【RestTemplate】使用学习
Url中带参数,request body带json
MultiValueMap<String, String> param = new LinkedMultiValueMap<>(); param.add("appid", "youappid"); param.add("message", "Hello World!"); param.add("sign", "sign"); UriComponentsBuilder builder = UriComponentsBuilder.fromHttpUrl(url).queryParams(param); HttpHeaders httpHeaders = new HttpHeaders(); httpHeaders.setContentType(MediaType.APPLICATION_JSON);//MediaType.TEXT_PLAIN HttpEntity<String> httpEntity = new HttpEntity<>(json, httpHeaders); ResponseEntity<Map> responseEntity = restTemplate.postForEntity(builder.toUriString(), httpEntity, Map.class); log.error("返回状态:" + responseEntity.getStatusCodeValue()); log.error("返回内容:" + responseEntity.getBody()); log.error("返回对象:" + JSONUtil.toJsonStr(responseEntity));
上传文件 multipart/form-data 方式
private String uploadFile(String content) { Random random = new Random(); String tempFileName = UUID.randomUUID().toString().replaceAll("-", "") + random.nextInt(99999); File file = null; try { file = File.createTempFile(tempFileName, ".html"); FileOutputStream fos = new FileOutputStream(file); fos.write(content.getBytes(Charsets.UTF_8)); fos.flush(); fos.close(); MultiValueMap<String, String> param = new LinkedMultiValueMap<>(); param.add("appId", "testappId"); UriComponentsBuilder builder = UriComponentsBuilder.fromHttpUrl("http://www.yousys.com/upload").queryParams(param); HttpHeaders httpHeaders = new HttpHeaders(); httpHeaders.setContentType(MediaType.MULTIPART_FORM_DATA); MultiValueMap<String, Object> body = new LinkedMultiValueMap<>(); body.add("appId", "testappId"); body.add("file", new FileSystemResource(file)); HttpEntity<MultiValueMap<String, Object>> httpEntity = new HttpEntity<>(body, httpHeaders); ResponseEntity<Map> responseEntity = restTemplate.postForEntity(builder.toUriString(), httpEntity, Map.class); Map map = responseEntity.getBody(); // {code=0, msg=操作成功, data={fileURL=20201125143909/ace0bd4d7a80414099100cb34b58495d.html}, isHitCache=0} if ("0".equals(String.valueOf(map.get("code"))) && Objects.nonNull(map.get("data"))) { Map data = (Map) map.get("data"); return String.valueOf(data.get("fileURL")); } } catch (Exception e) { log.error(e.getMessage()); e.printStackTrace(); } finally { if (file != null && file.exists()) { file.delete(); } } return ""; }