Daizc
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[WSL2]子系统ubuntu安装jdk8

[WSL2]子系统ubuntu安装jdk8

这是个大坑 平时装个JDK这么简单的事 在WSL上问题还真不少

安装环境

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适用于 Linux 的 Windows 子系统:
Ubuntu-18.04 (默认)

以前都是用的centos,直接yum localinstall ./jdk-???-linux-x64.rpm就可以安装本地的RPM包了。
但是现在使用的Ubuntu,只能安装DEB包,查询了一下有三种安装方式:

  • RPM包转制为DEB包
  • 使用开箱即用的tar.gz并配置环境变量
  • 使用ppa源安装

开始安装

很明显使用ppa源安装更稳定不容易遇到问题,参考了此文章
Install Oracle Java 8 (JDK8 and JRE8) in Ubuntu or Linux Mint

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sudo add-apt-repository ppa:webupd8team/java    //添加PPA源
sudo apt-get update //更新本地包
sudo apt-get install oracle-java8-installer //安装JDK

// 很遗憾报错了

root@DESKTOP-UFOJIL7:/wsl_share# apt-get install oracle-java8-installer
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package oracle-java8-installer is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'oracle-java8-installer' has no installation candidate

在这里找到了答案
Oracle-Java8-Installer: No installation candidate

> NOTE: This answer no longer works, as the WebUpd8 PPA has been deprecated since Oracle has changed licensing and access restrictions to the Oracle Java codebase. Details at http://www.webupd8.org/2014/03/how-to-install-oracle-java-8-in-debian.html

翻译一下

>注意:此答案不再有效,因为WebUpd8 PPA已被弃用,因为Oracle已将许可和访问限制更改为Oracle Java代码库。 有关详细信息, 请访问http://www.webupd8.org/2014/03/how-to-install-oracle-java-8-in-debian.html

既然如此,那没啥办法只能手动安装一个了

手动配置

首先下载一个jdk-8u221-linux-x64.tar.gz,拷贝到wsl_share中

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root@DESKTOP-UFOJIL7:/wsl_share# tar -zxvf ./jdk-8u221-linux-x64.tar.gz      //首先解压
root@DESKTOP-UFOJIL7:/wsl_share# vim ~/.bashrc //配置环境变量
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// bashrc中追加以下内容
export JAVA_HOME=/app/jdk1.8.0_221
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH
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root@DESKTOP-UFOJIL7:/wsl_share# source ~/.bashrc    //重新加载环境变量

root@DESKTOP-UFOJIL7:/wsl_share# java -version
java version "1.8.0_221"
Java(TM) SE Runtime Environment (build 1.8.0_221-b11)
Java HotSpot(TM) 64-Bit Server VM (build 25.221-b11, mixed mode)


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