下载JDK包
wget https://www.lingx.com/download/jdk-8u151-linux-x64.tar.gz
tar -xzvf jdk-8u151-linux-x64.tar.gz
mkdir /usr/local/java
mv jdk1.8.0_151 /usr/local/java/jdk1.8.0_151
##编辑环境变量文件
vi /etc/profile
##尾部加入以下信息
export JAVA_HOME=/usr/local/java/jdk1.8.0_151
export JAVA_BIN=/usr/local/java/jdk1.8.0_151/bin
export PATH=$PATH:$JAVA_HOME/bin
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
修改配置后，需要指令使配置生效
source /etc/profile
最后检查JDK版本看安装是否成功
java -version