Extract OLE Objects from Workbook

Extract OLE Objects from a Workbook

Creating a Template Workbook

  1. Created a spreadsheet in Microsoft Excel.
  2. Add a Microsoft Word document, an Excel workbook and a PDF document as OLE objects on the first worksheet.

Extract OLE Objects

The code below does the actual work of finding and extracting OLE objects as DOCX, XLSX, PPTX and PDF files.

// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-Java
// The path to the documents directory.
String dataDir = Utils.getDataDir(ExtractOLEObjects.class);
// Instantiating a Workbook object, Open the template file.
Workbook workbook = new Workbook(dataDir + "oleFile.xlsx");
// Get the OleObject Collection in the first worksheet.
OleObjectCollection objects = workbook.getWorksheets().get(0).getOleObjects();
// Loop through all the OleObjects and extract each object in the worksheet.
for (int i = 0; i < objects.getCount(); i++) {
OleObject object = objects.get(i);
// Specify the output filename.
String fileName = "D:/object" + i + ".";
// Specify each file format based on the OleObject format type.
switch (object.getFileFormatType()) {
case FileFormatType.DOCX:
fileName += "docx";
break;
case FileFormatType.XLSX:
fileName += "xlsx";
break;
case FileFormatType.PPTX:
fileName += "pptx";
break;
case FileFormatType.PDF:
fileName += "pdf";
break;
case FileFormatType.UNKNOWN:
fileName += "jpg";
break;
default:
// ........
break;
}
// Save the OleObject as a new excel file if the object type is xls.
if (object.getFileFormatType() == FileFormatType.XLSX) {
byte[] bytes = object.getObjectData();
InputStream is = new ByteArrayInputStream(bytes);
Workbook oleBook = new Workbook(is);
oleBook.getSettings().setHidden(false);
oleBook.save(fileName);
}
// Create the files based on the OleObject format types.
else {
FileOutputStream fos = new FileOutputStream(fileName);
fos.write(object.getObjectData());
fos.close();
}
}

Conclusion: