Certainly! Below is an example of a Java program using Hibernate annotations to store student details in a database. Make sure you have Hibernate and a JDBC driver for your database configured in your project.

import javax.persistence.*;

@Entity
@Table(name = "student")
public class Student {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "id")
    private int id;

    @Column(name = "name")
    private String name;

    @Column(name = "roll_number")
    private int rollNumber;

    @Column(name = "department")
    private String department;

    // Constructors, getters, and setters
}

To save the Student details in the database using Hibernate, you can use the following code in your main program:

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;

public class Main {
    public static void main(String[] args) {
        // Create and configure the Hibernate SessionFactory
        Configuration configuration = new Configuration().configure("hibernate.cfg.xml");
        SessionFactory sessionFactory = configuration.buildSessionFactory();

        // Create a new student
        Student student = new Student();
        student.setName("John Doe");
        student.setRollNumber(101);
        student.setDepartment("Computer Science");

        // Open a new session
        Session session = sessionFactory.openSession();
        Transaction transaction = session.beginTransaction();

        // Save the student
        session.save(student);

        // Commit the transaction
        transaction.commit();

        // Close the session and the session factory
        session.close();
        sessionFactory.close();
    }
}

Remember to replace "hibernate.cfg.xml" with the actual name of your Hibernate configuration file, and ensure that it is properly configured with your database connection details.

This example outlines the basics of using Hibernate to store student details in a database using annotations. You can expand upon this to include additional functionality as needed.

Certainly! Below is an example of a Java program that uses JDBC and PreparedStatement to insert employee into a database.

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;

public class Employee {
    static final String JDBC_DRIVER = "yourJDBCDriver";
    final String DB_URL = "yourDBURL";
    static final String USER = "yourUsername";
    static final String PASS = "yourPassword";

    public static void main(String[] args) {
        Connection conn = null;
        PreparedStatement stmt = null;

        try {
            // Register JDBC driver
            Class.forName(JDBC_DRIVER);

            // Open a connection
            System.out.println("Connecting to database...");
            conn = DriverManager.getConnection(DB_URL, USER, PASS);

            // Create SQL query
            String sql = "INSERT INTO employee (id, name, dept, address) VALUES (?, ?, ?)";

            // Create PreparedStatement
            stmt = conn(sql);

            // Set parameters
            stmt.setInt(1, 101); // id
            stmt.setString(2, "John Doe // name
            stmt.setString(3, "IT"); // dept
            stmt.setString(4, "123 Main St, City"); // address

 // Execute the query
            stmt.executeUpdate();
            System.out.println("Employee details inserted into the database.");

        catch (SQLException se) {
            // Handle errors for JDBC
            se.printStackTrace();
        } catch (Exception e) {
            // Handle errors for Class.forName
            e.printStackTrace();
        } finally {
            // Finally block to close resources
            try {
                if (stmt != null) {
                    stmt.close();
                }
            } catch (SQLException se2) {
            } // nothing we can do
            {
                if (conn != null) {
                    conn.close();
                }
            } catch (SQLException se) {
                se.printStackTrace();
            } end finally try
        }
    }
}

In this example, replace "yourDBCDriver", "yourDBURL", "yourUsername", and "yourPassword with your actual database connection details. Also, ensure that you have the appropriate JDBC driver for your database configured in your project.

The program connects to the database, prepares an SQL INSERT statement using a PreparedStatement, sets the parameters, and then executes the query to insert the employee details into the database.

Please make sure to handle exceptions and close resources properly in a production environment.

Certainly! Below is an example of a Java program using Servlet and JSP to pass employee details like (eid, ename, edept, es) to the database.

