Whitelabel Error Page This application has no explicit mapping for /error, so you are seeing this as a fallback. Sun Nov 26 18:38:22 GMT+08:00 2017 There was an unexpected error (type=Not Found, status=404). No message available 这是什么错误啊
也有可能是在构建springboot项目时，没有将页面的依赖勾选。
知道了 controller放的位置不对。应该放到启动类里边