用restTemplate 的post傳遞參數(shù)時用以下方法設(shè)置：

RestTemplate resetTemplate = new RestTemplate();
MultiValueMap<String, String> requestMap= new LinkedMultiValueMap<String, String>();
requestMap.add("client_id", "123");
requestMap.add("app_code", "abc");
HttpEntity requestEntity = new HttpEntity(requestMap,null);
String responseAsString = resetTemplate.postForObject(url,requestEntity,String.class);

參數(shù)是放在HttpEntity中發(fā)送，與get方法不一樣。如果要post一個json串，則使用如下方式：

RestTemplate resetTemplate = new RestTemplate();
MultiValueMap<String, String> requestMap= new LinkedMultiValueMap<String, String>();
requestMap.add("client_id", "123");
requestMap.add("app_code", "abc");
// 必須加上header說明
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_JSON_UTF8);
Gson gson = new Gson();     
HttpEntity<String> requestEntity = new HttpEntity<String>(gson.toJson(requestMap),headers);
String responseAsString = resetTemplate.postForObject(url,requestEntity,String.class);

這時在服務(wù)器端應(yīng)該用recv(@RequestBody App app)來接收參數(shù)，類App應(yīng)包含屬性client_id,app_code。

如果服務(wù)器端返回的是一個二進制流，則用如下方法處理：

ResponseEntity<byte[]> result = resetTemplate.getForEntity(url,byte[].class);
byte[] data = result.getBody();