JDK1.8.121安装

安装JDK

mkdir -p /usr/local/java

cp /opt/jdk-linux-x64.tar.gz /usr/local/java/

cd /usr/local/java

tar xzvf jdk-linux-x64.tar.gz

rm jdk-linux-x64.tar.gz

vi /etc/profile

添加：

export JAVA_HOME=/usr/local/java/jdk1.8.0_131

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