使用RestTemplate和Jackson反序列化对Java的JSON响应

Question

I'm running into some headaches with deserializing JSON into Java objects in a Spring Boot 1.5 app with Jackson.

As you can see below, the JSON response is an array consisting of a single JSON object with some nested attributes:

[
  {
    "deploymentProject": {
        "id": 57966596,
        "name": "MyApp 6.3"
    },
    "environmentStatuses": [{
            "environment": {
                "id": 57245736,
                "name": "Dev1",
                "deploymentProjectId": 57966596
            },
            "deploymentResult": {
                "deploymentVersionName": "App-51",
                "id": 59769040
            }
        },
        {
            "environment": {
                "id": 57245737,
                "name": "Dev2",
                "deploymentProjectId": 57966596
            },
            "deploymentResult": {
                "deploymentVersionName": "App-51",
                "id": 59769041
            }
        }
    ]
  }
]

ResultData.java

I don't care about the deploymentProject attribute so I'm only including the environmentStatuses in ResultData .

@JsonIgnoreProperties(ignoreUnknown = true)
public class ResultData {   
  private EnvironmentStatus[] environmentStatuses;

  // Getters and setters omitted
}

EnvironmentStatus.java

@JsonIgnoreProperties(ignoreUnknown = true)
public class EnvironmentStatus {

    private Environment environment;
    private DeploymentResult deployment;

    // Getters and setters omitted
}

Environment.java

@JsonIgnoreProperties(ignoreUnknown = true)
public class Environment {
    private long id;
    private String name;
    private String deploymentProjectId;
    //Getters and setters omitted
}

DeploymentResult.java

@JsonIgnoreProperties(ignoreUnknown = true)
public class DeploymentResult {
    private long id;
    private String deploymentVersionName;
    // Getters and setters omitted
}

When I make the call to RestTemplate in my service class, the environmentStatuses array is null :

Service.java

ResponseEntity<List<ResultData>> response = restTemplate.exchange(uriBuilder.toUriString(),
                HttpMethod.GET, null, new ParameterizedTypeReference<List<ResultData>>() {});

return response.getBody();

Answer 1

private DeploymentResult deployment; is the next issue.. If you want this name in your code you need to annotate with the json structure name. or if not name it deploymentResult