JSP: how to convert BLOB from mysql into bufferedimage

 ByteArrayOutputStream outClean = new ByteArrayOutputStream();
ImageIO.write(imgClean, "png", outClean);
byte[] bufClean = outClean.toByteArray();
// setup stream for blob
ByteArrayInputStream streamClean = new ByteArrayInputStream(bufClean);

String sql = "INSERT INTO users (userName, userCleanImage)"
        + "VALUES (?, ?)";
PreparedStatement statement = conn.prepareStatement(sql);

statement.setString(1, username);
statement.setBinaryStream(2, streamClean, streamClean.available());


int n = statement.executeUpdate();

    ResultSet rs = null;
BufferedImage bufImg = null;
try {
    String sql = "Select userCleanImage from users"
                    + "where userName = ?";
    PreparedStatement statement = conn.prepareStatement(sql);
    statement.setString(1, username);
    rs = statement.executeQuery();
    Blob aBlob = rs.getBlob("userCleanImage");
    InputStream is = aBlob.getBinaryStream(0, aBlob.length());
    bufImg = ImageIO.read(is);

return bufImg;
} catch (SQLException e) {

}catch (IOException io) {

}