Author: allaboutbasic

Today I will show you how to connect with database server using Java.

Here, I have used PostGre Sql as my database server  and I have uploaded the PGSQL.Jar  (the postgre sql driver) for your convenience.

** I have used the OldVersion of NetBeans (NetBeans IDE 5.0) and JDK 1.4.2.

** Another matter, You have to include the  pgsql.jar  in your classpath while compiling and running this project.

 ** Download pgsql.jar  from http://www.ziddu.com/download/12613415/pgsql.jar.html

package dbconnection;

import java.sql.*;

 public class dbConnection extends javax.swing.JFrame {

     private void myInit()

    {

         /************************DB Connection Started********************/

   Connection result = null;

   String DB_CONN_STRING =”jdbc:postgresql://localhost:5432/replicationdb”;

    String DRIVER_CLASS_NAME = “org.postgresql.Driver”;

    String USER_NAME = “XYZ”;

    String PASSWORD = “pass”;

    try {

       Class.forName(“org.postgresql.Driver”);

    }

    catch (ClassNotFoundException cnfe){

    System.out.println(“Couldn’t find the driver!”);

    System.out.println(“Let’s print a stack trace, and exit.”);

    cnfe.printStackTrace();

    System.exit(1);

            }

    try {

 result = DriverManager.getConnection(“jdbc:postgresql://localhost:5432/Test”, USER_NAME, PASSWORD);

            }

    catch (SQLException se){

    System.out.println(“Couldn’t connect: print out a stack trace and exit.”);

    se.printStackTrace();

    System.exit(1);

         }

   /*******************DB Connection finished***************************/

    }

    public dbConnection() {

        initComponents();

        myInit();

    }

/***************Auto Generated Code by NetBeans—-Started from here *****************    

    private void initComponents() {

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        setCursor(new java.awt.Cursor(java.awt.Cursor.DEFAULT_CURSOR));

        setForeground(java.awt.Color.white);

        org.jdesktop.layout.GroupLayout layout = new org.jdesktop.layout.GroupLayout(getContentPane());

        getContentPane().setLayout(layout);

        layout.setHorizontalGroup(

                layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)

                .add(0, 446, Short.MAX_VALUE)

                );

        layout.setVerticalGroup(

                layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)

                .add(0, 350, Short.MAX_VALUE)

                );

        pack();

    }                      

/******************** Auto Generated Code by NetBeans—-Ended*******************/

    public static void main(String args[]) {

        java.awt.EventQueue.invokeLater(new Runnable() {

            public void run() {

                new dbConnection().setVisible(true);

            }

        });

    }

}

The following program will show you how to show image in  the table of a pdf  using java and iText. It is too much easy.  If you face any problem to understand please leave a reply.

** I have used NetBeans IDE 5.0  and JDK 1.4.2 –Old Version :(

 ** To run this Code, you have to add pgsql.jar (postgre sql driver),iText-2.1.7.jar( To Create PDF) in your classpath

The OutPut will be like this:

/*****************************************************/

package db2pdf;

import java.io.*;

import com.lowagie.text.*;

import com.lowagie.text.pdf.*;

import java.sql.*;

import java.util.*;

import java.io.*;

/**

*

 To run this Code, you have to add pgsql.jar (postgre sql driver),iText-2.1.7.jar( To Create PDF) in your classpath

*/

public class Main {

public Main() {

}

public static void main(String[] args) {

Document doc=null;

PdfPTable table=null;

Image image=null;

try{

System.out.println(“entered”);

doc=new Document();

PdfWriter.getInstance(doc,new FileOutputStream(“C:\\Table.pdf”));

doc.open();

 table=new PdfPTable(9);

table.setWidthPercentage(100);

table.setWidths(new float[] {1f, 1f, 1f, 1f,1f, 1f,3f,1f,2f});

table.addCell(“ID No”);

table.addCell(“Name”);

table.addCell(“Father’s Name”);

table.addCell(“Mother’s Name”);

table.addCell(“Thana”);

table.addCell(“District”);

table.addCell(“Present Address”);

table.addCell(“NID”);

table.addCell(“Picture”);

//doc.add(table);

// doc.close();

}

catch(Exception e){}

/*******************DB Connection Started*************************/

Connection result = null;

String DB_CONN_STRING =”jdbc:postgresql://localhost:5432/replicationdb”;

String DRIVER_CLASS_NAME = “org.postgresql.Driver”;

String USER_NAME = “XYZ”;

String PASSWORD = “line”;

try {

Class.forName(“org.postgresql.Driver”);

}

catch (ClassNotFoundException cnfe){

// log(“Check classpath. Cannot load db driver: ” + DRIVER_CLASS_NAME);

System.out.println(“Couldn’t find the driver!”);

System.out.println(“Let’s print a stack trace, and exit.”);

cnfe.printStackTrace();

System.exit(1);

}

try {

result = DriverManager.getConnection(“jdbc:postgresql://localhost/Test”, USER_NAME, PASSWORD); 

}

catch (SQLException se){

//log( “Driver loaded, but cannot connect to db: ” + DB_CONN_STRING);

System.out.println(“Couldn’t connect: print out a stack trace and exit.”);

se.printStackTrace();

System.exit(1);

　

}

// return result;

/*******************DB Connection finished***************************/

/**************************** Query Initialization ***************/

try{

PreparedStatement ps = result.prepareStatement(“select id,name,fathername,mothername,thana,district,presentaddress,nidno,picture from worker2 “);

ResultSet rs = ps.executeQuery();

if (rs != null) {

while(rs.next()) {

table.addCell(new String(rs.getBytes(1)));

table.addCell(new String(rs.getBytes(2)));

table.addCell(new String(rs.getBytes(3)));

table.addCell(new String(rs.getBytes(4)));

table.addCell(new String(rs.getBytes(5)));

table.addCell(new String(rs.getBytes(6)));

table.addCell(new String(rs.getBytes(7)));

table.addCell(new String(rs.getBytes(8)));

image = Image.getInstance (rs.getBytes(9));

System.out.println(“Image:”+rs.getBytes(9));

table.addCell(image);

}}

doc.add(table);

//doc.add(image);

doc.close();

String file=”C:\\Table.pdf”;

Runtime.getRuntime().exec(“rundll32 url.dll,FileProtocolHandler “+file);

}

catch(Exception e){}

/**************************** Query Initialization ***************/

}

}