確保訪問路徑，pom.jar,controller?都沒問題時候?看一下如果你application配置中??后綴配置的是?suffix:?ftl?把這個給注釋了就行?因?yàn)槟J(rèn)就是這個用不著配置

課程里的路徑是ftl/index，你訪問的路徑要和自己的對應(yīng)

Whitelabel Error Page

This application has no explicit mapping for /error, so you are seeing this as a fallback.

Wed Apr 17 18:53:04 CST 2019

There was an unexpected error (type=Not Found, status=404).

No message available

-------報(bào)的是這個錯誤，這是為啥啊