統一異常管理：報錯EL1007E: Property or field 'message' cannot be found on null

根據博客教程 http://blog.didispace.com/springbootexception/ 編寫demo，啓動應用訪問 http://localhost:8080/hello 報錯： org.springframework.web.util.NestedServletException: Request processing failed; nested exception is

>>阅读原文<<