使用pdfbox提取PDF文件中的flash文件

private static void parsePdfFile(String file) throws Exception {
        FileInputStream fis = new FileInputStream(file);
        PDFParser pdfParser = new PDFParser(fis);
        pdfParser.parse();
        COSDocument cosDocument = pdfParser.getDocument();
        List<COSObject> objList = cosDocument.getObjects();
        for (COSObject obj : objList) {
            COSBase cosBase = obj.getItem(COSName.SUBTYPE);
            if (null != cosBase && cosBase instanceof COSName) {
                String strName = cosBase.toString();
                if ("COSName{application/x-shockwave-flash}".equals(strName)) {
                    COSStream cosStream = COSUtils.getAsStream(obj, cosDocument);
                    InputStream inputStream = cosStream.getUnfilteredStream();
                    String strOutFile = String.format("/tmp/%s.swf", new Date().getTime());
                    FileOutputStream fileOutputStream = new FileOutputStream(strOutFile);
                    byte[] bytes = new byte[10240];
                    int iRead;
                    while (true) {
                        iRead = inputStream.read(bytes);
                        if (iRead <= 0) {
                            break;
                        }
                        fileOutputStream.write(bytes, 0, iRead);
                    }
                    fileOutputStream.close();
                    inputStream.close();
                }
            }

        }