Add multiple classpath packages

To:

Add the lower-level and lower-level directories under all subdirectories and sub-directories under a directory to the classpath. If you need to write two more statements, share them and forget them.
In Linux, you can add all jar files in the/opt/.../lib directory to classpath through this method.
Classpath = $ classpath: 'Find/opt/.../lib-name *. Jar | tr' \ N '':''
The following method is used to add the directory under/opt/.../lib and the subdirectories and lower-level directories under the directory to classpath:
Classpath = $ classpath: 'Find/opt/.../lib-type D | tr' \ N '':''