SpringBoot/FamilyCashCard
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Update GET

djmil 2023-07-19 14:33:22 +02:00
parent fb97794e5c
commit 1cd57754eb
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GET.md

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`src/main/java/djmil/cashcard/CashCardController.java` `src/main/java/djmil/cashcard/CashCardController.java`
```java ```java
package example.cashcard; package example.cashcard;
import org.springframework.http.ResponseEntity; import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController; import org.springframework.web.bind.annotation.RestController;
@RestController @RestController
public class CashCardController { public class CashCardController {
@GetMapping("/cashcards/{requestedId}") @GetMapping("/cashcards/{requestedId}")
public ResponseEntity<CashCard> findById(@PathVariable Long requestedId) { public ResponseEntity<CashCard> findById(@PathVariable Long requestedId) {
if (requestedId.equals(99L)) { if (requestedId.equals(99L)) {
CashCard cashCard = new CashCard(99L, 123.45); CashCard cashCard = new CashCard(99L, 123.45);
return ResponseEntity.ok(cashCard); return ResponseEntity.ok(cashCard);
} else { } else {
return ResponseEntity.notFound().build(); return ResponseEntity.notFound().build();
} }
} }
} }
``` ```
# @GetMapping # @GetMapping
Needs the URI Path and tells Spring to route `GET` requests strictly to the `findById` method. Needs the URI Path and tells Spring to route `GET` requests strictly to the `findById` method.
## Alternative variant for providing URI mapping for `@RestConttroller` ## Alternative variant for providing URI mapping for `@RestConttroller`
```java ```java
@RestController @RestController
@RequestMapping("/cashcards") @RequestMapping("/cashcards")
public class CashCardController { public class CashCardController {
@GetMapping("/{requestedId}") @GetMapping("/{requestedId}")
public ResponseEntity<String> findById() { public ResponseEntity<String> findById() {
``` ```
# @PathVariable # @PathVariable
Spring needs to know how to get the value of the `requestedId` parameter. This is done using the `@PathVariable` annotation. The fact that the parameter name matches the `{requestedId}` text *(URI Path)* within the `@GetMapping` parameter allows Spring to assign (inject) the correct value to the `requestedId` variable. Spring needs to know how to get the value of the `requestedId` parameter. This is done using the `@PathVariable` annotation. The fact that the parameter name matches the `{requestedId}` text *(URI Path)* within the `@GetMapping` parameter allows Spring to assign (inject) the correct value to the `requestedId` variable.
# ResponseEntity # ResponseEntity
REST says that the Response needs to contain a Cash Card in its body, and a Response code of 200 (OK). Spring Web provides the `ResponseEntity` class for this purpose. It also provides several utility methods to produce Response Entities. Here `ResponseEntity` used to create a Response with code **200 (OK)**, and a body containing a `CashCard`. REST says that the Response needs to contain a Cash Card in its body, and a Response code of 200 (OK). Spring Web provides the `ResponseEntity` class for this purpose. It also provides several utility methods to produce Response Entities. Here `ResponseEntity` used to create a Response with code **200 (OK)**, and a body containing a `CashCard`.
# Testing # Testing
Testing `GET` and other REST request is considerate to be [[IntegrationTests]]. Testing `GET` and other REST request is considerate to be [[IntegrationTests]].
Also, after running the application, you can use browser (or any other web-testing tool) by visiting http://localhost:8080/cashcards/99