CentOS 7 安装Oracle JDK1.8

$ mkdir -p /opt/Java $ cd /opt/Java # 上传JDK软件包 jdk-8u221-linux-x64.tar.gz $ tar -zxvf jdk-8u221-linux-x64.tar.gz $ rm -rf jdk-8u221-linux-x64.tar.gz $ vim /etc/profile.d/java.sh export JAVA_HOME=/opt/Java/jdk1.8.0_221 export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar export PATH=$JAVA_HOME/bin:$PATH $ source /etc/profile.d/java.sh $ java -version java version "1.8.0_221" Java(TM) SE Runtime Environment (build 1.8.0_221-b11) Java HotSpot(TM) 64-Bit Server VM (build 25.221-b11, mixed mode)