我有一个json:
{
"clientId": "1",
"appName": "My Application",
"body": "Message body",
"title": "Title"
"data": {
"key1": "value1",
"key2": "value2"
}
}
还有一个DTO:
@Data
public class PushNotificationDto {
private Long clientId;
private String appName;
private String body;
private String title;
private String data;
}
我正在使用SpringBoot,而我的@RestController看起来像这样:
@RestController
@AllArgsConstructor
public class PushNotificationController {
private PushNotificationService pushNotificationService;
@PostMapping("/push-notification")
void sendPushNotification(@RequestBody PushNotificationDto pushNotification) {
pushNotificationService.send(pushNotification);
}
}
由于json对象中的数据字段实际上是一个对象,但是在我的DTO中它是一个字符串,所以出现异常:
org.springframework.http.converter.HttpMessageNotReadableException: JSON parse error:
Can not deserialize instance of java.lang.String out of START_OBJECT token;
nested exception is com.fasterxml.jackson.databind.JsonMappingException:
Can not deserialize instance of java.lang.String out of START_OBJECT token
我该怎么做才能使反序列化成功执行?
答案 0 :(得分:2)
在您的请求对象中,您有一个data
数组。
"data": {
"key1": "value1",
"key2": "value2"
}
但是在您的PushNotificationDto
对象中,您有String data
。这就是您收到此错误的原因。要解决此错误,您可以将String data
更改为Map<String,String>