jdk1.8.0 :
https://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html
export JAVA_HOME=/usr/local/src/jdk/jdk1.8
export JRE_HOME=/usr/local/src/jdk/jdk1.8/jre
export PATH=$PATH:$JAVA_HOME/bin
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
maven：
下载：https://maven.apache.org/download.cgi
mkdir -p /usr/local/maven
tar xf apache-maven-3.6.0-bin.tar.gz -C /usr/local/
mv apache-maven-3.6.0/ /usr/local/
vim /etc/profilevim /etc/profile
添加：
#maven
MAVEN_HOME=/usr/local/maven3.6
export MAVEN_HOME
export PATH=${PATH}:${MAVEN_HOME}/bin
source /etc/profile