Wednesday, November 23, 2011

Get Started with JDBC Basic First

If you are looking for working on some pieces of java code and jdbc driver using mysql. Your are on right blog. You just need to configure some of the factor before you start coding.

Tools Needed

1. Eclipse IDE

2. MySQL installed.
  • Leave mysql default port to 3306 and setup username and password which is required in files where we indicate the database connections configurations
  • Create Database called studentdb and create table called employee.
  • In employee table with column id, name and salary insert some data into it.
3. Go to and download mysql-connector-java-5.1.16-bin.jar , jar need to be added into project build path.

Lets Start simple Java

  1. Create Java Project using eclipse IDE. I hope you will understand what is java project, dynamic project and maven projects or ejb project. so simply create java projects.

    JDBC simple java project
2. Create package in src called com.vastik.jdbc and Create javabean (by definitons should have constructor and setter/getter) called Employee.

package com.vastika.jdbc;

public class Employee {

 private int ID;
 private String Name;
 private int Salary;

 public int getID() {
  return ID;

 public void setID(int iD) {
  ID = iD;

 public String getName() {
  return Name;

 public void setName(String name) {
  Name = name;

 public int getSalary() {
  return Salary;

 public void setSalary(int salary) {
  Salary = salary;

 public String toString() {
  return "EmployeeID=" + ID + "\tName=" + Name + "\tSalary=" + Salary;



3. Create DAO layer that actually deal with database connections and CRUD operations i.e.
create,              update, retrieve and delete.

package com.vastika.jdbc;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;

public class MyDAO {

 private final String SELECT_ALL = "SELECT * FROM employee";

  * Create getConnection Method which will allows in establishing the
  * connection to database prior to any CRUD operations. i.e. Create,
  * Retrieve, Update or Delete.
  * */
 public Connection getConnetion() {

  Connection conn = null;
  String url = "jdbc:mysql://localhost:3306/";
  String db = "studentdb";
  String driver = "com.mysql.jdbc.Driver";
  String username = "root";
  String password = "test";

  try {

    * registering with the driver with local mysql host
   conn = DriverManager.getConnection(url + db, username, password);


  catch (SQLException e1) {

   System.out.println("Not Connected check the try block!!!");

  catch (ClassNotFoundException e2) {


  return conn;


  * This getAllEmployee method will first call the getConnection Method to
  * get connection to DB, and then fetch the data from database and sets this
  * each rows values into each instance of employee object's instance
  * variable. And returns List of employee. 
  * */
 List getAllEmployee() {

  Connection conn = getConnetion();
  List emplList = new ArrayList();

  try {
   Statement stmt = conn.createStatement();
   ResultSet rs = stmt.executeQuery(SELECT_ALL);
   while ( {
    Employee emp = new Employee();
  catch (SQLException e) {
  return emplList;

4. Make sure your mysql is up and running. Now create Driver class that fetch the data from database and display in the console.

package com.vastika.jdbc;

import java.util.List;

public class Drive {

  * @param args
 public static void main(String[] args) {

  System.out.println("Lets connect to database");
  // creating myDAO
  MyDAO listEmp = new MyDAO();
  List list1 = listEmp.getAllEmployee();

  for (Employee emp : list1) {



Hope you will enjoy this basic of all.

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