CentOS 6.5 下安装 Sun JDK 1.7

下载

http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html

得到 jdk-7u51-linux-x64.rpm

卸载Openjava

rpm -qa | grep java*/jdk

通过 rpm -e 命令 或者 rpm -e --nodeps 命令来卸载掉

安装

rpm -ivh jdk-7u71-linux-x64.rpm

设置环境变量

vi + /etc/profile

向文件里面追加以下内容：

在fi 和 export PATH USER LOGNAME MAIL HOSTNAME HISTSIZE HISTCONTROL 之间加入以下代码：

JAVA_HOME=/usr/java/jdk1.7.0_71

JRE_HOME=/usr/java/jdk1.7.0_71/jre

PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/bin

CLASSPATH=:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/lib

export JAVA_HOME JRE_HOME PATH CLASSPATH

使修改生效

[root@localhost ~]# source /etc/profile   //使修改立即生效

[root@localhost ~]# echo $PATH   //查看PATH值

查看系统环境状态

[root@localhost ~]# echo $PATH

.:/usr/java/jdk1.7.0_71/bin:/opt/jdk1.7.0_71/jre/bin:.:/usr/java/jdk1.7.0_71/bin:/opt/jdk1.7.0_51/jre/bin:.:/usr/java/jdk1.6.0_38/bin:/opt/jdk1.7.0_71/jre/bin:.:/usr/java/jdk1.6.0_38/bin:/opt/jdk1.7.0_51/jre/bin:/usr/lib64/qt-3.3/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/usr/java/jdk1.6.0_38/bin:/home/anjubao/apache-tomcat-7.0.55/bin:/root/bin:/usr/java/jdk1.7.0_71/bin:/usr/java/jdk1.7.0_71/jre/bin

查看安装结果

java -version
java version "1.7.0_71"

Java(TM) SE Runtime Environment (build 1.7.0_71-b14)

Java HotSpot(TM) 64-Bit Server VM (build 24.71-b01, mixed mode)