Java Servlet is a Java class used to build dynamic web pages and serves as a bridge between the client and the server. How it works: Receives a request, initializes the Servlet, processes the request, generates a response and closes the Servlet. Pros: Portable, scalable, secure and easy to use. Disadvantages: Overhead, coupling, and state management. Practical case: Create a simple Servlet to display the "Hello, Servlet!" message.
Introduction
Java Servlet is a Classes in the Java programming language that can be used to build dynamic web pages. It acts as a bridge between client and server for handling HTTP requests and responses.
Working principle
init()
method. doGet()
or doPost()
method to process ask. PrintWriter
or other output mechanism to generate an HTTP response. destroy()
method to close it. Advantages
Disadvantages
Practical case
The following is a simple Servlet example, written in Java:
import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; @WebServlet("/hello") public class HelloServlet extends HttpServlet { @Override public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html"); response.getWriter().write("<h1>Hello, Servlet!</h1>"); } }
By running a Web server (such as Tomcat) You can test this example by configuring the servlet on the servlet and accessing the "/hello" URL.
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