Saturday, 23 August 2014

JDBC : Retrieve Image


















Click here to watch in Youtube : https://www.youtube.com/watch?v=JgKiAx3n4ao

Click the below Image to Enlarge
JDBC : Retrieve Image
JDBC : Retrieve Image
JDBC : Retrieve Image
JDBC : Retrieve Image
JDBC : Retrieve Image
JDBC : Retrieve Image
JDBCRetriveImageDemo.java
import java.io.FileOutputStream;
import java.sql.Blob;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public class JDBCRetriveImageDemo
{
    // JDBC driver name and database URL
    static final String JDBC_DRIVER = "com.mysql.jdbc.Driver";
    static final String DB_URL = "jdbc:mysql://localhost:3306/world";

    // Database credentials
    static final String USERNAME = "root";
    static final String PASSWORD = "root";

    public static void main(String[] args)
    {
        JDBCRetriveImageDemo jdbcRetriveImageDemo = new JDBCRetriveImageDemo();
        jdbcRetriveImageDemo.retriveImage();
    }

    private void retriveImage()
    {
        Connection connection = null;
        PreparedStatement preparedStatement = null;
        try
        {
            /*
             * Register the JDBC driver in DriverManager
             */

            Class.forName(JDBC_DRIVER);

            /*
             * Establish connection to the Database using DriverManager
             */

            connection = DriverManager
                    .getConnection(DB_URL, USERNAME, PASSWORD);

            String sql = "select * from CITY_IMAGE";

            /*
             * Execute the query
             */
            preparedStatement = connection.prepareStatement(sql);
            ResultSet rs = preparedStatement.executeQuery();

            while (rs.next())
            {
                String imageName = rs.getString(2);
                Blob imageBlob = rs.getBlob(3);
                FileOutputStream fileOutputStream = new FileOutputStream(
                        "D:/Downloads/" + imageName);

                fileOutputStream.write(imageBlob.getBytes(1,
                        (int) imageBlob.length()));
                
                System.out.println(imageName + " has been stored in D:/Downloads/" );
                
                fileOutputStream.close();
            }

            rs.close();

        }
        catch (SQLException se)
        {

            se.printStackTrace();
        }
        catch (ClassNotFoundException e)
        {
            e.printStackTrace();
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
        finally
        {
            /*
             * finally block used to close resources
             */
            try
            {
                if (preparedStatement != null)
                {
                    preparedStatement.close();
                }
            }
            catch (SQLException sqlException)
            {
                sqlException.printStackTrace();
            }
            try
            {
                if (connection != null)
                {
                    connection.close();
                }
            }
            catch (SQLException sqlException)
            {
                sqlException.printStackTrace();
            }
        }

    }
}

Output
New york.jpg has been stored in D:/Downloads/

Environment Used 

JDK version : 1.7.0_51
Mysql Server version : 5.6.19 

To Download JDBCRetrieveImageDemoApp Project Click the below link

https://sites.google.com/site/javaee4321/jdbc/JDBCRetrieve%20ImageDemoApp.zip?attredirects=0&d=1

See also:

  • Servlets Tutorial
  • All Design Patterns Links
  • JDBC Tutorial
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