// For Ubuntu Linux (tested on a barebone install of Ubuntu 10.04 Lucid Lynx and Ubuntu 11.04 Natty Narwhal):

sudo apt-get install build-essential chrpath git-core libssl-dev libfontconfig1-dev
git clone git://github.com/ariya/phantomjs.git
cd phantomjs
git checkout 1.8
//./build.sh

// On Mac OS, Install Xcode and the necessary SDK for development (gcc, various tools, libraries, etc).

git clone git://github.com/ariya/phantomjs.git
cd phantomjs
git checkout 1.8
//./build.sh

private static String embed(File htmlFile) {

      String final_return = "error";

      try {
          
          BufferedReader br = new BufferedReader(new FileReader(htmlFile));

          StringBuilder sb = new StringBuilder();

          String line = "";

          while ((line = br.readLine()) != null) {
              sb.append(line);
          }

          br.close();

          String htmlContent = sb.toString();

          org.jsoup.nodes.Document doc = Jsoup.parse(htmlContent);

          Elements images = doc.getElementsByTag("img");

          for (Element image : images) {

              String imgName = image.attr("src");

              // we surppose image files are in the same folder with the html file.
              File tempImageFile = new File(file.getParentFile().getAbsoluteFile()+"/"+ imgName);

              if (tempImageFile.exists() && imgName.trim() != "") {

                  String imageString = new String(

                  Base64.encodeBase64(FileUtils.readFileToByteArray(tempImageFile)));

                  image.attr("src", "data:image;base64," + imageString);

              }

              else {

                  // if the image file not exist, just put a empty string in it or leave it as it was
                  image.attr("src", "data:image;base64," + "");

              }

          }

          final_return = doc.toString();

      } catch (Exception e) {

          //do stuff...
      }

      return final_return;

  }

 File f = new File("test.docx");
 String mimeType = new MimetypesFileTypeMap().getContentType(f);

result:
Mime Type of .DS_Store is application/octet-stream
Mime Type of 444.docx is application/octet-stream
Mime Type of f.jar is application/octet-stream
Mime Type of Non-Disclosure Agreement.docx is application/octet-stream
Mime Type of W9 Form.pddf is application/octet-stream

     OfficeManager officeManager = new DefaultOfficeManagerConfiguration()
          //2 ports indicate 2 working processes to do the conversion.
          .setPortNumbers(8100, 8101)
          //restart openoffice working process after every 30 conversions to prevent memory leak of the working process. (unsolved issue of openoffice)
          .setMaxTasksPerProcess(30)
          //untouched tasks in the queue that over 1200000ms will be discarded.(get a officeManager not found exception)
          .setTaskQueueTimeout(1200000)
          //if one task processing time over 20000ms, it will throw an exception.
          .setTaskExecutionTimeout(20000)
          .buildOfficeManager();

      officeManager.start();
      OfficeDocumentConverter converter = new OfficeDocumentConverter(officeManager);
      converter.convert(new File(filepath1), new File(filepath2));

      officeManager.stop();