MAC JDK多版本环境切换安装与MavenJAVA_HOME should point to a JDK not a JRE 错误解决

最近电脑重装了系统，各种环境重新配置了一遍

配置maven的时候出现了一点状况

输入mvn -v之后总是报一个提示

The JAVA_HOME environment variable is not defined correctly
This environment variable is needed to run this program
NB: JAVA_HOME should point to a JDK not a JRE

首先输入

vim ~/.bash_profile

进入环境变量的配置

然后将下面的复制粘贴进去

文件位置 ~/.bash_profile

# 设置 JDK 7
export JAVA_7_HOME=`/usr/libexec/java_home -v 1.7`
# 设置 JDK 8
export JAVA_8_HOME=`/usr/libexec/java_home -v 1.8`
 
#默认JDK 8
export JAVA_HOME=$JAVA_8_HOME
 
#alias命令动态切换JDK版本
alias jdk6="export JAVA_HOME=$JAVA_6_HOME"
alias jdk7="export JAVA_HOME=$JAVA_7_HOME"
alias jdk8="export JAVA_HOME=$JAVA_8_HOME"

然后输入

source .bash_profile

使得刚刚配置的环境变量生效

之后再在终端中输入

mvn -v
Maven home: /Library/dev/apache-maven-3.6.3
Java version: 1.8.0_151, vendor: Oracle Corporation, runtime: /Library/Java/JavaVirtualMachines/jdk1.8.0_151.jdk/Contents/Home/jre
Default locale: zh_CN, platform encoding: UTF-8
OS name: "mac os x", version: "10.14.6", arch: "x86_64", family: "mac"

成功显示maven的信息