当我尝试使用RestTemplate将API请求发送到URL时，当前遇到此错误。我以前曾使用此相同方法从类似的API URL获取不记名令牌（即https://sometesturl.com/v1/gettoken），虽然那个操作是GET，而这个操作是POST。我搜索了一些帖子，大多数都认为它与HttpHeaders中的authorization字段有关，因此，我尝试添加/删除字符串“Bearer“，但没有成功。
以下是日志：

org.springframework.web.client.HttpClientErrorException$Unauthorized: 401 Unauthorized: [no body]
    at org.springframework.web.client.HttpClientErrorException.create(HttpClientErrorException.java:105) ~[spring-web-5.3.4.jar:5.3.4]

已尝试调试，调试工具中似乎没有任何异常。. x1c 0d1x
以下是相关的代码段，欢迎提供帮助：

//Prepare request header
        HttpHeaders headers = new HttpHeaders();
        headers.add("Authorization", (bearerToken));
        //for above, I have also tried headers.add("Authorization", ("Bearer "+bearerToken));

        headers.add("accept", "application/json");
        headers.add("content-type", "application/json");
        MediaType mediaType = MediaType.APPLICATION_JSON;
        headers.setContentType(mediaType);

        //Prepare request body
        HttpEntity<String> entity = new HttpEntity<>("{\"test\":\"test\"}", headers);

        //Build API url
        String url = "https://sometesturl.com/v1/search";
        UriComponentsBuilder uriBuilder = UriComponentsBuilder.fromHttpUrl(url);
        Integer timeoutConnectToken = Integer.valueOf("0");

        //Send request to essDocs api
         RestTemplate restTemplate = getRestTemplate(timeoutConnectToken);
         ResponseEntity<String> response = null;
         try {
                 response = restTemplate.exchange(uriBuilder.build().toUriString(), HttpMethod.POST, entity, String.class);
logger.info("Received Search API Response : {}", response);
             }    catch (ResourceAccessException e) {
                 logger.error("ResourceAccessException: {}", e.getMessage());
             }    catch (Exception e) {
                 logger.error("Error querying REST API: {}, {}", e.getMessage(), e);
             }