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Java servlet to check if the entered E-mail exists and the password of the E-mail is correct or not

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Here is the Java Source Code:-

import java.awt.image.*;
import java.io.*;
import java.nio.file.*;
import java.util.*;
import javax.imageio.*;
import javax.servlet.ServletException;
import javax.servlet.http.*;

public class Login extends HttpServlet {

    @Override
    public void service(HttpServletRequest req, HttpServletResponse res) throws IOException, ServletException {
        String email, password;
        email = req.getParameter("email");
        password = req.getParameter("password");
        if (!(email == null && password == null)) {
            login(email, password, req, res);
        }
    }

    private void login(String email, String password, HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {
        PrintWriter out = res.getWriter();
        boolean invalid = false;
        try {
            File acc = new File(System.getProperty("user.home"), "\\My Documents\\Accounts\\" + email.toLowerCase());
            File pas = new File(acc, "password.txt");
            BufferedReader buff = new BufferedReader(new FileReader(pas));
            String storedPassword = buff.readLine();
            if (storedPassword == null ? password == null : storedPassword.equals(password)) {
                logined(req, res, email);
            } else {
                invalid = true;
            }
        } catch (IOException e) {
            invalid = true;
        } finally {
            if (invalid == true) {
                Path uri = Paths.get("E:/NetBeans HTML/Servlets/ServletsExample/build/web/WEB-INF/Login Sign Up.html");
                Zucksnet ash = new Zucksnet("Zucksnet Style.css");
                out.println("<html>\n<head>");
                res.setContentType("text/css");
                out.println("<style>");
                String style[] = Zucksnet.getStyle();
                for (int i = 0; i < style.length; i++) {
                    out.println(style[i]);
                }
                out.println("</style>");
                out.println("<title>Login Failed!</title>\n</head>\n<body>");
                res.setContentType("text/html");
                out.println("Please Check Your Email or Password!");
                out.println("</body>\n</html>");
            }
        }
    }

    private void logined(HttpServletRequest req, HttpServletResponse res, String email) throws IOException {
        ImageServlet imageServlet = new ImageServlet();
        imageServlet.setName(email);
        PrintWriter out = res.getWriter();
        String pathToWeb = getServletContext().getRealPath(File.separator);
        Scanner scan;
        File file = new File(pathToWeb, "Zucksnet Style.css");
        scan = new Scanner(file);
        res.setContentType("text/html");
        out.println("<html>\n<head>\n<title>\nLogin\n</title>\n<style>");
        res.setContentType("text/css");
        while (scan.hasNextLine()) {
            out.println(scan.nextLine());
        }
        out.println("</style>");
        file = new File(pathToWeb, "home_script.txt");
        scan = new Scanner(file);
        while (scan.hasNextLine()) {
            out.println(scan.nextLine());
        }
        file = new File(pathToWeb, "head.txt");
        scan = new Scanner(file);
        res.setContentType("text/html");
        out.println("</head>\n<body id=\"homePage\" text=\"black\">");
        while (scan.hasNextLine()) {
            out.println(scan.nextLine());
        }
        out.println("<br><br>");
        file = new File(pathToWeb, "body.txt");
        scan = new Scanner(file);
        while (scan.hasNextLine()) {
            out.println(scan.nextLine());
        }
        out.println("</body>\n</html>");
    }
}



HTML Source Code:-


<!DOCTYPE html>
<html>
    <head>
        <title>Login</title>
    </head>
    <body id="mobile" style="text-align: left; background-color: #294a8f; font-family: sans-serif; color: white;" onload="links(); buttons(); mobiles(); dob();">
        <div align="left">
            <form method="post" action="http://localhost:8084/ServletsExample/build/web/WEB-INF/classes/Login">
                <table>
                    <tbody>
                        <tr>
                            <td><label for="email">E-mail</label></td><tr>
                            <td> <input name="email" type="email" id="email" autocomplete="off" placeholder="E-mail" autofocus style="font-kerning: auto; border-color: #294a8f; font-weight: bolder; background-color: #3B5998; color: white; text-spacing: none" size="32"/><tr>
                            <td><label for="password">Password</label></td><tr>
                            <td> <input name="password" type="password" id="password" autocomplete="off" placeholder="Password" style="font-kerning: auto; border-color: #294a8f; font-weight: bolder; background-color: #3B5998; color: white" size="32"/><tr>
                            <td><label for="remainLoggedIn" title="Remain Logged In on this Computer. Not recomonthended if using an shared Computer">
                                    <input type="checkbox" id="remainLoggedIn" title="Remain Logged In on this Computer. Not recomonthended if using an shared Computer" style="appearance: checkbox; background-color: #3B5998; color: white"/>Remember me?</label><tr>
                            <td><button title="Login to your account" type="submit" style="background-color: #294a8f; border-color: #2C4272; appearance: push-button; color: white;">Login</button>
                    </tbody>
                </table>
            </form>
    </div>
    </body>
</html>

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