我有簡單的帶有Controller,和類的 Spring Boot 應用程序Service，所以我試圖模擬bean 中的方法，它接受四個參數但它返回BusinessUtilMockUtilnull模擬主控制器@RestControllerpublic class MockMainController {@Autowiredprivate MockBusiness mockBusiness;@GetMapping("request")public MockOutput mockRequest() {    return mockBusiness.businessLogic(new MockInput());    } }模擬業務@Servicepublic class MockBusiness {@Autowiredprivate MockService mockService;public MockOutput businessLogic(MockInput input) {    return mockService.serviceLogic(input);    } }模擬服務@Servicepublic class MockService {@Autowiredprivate MockUtil mockUtil;public MockOutput serviceLogic(MockInput input) {    ResponseEntity<MockOutput> res = mockUtil.exchange(UriComponentsBuilder.fromUriString(" "), HttpMethod.GET,            HttpEntity.EMPTY, new ParameterizedTypeReference<MockOutput>() {            });    return res.getBody();    } }模擬工具@Componentpublic class MockUtil {@Autowiredprivate RestTemplate restTemplate;public <T> ResponseEntity<T> exchange(UriComponentsBuilder uri, HttpMethod method, HttpEntity<?> entity,        ParameterizedTypeReference<T> typeReference) {    try {        ResponseEntity<T> response = restTemplate.exchange(uri.toUriString(), method, entity, typeReference);        return response;    } catch (HttpStatusCodeException ex) {        System.out.println(ex);        return new ResponseEntity<T>(ex.getStatusCode());    } catch (Exception ex) {        ex.printStackTrace();        return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).build();         }     } }下面是我的簡單測試類，當mockUtil.exchange調用任何方法時，我想基于返回對象ParameterizedTypeReference<T>模擬控制器測試@SpringBootTest@ActiveProfiles("test")@Profile("test")@RunWith(SpringRunner.class)public class MockControllerTest {@Autowiredprivate MockMainController mockMainController;@MockBeanprivate MockUtil mockUtil;