First, create a JSP page "employeeForm.jsp" to collect employee details:

<%@ page language="java" contentTypetext/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
>
    <meta charset="UTF-8">
    <>Employee Form</title>
</head>
<body>
    <form action="EmployeeServlet" method="post">
        Employee ID: <input type="text" name="eid"><br>
        Employee Name:input type="text" name="ename"><br>
        Employee Department: <input type="text" name="edept"><>
        Employee Salary: <input type="text" nameesalary"><br>
        <input type="submit" value="Submit">
    </form>
</body>
</html>
``Next, create a Servlet "EmployeeServlet.java" to handle form submission and insert the data into the database:

```java
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse@WebServlet("/EmployeeServlet")
public class EmployeeServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;

    // Database configuration
    static final String JDBC_DRIVER = "yourJDBCDriver";
    final String DB_URL = "yourURL";
    static final String USER = "yourUsername";
    static final String PASS = "yourPassword";

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, {
        response.setContentType("text/html");
        PrintWriter out = response.getWriter();

        // Get parameters the form
        int eid = Integer.parseInt(request.getParameter("eid"));
        String ename = request.getParameter("ename");
        String edept = request.getParameter("edept");
        double esalary = Double.parseDouble(request.getParameter("esalary"));

        // JDBC code to insert data into the database
        Connection conn = null;
        PreparedStatement stmt = null;
        try {
            // Register JDBC driver
            Class.forName(JDBC_DRIVER);

            Open a connection
            System.out.println("Connecting to database...");
            conn = DriverManager.getConnection_URL, USER, PASS);

            // Create SQL query
 String sql = "INSERT INTO employee (eid, ename, edept, esalary) (?, ?, ?, ?)";

            // Create PreparedStatement
            stmt conn.prepareStatement(sql);
            stmt.setInt(1, eid);
            stmt.setString(2, ename);
            stmt.setString(3, edept);
            stmt.setDouble(4, esalary);

            // Execute the query
            stmt.executeUpdate();
            out("Employee details inserted into the database.");

        } catch (SQLException se) {
            // Handle errors for JDBC
            se.printStackTrace            // If needed, redirect to an error page
        } catch (Exception e) {
            Handle errors for Class.forName
            e.printStackTrace();
        } {
            // Finally block to close resources
            try {
                if (stmt != null) {
                    stmt.close();
                }
            } catch (SQLException se2) {
            } // nothing we can do
            {
                try {
 if (conn != null) {
                        conn.close();
                    }
                } catch (SQLException se)                    se.printStackTrace();
                }
            } // end finally try
        }
    }
}

Ensure you replace "JDBCDriver", "yourDBURL", "yourUsername", and "your" with your actual database connection details in the above servlet.

This example outlines a basic setup to handle the form submission using a Servlet and JSP and insert the employee details into the database using JDBC. Additional error handling and best practices for environments should be considered.

Certainly! Below is a basic example of a Java program using Servlet and JSP to fetch the student's username and password and show page for confirmation login:

First, create a JSP page "loginForm.jsp to collect the student's username and password:

%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
    <title Form</title>
</head>
<body>
    <form action="Servlet" method="post">
        Username: <input type="text" nameusername"><br>
        Password: <input type="password name="password"><br>
        <input type="submit" value="Login">
    </form>
</body>
html>

Next, create a Servlet "LoginServlet.java" to handle form submission and validate the login credentials. If the login is successful, forward the request to a confirmation page:

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@WebServlet("/LoginServlet")
 class LoginServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;

    protected void doPost(HttpServletRequest, HttpServletResponse response) throws ServletException, IOException {
        // Get username and password from the form
        String username = request.getParameter("username");
        password = request.getParameter("password");

        // Check the username and password (You should validate credentials against a database in a real-world scenario)

        if (username.equals("exampleUser") && password.equals("examplePassword")) {
            // If the credentials are valid, forward to the confirmation page
            request.getRequestDispatcher("confirmationPage.jsp").forward(request, response);
 } else {
            // If the credentials are invalid, show an error message
            PrintWriter out = response.getWriter();
            out.println("Invalid username or password. try again.");
        }
    }
}

Create a JSP page "confirmationPage.jsp" to display the confirmation after successful login:

<!DOCTYPE html>
<html>
<head>
    <title>Login Confirmation</title>
</head>
<body>
   h2>Login Successful!</h2>
    <p>Welcome, ${.username}!</p>
</body>
</html>
``In this example, when the user logs in with the correct credentials, they will be forwarded to the "confirmationPage.jsp" displaying a welcome message.

Please note that in a real-world scenario, you should validate the login credentials against a database and handle passwords securely.