Spring WebTestClient JSON LocalDate 解碼

Question

在 Spring Boot 2.0.1 中使用WebTestClient時，我得到不同的格式化日期，具體取決於我綁定測試客戶端的方式，請參見下面的代碼。

那么如何讓WebTestClient.bindToController返回LocalDate格式為2018-04-13 ？ 當我調用WebTestClient.bindToServer()時，我得到了預期的格式。

@RestController
public class TodayController {
  @GetMapping("/today")
  public Map<String, Object> fetchToday() {
    return ImmutableMap.of("today", LocalDate.now());
  }
}

測試：

@ExtendWith({SpringExtension.class})
@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
class TodayControllerTest {

  @LocalServerPort
  private int randomPort;

  @Autowired
  private TodayController controller;

  @Test
  void fetchTodayWebTestClientBoundToController() {
     WebTestClient webTestClient = WebTestClient.bindToController(controller)
        .configureClient()
        .build();
    webTestClient.get().uri("/today")
        .exchange()
        .expectBody()
        .json("{\"today\":[2018,4,13]}");
}

@Test
void fetchTodayWebTestClientBoundToServer() {
    WebTestClient webTestClient = WebTestClient.bindToServer()
        .baseUrl("http://localhost:" + randomPort)
        .build();

    webTestClient.get().uri("/today")
        .exchange()
        .expectBody()
        .json("{\"today\":\"2018-04-13\"}");
}

Answer 1

事實證明，在使用WebTestClient.bindToController時，我需要設置Jackson解碼器/編碼器。 例如

@Test
  public void fetchTodayWebTestClientBoundToController() {
     WebTestClient webTestClient = WebTestClient.bindToController(controller)
         .httpMessageCodecs((configurer) -> {
             CodecConfigurer.DefaultCodecs defaults = configurer.defaultCodecs();
             defaults.jackson2JsonDecoder(new Jackson2JsonDecoder(objectMapper, new MimeType[0]));
             defaults.jackson2JsonEncoder(new Jackson2JsonEncoder(objectMapper, new MimeType[0]));
         })
        .configureClient()
        .build();
    webTestClient.get().uri("/today")
        .exchange()
        .expectBody()
        .json("{\"today\":\"2018-04-30\"}");
  }

Spring Boot項目的更多詳細答案

Answer 2

使用配置添加此文件

import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.boot.autoconfigure.AutoConfigureAfter;
import org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;
import org.springframework.http.codec.ServerCodecConfigurer;
import org.springframework.http.codec.json.Jackson2JsonDecoder;
import org.springframework.http.codec.json.Jackson2JsonEncoder;
import org.springframework.web.reactive.config.WebFluxConfigurer;

@Configuration
@Import(JacksonAutoConfiguration.class)
@AutoConfigureAfter(JacksonAutoConfiguration.class)
public class JacksonTestConfiguration {
   
    @Bean
    WebFluxConfigurer webFluxConfigurer(ObjectMapper objectMapper) {
        return new WebFluxConfigurer() {
            @Override
            public void configureHttpMessageCodecs(ServerCodecConfigurer configurer) {
                configurer.defaultCodecs().jackson2JsonEncoder(new Jackson2JsonEncoder(objectMapper));
                configurer.defaultCodecs().jackson2JsonDecoder(new Jackson2JsonDecoder(objectMapper));
            }
        };
    }
}