-Dmaven.multiModuleProjectDirectory system property is not set. Check $M2_HOME environment variable

-Dmaven.multiModuleProjectDirectory system property is not set. Check $M2_HOME environment variable
解决方法:
window->>properties->>java->>installed JREs
-Dmaven.multiModuleProjectDirectory system property is not set. Check $M2_HOME environment variable

Default VM Arguments中的内容: -Dmaven.multiModuleProjectDirectory=$M2_HOME