出现Unsupported major.minor version 52.0以及java.lang.UnsupportedClassVersionError
When the jdk used by the project is often different from the jdk at runtime, there are two options.
1. Modify the jdk environment in the project (I have modified it many times, but the exported project still doesn't work, and I don't know why)
2. Modify the jdk environment in linux
https://www.cnblogs.com/jiu0821/p/7672395.html#undefined
About how to change the jdk environment in linux as above