SpringBoot This application has no explicit mapping for /error, so you are seeing this as a fallback
问题
Root Cause :在SpringBoot的主类XXXApplication.java 添加了@ComponentScan里面配置错误
解决办法有多种
Append
参考链接
SpringBoot This application has no explicit mapping for /error, so you are seeing this as a fallback
问题
启动SpringBoot的时候访问端口出现该页面；

Root Cause :在SpringBoot的主类XXXApplication.java 添加了@ComponentScan里面配置错误
我
@ComponentScan(basePackages = {"cn.xxx.xxx.science.dao"})
因此扫描不到Controller的相关内容

解决办法有多种
去掉这个@ComponentScan，这样XXXApplication.java 会自动扫描 ，spring-boot会自动加载启动类所在包下及其子包下的所有组件。
ComponentScan 配置为XXXApplication.java packages @ComponentScan(basePackages = {"cn.xxx.xxx.science"})
Append
这个错误很常见，我这里只是列出了我所遇到的情况，具体问题具体分析

参考链接
异常:This application has no explicit mapping for /error, so you are seeing this as a fallback.