegisterServlet.java to handle the form submission:

package com.example.servlet;

import jakarta.servlet.ServletException;
import jakarta.servlet.annotation.WebServlet;
import jakarta.servlet.http.HttpServlet;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;

import java.io.IOException;
import java.io.PrintWriter;

@WebServlet("/register")
public class RegisterServlet extends HttpServlet {

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // Retrieve form data
        String username = request.getParameter("username");
        String password = request.getParameter("password");
        String email = request.getParameter("email");

        // Validate and process the form data
        // For simplicity, just display the data in the response
        response.setContentType("text/html");
        PrintWriter out = response.getWriter();
        out.println("<html><body>");
        out.println("<h2>Registration Successful</h2>");
        out.println("<p>Username: " + username + "</p>");
        out.println("<p>Email: " + email + "</p>");
        out.println("</body></html>");
    }
}

Configuration

Configure the servlet in the web.xml file:

<web-app xmlns="https://jakarta.ee/xml/ns/jakartaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="https://jakarta.ee/xml/ns/jakartaee https://jakarta.ee/xml/ns/jakartaee/web-app_6_0.xsd" version="6.0">
    <servlet>
        <servlet-name>RegisterServlet</servlet-name>
        <servlet-class>com.example.servlet.RegisterServlet</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>RegisterServlet</servlet-name>
        <url-pattern>/register</url-pattern>
    </servlet-mapping>
</web-app>

Running the Application

Build and deploy the project to your web server (e.g., Apache Tomcat).
Access the form by navigating to http://localhost:8080/jsp-form-example/index.jsp.
Fill out the form and submit it. You should see a confirmation page displaying the submitted data.

Summary

This tutorial demonstrated how to create a simple JSP form, handle form submission using a servlet, and validate the input data. By following these steps, you can build more complex forms and handle various types of user input in your web applications.

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JSP Form Example

Prerequisites

Project Structure

Dependencies

JSP Form

Servlet to Handle Form Submission

Configuration

Running the Application

Summary

My Top and Bestseller Udemy Courses. The sale is going on with a 70 - 80% discount. The discount coupon has been added to each course below:

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JSP Form Example

Prerequisites

Project Structure

Dependencies

JSP Form

Servlet to Handle Form Submission

Configuration

Running the Application

Summary

My Top and Bestseller Udemy Courses. The sale is going on with a 70 - 80% discount. The discount coupon has been added to each course below:

Build REST APIs with Spring Boot 4, Spring Security 7, and JWT

[NEW] Learn Apache Maven with IntelliJ IDEA and Java 25

ChatGPT + Generative AI + Prompt Engineering for Beginners

Spring 7 and Spring Boot 4 for Beginners (Includes 8 Projects)

Building Real-Time REST APIs with Spring Boot - Blog App

Building Microservices with Spring Boot and Spring Cloud

Java Full-Stack Developer Course with Spring Boot and React JS

Build 5 Spring Boot Projects with Java: Line-by-Line Coding

Testing Spring Boot Application with JUnit and Mockito

Spring Boot Thymeleaf Real-Time Web Application - Blog App

Master Spring Data JPA with Hibernate

Spring Boot + Apache Kafka Course - The Practical Guide

Java Testing: Mastering JUnit 5 Framework

Reactive Programming in Java: Spring WebFlux and Testing

Spring Boot + RabbitMQ Course - The Practical Guide

Functional Programming in Java (Includes Java Collections)

ChatGPT for Java Developers: Boost Your Productivity with AI

Comments

Post a Comment

Spring Boot 3 Paid Course Published for Free on my Java Guides YouTube Channel

Spring Boot 3 Paid Course Published for Free
on my Java Guides YouTube Channel