Record is not Added in to the databse using Jsp Mysql

i am creating a simple crud using jsp mysql but record is not added in to the database.i tried this for 3 days but i couldn't solve the problem.i don't know what was a problem what i tried so far i attached below. Form design and Student.java class consist of all data and StudentDAO database is there add.jsp add the data in to the database.

Form

<div class="form-group" align="left">
                    <label class="form-label">Student Name</label>
                    <input type="text" class="form-control" placeholder="Student Name" id="stname" name="stname" size="30px" required>
                </div>
                <div class="form-group" align="left">
                    <label class="form-label">Course</label>
                    <input type="text" class="form-control" placeholder="Course" id="course" name="course" size="30px" required>
                </div>
                <div class="form-group" align="left">
                    <label class="form-label">Fee</label>
                    <input type="text" class="form-control" placeholder="Fee" id="fee" name="fee" size="30px" required>
                </div>

                  <div class="card" align="right">
                    <button type="button" class=" btn btn-info" id="save" onclick="addProject()">Registation
                    </button>
                    <button type="button" class="btn btn-warning" id="clear"   onclick="clear()">Close</button>
                </div>

Student.java

 public class Student {
        
        private String stname;
         private String course;
         private int fee;
    
        public Student(String stname, String course, int fee) {
            this.stname = stname;
            this.course = course;
            this.fee = fee;
        }
    
        public String getStname() {
            return stname;
        }
    
        public void setStname(String stname) {
            this.stname = stname;
        }
    
        public String getCourse() {
            return course;
        }
    
        public void setCourse(String course) {
            this.course = course;
        }
    
        public int getFee() {
            return fee;
        }
    
        public void setFee(int fee) {
            this.fee = fee;
        }

StudentDAO.java

public class StudentDAO {
    
    Connection connection;
    PreparedStatement pst;
    
	public StudentDAO() {
		String jdbcURL = "jdbc:mysql://localhost/studcrud";
		String dbUser = "root";
		String dbPassword = "";
		try {
			Class.forName("com.mysql.jdbc.Driver");
			connection = DriverManager.getConnection(jdbcURL, dbUser, dbPassword);
		}
		catch(Exception ex){
			ex.printStackTrace();
		}
	}
public int insertUser(Student stud) throws SQLException, 
	    ClassNotFoundException {

		String sql = "insert into records(name,course,fee)values(?,?,?)";
		PreparedStatement statement = connection.prepareStatement(sql);
		statement.setString(1, stud.getStname());
		statement.setString(2, stud.getCourse());
                statement.setInt(3, stud.getFee());
               
                 int row=  statement.executeUpdate();
                 return row;
	}

Add.jsp

<%@page import="org.json.simple.JSONArray"%>
<%@page import="org.json.simple.JSONObject"%>
<%@page import="java.sql.*" %>
<%@page contentType="text/html" pageEncoding="UTF-8"%>


        <%
 
       String stname = request.getParameter("stname");
       String course = request.getParameter("course");
       int  fee = Integer.parseInt(request.getParameter("fee"));
       
       //fill it up in a Student Bean
       Student stud = new Student(stname,course,fee);
    
       
       StudentDAO stu = new StudentDAO();
       int rows = stu.insertUser(stud); 
        
      String message;
      
      
      if(rows==0)
      {
           message = "success";
      
      }
      else
      {
          message = "Failed";
      }