httpclientror在获取请求rest模板

Question

当我尝试执行GET请求时，我不断收到以下异常。对url的直接curl请求可以正常工作，但实际上不行。我正在尝试从端口8082上的服务调用端口8085上的服务。

密码

ResponseEntity<List<String>> quoteResponse = restTemplate.exchange("http://localhost:8085/rest/test/{username}", HttpMethod.GET,
        null, new ParameterizedTypeReference<List<String>>() {
        },userName);

卷曲

curl 'http://localhost:8082/rest/test/user1' -H "Content-Type: application/json"

错误

org.springframework.web.client.HttpClientErrorException$NotFound: 404 : [<Map><timestamp>2020-06-18T23:35:31.449+00:00</timestamp><status>404</status><error>Not Found</error><message></message><path>/rest/test/user1</path></Map>]
    at org.springframework.web.client.HttpClientErrorException.create(HttpClientErrorException.java:113) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.web.client.DefaultResponseErrorHandler.handleError(DefaultResponseErrorHandler.java:184) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.web.client.DefaultResponseErrorHandler.handleError(DefaultResponseErrorHandler.java:125) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
    at org.springframework.web.client.ResponseErrorHandler.handleError(ResponseErrorHandler.java:63) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]

Answer 1

问题似乎是端口8081工作正常。所以8082和8085之间似乎存在一些连接问题。对我来说很奇怪。

Answer 2

请求头“Content-Type:application/json”在哪里

HttpHeaders httpHeaders = new HttpHeaders();
httpHeaders.setContentType(MediaType.APPLICATION_JSON);
HttpEntity<JSONObject> req = new HttpEntity<>(new HashMap(), httpHeaders);
ResponseEntity<List<String>> quoteResponse = restTemplate.exchange("http://localhost:8085/rest/test/{username}", HttpMethod.GET,
        req, new ParameterizedTypeReference<List<String>>() {
        },userName);