Changing Image and text using docx4j

import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;

import javax.xml.bind.JAXBElement;

import org.docx4j.openpackaging.packages.WordprocessingMLPackage;
import org.docx4j.openpackaging.parts.Part;
import org.docx4j.openpackaging.parts.PartName;
import org.docx4j.openpackaging.parts.Parts;
import org.docx4j.openpackaging.parts.WordprocessingML.BinaryPart;
import org.docx4j.wml.Text;

public class ReportFromTemplate {
static File fileToReplace = new File("C:\\test\\logo1.png");
private static byte[] fileToBytes(File file) throws FileNotFoundException,
IOException {
byte[] bytes = null;
// Our utility method wants that as a byte array
if (file.exists() && file.isFile()) {
java.io.InputStream is = new java.io.FileInputStream(file);
long length = file.length();
// You cannot create an array using a long type.
// It needs to be an int type.
bytes = new byte[(int) length];
int offset = 0;
int numRead = 0;
while (offset < bytes.length
&& (numRead = is.read(bytes, offset, bytes.length - offset)) >= 0) {
offset += numRead;
}
// Ensure all the bytes have been read in
if (offset < bytes.length) {
// System.out.println("Could not completely read file
// "+file.getName());
}
is.close();
} else {
bytes = new byte[0];
}
return bytes;
}

public static void main(String args[]) {
final String XPATH_TO_SELECT_TEXT_NODES = "//w:t";
String fileName = "";
try {
// Populate the Strings that will replace the template text
Map map = new HashMap();
map.put("Project", "BP Mount");
map.put("date", "21-Mar-2011");

// C:\\test\\template1.docx is the template file
WordprocessingMLPackage template = WordprocessingMLPackage
.load(new File("C:\\test\\template1.docx"));

Parts parts = template.getParts();

HashMap partsMap = parts.getParts();
PartName partName = null;
Part part = null;

Set set = partsMap.keySet();
for (Iterator iterator = set.iterator(); iterator.hasNext();) {
PartName name = (PartName) iterator.next();
if (name.getName().equalsIgnoreCase("/word/media/image1.png")) {
part = partsMap.get(name);
partName = name;
}

}
if(part !=null && partName !=null ){
part = partsMap.get(partName);
BinaryPart binaryPart = (BinaryPart) part;
binaryPart.setBinaryData(fileToBytes(fileToReplace));
}


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