// 構(gòu)造 post的body內(nèi)容（要post的內(nèi)容，按需定義）
  MultiValueMap<String, String> paramsMap = new LinkedMultiValueMap<>();
  paramsMap.set("grant_type", "password");
  paramsMap.set("username", "yourname");
  paramsMap.set("password", "yourpassword");

  // 構(gòu)造頭部信息(若有需要)
  HttpHeaders headers = new HttpHeaders();
  headers.add("Authorization", "Basic xxxxxx你的認證密鑰");
  // 設(shè)置類型 "application/json;charset=UTF-8"
  headers.setContentType(MediaType.APPLICATION_JSON); 
  
  // 構(gòu)造請求的實體。包含body和headers的內(nèi)容
  HttpEntity<MultiValueMap<String, String>> request = new HttpEntity(paramsMap, headers);
  
  // 聲明 restTemplateAuth（用作請求）
  RestTemplate restTemplateAuth = new RestTemplate(); 
  // 進行請求，并返回數(shù)據(jù) 
  String authInfo = restTemplateAuth.postForObject("http://localhost:8089/oauth/token", request, String.class);

Posting JSON with postForObject

  JSONObject personJsonObject = new JSONObject();
  personJsonObject.put("id", 1);
  personJsonObject.put("name", "John");

  HttpEntity<String> request = new HttpEntity<String>(personJsonObject.toString(), headers);
  String personResultAsJsonStr = restTemplate.postForObject("url", request, String.class);