Question

家伙！我有个问题！我正在尝试使用以下代码从Internet下载.zip（大小为150 MB）文件：

public void downloadBuild(String srcURL, String destPath, int bufferSize, JTextArea debugConsole) throws FileNotFoundException, IOException {
    debugConsole.append(String.format("**********Start process downloading file. URL: %s**********\n", srcURL));
    try {
        URL url = new URL(srcURL);
        HttpURLConnection httpConn = (HttpURLConnection) url.openConnection();
        httpConn.setRequestMethod("POST");
        httpConn.connect();
        in = httpConn.getInputStream();
        out = new FileOutputStream(destPath);
        byte buffer[] = new byte[bufferSize];
        int c = 0;
        while ((c = in.read(buffer)) > 0) {
            out.write(buffer, 0, c);
        }
        out.flush();
        debugConsole.append(String.format("**********File. has been dowloaded: Save path is: %s********** \n", destPath));
    } catch (IOException e) {
        debugConsole.append(String.format("**********Error! File was not downloaded. Detail: %s********** \n", e.toString()));
    } finally {
        try {
            if (out != null) {
                out.close();
            }
            if (in != null) {
                in.close();
            }
        } catch (IOException ex) {
        }
    }
}

但文件未完全下载。（只有4000字节）。我究竟做错了什么？

Answer 1

FileOutputStream("example.zip").getChannel().transferFrom(Channels.newChannel(new URL("http://www.example.com/example.zip").openStream()), 0, Long.MAX_VALUE);

简单的单行。有关详细信息，请阅读here

如何使用java从URL下载.zip文件

1 个答案: