doGet and doPost in Servlets

doGet and doPost are methods of the javax.servlet.http.HttpServlet class that are used to handle HTTP GET and POST requests, respectively.

The doGet method is called by the server (via the service method) when the client requests a GET request. It is used to retrieve information from the server.

The doPost method is called by the server (via the service method) when the client requests a POST request. It is used to send information to the server.

Here is an example of how to override the doGet and doPost methods in a servlet:

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;

public class MyServlet extends HttpServlet {

  @Override
  protected void doGet(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {
    // handle GET request
  }

  @Override
  protected void doPost(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {
    // handle POST request
  }
}

In the doGet method, you can use the request object to get the parameters of the GET request and the response object to set the response to the client.

In the doPost method, you can use the request object to get the parameters of the POST request and the response object to set the response to the client.

You can use the doGet and doPost methods to implement different functionality for GET and POST requests in your servlet.