``` mkdir /application/ cd /application/ tar zxf jdk-8u151-linux-x64.tar.gz ln -s jdk1.8.0_151/ jdk sed -i.bak '$a export JAVA_HOME=/application/jdk\nexport PATH=$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$PATH\nexport CLASSPATH=.$CLASSPATH:$JAVA_HOME/lib:$JAVA_HOME/jre/lib:$JAVA_HOME/lib/tools.jar' /etc/profile source /etc/profile java -version ``` 安装在 /opt下 ``` cd /opt/ tar zxf jdk-8u151-linux-x64.tar.gz ln -s jdk1.8.0_151/ jdk sed -i.bak '$a export JAVA_HOME=/opt/jdk\nexport PATH=$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$PATH\nexport CLASSPATH=.$CLASSPATH:$JAVA_HOME/lib:$JAVA_HOME/jre/lib:$JAVA_HOME/lib/tools.jar' /etc/profile source /etc/profile java -version ```