我如何从java应用程序下载一些东西，然后把它放到桌面上？

大家好，我想做一个应用程序，它从网站上下载一些东西，并把它放在桌面上

这段代码下载了它，但暂时，我该如何保存它呢

这是我的密码

    private static void grabItem() throws ClassNotFoundException,
        InstantiationException, IllegalAccessException, IOException,
        UnsupportedLookAndFeelException {
    final URL url = new URL("sampleurl");
    final InputStream is = url.openStream();
    final byte[] b = new byte[2048];
    int length;
    final HttpURLConnection connection = (HttpURLConnection) url
            .openConnection();

    // Specify what portion of file to download.
    connection.setRequestProperty("Range", "bytes=" + downloaded + "-");

    // Connect to server.
    connection.connect();

    // Make sure response code is in the 200 range.
    if ((connection.getResponseCode() / 100) != 2) {
        logger.info("Unable to find file");
        return;
    }

    // set content length.
    size = connection.getContentLength();
    while ((length = is.read(b)) != -1) {
        downloaded += length;
        progressBar.setValue((int) getProgress()); // set progress bar
    }
    is.close();
    setFrameTheme();

}

---

谢谢

您从未将任何数据写入计算机。。。但是无论如何

这就是我下载和保存文件的方式。。。它需要是一个直接下载，但它很容易改变它的工作方式，你想要它

URL url = new URL("direct link goes here");
URLConnection connection = url.openConnection();
InputStream inputstream = connection.getInputStream();

为了让它拯救你，你会

BufferedOuputStream bufferedoutputstream = new BufferedOutputStream(new FileOutputStream(new File("location to save downloaded file")));
byte[] buffer = new byte[1024];
int bytesRead = 0;

while((bytesRead = inputstream.read(buffer)))
{
    bufferedoutputstream.write(buffer, 0, bytesRead);
}
bufferedoutputstream.flush();
bufferedoutputstream.close();
inputstream.close();

---

那应该下载并保存

为什么你觉得有必要抛出ClassNotFoundException.download。将文件放入桌面目录。或者你的意思是想让它成为桌面背景？把它放在桌面目录中你试过什么？出了什么问题？请帮忙！！对你和我们都没有任何帮助。