Question

我在与Jackson的Spring Boot 1.5应用程序中将JSON反序列化为Java对象时遇到了一些麻烦。

如下所示，JSON响应是一个由具有一些嵌套属性的单个JSON对象组成的数组：

[
  {
    "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

我不关心deploymentProject属性，所以我只在environmentStatuses中加入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
}

当我在服务类中调用RestTemplate时，environmentStatuses数组为null：

Service.java

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

return response.getBody();

Answer 1

public ArrayList<SectionsBean> getAllSectionsByClassesID(){ String selectQuery = "SELECT " + "1 AS" + BaseColumns._ID + "," + COLUMN_CLASSES_NAME + "," + COLUMN_CLASSLINK + "," + COLUMN_CLASSES_SECTIONS_NAME + "," + COLUMN_SECTIONLINK + " FROM " + TABLE_CLASSES_SECTIONS_LINK + " INNER JOIN " + TABLE_CLASSES + " ON " + TABLE_CLASSES + "." + COLUMN_CLASSES_ID + " = " + TABLE_CLASSES_SECTIONS_LINK + "." + COLUMN_CLASSLINK + " INNER JOIN " + TABLE_CLASSES_SECTIONS + " ON " + TABLE_CLASSES_SECTIONS + "." + COLUMN_CLASSES_SECTIONS_ID + " = " + TABLE_CLASSES_SECTIONS_LINK + "." + COLUMN_SECTIONLINK ; SQLiteDatabase db = this.getReadableDatabase(); ArrayList<SectionsBean> sectionsBeanList = new ArrayList<SectionsBean>(); Cursor cursor = db.rawQuery(selectQuery,null); Log.i("Query details", String.valueOf(cursor)); Log.d("DataDetails", DatabaseUtils.dumpCursorToString(cursor)); while (cursor.moveToNext()) { ClassesBean classesBean = new ClassesBean(); classesBean.setId(cursor.getLong(cursor.getColumnIndex(COLUMN_CLASSES_ID))); classesBean.setClasses_name(cursor.getString(cursor.getColumnIndex(COLUMN_CLASSES_NAME))); SectionsBean sectionsBean = new SectionsBean(); sectionsBean.setSectionsID(cursor.getLong(cursor.getColumnIndex(COLUMN_CLASSES_SECTIONS_ID))); sectionsBean.setSections_name(cursor.getString(cursor.getColumnIndex(COLUMN_CLASSES_SECTIONS_NAME))); sectionsBean.setClassesBean(classesBean); sectionsBeanList.add(sectionsBean); } return sectionsBeanList; }是下一个问题.. 如果您希望在代码中使用此名称，则需要使用json结构名称进行批注。或者如果没有将其命名为private DeploymentResult deployment;

使用RestTemplate和Jackson

1 个答案: