解决-Dmaven.multiModuleProjectDirectory system property is not set

【】解决-Dmaven.multiModuleProjectDirectory system property is not set. Check $M2_HOME environment variable and mvn script match.
1.添加M2_HOME的环境变量

　　2.Preference->Java->Installed JREs->Edit 选择一个jdk,

　　在default vm arguments：添加 -Dmaven.multiModuleProjectDirectory=$M2_HOME