springboot version:2.1.9-RELEASE
解决方案:
在pom中添加此段 完美解决,代码的作用是让src/main/webapp在编译的时候在resoureces路径下也生成webapp的文件
<build>
<resources>
<resource>
<directory>src/main/webapp</directory>
<targetPath>META-INF/resources</targetPath>
<includes>
<include>**/**</include>
</includes>
</resource>
</resources>
</build>