Write a SERVLET program in java to accept details of student (SeatNo,
Stud_Name, Class, Total_Marks). Calculate percentage and grade obtained and display details on page.
StudentServlet.java
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("/StudentServlet")
public class StudentServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// Set response type
response.setContentType("text/html");
PrintWriter out = response.getWriter();
try {
// Read student details from form
String seatNo = request.getParameter("SeatNo");
String studName = request.getParameter("Stud_Name");
String studClass = request.getParameter("Class");
double totalMarks = Double.parseDouble(request.getParameter("Total_Marks"));
// Assuming total maximum marks is 500
double percentage = (totalMarks / 500) * 100;
// Calculate grade
String grade;
if (percentage >= 75)
grade = "A";
else if (percentage >= 60)
grade = "B";
else if (percentage >= 50)
grade = "C";
else if (percentage >= 35)
grade = "D";
else
grade = "F";
// Display student details
out.println("<html><body>");
out.println("<h2>Student Details</h2>");
out.println("<table border='1'>");
out.println("<tr><td>Seat No</td><td>" + seatNo + "</td></tr>");
out.println("<tr><td>Name</td><td>" + studName + "</td></tr>");
out.println("<tr><td>Class</td><td>" + studClass + "</td></tr>");
out.println("<tr><td>Total Marks</td><td>" + totalMarks + "</td></tr>");
out.println("<tr><td>Percentage</td><td>" + String.format("%.2f", percentage) + "%</td></tr>");
out.println("<tr><td>Grade</td><td>" + grade + "</td></tr>");
out.println("</table>");
out.println("</body></html>");
} catch (Exception e) {
out.println("<h3>Error: Please enter valid details!</h3>");
}
}
// Handle GET request to redirect to form
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.sendRedirect("student.html");
}
}
student.html (Form to accept student details)
<!DOCTYPE html>
<html>
<head>
<title>Student Details Form</title>
</head>
<body>
<h2>Enter Student Details</h2>
<form action="StudentServlet" method="post">
Seat No: <input type="text" name="SeatNo" required><br><br>
Name: <input type="text" name="Stud_Name" required><br><br>
Class: <input type="text" name="Class" required><br><br>
Total Marks: <input type="number" name="Total_Marks" required><br><br>
<input type="submit" value="Submit">
</form>
</body>
</html>