错误：
Whitelabel Error Page
This application has no explicit mapping for /error, so you are seeing this as a fallback.
Fri Dec 20 18:06:08 CST 2019
There was an unexpected error (type=Internal Server Error, status=500).
org/unbescape/html/HtmlEscape
java.lang.NoClassDefFoundError: org/unbescape/html/HtmlEscape
解决办法：
来源：CSDN
作者：IT明
链接：https://blog.csdn.net/weixin_41685207/article/details/103636896