This java JDBC will teach you how to do basic database functions that are CREATE RETIEVE UPDATE and DELETE in Eclipse. using Mysql Database. The INSERT, SELECT, UPDATE and DELETE statements can be used in any database system, because this is support by all relational database systems.
The tutorial you learn java mysql crud operation step by step. Crud operations are must when you developing a java mini projects. learn how to INSERT, SELECT, UPDATE and DELETE in database by writing code to manage the book table in the database named javacrud. book table consist of following columns name,edition,price.
we will do the java best practice for understand java programming clearly and easily.
Feature of projects
The system shall be able to record Book details : name,edition,price. The system shall be able to retrieve the Book details : name,edition,price. Then system shall be able to Edit and Delete the Book details : name,edition,price.
Learn how to make this System Step by step
Step 1: Download JDK Click here follow the steps and install it. Step 2: Download an appropriate jdbc driver Click here in order to connect jdbc and mysql. Establish the database connection
Connection con;
PreparedStatement pst;
ResultSet rs;
public void Connect()
{
try {
Class.forName("com.mysql.jdbc.Driver");
con = DriverManager.getConnection("jdbc:mysql://localhost/javacrud", "root","");
}
catch (ClassNotFoundException ex)
{
ex.printStackTrace();
}
catch (SQLException ex)
{
ex.printStackTrace();
}
}
AddRecords
you can use the following code snippet to add the records in to database. paste the code inside the add button
public void actionPerformed(ActionEvent e)
{
String bname,edition,price;
bname = txtbname.getText();
edition = txtedition.getText();
price = txtprice.getText();
try {
pst = con.prepareStatement("insert into book(name,edition,price)values(?,?,?)");
pst.setString(1, bname);
pst.setString(2, edition);
pst.setString(3, price);
pst.executeUpdate();
JOptionPane.showMessageDialog(null, "Record Addedddd!!!!!");
table_load();
txtbname.setText("");
txtedition.setText("");
txtprice.setText("");
txtbname.requestFocus();
}
catch (SQLException e1)
{
e1.printStackTrace();
}
}View Records
you can use the following code snippet to retrieve the data stored in the database and present it to users in a proper format. create a method table_load() .paste the method inside the constructor of the class.when the form is loaded all the records will be shown on the jTable.
public void table_load()
{
try
{
pst = con.prepareStatement("select * from book");
rs = pst.executeQuery();
table.setModel(DbUtils.resultSetToTableModel(rs));
}
catch (SQLException e)
{
e.printStackTrace();
}
}Form Constructor
public JavaCrud() {
initialize();
Connect();
table_load();
}Search Records
Enter the book id on textfield relavent book information will be displayed on the relavent textfield. textfield event select as keyReleased event
public void keyReleased(KeyEvent e) {
try {
String id = txtbid.getText();
pst = con.prepareStatement("select name,edition,price from book where id = ?");
pst.setString(1, id);
ResultSet rs = pst.executeQuery();
if(rs.next()==true)
{
String name = rs.getString(1);
String edition = rs.getString(2);
String price = rs.getString(3);
txtbname.setText(name);
txtedition.setText(edition);
txtprice.setText(price);
}
else
{
txtbname.setText("");
txtedition.setText("");
txtprice.setText("");
}
}
catch (SQLException ex) {
}
}Edit
you can use the following code snippet to Edit the records.
Paste code inside the Edit button.
String bname,edition,price,bid;
bname = txtbname.getText();
edition = txtedition.getText();
price = txtprice.getText();
bid = txtbid.getText();
try {
pst = con.prepareStatement("update book set name= ?,edition=?,price=? where id =?");
pst.setString(1, bname);
pst.setString(2, edition);
pst.setString(3, price);
pst.setString(4, bid);
pst.executeUpdate();
JOptionPane.showMessageDialog(null, "Record Update!!!!!");
table_load();
txtbname.setText("");
txtedition.setText("");
txtprice.setText("");
txtbname.requestFocus();
}
catch (SQLException e1) {
e1.printStackTrace();
}
Delete
you can use the following code snippet to Delete the records.
Paste code inside the Delete button.
String bid;
bid = txtbid.getText();
try {
pst = con.prepareStatement("delete from book where id =?");
pst.setString(1, bid);
pst.executeUpdate();
JOptionPane.showMessageDialog(null, "Record Delete!!!!!");
table_load();
txtbname.setText("");
txtedition.setText("");
txtprice.setText("");
txtbname.requestFocus();
}
catch (SQLException e1) {
e1.printStackTrace();
}
i have attached the video link below. which will do this tutorials step by step.