centOS安装JDK - 2877206/docs GitHub Wiki
6.JDK http://johnsz.blog.51cto.com/525379/694052 http://tecadmin.net/steps-to-install-java-on-centos-5-6-or-rhel-5-6/
rpm -qa | grep java
--卸载 #rpm -e --nodeps java-1.6.0-openjdk-1.6.0.0-1.7.b09.el5
配置环境变量 <1># vi /etc/profile <2>在最后加入以下几行： export JAVA_HOME=/usr/java/jdk1.6.0_10 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># reboot ← 重启机器配置生效
JDK安装 http://tecadmin.net/steps-to-install-java-on-centos-5-6-or-rhel-5-6/
cd /opt/
wget --no-cookies --no-check-certificate --header "Cookie: gpw_e24=http%3A%2F%2Fwww.oracle.com%2F; oraclelicense=accept-securebackup-cookie" "http://download.oracle.com/otn-pub/java/jdk/7u79-b15/jdk-7u79-linux-i586.tar.gz"
tar xzf jdk-7u79-linux-i586.tar.gz
cd /opt/jdk1.7.0_79/
alternatives --install /usr/bin/java java /opt/jdk1.7.0_79/bin/java 2
alternatives --config java
alternatives --install /usr/bin/jar jar /opt/jdk1.7.0_79/bin/jar 2
alternatives --install /usr/bin/javac javac /opt/jdk1.7.0_79/bin/javac 2
alternatives --set jar /opt/jdk1.7.0_79/bin/jar
alternatives --set javac /opt/jdk1.7.0_79/bin/javac
You also need to setup the "JAVA_HOME" and "JRE_HOME" environment variables:
sudo vi /etc/profile Append the following lines to the original content of the file: