How to save info in a meta-data of a jpg file?

Question

hi, i need to know how to save info in a meta-data of a jpg file:
this is my code (doesn't work):
i get an exception,
javax.imageio.metadata.IIOInvalidTreeException: JPEGvariety and markerSequence nodes must be present
at com.sun.imageio.plugins.jpeg.JPEGMetadata.mergeNativeTree(JPEGMetadata.java:1088)
at com.sun.imageio.plugins.jpeg.JPEGMetadata.mergeTree(JPEGMetadata.java:1061)
at playaround.IIOMetaDataWriter.run(IIOMetaDataWriter.java:59)
at playaround.Main.main(Main.java:14)
package playaround;
import java.io.*;
import java.util.Iterator;
import java.util.Locale;
import javax.imageio.*;
import javax.imageio.metadata.IIOMetadata;
import javax.imageio.metadata.IIOMetadataNode;
import javax.imageio.plugins.jpeg.JPEGImageWriteParam;
import javax.imageio.stream.*;
import org.w3c.dom.*;
public class IIOMetaDataWriter {
public static void run(String[] args) throws IOException{
try {
File f = new File("C:/images.jpg");
ImageInputStream ios = ImageIO.createImageInputStream(f);
Iterator readers = ImageIO.getImageReaders(ios);
ImageReader reader = (ImageReader) readers.next();
reader.setInput(ImageIO.createImageInputStream(f));
ImageWriter writer = ImageIO.getImageWriter(reader);
writer.setOutput(ImageIO.createImageOutputStream(f));
JPEGImageWriteParam param = new JPEGImageWriteParam(Locale.getDefault());
IIOMetadata metaData = writer.getDefaultStreamMetadata(param);
String MetadataFormatName = metaData.getNativeMetadataFormatName();
IIOMetadataNode root = (IIOMetadataNode)metaData.getAsTree(MetadataFormatName);
IIOMetadataNode markerSequence = getChildNode(root, "markerSequence");
if (markerSequence == null) {
markerSequence = new IIOMetadataNode("JPEGvariety");
root.appendChild(markerSequence);
IIOMetadataNode jv = getChildNode(root, "JPEGvariety");
if (jv == null) {
jv = new IIOMetadataNode("JPEGvariety");
root.appendChild(jv);
IIOMetadataNode child = getChildNode(jv, "myNode");
if (child == null) {
child = new IIOMetadataNode("myNode");
jv.appendChild(child);
child.setAttribute("myAttName", "myAttValue");
metaData.mergeTree(MetadataFormatName, root);
catch (Throwable t){
t.printStackTrace();
protected static IIOMetadataNode getChildNode(Node n, String name) {
NodeList nodes = n.getChildNodes();
for (int i = 0; i < nodes.getLength(); i++) {
Node child = nodes.item(i);
if (name.equals(child.getNodeName())) {
return (IIOMetadataNode)child;
return null;
static void displayMetadata(Node node, int level) {
indent(level); // emit open tag
System.out.print("<" + node.getNodeName());
NamedNodeMap map = node.getAttributes();
if (map != null) { // print attribute values
int length = map.getLength();
for (int i = 0; i < length; i++) {
Node attr = map.item(i);
System.out.print(" " + attr.getNodeName() +
"=\"" + attr.getNodeValue() + "\"");
Node child = node.getFirstChild();
if (child != null) {
System.out.println(">"); // close current tag
while (child != null) { // emit child tags recursively
displayMetadata(child, level + 1);
child = child.getNextSibling();
indent(level); // emit close tag
System.out.println("</" + node.getNodeName() + ">");
} else {
System.out.println("/>");
static void indent(int level) {
for (int i = 0; i < level; i++) {
System.out.print(" ");
}

Answer 1

Hi,
Yes, you need store data to table, and fetch it when page is opened.
Simple way is create table with few columns and e.g. with CLOB column and then create form based on that table.
Then modify item types as you like, e.g. use HTML editor for CLOB column
Regards,
Jari