Maven拒绝Java主目录

Question

I followed the instructions to point Maven to the appropriate JDK via a /etc/mavenrc file detailed here: How to change maven java home

When I then try to run maven, it fails, citing that the Java home directory is improperly defined because it's a directory.

mvn --version /etc/mavenrc: line 1: /Library/Java/JavaVirtualMachines/jdk1.8.0_121.jdk/Contents/Home: is a directory 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

My understanding is that Java_Home is supposed to be a directory. Why is it refusing to use the appropriate directory?

Answer 1

On a Mac the $HOME/.mavenrc file should contain a JAVA_HOME declaration like in a shell script.

ravn$ cat ~/.mavenrc 
JAVA_HOME=/Users/ravn/Downloads/zulu7.22.0.3-jdk7.0.171-macosx_x64
ravn$ 

This is a nice feature which is not very well documented.

Answer 2

I have the same problem and have been trying to solve it for an hour. I have JAVA_HOME pointed to the correct jdk location by using the following line but still has this problem.

export JAVA_HOME=$(/usr/libexec/java_home)

How I fix it finally is to paste the same line above to .mavenrc