Hadoop安装jdk,maven,ant,配置环境变量，验证的操作方法和步骤是什么？

复制代码
[root@node100 software]# tar -zxf jdk-7u80-linux-x64.tar.gz -C /opt/module/
[root@node100 software]# tar -zxvf apache-maven-3.1.1-bin.tar.gz -C /opt/module/
[root@node100 software]# tar -zxvf apache-ant-1.9.9-bin.tar.gz -C /opt/module/
[root@node100 software]# vi /etc/profile
#JAVA_HOME
export JAVA_HOME=/opt/module/jdk1.7.0_80
export PATH=$PATH:$JAVA_HOME/bin
#MAVEN_HOM
export MAVEN_HOME=/opt/module/apache-maven-3.1.1
export PATH=$PATH:$MAVEN_HOME/bin
#ANT_HOME
export ANT_HOME=/opt/module/apache-ant-1.9.11
export PATH=$PATH:$ANT_HOME/bin
[root@node100 software]#source /etc/profile
java -version
mvn -version
ant -version