在IDEA中编写maven的pom脚本，执行 mvn install -Dmaven.test.skip=true -X，结果却提示"JAVA_HOME"变量设置不正确，具体提示如下：
Failed to execute goal org.apache.maven.plugins:maven-site-plugin:3.0:site (default-site) on project QSProject: Error during page generation: Error rendering Maven report: Unable to find javadoc command:The environment variable JAVA_HOME is not correctly set. ->
解决方案
打开idea的preference-->Maven-->Runner，点击右边的"..."进入编辑对话框，添加进去即可，下面贴出图片：
显示JAVA_HOME 可以参考https://qiancheng.me/post/coding/java-home-export-setup
http://stackoverflow.com/questions/20313453/Java-home-on-osx-with-eclipse-and-maven