今天通过brew安装ant时，安装完之后执行ant -version出现

Error: JAVA_HOME is not defined correctly executing maven

网上查了资料发现是配置环境变量的问题特此记录

Assuming you use bash shell and installed Java with the Oracle installer, you could add the following to your .bash_profile

export JAVA_HOME=$(/usr/libexec/java_home)
export PATH=$JAVA_HOME/jre/bin:$PATH

This would pick the correct JAVA_HOME as defined by the Oracle installer and will set it first in your $PATH making sure it is found.

Also, you don't need to change it later when updating Java.