centos7 安装jdk1.8

1 上传jdk 到/usr/local下，解压文件  tar -zxvf jdk-8u11-linux-x64.tar.gz

2、配置环境 vi  /etc/profile，在最后添加

export JAVA_HOME=/home/java/jdk1.8.0_11
export CLASSPATH=.:$JAVA_HOME/jre/lib/rt.jar:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export PATH=$PATH:$JAVA_HOME/bin

3使/etc/profile生效

 source /etc/profile

测试

[root@bogon jdk1.8.0_101]# java -version
java version "1.8.0_101"
Java(TM) SE Runtime Environment (build 1.8.0_101-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.101-b13, mixed mode)