RestTemplate client = new RestTemplate();
                HttpHeaders headers = new HttpHeaders();
            //定义请求参数类型，这里用json所以是MediaType.APPLICATION_JSON
            headers.setContentType(MediaType.MULTIPART_FORM_DATA);
//            Map<String, Object> map = new HashMap<String, Object>();
//            map.put("infohash", "1111111");
//            map.put("name", "肖申克的救赎12");
//            map.put("id", 111111);
//            map.put("size", 111111);
            //HttpEntity<Map<String, Object>> request = new HttpEntity<Map<String, Object>>(map, headers);
            MultiValueMap<String,Object> params = new LinkedMultiValueMap<>();
            params.add("infohash",infohash.getInfoHash());
            params.add("name", infohash.getName());
            params.add("id", infohash.getId());
            params.add("size", infohash.getLength());
            ResponseEntity<String> entity = client.postForEntity("http://localhost:9527/magnet/infohash/setdata", params, String.class);
            //获取3方接口返回的数据通过entity.getBody();它返回的是一个字符串；
            String body = entity.getBody();