如何将一个jar包配置到java的环境变量/CLASSPATH？（不是一个工程的CLASSPATH）

Question

就是比如abc.jar中有一个def类，我想在命令行的任何目录下通过“java abc.def” 命令就能直接运行def这个类，该怎么做呢？
抱歉，补充一下：操作系统是macOS

Answer 1

首先感谢各位大大热心回答，启发了我如何搜索。下面是在stackoverflow中搜到的答案，顺利解决了我的问题。
If you want to make a certain set of JAR files (or .class files) available to every Java application on the machine, then your best bet is to add those files to /Library/Java/Extensions.

Or, if you want to do it for every Java application, but only when your Mac OS X account runs them, then use ~/Library/Java/Extensions instead.

Answer 2

CLASSPATH=.;%JAVA_HOME%lib;%JAVA_HOME%libtools.jar
设置CLASSPATH环境变量

Answer 3

%JAVA_HOME%lib/xxx.jar

Answer 4

CLASSPATH=$CLASSPATH:abc.jar所在目录; java ...