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                ![](https://cdn.zimug.com/wx-zimug.png) ## 下載 oracle 官網無法通過wget下載,我用的是jdk-8u191-linux-x64.tar.gz,自己去下載吧。如果覺得自己下載不到JDK,你可能不適合學習本文檔。 ## 解壓 上傳到阿里云主機,然后解壓安裝。sn建立連接,相當于windows建一個“桌面快捷方式” ```bash sudo mkdir /usr/local/java sudo tar -xzvf?jdk-8u191-linux-x64.tar.gz -C /usr/local/java sudo ln -sv?? /usr/local/java/jdk1.8.0_191 /usr/local/java/default? ``` 上面命令,你要根據你自己的JDK版本號去調整。 ## 環境變量配置 使用`vim /etc/profile` 打開配置文件,尾部加上如下的三行: ```bash export JAVA_HOME=/usr/local/java/default export CLASSPATH=.:${JAVA_HOME}/lib export PATH=${JAVA_HOME}/bin:$PATH ``` 執行`source ?/etc/profile`使上述的修改生效。然后`java -version`,顯示如下表示JDK安裝成功。 ![](https://img.kancloud.cn/90/44/9044f7cd68177a98ec97c79a9b344769_772x88.png)
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