restTemplate提交form表单参数

　　直接上代码：

public String transferData(String qrCode, String uuid){
 MultiValueMap<String, String> mulmap = new LinkedMultiValueMap<>();
            mulmap.add("QrCode", qrCode);
            mulmap.add("key", uuid);
            HttpHeaders headers = new HttpHeaders();
            headers.setContentType(MediaType.APPLICATION_FORM_URLENCODED);
            ResponseEntity<String> result = null;
            HttpEntity<MultiValueMap<String, String>> request = new HttpEntity<>(mulmap, headers);
　　　　 //执行HTTP请求
　　　　 result = restTemplate.exchange(url, HttpMethod.POST, request, String.class);
}