centos7安装jdk8

tar -zxvf 压缩包名

mv jdk1.8 /usr/java

# java_home
export JAVA_HOME=/usr/java
export CLASSPATH=.:${JAVA_HOME}/jre/lib/rt.jar:${JAVA_HOME}/lib/dt.jar:${JAVA_HOME}/lib/tool.jar
export PATH=$PATH:${JAVA_HOME}/bin

source /etc/profile

java -version