centos安装jdk

1、创建java文件夹并下载jdk

/usr/local/src/java

wget --no-cookies --no-check-certificate --header "Cookie: gpw_e24=http%3A%2F%2Fwww.oracle.com%2F; oraclelicense=accept-securebackup-cookie" "http://download.oracle.com/otn-pub/java/jdk/8u141-b15/336fa29ff2bb4ef291e347e091f7f4a7/jdk-8u141-linux-x64.tar.gz"

2、解压

tar -zxvf jdk-8u141-linux-x64.tar.gz

3、配置环境变量

vim /etc/profile

JAVA_HOME=/usr/local/src/java/jdk1.8.0_141
CLASSPATH=$JAVA_HOME/lib/
PATH=$PATH:$JAVA_HOME/bin
export PATH JAVA_HOME CLASSPATH

4、让配置文件生效

source /etc/profile

5、查看jdk版本

java -version