MySQL Dynamic Data in JTable Tutorial

Hello Friends,

Nice to see you again.

In Previous Sessions we have seen lots of Java Swing

Components Demo. And learn how they work.

Today, we will see the example of showing data from

MySql Database into JTable of Java Swing.

Normally we have to develop application which have requirement

to show Reports depends on database.

In this type of situations, We can use JTable with showing

data from Database in it.

As there is no such direct method which provide you this facility at

once. So we have to write some sort of code to enable of filling JTable with

Data from Database.

It is very easy to understand the code for this.

First remember that to fill JTable with any data, we required to

create one Model which holds actual Data and the Headers

of Columns.

So we here create one Default Table Model model and add two

parameters data and header in it.

Now these both parameters (Data,Header) must be in int or

Object or in Vector Format only.

Here I choose Vector as it is easy to fill it with Data from Database.

Now simply pass that Vectors in Constructor of DefaultTableModel,

and apply that model to your JTable. Thats it...

Here I have used MySQl database called 'test' and a table called 'one' as

shown below.

So be ready to learn this simple exmaple of MySQl Data in JTable.

After apply this code in action, you will be capable of using MySql

Database in your JTable based Swing Applications.

Output will be like this:

OK For this you have to create one class called dataInJTable.java and paste

the below code in it.

And run it....Simple right..?

------------------------------------------------------------------------------------------------------------------------------------------------

import java.awt.BorderLayout;

import java.awt.Dimension;

import java.sql.DriverManager;

import java.sql.SQLException;

import java.sql.Statement;

import java.sql.Connection;

import java.sql.ResultSet;

import java.util.Vector;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JPanel;

import javax.swing.JScrollPane;

import javax.swing.JTable;

import javax.swing.table.DefaultTableModel;

import javax.swing.table.TableColumn;

public class dataInJTable extends JFrame{

//This Vector Of A String Vector will be used to hold data from

// database table to display in JTable.

static Vector<Vector<String>> data=new Vector<Vector<String>>();

static JTable table;

public dataInJTable()

{

super("JTabe with MySql Database");

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

JPanel topPanel=new JPanel();

JLabel label1=new JLabel("MySQL Database Name : test");

label1.setPreferredSize(new Dimension(200,30));

JLabel label2=new JLabel("MySQL Table Name : One");

label2.setPreferredSize(new Dimension(200,30));

topPanel.add(label1);

topPanel.add(label2);

getContentPane().add(topPanel,BorderLayout.NORTH);

Vector<String> headers=new Vector<String>();

headers.add("id");

headers.add("Name");

getData();

//this is the model which contain actual body of JTable

DefaultTableModel model = new DefaultTableModel(data, headers);

table=new JTable(model);

table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);

header_size();

JScrollPane scroll = new JScrollPane(table);

scroll.setHorizontalScrollBarPolicy(

JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);

scroll.setVerticalScrollBarPolicy(

JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED);

getContentPane().add(scroll,BorderLayout.SOUTH);

pack();

setResizable(false);

setVisible(true);

}

/**

* Setting the particular Column Size in JTable

public static void header_size() {

TableColumn column = table.getColumnModel().getColumn(0);

column.setPreferredWidth(100);

column = table.getColumnModel().getColumn(1);

column.setPreferredWidth(350);

}

/**

* Fetching Data From MySql Database

* and storing in a Vector of a Vector

* to Display in JTable

private static void getData()

{

// Enter Your MySQL Database Table name in below Select Query.

String str="select * from one";

Connection cn;

ResultSet rs;

Statement st;

try {

// Change the database name, hosty name,

// port and password as per MySQL installed in your PC.

cn=DriverManager.getConnection("jdbc:mysql://" +

"localhost:3306/test","root","root");

st=cn.createStatement();

rs=st.executeQuery(str);

while(rs.next())

{

Vector <String> d=new Vector<String>();

d.add(rs.getString("id"));

d.add(rs.getString("name"));

d.add("\n\n\n\n\n\n\n");

data.add(d);

}

} catch (SQLException e) {

e.printStackTrace();

}

public static void main(String[] args) {

new dataInJTable();

}

--------------------------------------------------------------------

So I hope this code is helpful in understanding the working of JTable

with data from MySql Database.

Feel free to ask me if you have any dought regarding this.

You can also give me suggessions to improve this tutorial.

Leave comments if you like this post...!

Thank you.

Nirav Raval

MySQL Dynamic Data in JTable Tutorial

0 commentaires:

Enregistrer un commentaire