Question

任何人都可以看到此代码有什么问题。它没有显示进度条，但是上传所有文件。我也检查了太阳教程和摇摆工作者，但我还没有解决它。

private static boolean putFile(String m_sLocalFile, FtpClient m_client) {
    boolean success = false;
    int BUFFER_SIZE = 10240;
    if (m_sLocalFile.length() == 0) {
        System.out.println("Please enter file name");
    }
    byte[] buffer = new byte[BUFFER_SIZE];
    try {
        File f = new File(m_sLocalFile);
        int size = (int) f.length();
        System.out.println("File " + m_sLocalFile + ": " + size + " bytes");
        System.out.println(size);
        FileInputStream in = new FileInputStream(m_sLocalFile);
        //test
        InputStream inputStream = new BufferedInputStream(
                      new ProgressMonitorInputStream(null,"Uploading " + f.getName(),in));

        //test
        OutputStream out = m_client.put(f.getName());

        int counter = 0;
        while (true) {
            int bytes = inputStream.read(buffer);  //in
            if (bytes < 0)
                break;
            out.write(buffer, 0, bytes);
            counter += bytes;
            System.out.println(counter);
        }

        out.close();
        in.close();
        inputStream.close();
        success =true;
    } catch (Exception ex) {
        System.out.println("Error: " + ex.toString());
    }
    return true;
}

Answer 1

我认为你的代码很好也许这个任务花了足够长的时间才能需要进度条？

这是您的代码的修改版本，它从本地文件读取并写入另一个本地文件我还为写入添加了一个延迟，以便它给进度条提供时间。这可以在我的系统上使用12MB PDF文件样本正常工作，并显示进度条如果你有一个较小的文件，那么只需将睡眠从5毫秒增加到100或者其他东西 - 你需要进行实验。

我甚至不知道ProgressMonitorInputStream类存在，所以我自己学到了一些东西;]。

/**
 * main
 */
public static void main(String[] args) {
    try {
        System.out.println("start");

        final String inf = "d:/testfile.pdf";
        final String outf = "d:/testfile.tmp.pdf";
        final FileOutputStream out = new FileOutputStream(outf) {
            @Override
            public void write(byte[] b, int off, int len) throws IOException {
                super.write(b, off, len);
                try {
                    // We delay the write by a few millis to give the progress bar time to kick in
                    Thread.sleep(5);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        };

        putFile(inf, out);

        System.out.println("end");
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    }
}

private static boolean putFile(String m_sLocalFile, OutputStream out /*FtpClient m_client*/) {
    boolean success = false;
    int BUFFER_SIZE = 10240;
    if (m_sLocalFile.length() == 0) {
        System.out.println("Please enter file name");
    }
    byte[] buffer = new byte[BUFFER_SIZE];
    try {
        File f = new File(m_sLocalFile);
        int size = (int) f.length();
        System.out.println("File " + m_sLocalFile + ": " + size + " bytes");
        System.out.println(size);
        FileInputStream in = new FileInputStream(m_sLocalFile);
        //test
        InputStream inputStream = new BufferedInputStream(
                      new ProgressMonitorInputStream(null,"Uploading " + f.getName(),in));

        //test
        //OutputStream out = m_client.put(f.getName());

        int counter = 0;
        while (true) {
            int bytes = inputStream.read(buffer);  //in
            if (bytes < 0)
                break;
            out.write(buffer, 0, bytes);
            counter += bytes;
            System.out.println(counter);
        }

        out.close();
        in.close();
        inputStream.close();
        success =true;
    } catch (Exception ex) {
        System.out.println("Error: " + ex.toString());
    }
    return true;
}

如何将ProgressMonitor InputStream添加到ftp上传？

1 个答案: