https://computingforgeeks.com/install-java-openjdk-17-on-centos-rhel-7/
sudo yum -y update
sudo yum -y install wget vim
wget https://download.oracle.com/java/17/latest/jdk-17_linux-x64_bin.rpm
sudo yum -y install ./jdk-17_linux-x64_bin.rpm
默认情况下，Java 主目录是
[root@localhost ~] vi /etc/profile
#export JAVA_HOME=/usr/java/jdk1.7.0_80
export JAVA_HOME=/usr/java/jdk1.8.0_212
export CLASSPATH=.:$JAVA_HOME/jre/lib/rt.jar:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
sudo yum -y update
sudo yum -y install wget vim
wget https://download.oracle.com/java/17/latest/jdk-17_linux-x64_bin.rpm
sudo yum -y install ./jdk-17_linux-x64_bin.rpm
默认情况下，Java 主目录是
/usr/lib/jvm/jre-openjdk/
[root@localhost ~] vi /etc/profile
#export JAVA_HOME=/usr/java/jdk1.7.0_80
export JAVA_HOME=/usr/java/jdk1.8.0_212
export CLASSPATH=.:$JAVA_HOME/jre/lib/rt.jar:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar