Am getting the following error while running the servlet example

Question

Hi,
am getting the following error while running the servlet example
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
java.lang.NullPointerException
     edu.dao.StudentDao.insertStudent(StudentDao.java:18)
     edu.servlet.StudentServlet.doGet(StudentServlet.java:25)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
note The full stack trace of the root cause is available in the Apache Tomcat/5.5.20 logs.
Thanks
//sreekanth

Answer 1

Hi,
the following code i have written in StudentDao
package edu.dao;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import org.apache.commons.dbutils.DbUtils;
import edu.model.Student;
import edu.util.DBUtil;
public class StudentDao {
     public void insertStudent(Student student) {
          String stuQuery = "INSERT INTO STUDENT VALUES(?,?)";
          Connection connection = DBUtil.getConnection();
          PreparedStatement preparedStatement = null;
          try {
               preparedStatement = connection.prepareStatement(stuQuery);
               preparedStatement.setString(1,student.getStudentNo());
               preparedStatement.setString(2, student.getStudentName());
               preparedStatement.executeUpdate();
          } catch(SQLException e){
               System.out.println("..Sql exception......");
          }finally {
               DbUtils.closeQuietly(connection,preparedStatement,null);
}