一、Java環境的配置安裝
1、新建Java安裝目錄。
[root@localhost ~]# mkdir /opt/java
2、下載jdk安裝包。
wget --no-cookies --no-check-certificate http://download.oracle.com/otn-pub/java/jdk/8u60-b27/jdk-8u60-linux-x64.tar.gz
3、解壓安裝包，授已執行權限。
[root@localhost java]# tar xzvf jdk-8u60-linux-x64.tar.gz
[root@localhost java]# ls
jdk1.8.0_60 jdk-8u60-linux-x64.tar.gz
[root@localhost java]# chmod -R 755 jdk1.8.0_60/
二、設置環境變量
1、修改配置文件/etc/profile在文件的末尾加入如下的信息：
JAVA_HOME=/opt/java/jdk1.8.0_60
CLASSPATH=$CLASSPATH:$JAVA_HOME/lib:$JAVA_HOME/jre/lib
PATH=$PATH:$JAVA_HOME/bin:$JAVA_HOME/jre/bin
export JAVA_HOME JAVA_BIN PATH CLASSPATH
2、使配置文件生效
[root@localhost java]#. /etc/profile
3、驗證：
[root@localhost java]# java -version
java version "1.8.0_60"
Java(TM) SE Runtime Environment (build 1.8.0_60-b27)
Java HotSpot(TM) 64-Bit Server VM (build 25.60-b23, mixed mode)
[root@localhost java]# echo $JAVA_HOME
/opt/java/jdk1.8.0_60
[root@localhost java]# echo $CLASSPATH
:/opt/java/jdk1.8.0_60/lib:/opt/java/jdk1.8.0_60/jre/lib
[root@localhost java]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin:/opt/java/jdk1.8.0_60/bin:/opt/java/jdk1.8.0_60/jre/bin