Spring boot learning nine

One: After testing, it is found that if the following Controller ( @RequestBody ) is used, the request body of the front-end POST can only be JSON . If it is form-data, X-www-form-urlencoded or XML, it will report 415 Unsupported Media Type error

  @RequestMapping(value = "/users", method = RequestMethod.POST )
    public String addUser(@RequestBody User user, HttpServletRequest request) {
        userService.addUser(user);
        return "OK";
    }

Two: If you want to accept form-data / X-www-form-urlencoded : You can use HttpServletRequest to get parameters using the following methods.

   request.getParameterNames()

   request.getParameter("AA")

   request.getParameterMap()

 @RequestMapping(value = "/users/new", method = RequestMethod.POST )
    public String addUser( HttpServletRequest request) {
        System.out.println(request.getQueryString());
        return "OK";
    }