centos 安装 jdk1.8

1.下载 jdk1.8到 https://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.htmljdk-8u181-linux-x64.tar.gz2.解压[root@centos7 ~]# tar -zxvf jdk-8u181-linux-x64.tar.gz3.拷贝 j...

1.下载 jdk1.8

到 https://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html

jdk-8u181-linux-x64.tar.gz

2.解压

[root@centos7 ~]# tar -zxvf jdk-8u181-linux-x64.tar.gz

3.拷贝 

jdk-8u181-linux-x64  到/usr/目录

4.配置

[root@centos7 usr]# vi /etc/profile

尾部追加

export JAVA_HOME=/usr/jdk1.8
export CLASSPATH=.:$JAVA_HOME/jre/lib/rt.jar:$JAVA_HOME/jre/lib/dt.jar:$JAVA_HOME/jre/lib/tools.jar
export PATH=$PATH:$JAVA_HOME/bin

5.生效

生效命令：source /etc/profile