Request mapping by method and path in Spring Boot - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of @RequestMapping in Spring Boot?

It is used to map HTTP requests to handler methods in controller classes, specifying the URL path and HTTP method.

beginner

How do you specify that a method should handle only GET requests for path '/hello'?

Use @RequestMapping(value = "/hello", method = RequestMethod.GET) above the method.

intermediate

What annotation shortcut can be used instead of @RequestMapping(method = RequestMethod.POST)?

You can use @PostMapping to map POST requests more simply.

intermediate

Can @RequestMapping map multiple HTTP methods to the same method? How?

Yes, by setting method attribute to an array, e.g., method = {RequestMethod.GET, RequestMethod.POST}.

beginner

What happens if you omit the method attribute in @RequestMapping?

The method will handle requests of all HTTP methods for the specified path.

Which annotation maps a method to handle HTTP GET requests for path '/users'?

A @GetMapping("/users")

B @PostMapping("/users")

C @RequestMapping(value = "/users", method = RequestMethod.POST)

D @DeleteMapping("/users")

The @GetMapping annotation is a shortcut for @RequestMapping with method GET.

How do you map a method to handle both GET and POST requests on path '/data'?

A @RequestMapping(value = "/data")

B @GetMapping(value = "/data")

C @PostMapping(value = "/data")

D @RequestMapping(value = "/data", method = {RequestMethod.GET, RequestMethod.POST})

Setting method to an array of RequestMethod enums allows multiple HTTP methods.

What is the default HTTP method if you use @RequestMapping("/path") without method attribute?

A GET only

B All HTTP methods

C No methods, causes error

D POST only

Without specifying method, the mapping applies to all HTTP methods.

Which annotation is NOT a shortcut for a specific HTTP method in Spring Boot?

A @RequestMapping

B @PatchMapping

C @PutMapping

D @DeleteMapping

@RequestMapping is general and requires method attribute to specify HTTP method.

How do you map a method to handle DELETE requests on path '/item/{id}'?

A @RequestMapping(value = "/item/{id}", method = RequestMethod.GET)

B @PostMapping("/item/{id}")

C @DeleteMapping("/item/{id}")

D @GetMapping("/item/{id}")

@DeleteMapping is the shortcut for DELETE HTTP method mapping.

Explain how to map a Spring Boot controller method to handle POST requests at path '/submit'.

Think about the annotation and method attribute for POST.

Describe what happens if you use @RequestMapping("/test") without specifying the HTTP method.

Consider default behavior of @RequestMapping.