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 ......
http://blog.codinglabs.org/articles/theory-of-mysql-index.html
http://www.cnblogs.com/0201zcr/p/5296843.html
https://github.com/iqiancheng/mysql-tutorial/blob/master/chapter3/3.5.md#存储引擎简介
https://git......