
通过Xftp 工具上传压缩包到 opt 目录下

tar zxvf jdk-8u281-linux-x64.tar.gzmv jdk1.8.0_281 jdk1.8
vim /etc/profile#java environment
export JAVA_HOME=/opt/jdk1.8
export CLASSPATH=.:${JAVA_HOME}/jre/lib/rt.jar:${JAVA_HOME}/lib/dt.jar:${JAVA_HOME}/lib/tools.jar
export PATH=$PATH:${JAVA_HOME}/bin
source /etc/profile
java -version