这个问题几乎和this一样，但它的不同之处在于我试图将String转换为LocalDate。这是STS的错误：
2018-12-14 00:47:04.507 WARN 6216 --- [nio-8080-exec-2] .wsmsDefaultHandlerExceptionResolver：已解决[org.springframework.http.converter.HttpMessageNotReadableException：JSON解析错误：无法构造java的实例.time.LocalDate：否从String值反序列化的String-argument构造函数/工厂方法（'2018-12-14'）;嵌套异常是com.fasterxml.jackson.databind.JsonMappingException：无法构造java.time.LocalDate的实例：no String-argument构造函数/工厂方法从[String]（'2018-12-14'）反序列化[来源： java.io.PushbackInputStream@73ff9989; line：3，column：16]（通过参考链：com.xxxxx.xxxxxx.model.request.ReservationRequest [“checkin”]）]
这是来自邮递员：
{“timestamp”：1544744824516，“status”：400，“error”：“Bad Request”，“exception”：“org.springframework.http.converter.HttpMessageNotReadableException”，“message”：“JSON解析错误：无法构造java.time.LocalDate的实例：no String-argument构造函数/工厂方法从String值反序列化（'2018-12-14'）;嵌套异常是com.fasterxml.jackson.databind.JsonMappingException：无法构造java的实例.time.LocalDate：无字符串参数构造函数/工厂方法从字符串值（'2018-12-14'）\ n反序列化[来源：java.io.PushbackInputStream@73ff9989;行：3，列：16]（通过参考链：com.xxxxx.xxxxx.model.request.ReservationRequest [\“checkin \”]）“，”path“：”/ room / reservation / v1“}
POST请求是：
{
"id": 12345,
"checkin": "2018-12-14",
"checkout": "2018-12-17"
}
相关课程如下：
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.ObjectWriter;
import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
@Configuration
public class ApiConfig {
@Bean
public ObjectMapper objectMapper() {
ObjectMapper objectMapper = new ObjectMapper();
objectMapper.registerModule(new JavaTimeModule());
return new ObjectMapper();
}
@Bean
public ObjectWriter objectWriter(ObjectMapper objectMapper) {
return objectMapper.writerWithDefaultPrettyPrinter();
}
}
和
import java.time.LocalDate;
import org.springframework.format.annotation.DateTimeFormat;
public class ReservationRequest {
private Long id;
@DateTimeFormat(iso = DateTimeFormat.ISO.DATE)
private LocalDate checkin;
@DateTimeFormat(iso = DateTimeFormat.ISO.DATE)
private LocalDate checkout;
public ReservationRequest() {
super();
}
public ReservationRequest(Long id, LocalDate checkin, LocalDate checkout) {
super();
this.id = id;
this.checkin = checkin;
this.checkout = checkout;
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public LocalDate getCheckin() {
return checkin;
}
public void setCheckin(LocalDate checkin) {
this.checkin = checkin;
}
public LocalDate getCheckout() {
return checkout;
}
public void setCheckout(LocalDate checkout) {
this.checkout = checkout;
}
}
和
import org.springframework.format.annotation.DateTimeFormat;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import com.xxxxx.xxxxxx.model.request.ReservationRequest;
import com.xxxxx.xxxxxx.model.response.ReservationResponse;
@RestController
@RequestMapping(ResourceConstants.ROOM_RESERVATION_V1)
public class ReservationResource {
@RequestMapping(path = "", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_UTF8_VALUE)
public ResponseEntity<ReservationResponse> getAvaiableRooms(
@RequestParam(value = "checkin") @DateTimeFormat(iso = DateTimeFormat.ISO.DATE) LocalDate checkin,
@RequestParam(value = "checkout") @DateTimeFormat(iso = DateTimeFormat.ISO.DATE) LocalDate checkout) {
return new ResponseEntity<>(new ReservationResponse(), HttpStatus.OK);
}
@RequestMapping(path = "", method = RequestMethod.POST, produces = MediaType.APPLICATION_JSON_UTF8_VALUE, consumes = MediaType.APPLICATION_JSON_UTF8_VALUE)
public ResponseEntity<ReservationResponse> createReservation(@RequestBody ReservationRequest reservationRequest) {
return new ResponseEntity<>(new ReservationResponse(), HttpStatus.CREATED);
}
@RequestMapping(path = "", method = RequestMethod.PUT, produces = MediaType.APPLICATION_JSON_UTF8_VALUE, consumes = MediaType.APPLICATION_JSON_UTF8_VALUE)
public ResponseEntity<ReservationResponse> updateReservation(@RequestBody ReservationRequest reservationRequest) {
return new ResponseEntity<>(new ReservationResponse(), HttpStatus.OK);
}
@RequestMapping(path = "/{reservationId}", method = RequestMethod.DELETE)
public ResponseEntity<Void> deleteReservation(@PathVariable long reservationId) {
return new ResponseEntity<>(HttpStatus.NO_CONTENT);
}
}
我已经包含了进口以防万一。
无论如何，如果我将ReservationRequest更改为具有字符串而不是像这样的LocalDate字段，那么它不会产生错误
public class ReservationRequest {
private Long id;
@DateTimeFormat(iso = DateTimeFormat.ISO.DATE)
private String checkin;
@DateTimeFormat(iso = DateTimeFormat.ISO.DATE)
private String checkout;
public ReservationRequest() {
super();
}
public ReservationRequest(Long id, String checkin, String checkout) {
super();
this.id = id;
this.checkin = checkin;
this.checkout = checkout;
}
(getters and setters updated as well)
JDK 1.8; springBootVersion ='1.5.17.RELEASE';名称：'jackson-datatype-jsr310'，版本：'2.9.7'
问题是为什么它不能像LocalDate一样工作？
更新：尝试了these解决方案，并添加了@JsonSerialize和@JsonDeserialize，既不是objectMapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);也不是objectMapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);
工作如此现在它看起来像：
public class ReservationRequest {
private Long id;
@JsonSerialize(using = ToStringSerializer.class)
@JsonDeserialize(using = LocalDateDeserializer.class)
//@JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd")
@DateTimeFormat(iso = DateTimeFormat.ISO.DATE)
private LocalDate checkin;
@JsonSerialize(using = ToStringSerializer.class)
@JsonDeserialize(using = LocalDateDeserializer.class)
//@JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd")
@DateTimeFormat(iso = DateTimeFormat.ISO.DATE)
private LocalDate checkout;
public ReservationRequest() {
super();
}
那么，现在看起来它有效，但我不知道它是否是一个好的解决方案？
我最近遇到了同样的问题，错误的原因是我的json字符串周围有双引号，当我删除它时工作完全正常
我认为，对于我在面对相同问题的帖子上回复已经太晚了，下面的注释很有帮助。
@JsonFormat(pattern = "yyyy-MM-dd")
private LocalDate dateOfBirth;
:)