Java tutorial
/* Defining the Table: Oracle and MySql create table MyPictures ( id INT PRIMARY KEY, name VARCHAR(0), photo BLOB ); */ import java.sql.Blob; import java.sql.Connection; import java.sql.PreparedStatement; import java.sql.ResultSet; import javax.swing.JPanel; public class Main { public static void main(String args[]) throws Exception { Connection conn = null; byte[] data = getBLOB(01, conn); } public static byte[] getBLOB(int id, Connection conn) throws Exception { ResultSet rs = null; PreparedStatement pstmt = null; String query = "SELECT photo FROM MyPictures WHERE id = ?"; try { pstmt = conn.prepareStatement(query); pstmt.setInt(1, id); rs = pstmt.executeQuery(); rs.next(); Blob blob = rs.getBlob("photo"); // materialize BLOB onto client return blob.getBytes(1, (int) blob.length()); } finally { rs.close(); pstmt.close(); conn.close(); } } }