带有URL编码数据的Spring RestTemplate POST请求

Question

我是Spring的新手，正在尝试用RestTemplate执行rest请求。Java代码应该执行与下面curl命令相同的操作：

curl --data "name=feature&color=#5843AD" --header "PRIVATE-TOKEN: xyz" "https://someserver.com/api/v3/projects/1/labels"

但服务器拒绝了带有400 Bad request的RestTemplate

RestTemplate restTemplate = new RestTemplate();
HttpHeaders headers = new HttpHeaders();
headers.add("PRIVATE-TOKEN", "xyz");
HttpEntity<String> entity = new HttpEntity<String>("name=feature&color=#5843AD", headers);
ResponseEntity<LabelCreationResponse> response = restTemplate.exchange("https://someserver.com/api/v3/projects/1/labels", HttpMethod.POST, entity, LabelCreationResponse.class);

Answer 1

我认为问题是，当您尝试向服务器发送数据时，没有设置内容类型头，它应该是“application/json”或“application/x-www-form-urlencoded”中的一个。在您的示例中是：基于示例参数（名称和颜色）的“application/x-www-form-urlencoded”。此标头表示“我的客户机发送给服务器的数据类型”。

RestTemplate restTemplate = new RestTemplate();

HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_FORM_URLENCODED);
headers.add("PRIVATE-TOKEN", "xyz");

MultiValueMap<String, String> map = new LinkedMultiValueMap<>();
map.add("name","feature");
map.add("color","#5843AD");

HttpEntity<MultiValueMap<String, String>> entity = new HttpEntity<>(map, headers);

ResponseEntity<LabelCreationResponse> response =
    restTemplate.exchange("https://foo/api/v3/projects/1/labels",
                          HttpMethod.POST,
                          entity,
                          LabelCreationResponse.class);