Get an image and its position from excel file using Apache POI

Question

Is it possible to extract an image\'s information from an xls spreadsheet using Apache POI?

In one of my projects, I need to read some images from a .xls file. I can

Answer 1

Have a look here:

http://poi.apache.org/components/spreadsheet/quick-guide.html#Images

Sample:

List lst = workbook.getAllPictures();

for (Iterator it = lst.iterator(); it.hasNext(); ) {

    PictureData pict = (PictureData)it.next();

    String ext = pict.suggestFileExtension();

    byte[] data = pict.getData();

    if (ext.equals("jpeg")) {

      FileOutputStream out = new FileOutputStream("pict.jpg");

      out.write(data);

      out.close();

    }
}

After this, you can use tools like ImageInfo which extends Magick to find out various configs. Yo can even convert images to different sizes.

Take a look at this class as well:

http://blog.jaimon.co.uk/simpleimageinfo/SimpleImageInfo.java.html

-- Hope this helps

Answer 2

And if you don`t want to use iterator (cause some times they are heavy)

public List readDrawing(Workbook workbook) throws Exception {
    List list = workbook.getAllPictures();

    for (int i=0; i<list.size(); i++) {
        PictureData picture = (PictureData) list.get(i);

        String ext = picture.suggestFileExtension();
        byte[] data = picture.getData();

        FileOutputStream out = new FileOutputStream("imageName" + "." + ext);
        out.write(data);
        out.close();
    }

    return list;
}

Answer 3

I hope this code will help)

    XSSFDrawing dp = workbook.getSheetAt(1).createDrawingPatriarch();
    List<XSSFShape> pics = dp.getShapes();
    XSSFPicture inpPic = (XSSFPicture)pics.get(0);

    XSSFClientAnchor clientAnchor = inpPic.getClientAnchor();
    inpPic.getShapeName(); // узнаю название картинки
    PictureData pict = inpPic.getPictureData();
    FileOutputStream out = new FileOutputStream("pict.jpg");
    byte[] data = pict.getData();
    out.write(data);
    out.close();
    System.out.println("col1: " + clientAnchor.getCol1() + ", col2: " + clientAnchor.getCol2() + ", row1: " + clientAnchor.getRow1() + ", row2: " + clientAnchor.getRow2());
    System.out.println("x1: " + clientAnchor.getDx1() + ", x2: " + clientAnchor.getDx2() +  ", y1: " + clientAnchor.getDy1() +  ", y2: " + clientAnchor.getDy2());