操作步骤。
1.在官网链接找到jdk：https://www.oracle.com/java/technologies/javase/javase-jdk8-downloads.html
2.wget https://download.oracle.com/otn/java/jdk/8u261-b12/a4634525489241b9a9e1aa73d9e118e6/jdk-8u261-linux-x64.tar.gz?AuthParam=1596860281_8fa2800da4da3e47f6cbc3215772ae19 3.mv jdk-8u261-linux-x64.tar.gz?AuthParam=1596860281_8fa2800da4da3e47f6cbc3215772ae19 jdk-8u261-linux-x64.tar.gz 4.tar -zxvf jdk-8u261-linux-x64.tar.gz 5.mv jdk1.8.0_261/ /myitem/software/ //我放在了自己定义文件夹下 6.vim /etc/profile 7.将这四行加到末尾 export JAVA_HOME=/myitem/software/jdk1.8.0_261 export JRE_HOME=/myitem/software/jdk1.8.0_261/jre export CLASSPATH=.:$JAVA_HOME/lib:$JRE_HOME/lib:$CLASSPATH export PATH=$JAVA_HOME/bin:$JRE_HOME/bin:$PATH 保存退出
8.source /etc/profile //使配置生效 9.java -version //测试Java安装成功
