Java 环境变量设置 (JAVA_HOME environment variable is not set)

安装Apache Maven 由于 JDK 是yum 安装的并没有 JAVA_HOME 这样的环境变量，那么需要自己手动添加

export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.91-0.b14.el6_7.x86_64/jre
export CLASSPATH=.:$JAVA_HOME/jre/lib/rt.jar:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export PATH=$PATH:$JAVA_HOME/bin

具体的版本自己看 /usr/lib/jvm/

[root@monitoring ~]# mvn -version
Apache Maven 3.3.9 (bb52d8502b132ec0a5a3f4c09453c07478323dc5; 2015-11-10T16:41:47+00:00)
Maven home: /usr/local/apache-maven
Java version: 1.8.0_91, vendor: Oracle Corporation
Java home: /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.91-0.b14.el6_7.x86_64/jre
Default locale: en_US, platform encoding: UTF-8
OS name: “linux”, version: “4.4.0-x86_64-linode63”, arch: “amd64”, family: “unix”