mvn command not found in MAC Terminal

1. vi ~/.bash_profile
2. #set JAVA_HOME
JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.7.0_71.jdk/Contents/Home
export JAVA_HOME




M2_HOME=/usr/local/apache-maven/apache-maven-3.3.3
export M2_HOME


PATH=$PATH:$JAVA_HOME/bin:$M2_HOME/bin
export PATH
3. esc
4. :wq
5. source ~/.bash_profile