如何从FeignClient端点返回LocalDateTime？

@FeignClient(name = "example-service")
public interface ExampleServiceClient {

    @GetMapping("/api/getDateTime")
    LocalDateTime getDateTime();
}

@RestController
@RequestMapping("/api")
public class ExampleController {

    @GetMapping("/getDateTime")
    public String getDateTime() {
        LocalDateTime dateTime = LocalDateTime.now();
        return dateTime.toString();
    }
}

@Configuration
public class FeignConfig {

    @Bean
    public Decoder feignDecoder() {
        return new ResponseEntityDecoder(new LocalDateTimeDecoder());
    }
}

public class LocalDateTimeDecoder implements Decoder {

    @Override
    public Object decode(Response response, Type type) throws IOException, DecodeException, FeignException {
        if (response.body() == null) {
            return null;
        }
        try (Reader reader = response.body().asReader()) {
            String dateTimeString = CharStreams.toString(reader);
            return LocalDateTime.parse(dateTimeString);
        }
    }
}