https://cloudcold.ai/tags/mac/Recent content in Mac on Lost TempleHugoenSun, 31 Jul 2022 11:24:38 +0800https://cloudcold.ai/posts/2022-07-31-%E5%AF%BB%E6%89%BEmac-java_home/Sun, 31 Jul 2022 11:24:38 +0800https://cloudcold.ai/posts/2022-07-31-%E5%AF%BB%E6%89%BEmac-java_home/<h2 id="前期准备"><strong>前期准备</strong></h2> <ol> <li>下载JDK安装包：在<a href="https://link.zhihu.com/?target=http%3A//www.oracle.com/technetwork/cn/java/javase/downloads/jdk8-downloads-2133151-zhs.html">JDK1.8下载</a>中选择Mac的JDK安装包</li> <li>安装JDK：这里只要按照安装指引一步一步安装即可</li> </ol> <h2 id="查找java_"><strong>查找JAVA_HOME</strong></h2> <ol> <li>打开Mac的终端，检查JDK是否安装成功：<code>java -version</code></li> <li>查看java指令所在的目录：<code>which java</code>。输出结果：<code>/usr/bin/java</code></li> <li>显示java指令文件的属性：<code>ls -l /usr/bin/java</code>。输出结果如下：<code>lrwxr-xr-x 1 root wheel 74 12 2 06:44 /usr/bin/java -&gt; /System/Library/Frameworks/JavaVM.framework/Versions/Current/Commands/java</code>，从输出结果可以知道**/usr/bin/java<strong>文件是一个链接文件，实际是指向</strong>/System/Library/Frameworks/JavaVM.framework/Versions/Current/Commands/java**文件的。</li> <li>进入实际指令所在的文件夹：<code>cd /System/Library/Frameworks/JavaVM.framework/Versions/Current/Commands</code>。但是这个目录并不是JAVA_HOME目录。</li> <li>然后就是最重点的地方，在这个目录下面有一个mac的JDK特有的<code>java_home</code>指令可以查看JDK的JAVA_HOME目录。执行指令：<code>./java_home</code>执行结果如下：<code>/Library/Java/JavaVirtualMachines/jdk1.8.0_162.jdk/Contents/Home</code></li> </ol> <h2 id="设置java_"><strong>设置JAVA_HOME</strong></h2> <ol> <li>编辑.bash_profile文件：<code>vim ~/.bash_profile</code></li> <li>添加以下内容：<code>export JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.8.0_162.jdk/Contents/Homeexport PATH=$JAVA_HOME/bin:$PATH</code></li> <li>使修改的文件生效：<code>source ~/.bash_profile</code></li> </ol>