application/json
ajax請求中content-type:application/json代表參數以json字符串傳遞給后台,controller接收需要@RequestBody 接收參數 例如:@RequestBody Map<String, Object> map,也可以使用類接收@RequestBody User user
application/x-www-form-urlencoded
ajax請求中content-type:application/x-www-form-urlencoded代表參數以鍵值對傳遞給后台,controller接收可以單個參數接收,如@RequestParam("param") String param;也可以用類接收User user,