centOS下配置JDK
1、到oracle.com或者到搜索引擎去搜索一下應該很多地方都可以下載到相應的jdk版本
2、我的下載了JDK1.7.0_79
3、解壓:tar -zxvf jdk-7u79-linux-x64.tar.gz -C /usr/local
4、配置系統變量。在/etc/profile文件末尾加入以下系統變量:
JAVA_HOME=/usr/local/jdk1.0.7_79
JRE_HOME=/usr/local/jdk1.0.7_79
PATH=$JAVA_HOME/bin:$JRE_HOME/bin:$PATH
CLASSPATH=.:$JAVA_HOME/jre/lib/ext:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export JAVA_HOME JRE_HOME PATH CLASSPATH
5、使文件/etc/profile中的環境變量中生效:
[[email protected] local]$ source /etc/profile
6、驗證JDK配置是否正確:
[[email protected] local]$ echo $PATH
/usr/local/jdk1.0.7_79/bin:/usr/local/jdk1.0.7_79/jre/bin:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin:/home/shileelee/.local/bin:/home/shileelee/bin
7、查看JDK版本(在這裏centOS7可能會默認安裝了openJDK1.8)
[[email protected] local]$ java -version
java version "1.7.0_79"
Java(TM) SE Runtime Environment (build 1.7.0_79-b15)
Java HotSpot(TM) 64-Bit Server VM (build 24.79-b02, mixed mode)
centOS下配置JDK