POST / GET request and RequestParam application scenario RequestBody

When the POST request
@RequestBody -> JSON string portion
@RequestParam -> request parameter part
application / json pattern of FIG.

 

Figure a .png

form-data, x-www-form-urlencoded pattern of FIG.

 

Figure II .png

 

1, from the content-type aspects summarized:
① Data-form, X-form-urlencoded WWW-: not use @RequestBody; can @RequestParam. See postman pattern, when these two approaches are not json string section.
② application / json: json string portion may be @RequestBody; url the back parameters can @RequestParam?. See the pattern postman

2, from two kinds of ways summary notes:
@RequestBody

(@RequestBody Map map)
(@RequestBody Object object) application/json时候可用 form-data、x-www-form-urlencoded时候不可用 

@RequestParam

(@RequestParam Map map)
application/json时候，json字符串部分不可用，url中的?后面添加参数即可用，见图一 form-data、x-www-form-urlencoded时候可用，但是要将Headers里的Content-Type删掉 

(@RequestParam String waterEleId,
@RequestParam String enterpriseName) application/json时候，json字符串部分不可用，url中的?后面添加参数即可用，见图一 form-data、x-www-form-urlencoded时候可用，且参数可以没有顺序（即前端传过来的参数或者url中的参数顺序不必和后台接口中的参数顺序一致，只要字段名相同就可以），但是要将Headers里的Content-Type删掉 

(@RequestParam Object object)
不管application/json、form-data、x-www-form-urlencoded都不可用 

Neither @RequestBody nor @RequestParam, which receives no parameter is specified way

(Map map)
(Object object) application/json时候：json字符串部分不可用，url中的?后面添加参数不可用。 因为没有指定，它也不知道到底是用json字符串部分还是?后面添加参数部分，所以干脆都不可以用 form-data、x-www-form-urlencoded时都不可用，见图二 (HttpServletRequest request) application/json不可用 form-data、x-www-form-urlencoded时可用 

GET request
@RequestBody

RequestBody -- Map / Object
GET请求中不可以使用@RequestBody

@RequestParam

(@RequestParam Map map)
在url中的?后面添加参数即可使用

(@RequestParam String waterEleId,
@RequestParam String enterpriseName) 在url中的?后面添加参数即可使用 

(@RequestParam Object object)
GET请求中不可以使用

When using a GET request by adding postman? Behind the argument, do not own a fight in a url, click the Params, in the following key-value input is automatically spliced ​​to the url

 

GET request to add parameters after the question mark .png

For chestnuts
upload a file that contains a figure out of the two-part ring

 

Figure II .png

If so, there is no @RequestParam, then the parameter url? After you get

 

@RequestMapping(value = "/leadingIn", method = RequestMethod.POST) public ResponseObj<Boolean> leadingIn(Map formData, HttpServletRequest request, Map<String, InputStream> files) { } 

如果control中这样接收，本来想formData只接收url?后的参数，结果将{ "retCode": null, "data": true }这部分内容也拿到了，真实意外之喜。字符串这部分内容还可以从request中取到，见下面完整方法。

@RequestMapping(value = "/leadingIn", method = RequestMethod.POST) public ResponseObj<Boolean> leadingIn(@RequestParam Map formData, HttpServletRequest request, Map<String, InputStream> files) { } 

完整方法

    /**
     * 导入
     */
    @RequestMapping(value = "/leadingIn", method = RequestMethod.POST) public ResponseObj<Boolean> leadingIn(@RequestParam Map formData, HttpServletRequest request, Map<String, InputStream> files) { //测试 try { MultipartHttpServletRequest mulRequest = (MultipartHttpServletRequest) request; Set<Map.Entry<String, MultipartFile>> set = mulRequest.getFileMap().entrySet(); Map<String, InputStream> listFile = new LinkedHashMap<>(); System.out.println("个数" + set.size()); for (Map.Entry<String, MultipartFile> each : set) { String fileName = each.getKey(); MultipartFile file = each.getValue(); //这里需要上传FTP try { listFile.put(fileName, file.getInputStream()); } catch (Exception ex) { return new ResponseObj<>(false, null); } } String formjson = mulRequest.getParameter("content"); ObjectMapper mapper = new ObjectMapper(); mapper.setVisibility(PropertyAccessor.FIELD, JsonAutoDetect.Visibility.ANY); mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false); // boolean result = iInstallWorkOrder.upLoadFile(listFile); boolean result = true; return new ResponseObj<>(result, null); } catch (Exception ex) { System.out.println(ex.toString()); return new ResponseObj<>(false, null); } } 

 

 

作者：墨色尘埃
链接：https://www.jianshu.com/p/4981911d5e15