1、下载JDK11
//内网 wget http://static.dev.cqmaze.com/OpenJDK11U-jdk_x64_linux_hotspot_11.0.9.1_1.tar.gz //外网 wget https://static.ourweb.vip/download/OpenJDK11U-jdk_x64_linux_hotspot_11.0.9.1_1.tar.gz内网下载链接
export JAVA_HOME=/jdk-11.0.9.1 export PATH=$JAVA_HOME/bin:$PATH export CLASSPATH=$JAVA_HOME/lib
4、执行 source /etc/profile临时生效，重启生效