Read: 12 - Spring RESTful Routing & Static Files

###Spring RequestMapping

@RequestMapping Basics

@RequestMapping — by Path

• define the Request URI to access the REST Endpoints
• @RequestMapping(value = “/ex/foos”, method = RequestMethod.GET)

@RequestMapping — the HTTP Method

• The HTTP method parameter has no default
• @RequestMapping(v = “/ex/foos”, method = POST) @ResponseBody

RequestMapping and HTTP Headers

1. @RequestMapping With the headers Attribute

• The mapping can be narrowed even further by specifying a header for the request:

@RequestMapping(value = "/ex/foos", headers = "key=val", method = GET)
  @ResponseBody

1. @RequestMapping Consumes and Produce

@RequestMapping(
  value = "/ex/foos",
  method = GET,
  headers = "Accept=application/json")
  @ResponseBody

RequestMapping With Path Variables

• Parts of the mapping URI can be bound to variables via the @PathVariable annotation.
  1. Single @PathVariable
  2. Multiple @PathVariable
  3. ` @PathVariable With Regex`

RequestMapping With Request Parameters

• allows easy mapping of URL parameters with the @RequestParam annotation.

RequestMapping Corner Cases

1. @RequestMapping — Multiple Paths Mapped to the Same Controller Method :is usually used for a single controller method

2. @RequestMapping — Multiple HTTP Request Methods to the Same Controller Method

• Multiple requests using different HTTP verbs can be mapped to the same controller method.

1. @RequestMapping — a Fallback for All Requests

• to implement a simple fallback for all requests using a particular HTTP method

1. Ambiguous Mapping Error

• The ambiguous mapping error occurs when Spring evaluates two or more request mappings to be the same for different controller methods. A request mapping is the same when it has the same HTTP method, URL, parameters, headers, and media type.

New Request Mapping Shortcuts

@GetMapping @PostMapping @PutMapping @DeleteMapping @PatchMapping