一.卸载自带JDK
1.查看信息
[root@HTML5 java]# rpm -qa | grep jdk
java-1.6.0-openjdk-1.6.0.0-1.45.1.11.1.el6.x86_64
2.卸载
[root@HTML5 java]# rpm -e --nodeps java-1.6.0-openjdk-1.6.0.0-1.45.1.11.1.el6.x86_64
[root@HTML5 java]# java -version
bash: /usr/bin/java: 没有那个文件或目录
二.安装JDK
1.下载JDK安装包,地址:
http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html
2.执行安装
[root@HTML5 java]# rpm -ivh jdk-7u60-linux-x64.rpm
Preparing... ########################################### [100%]
1:jdk ########################################### [100%]
Unpacking JAR files...
rt.jar...
jsse.jar...
charsets.jar...
tools.jar...
localedata.jar...
jfxrt.jar...
3.配置环境变量
[root@HTML5 etc]# vim profile
在最下面添加:
export JAVA_HOME=/usr/java/jdk1.7.0_60
export PATH=$JAVA_HOME/bin:$PATH
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
[root@HTML5 etc]# source /etc/profile
4.检查是否配置正确
[root@HTML5 jdk1.7.0_60]# echo $JAVA_HOME
/usr/java/jdk1.7.0_60
[root@HTML5 jdk1.7.0_60]# echo $PATH
/usr/java/jdk1.7.0_60/bin:/usr/lib64/qt-3.3/bin:/usr/local/sbin:/usr/sbin:/sbin:/usr/local/bin:/usr/bin:/bin:/root/bin
[root@HTML5 jdk1.7.0_60]# echo $CLASSPATH
.:/usr/java/jdk1.7.0_60/lib/dt.jar:/usr/java/jdk1.7.0_60/lib/tools.jar