Java Spring @RequestMapping批注

Question

Why am I able to use this annotation - give it a value without specifying which element I'm assigning this value to? For example, I can write: @RequestMapping("/home") instead of @RequestMapping(value="/home") .

The specs do not mention anything about it. Is it just a behaviour of Java annotations treating the field value as default one?

Answer 1

Case #1: If you have a single value then it's optional to write like this:

@RequestMapping(value="/home")

In this case you may write @RequestMapping("/home") also. While providing a single string this is automatically assigned to "value". [ default behavior ]

Case #2: @RequestMapping has a String[] value parameter, so you should be able to specify multiple values like this:

@RequestMapping(value={"","/", "/away", "/home"})