如何使用此响应主体解析对POJO的响应

Question

New to spring and everything. Trying to hit an endpoint and retrieve the information in the response field. However I don't know how to access information more specific than just bringing back the whole response since it isn't nested in key/values?

I'm using rest template + MappingJacksonHttpMessageConverter . I would like to map the information within response to a pojo, just unsure how to go any further or if I'm even in the right direction here. Example code below.

Postman response:

{
    "success": true,
    "message": "Success",
    "body": {
        "response": "TopStatus=Completed,TopRanking=4 - reqs met, TopDate=2014-04-23,TopTime=11:00 AM,TopEndTime=1:30 AM"
    },
    "status": 200
}

Method that is trying to map to Pojo

public TopStatus getTopAppStatus(int topId, Status status) {
    HttpHeaders headers = new HttpHeaders();
    headers.setContentType(MediaType.APPLICATION_JSON);
    HashMap<String, String> statusObj = new HashMap<String, String>();
    statusObj.put("topStatus", "Fail");
    statusObj.put("topId", "93");

    RestTemplate rt = getRestTemplate();
    URI uri = new URI("urihere");
    HttpEntity<HashMap> entity = new HttpEntity<HashMap>(statusObj, headers);
    TopStatus response = rt.postForObject(uri, entity, TopStatus.class);

    return response;
}

Pojo example on how I have it set up

@JsonIgnoreProperties(ignoreUnknown = true)
public class TopStatus{

    @JsonProperty("TopStatus")
    private String topStatus;

    rest of fields, setters, getters etc...

}

Answer 1

You can use postForEntity() method returns ResponseEntity type object instead of postForObject()

you need to do small change that will map the response body to the POJO

ResponseEntity<TopStatus> response = rt.postForEntity(uri, entity, TopStatus.class);
TopStatus topStatusResponse = response.getBody();
return topStatusResponse;

This should return only the expected POJO.

Answer 2

Try to use below code.

public TopStatus getTopAppStatus(int topId, Status status) {
    HttpHeaders headers = new HttpHeaders();
    headers.setContentType(MediaType.APPLICATION_JSON);
    TopStatus model = new TopStatus();
    model.setTopStatus("Fail");
    model.setTopId("93");

    RestTemplate rt = getRestTemplate();
    URI uri = new URI("urihere");
    HttpEntity<> entity = new HttpEntity<HashMap>(model, headers);
    TopStatus response = rt.postForObject(uri, entity, TopStatus.class);

    return response;
}

Modified Code.

public TopStatus getTopAppStatus(int topId, Status status) {

    RestTemplate restTemplate = new RestTemplate();
    // Add the Jackson message converter
    restTemplate.getMessageConverters().add(new MappingJackson2HttpMessageConverter());
    // create request body
    //Here your TopStatus object converted to json. you can use Jackson to do this. 
    String input = "{\"topStatus\":\"Fail\",\"topId\":\"93\"}";


    // set headers
    HttpHeaders headers = new HttpHeaders();
    headers.setContentType(MediaType.APPLICATION_JSON);
    HttpEntity<String> entity = new HttpEntity<String>(input, headers);

    URI uri = new URI("urihere");
    ResponseEntity<TopStatus> response = restTemplate
        .exchange(uri, HttpMethod.POST, entity, TopStatus.class);

    return response;
}