/*** GET請求獲取圖片 或者其他文件** @param url* @param headers* @return**/public static byte[] doGetImg(String url, Map<String, String> headers) {CloseableHttpClient httpclient = HttpClients.createDefault();RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(TIME_OUT).setConnectTimeout(TIME_OUT).build();HttpGet httpGet = new HttpGet(url);if (headers != null) {for (String key : headers.keySet()) {httpGet.addHeader(key, headers.get(key));}}httpGet.setConfig(requestConfig);try {CloseableHttpResponse response = httpclient.execute(httpGet);HttpEntity entity = response.getEntity();// 如果狀態碼不是200，返回空，表示失敗int htttpStatusCode = response.getStatusLine().getStatusCode();if (200 != htttpStatusCode) {LOG.error("get img fail : url={} , headers={} , entity={} , https狀態碼={}", url, headers,EntityUtils.toString(entity), htttpStatusCode);return null;}// 圖片最大20Mfinal long maxSize = 20 * 1024 * 1024;ByteArrayOutputStream os = new ByteArrayOutputStream();if (entity != null) {InputStream stream = entity.getContent();int i;while ((i = stream.read()) != -1) {os.write(i);}os.flush();}return os.toByteArray();} catch (Exception e) {LOG.error("url={}", url, e);} finally {try {httpclient.close();} catch (IOException e) {e.printStackTrace();}}return null;}

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