Java security之记不住的CodeBase

The exact meaning of a CodeBase URL value depends on the characters at the end. 
A CodeBase with a trailing "/" matches all class files (not JAR files) in the specified directory.
A CodeBase with a trailing "/*" matches all files (both class and JAR files) contained in that directory. 
A CodeBase with a trailing "/-" matches all files (both class and JAR files) in the directory and recursively all files in subdirectories contained in that directory.