shell 安装jdk

#!/bin/shfor i in $(rpm -qa | grep jdk | grep -v grep)do  echo "Deleting rpm -> "$i  rpm -e --nodeps $idoneif [[ ! -z $(rpm -qa | grep jdk | grep -v grep) ]];then   echo "-->Failed to remove the defult Jdk."else   rpm -ivh jdk-8u111-linux-x64.rpmfiecho "export JAVA_HOME=/usr/java/jdk1.8.0_111export JAVA_BIN=/usr/java/jdk1.8.0_111/binexport PATH=$JAVA_HOME/bin:$PATHexport CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jarexport JAVA_HOME JAVA_BIN PATH CLASSPATH" >> /etc/profilesource /etc/profileecho "-->JDK environment has been successed set in /etc/profile."