spring restTemplate 用法

        String url = serverUrl+"/path/path?id={id}";
        int i = restTemplate.getForObject(url,int.class,id);

        URI url= UriComponentsBuilder.fromUriString(serverUrl)
                .path("/path/")
                .queryParam("key", key)
                .queryParam("key2",key2)
                .queryParam("key3",key3)
                .build()
                .toUri();
        return restTemplate.getForObject(url,String.class);

            MultiValueMap<String,Object> map = new LinkedMultiValueMap<>();
            map.add("userid",userid);
            map.add("password",password);
            boolean flag = restTemplate.postForObject(loginUrl,map,boolean.class);