$ vim .bash_profile

在vim打开文件中输入：export JAVA_HOME=$(/usr/libexec/java_home)

$ source.bash_profile

$mvn -version

Apache Maven 3.3.9 (bb52d8502b132ec0a5a3f4c09453c07478323dc5; 2015-11-11T00:41:47+08:00)

Maven home: /usr/local/apache-maven/apache-maven-3.3.9

Java version: 1.7.0_80, vendor: Oracle Corporation

Java home: /Library/Java/JavaVirtualMachines/jdk1.7.0_80.jdk/Contents/Home/jre

Default locale: zh_CN, platform encoding: UTF-8

OS name: "mac os x", version: "10.11.5", arch: "x86_64", family: "mac"