java利用MultiValueMap提交post请求的form-data参数

女爷i 2021-07-26 21:37 2322阅读 0赞

大部分时间都是'Content-Type': 'application/json'，flask\_appbuilder的服务中很多接口是 multipart/form-data;,

![20200907202602661.png][]![20200907202612664.png][]

用python调用时，通常情况下

data = json.dumps({ "catalogCode":"region","pageNo": 1, "pageSize": 1000})
    headers = {'Token': Token, 'Accept': 'application/json', 'Content-Type': 'application/json;charset=utf-8'}
    r = requests.post(user_url, headers=headers, data=data)

form-data时需要如下

data =\{ "catalogCode":"region","pageNo": 1, "pageSize": 1000\}  
headers = \{'Token': Token\}

r = requests.post(user\_url, headers=headers, data=data)

但是在java中，不只是改为'Content-Type': 'multipart/form-data'

还需要用MultiValueMap

HttpEntity entity = new HttpEntity(req.getRequestBody(), headers);
    
     HttpEntity<MultiValueMap<String, String>> entity = new HttpEntity<>(map, headers);
    ResponseEntity response = restTemplate.exchange(url, httpMethod, entity, respTypes)
    if (response != null) {
                        int status = response.getStatusCode().value();
                        rsp.setStatus(status);
                        HttpHeaders rspHeaders = response.getHeaders();
                        if (rspHeaders != null) {
                            Map<String, String> rspHeaderMap = new HashMap<>(8);
                            for (Map.Entry<String, List<String>> entry : rspHeaders.entrySet()) {
                                rspHeaderMap.put(entry.getKey(), entry.getValue().toString());
                            }
                            rsp.setHeader(rspHeaderMap);
                        }
                        rsp.setBody(response.getBody());

这里要改为

LinkedHashMap linkedHashMap= (LinkedHashMap)req.getRequestBody();
                headers.setContentType(MediaType.APPLICATION_FORM_URLENCODED);
                MultiValueMap<String, Object> map = new LinkedMultiValueMap<>();
                Iterator it = linkedHashMap.entrySet().iterator();
                while (it.hasNext()){
                    Map.Entry entry = (Map.Entry)it.next();
                    map.add((String)entry.getKey(),entry.getValue());
                }
    
                HttpEntity<MultiValueMap<String, Object>> entity = new HttpEntity<>(map, headers);
    //            HttpEntity<MultiValueMap<String, String>> entity = new HttpEntity<>(map, headers);
    
                ParameterizedTypeReference<BaseResponse> respTypes = new ParameterizedTypeReference<BaseResponse>() {};
    
                try {
                    RestTemplate rt = new RestTemplate();
    
                    BaseResponse response =rt.postForObject("http://127.0.0.1:8550/edit/12",
                            entity, BaseResponse.class);

[20200907202602661.png]: https://img-blog.csdnimg.cn/20200907202602661.png
[20200907202612664.png]: /images/20210726/602047d5ec3e41bfac03720b78b654b4.png