@Role of requestparam annotation

@RequestParam:  Bind request parameters to controller On the method parameters ,

                             （ yes springmvc Receive comments for common parameters in ）

    /**
     *  attribute ：1. value： Name in request parameter 
            2. required： Whether this parameter must be provided in the request parameter , The default value is true,true Is mandatory 
            3. defaultValue： The default value is 
     
     * @param status
     * @return
     */
    @PostMapping("user/add") 
    @ResponseBody
    public List<User> add(@RequestParam(value = "status",required = false,defaultValue = "0")Integer status){
        // TODO
        return null;
    }