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バイトを読み取って、システム コンソールに出力できます。しかし、GAE はファイル作成をサポートしていないため、StackOverflow を検索したところ、GAE blobstore に書き込むことができることがわかりました。しかし、私はGAEが初めてなので、どうすればいいのかわかりません..

public void doPost(HttpServletRequest req, HttpServletResponse resp) throws IOException {
    resp.setContentType("text/html;charset=UTF-8");
    // resp.setContentType("text/plain");
    PrintWriter out = resp.getWriter();
    try {
        ServletFileUpload upload = new ServletFileUpload();
        FileItemIterator iterator = upload.getItemIterator(req);
        // out.println("<html><body>");

        while (iterator.hasNext()) {
            FileItemStream item = iterator.next();
            InputStream in = item.openStream();

            if (item.isFormField()) {
                out.println("<br />Got a form field: " + item.getFieldName());
            } else {
                out.println("<br />Got an uploaded file: " + item.getFieldName() + ", name = " + item.getName());

                ZipInputStream zis = new ZipInputStream(
                new BufferedInputStream( in ));

                ZipEntry entry;

                // Read each entry from the ZipInputStream until no
                // more entry found indicated by a null return value
                // of the getNextEntry() method.

                byte[] buf = new byte[10244];
                int len;
                while ((entry = zis.getNextEntry()) != null) {

                    out.println("Unzipping: " + entry.getName());

                    FileService fileService = FileServiceFactory.getFileService();

                    AppEngineFile file = fileService.createNewBlobFile("text/plain");

                    boolean lock = false;
                    FileWriteChannel writeChannel = fileService.openWriteChannel(file, lock);

                    PrintWriter outter = new PrintWriter(Channels.newWriter(writeChannel, "UTF8"));

                    StringBuilder sb = new StringBuilder(buf.length);
                    if (entry.getName().equalsIgnoreCase("booking.csv")) {
                        int count = 0;
                        while ((len = zis.read(buf, 0, buf.length)) != -1) {
                            //I'm trying to write byte[] into blobstore instead of printing using
                            //System.out.write(buf, 0, len);
                        }

何かアドバイス？

4

2 に答える 2

1

これを試して：

FileWriteChannel writeChannel = fileService.openWriteChannel(file, lock);
while ((len = zis.read(buf, 0, buf.length)) != -1) {
    writeChannel. write(ByteBuffer.wrap(buf, 0, len), null);
}
于 2012-09-08T08:19:20.447 に答える