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安装1.8的JDK
yum install java-1.8.0-openjdk java-1.8.0-openjdk-devel
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修改配置文件
vim /etc/profile export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.272.b10-1.el7_9.x86_64 export CLASSPATH=.:$JAVA_HOME/jre/lib/rt.jar:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar export PATH=${JAVA_HOME}/bin:${PATH}
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重启配置文件
source /etc/profile
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校验是否安装成功
java -v