Linux安裝JDK腳本

介紹

Linux安裝JDK腳本。

系統要求

• Ubuntu及其衍生系統
• Debian及其衍生系統

使用

• 下載JDK
• 保存腳本爲InstallJDK.sh

• 運行

  • 示例
  • sudo bash InstallJDK.sh ~/Downloads/jdk-8u171-linux-x64.tar.gz

腳本

#!/bin/bash
#########################################################################
# File Name: offline-install-jdk.sh
# Author: bovenson
# Email:  szhkai@126.com
# Created Time: 2017-09-19 15:52:15
#########################################################################

# 使用: bash InstallJDK.sh jdk-file.tar.gz

if [[ $EUID -ne 0 ]]; then
   echo "This script must be run as root" 
   exit 1
fi

# 解壓jdk文件
extractFile() {
    destPath="/usr/lib/jvm/${dirName}"    # 解壓目標目錄
    if [ -e $destPath ] ; then
        echo "=============== $destPath exists ==============="
    else
        if [ ! -e /usr/lib/jvm ] ; then
            mkdir -p /usr/lib/jvm
        fi
        echo "=============== Extracting files ==============="
        tar -xzf $filePath -C /usr/lib/jvm/
        echo "=============== Extracting files Done ==============="
    fi

}

# 在Profile中設置PATH
setProfile() {
    if [ -v JAVA_HOME ]; then
        echo "=============== JAVA_HOME setted ==============="
        exit 1
    else
        echo "=============== Setting profile ==============="
        echo "# JDK setting" >> /etc/profile
        echo "export JAVA_HOME=${destPath}" >> /etc/profile
        echo "export CLASSPATH=\$CLASSPATH:.:\$JAVA_HOME/lib:\$JAVA_HOME/jre/lib" >> /etc/profile
        echo "export PATH=\$PATH:\$JAVA_HOME/bin:\$JAVA_HOME/jre/bin" >> /etc/profile
        echo "=============== Setting profile done ==============="
    fi
}

main() {
    source /etc/profile
    extractFile
    setProfile
    echo "=============== ALL DONE ==============="

    # source /etc/profile

    # rm /usr/bin/java
    # rm /usr/bin/javac
    # ln -s /usr/lib/jvm/jdk/bin/java /usr/bin/java
    # ln -s /usr/lib/jvm/jdk/bin/javac /usr/bin/javac



    # # update-alternatives --install /usr/lib/java java /usr/lib/jvm/jdk/bin/java 300  
    # # update-alternatives --install /usr/lib/javac javac /usr/lib/jvm/jdk/bin/javac 300
    # # update-alternatives --config java

    java -version
}

# 檢查輸入文件
if [ ! $# -eq 1 ] ; then    # 參數不正確
    echo "=============================="
    echo "Wrong Parameters."
    echo "Usage: Command JDK-File-Path"
    echo "Example: bash InstallJDK.sh jdk-1.8.11.tar.gz"
    echo "=============================="
elif [ ! -f $1 ] ; then        # 文件不存在
        echo "=============== JDK file doesn't exists ==============="
        exit -1
else                        # 開始安裝
    echo "=============== Begin install JDK ==============="
    filePath=$1                # 文件路徑

    # 獲取解壓後文件夾名稱
    fileNames=($(tar -tf $1))
    dirName=${fileNames%/*}
    main
fi