Creating a full production-ready ATM project involves several components, including servlets, JSP pages, database connectivity, and proper error handling. Below, I’ll provide a simplified version of each component along with code snippets. Please note that this is a basic example and may require further enhancement for a real-world production environment.
Database Configuration (DBUtil.java)
import java.sql.DriverManager;
import java.sql.SQLException;
public class DBUtil {
private static final String URL = “jdbc:mysql://localhost:3306/atm”;
private static final String USERNAME = “your_username”;
private static final String PASSWORD = “your_password”;
public static Connection getConnection() throws SQLException {
return DriverManager.getConnection(URL, USERNAME, PASSWORD);
}
}
LoginServlet.java
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
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 javax.servlet.http.HttpSession;
@WebServlet(“/login”)
public class LoginServlet extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String accountNumber = request.getParameter(“accountNumber”);
String pin = request.getParameter(“pin”);
try (Connection conn = DBUtil.getConnection()) {
String sql = “SELECT * FROM accounts WHERE account_number = ? AND pin = ?”;
try (PreparedStatement statement = conn.prepareStatement(sql)) {
statement.setString(1, accountNumber);
statement.setString(2, pin);
ResultSet resultSet = statement.executeQuery();
if (resultSet.next()) {
HttpSession session = request.getSession();
session.setAttribute(“accountNumber”, accountNumber);
response.sendRedirect(“dashboard.jsp”);
} else {
response.sendRedirect(“login.jsp?error=1”);
}
}
} catch (SQLException e) {
e.printStackTrace();
response.sendRedirect(“login.jsp?error=2”);
}
}
}
dashboard.jsp
<%@ page import=“java.sql.*” %>
<%@ page import=“javax.servlet.http.HttpSession” %>
<%@ page import=“DBUtil” %>
<!DOCTYPE html>
<html>
<head>
<meta charset=“UTF-8”>
<title>ATM Dashboard</title>
</head>
<body>
<h1>Welcome to ATM Dashboard</h1>
<%
HttpSession session = request.getSession();
String accountNumber = (String) session.getAttribute(“accountNumber”);
try {
Connection conn = DBUtil.getConnection();
String sql = “SELECT * FROM accounts WHERE account_number = ?”;
PreparedStatement statement = conn.prepareStatement(sql);
statement.setString(1, accountNumber);
ResultSet resultSet = statement.executeQuery();
if (resultSet.next()) {
out.println(“Account Number: “ + resultSet.getString(“account_number”) + “<br>“);
out.println(“Balance: $” + resultSet.getDouble(“balance“) + “<br>“);
}
} catch (SQLException e) {
e.printStackTrace();
out.println(“Error fetching account details.“);
}
%>
<a href=“logout.jsp”>Logout</a>
</body>
</html>
logout.jsp
<%@ page import=“javax.servlet.http.HttpSession” %>
<%
HttpSession session = request.getSession();
session.invalidate();
response.sendRedirect(“login.jsp”);
%>
login.jsp (with error handling)
<!DOCTYPE html>
<html>
<head>
<meta charset=“UTF-8”>
<title>Login</title>
</head>
<body>
<h1>Login</h1>
<%
String error = request.getParameter(“error”);
if (error != null && error.equals(“1”)) {
out.println(“<p style=‘color: red;‘>Invalid account number or PIN</p>“);
} else if (error != null && error.equals(“2“)) {
out.println(“<p style=‘color: red;‘>Database connection error</p>”);
}
%>
<form action=“login” method=“post”>
Account Number: <input type=“text” name=“accountNumber”><br>
PIN: <input type=“password” name=“pin”><br>
<input type=“submit” value=“Login”>
</form>
</body>
</html>
This is a basic setup for an ATM project using JSP and servlets. Make sure to handle exceptions, validate user inputs, and implement security measures before deploying this project into a production environment.
you can visit this github repo for source code – Source Code
