[SOLVED] Json Parsing and assign to DTO

Json Parsing and assign to DTO

Issue while parsing JSON into DTO.

JSON response is :

{
  "content": [
    {
      "id": 350,
      "reg": "FA-2001",
      "Email": "abc@gmail.in",
      "Mobile": "+9192000000",
      "Name": "dr kumar",
      "Ip": "0:0:0:0:0:0:0:1",
      "Datetime": "2022-10-20T13:50:49",
    }
  ],
  "pageable": {
    "sort": {
      "unsorted": false,
      "sorted": true,
      "empty": false
    },
    "pageNumber": 0,
    "pageSize": 20,
    "offset": 0,
    "paged": true,
    "unpaged": false
  },
  "last": true,
  "totalPages": 1,
  "totalElements": 1,
  "first": true,
  "sort": {
    "unsorted": false,
    "sorted": true,
    "empty": false
  },
  "numberOfElements": 1,
  "size": 20,
  "number": 0,
  "empty": false
}

DTO

@Data
public class OtherResponse {
    @JsonProperty(value = "content")
    private Map content;
}

Getting

com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot deserialize value of type java.util.LinkedHashMap<java.lang.Object,java.lang.Object> from Array value (token JsonToken.START_ARRAY)

Please suggest how to get value in Map or some other object My main focus is to send specific key value pair in response.

Solution

In your json String, the content is a List. what you can do is to update the OtherResponse accordingly:

@Data
public class OtherResponse {
    @JsonProperty(value = "content")
    private List<Map<String, String>> content;

    private Pageable pageable;
}

Or even define a dedicated class for it:

@Data
public class OtherResponse {
    @JsonProperty(value = "content")
    private List<Person> content;

    private Pageable pageable;
}

PS: updated answer and added the Pageable field. I am using here the Pageable interface imported from org.springframework.data.domain.Pageable