A PATTERN will match only complete file names: the portion of the full path matching the pattern must occur at the end of the file name and be preceded by a slash. A REGEX will match any portion of the full path but it may use '/' and '$' to simulate the PATTERN behavior. 官网上有这一段，但并没有看懂
PATTERN应该说的是通配符，比如*.abc
REGEX是正则表达式
通配符就是只有星号问号，而正则复杂多了。