Http請求出錯返回擷取

@Testpublic void testHttp400() throws Exception {URL url = new URL("http://192.168.1.143:8082/services/common/getTerms");HttpURLConnection conn = (HttpURLConnection) url.openConnection();conn.setConnectTimeout(4 * 1000);conn.setRequestMethod("GET");conn.connect();int status = conn.getResponseCode();System.out.println(status);//400System.out.println(inputStream2String(conn.getErrorStream()));//這裡使用ErrorStream}//String inputStream2String(InputStream is) throws Exception {BufferedReader in = new BufferedReader(new InputStreamReader(is));StringBuffer buffer = new StringBuffer();String line = "";while ((line = in.readLine()) != null) {buffer.append(line);}return buffer.toString();}