shell脚本自动安装jdk的方法示例_linux shell_

 #!/bin/bash jdkTargz="/opt/jdk-8u221-linux-x64.tar.gz" # 检查原先是否已配置java环境变量 checkExist(){ jdk1=$(grep -n "export JAVA_HOME=.*" /etc/profile | cut -f1 -d':') if [ -n "$jdk1" ];then echo "JAVA_HOME已配置，删除内容" sed -i "${jdk1}d" /etc/profile fi jdk2=$(grep -n "export CLASSPATH=.*\$JAVA_HOME.*" /etc/profile | cut -f1 -d':') if [ -n "$jdk2" ];then echo "CLASSPATH路径已配置，删除内容" sed -i "${jdk2}d" /etc/profile fi jdk3=$(grep -n "export PATH=.*\$JAVA_HOME.*" /etc/profile | cut -f1 -d':') if [ -n "$jdk3" ];then echo "PATH-JAVA路径已配置，删除内容" sed -i "${jdk3}d" /etc/profile fi } # 查询是否有jdk.tar.gz if [ -e $jdkTargz ]; then echo "— — 存在jdk压缩包 — —" echo "正在解压jdk压缩包..." tar -zxvf /opt/jdk-8u221-linux-x64.tar.gz -C /opt if [ -e "/opt/install/java" ];then echo "存在该文件夹，删除..." rm -rf /opt/install/java fi echo "---------------------------------" echo "正在建立jdk文件路径..." echo "---------------------------------" mkdir -p /opt/install/java/ mv /opt/jdk1.8.0_221 /opt/install/java/java8 # 检查配置信息 checkExist echo "---------------------------------" echo "正在配置jdk环境..." sed -i '$a export JAVA_HOME=/opt/install/java/java8' /etc/profile sed -i '$a export CLASSPATH=.:$JAVA_HOME/jre/lib/rt.jar:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar' /etc/profile sed -i '$a export PATH=$PATH:$JAVA_HOME/bin' /etc/profile echo "---------------------------------" echo "JAVA环境配置已完成..." echo "---------------------------------" echo "正在重新加载配置文件..." echo "---------------------------------" source /etc/profile echo "配置版本信息如下：" java -version else echo "未检测到安装包，请将安装包放到/opt目录下" fi