CentOS 安装jdk7，centos安装jdk7

CentOS 安装jdk7，centos安装jdk7

1、下载jdk​​

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

选择jdk-7u75-linux-x64.rpm​

2、安装jdk​

新建目录​  mkdir /usr/java​

切换到下载目录  将下载的文件copy到/usr/java​  cp jdk-7u75-linux-x64.rpm /usr/java​

切换到/usr/java​ 修改权限 chmod +x jdk-7u75-linux-x64.rpm​

运行  rpm -ivh jdk-7u75-linux-x64.rpm

3、环境变量配置​

vi /etc/profile

在最后添加：​

#set java environment

export JAVA_HOME=/usr/java/jdk1.7.0_75

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

export PATH=$PATH:$JAVA_HOME/binexport JAVA_HOME CLASSPATH PATH​

保存退出   ：x​

启用环境变量配置：   source /etc/profile

​建立连接：​

cd /usr/bin

ln -s -f /usr/java/jdk1.7.0_75/jre/bin/java

ln -s -f /usr/java/jdk1.7.0_75/bin/javac​

4、检测​

java -version​    javac​