399      阿裏雲  技術社區[雲棲]

ubuntu安裝離線JDK

1、首先上Oracle官網下載JDK

https://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html

2、新建一個安裝文件夾及拷貝源文件到文件夾下並解壓

cd /usr/local
sudo mkdir java  
sudo cp -r  ~/download/jdk-7u51-linux-x64.tar.gz /usr/lib/java         
sudo tar -zxvf jdk-7u51-linux-x64.tar.gz

3、設置環境變量，用gedit打開/etc/profile文件

sudo gedit /etc/profile

export JAVA_HOME=/usr/local/java/jdk1.7.0_51
export JRE_HOME=/usr/local/java/jdk1.7.0_51/jre
export PATH=$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$PATH
export CLASSPATH=$CLASSPATH:.:$JAVA_HOME/lib:$JAVA_HOME/jre/lib

4、將係統默認的jdk修改過來

sudo update-alternatives --install /usr/bin/java java /usr/local/java/jdk1.7.0_51/bin/java 300
sudo update-alternatives --install /usr/bin/javac javac /usr/local/java/jdk1.7.0_51/bin/javac 300

5、查看JDK的版本，看是否安裝成功

java -version

最後更新：2017-04-03 12:55:27

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