1,系统版本查看
2,下载jdk1.8
wget http://download.oracle.com/otn-pub/java/jdk/8u144-b01/090f390dda5b47b9b721c7dfaa008135/jdk-8u144-linux-i586.tar.gz?AuthParam=1505986442_8c0fe3d7c43529867d7ea07ee729829b
3,在/usr/目录下创建java目录
mkdir/usr/java
把下载的jdk放在这个目录然后解压
tar -xf jdk-8u144-linux-i586.tar.gz
4,配置环境变量
vim /etc/profile
在结尾添加
export JAVA_HOME=/usr/local/java/jdk1.8.0_144
export CLASSPATH=.:$JAVA_HOME/jre/lib/rt.jar:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export PATH=$PATH:$JAVA_HOME/bin
设置生效 source /etc/profile
查看
java -version
PS:openjdk的查看 yum search openjdk
openjdk的安装 yum install java-1.8.0-openjdk java-1.8.0-openjdk-devel