How to retrieve am image from database

Question

hi ,
i hav a requirement that, i hav to store and retrive an image from database(postgresql)and palce it on JLabel.i successfully stored an image into database .while retrieving an image from database im not getting the image .please any one can help me how to retrieve an image and place it in JLabel.
This the code for inserting an image:
Class.forName("org.postgresql.Driver");
Connection conn = DriverManager.getConnection("jdbc:postgresql://localhost:port/database", "username", "pwd");
System.out.println("Connection established");
String INSERT_PICTURE = "insert into imagedata(imageid,data) values (?, ?)";
FileInputStream fis = null;
PreparedStatement ps = null;
try {
conn.setAutoCommit(false);
File file = new File("photo.jpg");
fis = new FileInputStream(file);
ps = conn.prepareStatement(INSERT_PICTURE);
ps.setInt(1, 2);
ps.setBinaryStream(2, fis, (int) file.length());
ps.executeUpdate();
conn.commit();
catch(Exception ex)
ex.printStackTrace();
finally {
ps.close();
fis.close();This is the code for retrieve an image :
Class.forName("org.postgresql.Driver");
Connection conn = DriverManager.getConnection("jdbc:postgresql://localhost:port/database", "username", "pwd");
byte[] imgbytes = null;
String INSERT_PICTURE = "select imageid,data from imagedata ";
Statement stmt=(Statement) conn.createStatement();
try {
ResultSet rs=stmt.executeQuery(INSERT_PICTURE);
while(rs.next())
System.out.println(rs.getString(1));
InputStream file=rs.getBinaryStream(2);
System.out.println("FILE : "+file);
catch(SQLException a)
finally {
stmt.close();please anyone can help meee
thanks

Answer 1

You basically save a File to the database, so you can just re-write the data from the file back temporarily and load it into the application using the ImageIO class
// create necessary connection and statement objects
// retrieve image column
ResultSet rs = stmt.executeQuery("SELECT Image FROM dataTable");
rs.next();
Blob imageData = rs.getBlob("Image");
if( imageData != null ) {
    try {
        File tmpFile = new File("tmpImage");
        FileOutputStream fos = new FileOutputStream(tmpFile);
            fos.write( imageData.getBytes(1L, (int)imageData.length()) );
            fos.close();
        tmpFile.deleteOnExit();
        ImageIcon icon = new ImageIcon( ImageIO.read(tmpFile) );   
        JOptionPane.showMessageDialog(null, icon);
    } catch(IOException ioe) {
        ioe.printStackTrace();
        JOptionPane.showMessageDialog(null, "Failed To Load Image Data", "Load Error",
                JOptionPane.ERROR_MESSAGE);
}ICE