Week 7 Spring Web Annotations

Question 1

What is the @Controller Annotation?

Answer 1

@Controller: specifies a class as a controller, which is a special bean used to handle web application requests

Question 2

What is the @ResponseBody annotation?

Answer 2

@ResponseBody: converts a Java object that we are returning from a controller method into JSON

Question 3

What is the @PathVariable annotation?

Answer 3

@PathVariable: Used to bind “path parameters” ex: /users/{id} where id is the path parameter, to a variable in the method parameters

Question 4

What is the @RequestParam annotation?

Answer 4

@RequestParam: used to bind “query parameters” ex: ?amountLessThan=2000 to a variable in the method parameters (or form-data)

Question 5

What is the @RequestBody annotation?

Answer 5

@RequestBody: allows Spring to map JSON from the body of a request into a Java Object

Question 6

What is the @RestController annotation?

Answer 6

@RestController: the same as @Controller, but automatically adds @ResponseBody to each return type in the controller methods

Question 7

What are the Request Mappings?

Answer 7

@RequestMapping
@GetMapping
@PostMapping
@PutMapping
@DeleteMapping
@PatchMapping