Updated February 20, 2023
Introduction to Servlet JSP
Servlet Java Server Pages (JSP) is a server-side technology that lets you build dynamic web applications that work on any platform. Servlet and JSP can use all Java APIs, including the JDBC API, which lets them connect to enterprise databases. JSP makes it easy to build web applications in simple steps.
Key Takeaways
- Servlet Extension: Servlet technology is built on JSP technology. You can use all of Servlet’s features in JSP.
- Simple to Maintain: You can easily separate our business logic from our presentation logic in JSP, which makes it easy to manage. In Servlet technology, the business and presentation logic are mixed.
- Fast Development: You don’t have to recompile and redeploy the project if a JSP page is changed. If you want to change how the application looks and works, you need to update and recompile the Servlet code.
- Minimal Code than the Servlet: In JSP, you can shorten the code using action tags, JSTL, custom tags, etc. You can also use EL, implicit objects, and other things.
What is Servlet JSP?
Java Server Pages or JSP is a platform used to make web software, just like Servlet advanced technologies.
It is an extended version of Servlet because it has more features than a servlet, such as expression language, JSTL, etc. A JSP page consists of both HTML tags as well as JSP tags. The JSP pages are easier to keep up with than the Servlet pages because you can keep developing and designing separately.
How to Create Servlet JSP Web Application?
The JSP technology creates web applications using input and output pages with the HTTP server. The request and response of the server pages work efficiently with the Servlet JSP procedure.
Create an index.html page to display an interactive user form.
Filename: index.html
Code:
<form action = "output">
<input type = "text" name = "names">
<input type = "submit" value = "save">
<br/>
</form>Use the web.xml file with the required data.
Filename: web.xml
Code:
<web-app>
<servlet>
<servlet-name> educba </servlet-name>
<jsp-file> /output.jsp </jsp-file>
</servlet>
<servlet-mapping>
<servlet-name> educba </servlet-name>
<url-pattern> /output </url-pattern>
</servlet-mapping>
<context-param>
<param-name> driver_names </param-name>
<param-value>
sun.jdbc.odbc.JdbcOdbcDriver
</param-value>
</context-param>
</web-app>Use the JSP file to display output and connect with the HTTP server.
Filename: output.jsp
Code:
<%
out.print("Hello "+request.getParameter("names"));
String driveres = application.getInitParameter("driver_name");
out.print(" Given Database Driver name is = " +driveres);
%>Servlet JSP Web & HTTP
Given below is the JSP Web and HTTP:
1. Servlet JSP Web
- The web is a network of servers on the Internet that lets configured documents work. It’s a type of markup language that is utilized to format documents. It lets you link to other documents like graphics, audio, video files, etc.
- A website is a group of files that don’t change, such as HTML pages, images, graphics, etc.
- The Web application is a webpage that runs on a server and has dynamic features. The web application works on Google, Facebook, and Twitter.
2. Servlet JSP HTTP (Hypertext Transfer Protocol)
- HTTP is how web servers and clients talk between themselves. It is a stateless protocol because each connection can only handle one request. With HTTP, clients communicate with the server to send requests and then deactivate.
- This system allows more people to connect to a server over time. In this case, the client sends an HTTP request, and the server sends an HTML page back to the client. Both of these steps use HTTP.
Servlet JSP Tools
There are some tools used in the JSP application:
- JDK (Java Development Kit)
- Apache Tomcat
- IDE (Eclipse or Notepad)
- Maven
1. JDK (Java Development Kit)
The Java Development Kit (JDK) is an environment for software development used to make Java programs and web applications. It comes with the Runtime Environment (JRE), a java interpreter/loader, a java compiler (javac), a documentation generator (Javadoc), an archiver (jar), and other tools needed for Java web development.
2. Apache Tomcat
Apache Tomcat is an open-source and free program for the Jakarta Servlet page, Jakarta Expression Language, and WebSocket technologies. Tomcat gives you an HTTP web server environment and runs Java code.
3. IDE (Eclipse or Notepad)
Tools that come with an IDE include a text editor, a toolbar, a project editor, and an output viewer. IDEs can do many different things. Some important ones are writing, debugging, compiling, and evaluating resources. Eclipse, NetBeans, and Visual Studio are all examples of IDEs.
4. Maven
Maven is an automation platform for building projects primarily used for Java projects. You can also build and run projects with Maven. It works with JSP technology to create applications easily.
FAQ
Given below are the FAQs mentioned:
Q1. Can I learn JSP without learning Servlet?
Answer: Yes, you can. But as your projects get more complicated, you’ll find that Servlets are the best way to handle the processing because they are made for it. You could drive simple web apps with just JSP.
Q2. Can JSP be used with Servlet?
Answer: In this mode, servlets are used for processing tasks, and JSP pages are used for the presentation layer. The Servlet is a controller in charge of handling requests and making any beans that the JSP page needs. The controller is also in the task of choosing which JSP page the request should be sent to.
Q3. Is JSP, as well as Servlet, the same?
Answer: All kinds of protocol requests can be sent and managed by Servlets. On the other hand, an HTTP request is the only thing that works with JSP. By default, session management is not turned on in Servlet. The user must turn it on. On the other hand, session management has been turned on in JSP.
Conclusion
It is server-side technology to create a dynamic web application. The JSP uses servlet technology to create a complex and large-size application. It is easy, simple for developers to develop applications and user-friendly for users.
Recommended Articles
This is a guide to Servlet JSP. Here we discuss the introduction, and how to create servlet JSP web application, tools, and FAQ. You may also have a look at the following articles to learn more –
