Spring RestTemplate mit paginierter API
Unsere REST-APIs geben Ergebnisse in Pages zurück. Hier ist ein Beispiel für einen Controller
@RequestMapping(value = "/search", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE + ";charset=UTF-8")
@ResponseStatus(HttpStatus.OK)
public Page<MyObject> findAll(Pageable pageable) {
...
}
Gibt es eine einfache Möglichkeit, diese API mit RestTemplate zu nutzen?
wenn wir es tu
ParameterizedTypeReference<Page<MyObject>> responseType = new ParameterizedTypeReference<Page<MyObject>>() { };
ResponseEntity<Page<MyObject>> result = restTemplate.exchange(url, HttpMethod.GET, null/*httpEntity*/, responseType);
List<MyObject> searchResult = result.getBody().getContent();
it löst eine Ausnahme aus
org.springframework.http.converter.HttpMessageNotReadableException: Could not read document: Can not construct instance of org.springframework.data.domain.Page,
problem: abstract types either need to be mapped to concrete types, have custom deserializer, or be instantiated with additional type information at [Source: java.io.PushbackInputStream@3be1e1f2; line: 1, column: 1]; nested exception is com.fasterxml.jackson.databind.JsonMappingException: Can not construct instance of org.springframework.data.domain.Page, problem: abstract types either need to be mapped to concrete types, have custom deserializer, or be instantiated with additional type information
Danke im Vorau