Java中POST、GET、@RequestBody和@RequestParam区别详析

   @PostMapping("/ali-receive")
    public void aliReceive(@RequestParam("message") String message) {
                ReceiveLog receiveLog = JSON.parseObject(message, ReceiveLog.class);
 
    }

       const message = {
            "data": {
                "userInfo": "2804951212",
                "offerId": offerId,
                "action": "distribution",
                "categoryNav": categoryNav
            },
            "gmtBorn": time,
            "msgId": time,
            "type": "PRODUCT_COLLECTION",
            "userInfo": "chrome"
     
        };
        
        $.ajax({
            contentType :'application/x-www-form-urlencoded',
            type:'post',
            url: baseUrl+'/ali-receive',
            data:"message="+JSON.stringify(message)
        });

   @PostMapping("/ali-receive")
    public void aliReceive(@RequestParam("message") String message) {
                ReceiveLog receiveLog = JSON.parseObject(message, ReceiveLog.class);

    }

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

(@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，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
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

(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

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

(@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

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

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

    /**
     * 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);
        }
 
    }