###下载jdk安装包wget http://download.oracle.com/otn-pub/java/jdk/8u121-b13/e9e7ea248e2c4826b92b3f075a80e4
###下载jdk安装包
wget http://download.oracle.com/otn-pub/java/jdk/8u121-b13/e9e7ea248e2c4826b92b3f075a80e441/jdk-8u121-linux-x64.tar.gz###解压安装包
tar -zxvf jdk-8u11-linux-x64.tar.gz###创建java目录
mkdir -p /usr/java/mv jdk1.8.0_11/ /usr/java/###创建软链接
ln -s /usr/java/jdk1.8.0_11/ default 创建默认版本的jdk软链接ln -s /usr/java/default latest 将默认的创建为最新版本的软链接###添加jdk的环境变量
#vim /etc/profileexport JAVA_HOME=/usr/java/defaultexport CLASSPATH=.:$JAVA_HOME/lib:$JAVA_HOME/jre/libexport PATH=$JAVA_HOME/lib:$JAVA_HOME/jre/bin:$PATH:$HOME/bin:$PATHexport JAVA_TOOLS=$JAVA_HOME/lib/tools.jarexport PS1="/[/e]0;/a/]/n/[/e[1;32m/]/[/e[1;33m/]/H/[/e[1;35m/]</$(date +/"%Y-%m-%d %T/")> /[/e[32m/]/w/[/e[0m/]/n/u>//$ " 添加环境变量高亮显示###检查jdk环境是否OK
source /etc/profilesu -lroot># java -versionjava version "1.8.0_11"Java(TM) SE Runtime Environment (build 1.8.0_11-b12)Java HotSpot(TM) 64-Bit Server VM (build 25.11-b03, mixed mode)###JDK升级脚本测试环境jdk1.8.0_11升级，新的jdk安装包放在192.168.91.33:/mfs/ShareFile/software目录中!
要是需要回滚至之前的jdk1.7.0_15的版本，只需要在/usr/java/目录中更改latest软连接的指向即可！
#!/bin/bash #This is an upgrade java script#Written by manbo.xu on 23th,july,2014 SOURCEDIR=/mfs/ShareFile/softwareDESTINATIONDIR=/usr/java echo "Upgrade the java to jdk1.8.0_11" cd $SOURCEDIR [ -e jdk-8u11-linux-x64.tar.gz ] || wget http://download.oracle.com/otn-pub/java/jdk/8u11-b12/jdk-8u11-linux-x64.tar.gzif [ $? -ne 0 ];then echo "-------------ERROR,Skip the Windows-----------------" exit 1 else sleep 3 cd $SOURCEDIR tar -zvxf $SOURCEDIR/jdk-8u11-linux-x64.tar.gz -C $DESTINATIONDIR && chown -R root.root $DESTINATIONDIR/jdk1.8.0_11 cd $DESTINATIONDIR #if [ -f /usr/java/default ];then if [ -L /usr/java/default ];then #-----因为default是链接文件，所以需要用-L或者-h参数来判断 rm -rf /usr/java/default ln -s $DESTINATIONDIR/latest default echo "-----------------default is deleting----------------" else ln -s $DESTINATIONDIR/latest default echo "-----------------default is create------------------" fi cd $DESTINATIONDIR #if [ -f /usr/java/latest ] if [ -h /usr/java/latest ] #-----因为latest是链接文件，所以需要用-L或者-h参数来判断 then rm -rf latest ln -s $DESTINATIONDIR/jdk1.8.0_11 latest echo "----------------Successfully Upgrade java!-----------" else ln -s $DESTINATIONDIR/jdk1.8.0_11 latest echo "----------------latest is create and Upgrade java Successfully------------" fi export JAVA_HOME=/usr/java/default export CLASSPATH=.:$JAVA_HOME/lib/:$JAVA_HOME/jre/lib export PATH=$JAVA_HOME/bin:$PATH: export JAVA_TOOLS=$JAVA_HOME/lib/tools.jar #source /etc/profilefi###测试ok
