一、下载jdk

参考:http://www.codingyun.com/article/40.html

可以先下载到本地,然后ftp到服务器

也可以直接在服务器下载(windows版本的区分32位与64位,ubuntu(linux)版本的不区分)

http://download.oracle.com/otn-pub/java/jdk/8u65-b17/jdk-8u65-linux-x64.tar.gz?AuthParam=1447866593_14c651521d060c106fe19b59b69722e4

 
   

有问题(wget 得到的只是网页 5037什么的),可以参考:http://www.cnblogs.com/1995hxt/p/4976436.html,后边的AuthParam自己F12获取

   

二、解压安装

先解压

 
1
tar zxvf jdk-8u65-linux-x64.tar.gz -C /usr/java/

然后改名为java7

 
1
cd /usr/java/
 
1
mv jdk1.8.0_xx java8

三、配置环境变量

 
1
vi ~/.bashrc

在最后面加上如下四句

 
1
2
3
4
export JAVA_HOME=/usr/java/java8
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH

保存后退出vi 刷新变量使配置立即生效

 
1
source ~/.bashrc

进入tomcat的bin目录

 
1
cd $CATALINA_HOME/bin

四、测试

snowdream@snowdream:~$ java -version

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" 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