现象
执行以下命令
mvn spotless:apply
出现以下报错信息：
Execution default-cli of goal com.diffplug.spotless:spotless-maven-plugin:2.4.2:apply failed: java.lang.Exception: You are running Spotless on JRE 8, which limits you to google-java-format 1.7
[ERROR] If you upgrade your build JVM to 11+, then you can use google-java-format 1.9, which may have fixed this problem.
原因
有一些类编译出错，大概率是合并分之后，有冲突没有解完，再往上会找到这个类。
解决
解决冲突，重新 mvn spotless:apply
