* Rules: judge to whom the definition of the path is used? Request sent from the future to determine where
* to the client browser to use: need to add virtual directory (access path of the project)
* <a> such as the href, <form> the action, <img> in src, the path redirect etc ...
* server to use: no need to add virtual directories
* in such forward path
Why should such a requirement?
The end customer can be thought of as a take-away little brother, 1 class and 2 classes have a student named Joe Smith, so the food delivery time must be added to the class name.
But a class internal (server) can be directly called Zhang Third, rather than add class name.
