Apache HttpClient Example

HttpGet httpGet = new HttpGet(imageUrl);

try {
    RequestConfig requestConfig = RequestConfig.custom()
            .setSocketTimeout(HTTP_TIME_OUT)
            .setConnectTimeout(HTTP_TIME_OUT)
            .setConnectionRequestTimeout(HTTP_TIME_OUT)
            .build();
    CloseableHttpClient client = HttpClients.custom().setDefaultRequestConfig(requestConfig).build();
    HttpResponse response= client.execute(httpGet);

    if (response.getStatusLine().getStatusCode() == HttpStatus.SC_NOT_FOUND) {
        throw new ValidationException("not found image");
    }

} catch (ValidationException ve) {
    throw ve;
} catch (Exception e) {
    log.warn(e.getMessage(), e);
} finally {
    httpGet.releaseConnection();
}