The Java Servlet-urlPartten

Servlet 的 urlpartten

　　urlpartten: Servlet access path

　　1, a Servlet can define a plurality of access paths, in use @WebServlet annotation can be found inside the urlpartten is an array,

String[] urlPatterns() default {};

　　　　This means that you can define multiple paths Servlet:

　　　 Demo：

@WebServlet({"/a1","/aa1","/aaa1"})

　　 2, the path definition rule:

　　　　(1) / xxx: path matching, single path

　　　　(2) / xxx / xxx: multilayer path, directory structure

　　　　(3) * do:. Extension to match

　  Note : Here's an asterisk (*) as a wildcard, that can match everything, but very low priority, not only other match, the match will be an asterisk.