To include JSP Page in Servlet we can use the following code.
Let suppose we have a JSP page in a project directory path “jsppage/newjsp.jsp”

request.getRequestDispatcher("jsp page path").include(request, response);

now to include it we write the following code in servlet.

Servlet Code

import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/* @author Sumit */
public class MyServlet extends HttpServlet {

    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try {

//to include jsp page in servlet 
               request.getRequestDispatcher("/jspPages/newjsp.jsp").include(request, response);
               out.print("Login Successful");
        } catch (Exception e) {
            e.printStackTrace();

        } finally {
            out.close();
        }
    }

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    @Override
    public String getServletInfo() {
        return "Short description";
    }
}

JSP Code:

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>JSP Page</title>
    </head>
    <body>
        <h1>Hello NEW JSP!</h1>
    </body>
</html>

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