RestTemplate post请求返回状态码415「建议收藏」

大家好，又见面了，我是你们的朋友全栈君。

背景：

跨模块通过post请求调用指定接口，返回415

415状态码解释：

 Unsupported Media Type

对于当前请求的方法和所请求的资源，请求中提交的实体并不是服务器中所支持的格式，因此请求被拒绝

错误日志：

org.springframework.web.client.HttpClientErrorException: 415 null
atorg.springframework.web.client.DefaultResponseErrorHandler.handleError(DefaultResponseErrorHandler.java:86)
at org.springframework.web.client.RestTemplate.handleResponse(RestTemplate.java:708)

功能错误代码和正常代码比对

异常请求返回415:

RestTemplate restTemplate = new RestTemplate();
String url = "http://172.16.17.82/portal/zcm-cmdb/remote/exec";
 String cmd = "mkdir -p /tmp/lushuan/test5";
// 1、异常请求返回 415
 HttpHeaders headers = new HttpHeaders();
 MultiValueMap<String, String> map= new LinkedMultiValueMap<String, String>();
 map.add("host", "172.16.24.220");
 map.add("user", "root");
 map.add("cmd", cmd);
HttpEntity<MultiValueMap<String, String>> request = new HttpEntity<MultiValueMap<String, String>>(map, headers);
Object data = restTemplate.postForObject(url,request,Object.class);
LOGGER.info("TestRestTemplate testInstallCollectdByRemote data = {}", data);

正常代码演示1:

 RestTemplate restTemplate = new RestTemplate();
String url = "http://172.16.17.82/portal/zcm-cmdb/remote/exec";
String cmd = "mkdir -p /tmp/lushuan/test6";
Map<String, String> map = new HashMap<>();
map.put("host","172.16.24.220");
map.put("user","root");
map.put("cmd",cmd);
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_JSON);
HttpEntity<Map<String, String>> request = new HttpEntity<>(map, headers);
JSONObject data = restTemplate.postForObject(url,request, JSONObject.class);
LOGGER.info("TestRestTemplate testInstallCollectdByRemote data = {}", data);

 正常代码演示2:

RestTemplate restTemplate = new RestTemplate();
String url = "http://172.16.17.82/portal/zcm-cmdb/remote/exec";
String cmd = "mkdir -p /tmp/lushuan/test7";
Map<String, String> map = new HashMap<>();
map.put("host","172.16.24.220");
map.put("user","root");
map.put("cmd",cmd);
// ParameterizedTypeReference 该类的目的是启用捕获和传递泛型
ParameterizedTypeReference<String> typeRef = new ParameterizedTypeReference<String>() {
};
JSONObject createDbJsonObject = JSONObject.fromObject(map);
HttpEntity<JSONObject> entityPost = new HttpEntity<JSONObject>(createDbJsonObject);
ResponseEntity<String> createDbResponse = restTemplate.exchange(url, HttpMethod.POST, entityPost,typeRef);
HttpStatus statusCode = createDbResponse.getStatusCode();
LOGGER.info("TestRestTemplate testInstallCollectdByRemote createDbResponse = {}", createDbResponse);
LOGGER.info("TestRestTemplate testInstallCollectdByRemote statusCode = {}", statusCode);

 两段代码的实现方式都可以，推荐第二种，可以获取返回的状态码，是否跨域等信息。