POI中增加image

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

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Images are part of the drawing support. To add an image just call?createPicture()?on the drawing patriarch. At the time of writing the following types are supported:

PNGJPGDIB

It should be noted that any existing drawings may be erased once you add a image to a sheet.

WarningPicture.resize() works only for JPEG and PNG. Other formats are not yet supported.
Reading images from a workbook:
     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();        }    }http://www.iteye.com/topic/18063 http://pengliyong909.blog.163.com/blog/static/40832036201032735423383/这二个可以参考下。