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Centos7下安装jdk方法代码

centos7默认下不带有jdk环境,需要我们自己手动添加和配置。
下面是小编用的方法,遇到什么问题大家可以在下方留言,

01.上传jdk到centos下 /usr/local(.tar.gz压缩版本的jdk)
02.检查当前linux系统上是否有jdk,linux命令:rpm -qa | grep java
03.继续安装,新建/usr/local/java,命令:mkdir -p /usr/local/java
04.把jdk解压到java目录下,命令:tar -zxvf /usr/local/jdk-8u162-linux-x64.tar.gz -C /usr/local/java
05.进入java文件夹下,命令:cd java,ll 查看当前文件夹
06.配置java的环境变量:命令:vim /etc/profile
07.按 i 进入插入模式,在配置文件的最下方加上:
  export JAVA_HOME=/usr/local/java/jdk1.8.0_191(具体看文件夹名称)
  export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
  export PATH=$PATH:$JAVA_HOME/bin
08.按 esc 退出插入模式,之后再输入 :wq 保存当前修改
09.输入 source /etc/profile 配置环境生效
10.在控制台输入 java 测试jdk的安装情况,输入 java -version 查看当前jdk的版本
11.安装配置成功
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