restTempate使用

下载图片

RestTemplate restTemplate=new RestTemplate(); ResponseEntity<Resource> forObject = restTemplate.getForEntity( "http://127.0.0.1:8030/images/1.jpg", Resource.class); Path path = Paths.get("D:\\Users\\StSahana\\Desktop", "a.jpg"); Files.copy(forObject.getBody().getInputStream(),path);

访问图片URL并返回byte[]

ResponseEntity<byte[]> response = restTemplate.exchange("http://127.0.0.1:8030/images/1.jpg", HttpMethod.GET, null, byte[].class); byte[] imageBytes = response.getBody();

原生httpclient发送文件到服务端

FileSystemResource resource =new FileSystemResource(new File(path.toString())); MultiValueMap<String, Object> form = new LinkedMultiValueMap<String, Object>(); form.add("file",resource); HttpEntity< MultiValueMap<String, Object> > formEntity = new HttpEntity< MultiValueMap<String, Object> >(form, headers); HttpEntity<String> res = restTemplate.exchange("http://127.0.0.1:8080/upload", HttpMethod.POST, formEntity, String.class); System.out.println(res.getBody());

原生httpclient访问图片并直接上传至服务端。

JSONObject result = null; HttpPost post = null; CloseableHttpResponse resp = null; CloseableHttpClient client = null; CloseableHttpResponse response1 = null;//访问url的response CloseableHttpClient httpclient = null;//访问pic的client RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(defaultSocketTimeout).setConnectTimeout(defaultConnectionTimeout) .build(); try { client = HttpClients.createDefault(); URI uri = new URIBuilder(platformConfiguration.getBaseurl()) .setPath(personUrl.getUploadPic()) .setParameter("personId", personId + "") .setParameter("token", cardLogin.getToken(isExpired)) .build(); post = new HttpPost(uri); httpclient = HttpClients.createDefault(); HttpGet httpGet = new HttpGet(picUrl); httpGet.setConfig(requestConfig); response1 = httpclient.execute(httpGet); HttpEntity entity1 = response1.getEntity(); InputStream input1 = entity1.getContent(); //塞进实体 InputStreamBody inputStreamBody = new InputStreamBody(input1, StringUtils.getFilename(picUrl)); // FileBody file = new FileBody(new File("D:\\aaaa.jpg")); HttpEntity entity = MultipartEntityBuilder.create().setMode(HttpMultipartMode.BROWSER_COMPATIBLE).addPart("file", inputStreamBody).build(); post.setEntity(entity); post.setConfig(requestConfig); resp = client.execute(post); HttpEntity respEntity = resp.getEntity(); String tempResult; if (null != respEntity) { tempResult = EntityUtils.toString(respEntity, Consts.UTF_8); log.info("获取到的返回结果：" + tempResult); result = JSON.parseObject(tempResult); } } catch (Exception e) { log.error("上传图片失败"); log.error(e.getMessage()); e.printStackTrace(); } finally { try { if (null != resp) { resp.close(); } if (null != client) { client.close(); } if (null != httpclient) { httpclient.close(); } if (null != response1) { response1.close(); } } catch (Exception e) { e.printStackTrace(); } }