java利用POI向excel添加图片

InputStream images = new FileInputStream(image);
        byte[] bytes = IOUtils.toByteArray(images);
        int pictureIdx = workbook.addPicture(bytes, Workbook.PICTURE_TYPE_PNG);
        CreationHelper helper = workbook.getCreationHelper();
        int sheetNos=workbook.getNumberOfSheets();
        for(int i=1;i<sheetNos;i++){
            Sheet sheet= workbook.getSheetAt(i);
            Drawing drawing = sheet.createDrawingPatriarch();
            ClientAnchor anchor = helper.createClientAnchor();
            anchor.setCol1(8);
            anchor.setRow1(0);
            Picture pict = drawing.createPicture(anchor, pictureIdx);
            pict.resize();
        }
        ByteArrayOutputStream outputStream=new ByteArrayOutputStream();
        workbook.write(outputStream);