java安装脚本，java脚本

java安装脚本，java脚本

首先检查java版本：

#!/bin/bash

#check java version
check_jdk(){
	echo "check JAVA version..."
	java_version=`java -version 2>&1 | head -1`
	#java_version=`java -version`
	echo $java_version

	if [[ $java_version =~ "java version " ]] ;
	then 
		echo "Already installed JDK!"
	else
		echo "JDK is not installed!"
		echo "Installing JDK ..."
		#call jdk install script
		. ./shell/jdk_install.sh
	fi
}
check_jdk

安装JDK

#!/bin/bash

#install jdk
jdk_install(){
	echo "JDK install"
	##tar -zxf ./jdk* -C ./downloads/
	tar -zxf ./downloads/jdk* -C ./

	##set environment
	mv jdk1* jdk
	cd ./jdk
	#save the path of jdk
	JAVA_HOME=`pwd`
	echo $JAVA_HOME
	#set jdk environment
	echo "set jdk environment"
	echo -e "\n# added by jdk-feidong" >>~/.bashrc 
	echo "export JAVA_HOME=${JAVA_HOME}" >>~/.bashrc  
	echo 'export JRE_HOME=${JRE_HOME}/jre' >>~/.bashrc  
	echo 'export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib' >>~/.bashrc  
	echo 'export PATH=${JAVA_HOME}/bin:$PATH' >> ~/.bashrc  

	source ~/.bashrc
	#check JAVA version
	echo "check JAVA version..."
	java_version=`java -version 2>&1 | head -1`
	#java_version=`java -version`
	echo $java_version

	if [[ $java_version =~ "java version " ]] ;
	then
		echo "jdk install successfully!"
	else
		echo "jdk install failed"
	fi

	cd ..
}
jdk_install