下载网络资源

 public static void UrlDown() {
        URL url = null;
        String filePath = "";
        try {
            url = new URL("https://dss0.bdstatic.com/5aV1bjqh_Q23odCf/static/superman/img/topnav/[email protected]");
            HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
            InputStream inputStream = urlConnection.getInputStream();
            filePath="1.png";
            FileOutputStream fos = new FileOutputStream(filePath);
            byte[] buffer = new byte[1024];
            int len;
            while ((len = inputStream.read(buffer)) != -1) {
                fos.write(buffer, 0, len);//写出
            }
            fos.close();
            inputStream.close();
            urlConnection.disconnect();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }