Android通过URL文件下载及文件名提取

public class FileDownloader {
    public static void downloadFile(String fileUrl) {
        try {
            URL url = new URL(fileUrl);
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            connection.setRequestMethod("GET");

            // 获取文件名
            String fileName = getFileNameFromUrl(fileUrl);

            // 创建文件保存路径
            String savePath = Environment.getExternalStorageDirectory().getPath() + "/" + fileName;
            File file = new File(savePath);

            // 打开输入流和输出流
            InputStream inputStream = connection.getInputStream();
            FileOutputStream outputStream = new FileOutputStream(file);

            // 读取数据并保存到文件
            byte[] buffer = new byte[4096];
            int bytesRead;
            while ((bytesRead = inputStream.read(buffer)) != -1) {
                outputStream.write(buffer, 0, bytesRead);
            }

            // 关闭输入流和输出流
            outputStream.close();
            inputStream.close();

            // 下载完成
            Log.d("FileDownloader", "文件下载成功：" + savePath);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private static String getFileNameFromUrl(String fileUrl) {
        String fileName = "";
        try {
            // 提取URL中的文件名
            fileName = URLUtil.guessFileName(fileUrl, null, null);
            // 解码文件名
            fileName = URLDecoder.decode(fileName, "UTF-8");
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        return fileName;
    }
}

String fileUrl = "https://example.com/files/myfile.txt";
FileDownloader.downloadFile(fileUrl);