ServletBC.java

import java.io.IOException;
import java.sql.*;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Servlet implementation class ServletBC
 */
@WebServlet("/ServletBC")
public class ServletBC extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public ServletBC() {
        super();
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		try {
			
			Class.forName("com.mysql.jdbc.Driver");
			Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/stud", "root", "");
			Statement stmt = con.createStatement();
			ResultSet rs = stmt.executeQuery("SELECT * FROM STUDENT WHERE USN='"+request.getParameter("usn")+"'");
			while(rs.next()) {
				System.out.println(rs.getInt(1) + " " + rs.getString(2));
			}
			
		} catch (Exception e) {
			// TODO: handle exception
		}
	}

}