public static void saveImage(String imageUrl) throws IOException {
        String tempDir = System.getProperty("java.io.tmpdir");
        URL u = new URL(imageUrl);
        String fileName = u.getFile();
        String destName = tempDir + fileName.substring(fileName.lastIndexOf("_"));
        System.out.println(destName);
        HttpURLConnection i = (HttpURLConnection) u.openConnection();
        i.setRequestProperty("Connection", "close");
        InputStream is = i.getInputStream();
        OutputStream os = new FileOutputStream(destName);

        byte[] b = new byte[2048];
        int length;

        while ((length = is.read(b)) != -1) {
            os.write(b, 0, length);
        }
        is.close();
        os.close();
    }