json - [spring-boot,restTemplate]JSON解析错误: Cannot deserialize value of type XXXX from Object value (token `JsonToken.START_OBJECT` )

Question

我使用 Spring-boot 和 RestTemplate。我在从 json 转换为 Dto 时遇到问题。

客户端

Items items = restTemplate.getForObject("https://xxxxx/xxxxx, Items.class);

元素

@Getter
@Setter
@AllArgsConstructor
@JsonIgnoreProperties(ignoreUnknown = false)
public class Items {

    private List<Item> Items;

    public Items() {
        Items = new ArrayList<>();
    }

    @Override
    public String toString() {
        return String.valueOf(Items.size());
    }
}

元素

@Getter
@Setter
@AllArgsConstructor
@NoArgsConstructor
@JsonIgnoreProperties(ignoreUnknown = true)
public class Item {

    private String title;

    @Override
    public String toString() {
        return "Item{" + "title=" + title + '}';
    }

}

Json来了(格式化)

{
  "Items": [
    {
      "Item": {
        "limitedFlag": 0,
        "authorKana": "XXX",
        "author": "XXX",
        "subTitle": "XXX",
        "seriesNameKana": "XXXX",
        "title": "XXXX",
        "subTitleKana": "XXXX"
      }
    },
    {
      "Item": {
        "limitedFlag": 0,
        "authorKana": "XXX",
        "author": "XXX",
        "subTitle": "XXX",
        "seriesNameKana": "XXXX",
        "title": "XXXX",
        "subTitleKana": "XXXX"
      }
    }
  ],
  "last": 30
}

---

我收到此错误消息:

Caused by: org.springframework.http.converter.HttpMessageNotReadableException: JSON parse error: Cannot deserialize value of type `[Ldev.itboot.mb.rest.Item;` from Object value (token `JsonToken.START_OBJECT`); nested exception is com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot deserialize value of type `[Ldev.itboot.mb.rest.Item;` from Object value (token `JsonToken.START_OBJECT`)

我看了这里和谷歌，但仍然无法弄清楚。

任何回应都会有所帮助。

问候。

Answer 1

您的 JSON 结尾似乎不正确，数组之后“last”之前应该有一个逗号。

  ]
  "last": 30
}