Jackson：忽略父类属性：将json反序列化为数据(Jackson: Parent class Properties are ignored: Deserializes json into data)

 我试图将JSON（myJson.json）对象转换为Java类。 
 
 使用以下如何将Java对象转换为来自Json Jackson @Mykong的代码。 
 
  //2. Convert JSON to Java object
   ObjectMapper mapper = new ObjectMapper();
   StudentInfoDTO student = mapper.readValue(new File("c:\\myJson.json"), StudentInfoDTO.class);
 
 但是上面的ObjectMapper unable to map the Parent(StudentDTO) Class Properties(loggedInUser,createdBy,...). 
 
 是否有任何@annotations也可以映射父类属性。 
 
 欢迎任何建议。 
 
 我有以下 - StudentInfoDTO，AddressDTO，StudentDTO，SkillsDTO和myJson.json。 
 
 StudentInfoDTO： 
 
public class StudentInfoDTO extends StudentDTO implements Serializable{
private static final long serialVersionUID = 1L;
private AddressDTO address;
private String studentName;
....getters and setters

}
 
 AddressDTO： 
 
 public class AddressDTO implements Serializable{
    private static final long serialVersionUID = 1L;
    private String street;
    private String city;
    private String state;
    private String country;
    private Long zipcode;
    ....getters and setters

    }
 
 StudentDTO： 
 
 public class StudentDTO implements Serializable{
    private static final long serialVersionUID = 1L;
    private String loggedInUser;
    private String createdBy;
    private Date createdTs;
    private String updatedBy;
    private Date updatedTs;
    private List<skillsDTO> skills;
    ....getters and setters

    }
 
 myJson.json 
 
 {
   "address": 
      {
        "street": "Hunterfly Place",
        "city": "Dunlo",
        "state": "Arizona",
        "country": "Colorado",
        "zipcode": "1631",
      },
    "studentName": "John",

    "loggedInUser": "Admin",
    "createdBy": "System",
    "createdTs": "03-19-2011 14:53",
    "updatedBy": "John",
    "updatedTs": "06-11-2014 08:00",
    "skills": [
        {
            "skill": "Football",
            "grade": "A"
        },
        {
            "skill": "Swimming",
            "grade": "C"
        },
        {
            "skill": "Dance",
            "grade": "A"
        }]

    }
 
 我的错误日志： 
 
03:29:03,132 ERROR [stderr] (http-localhost-127.0.0.1-8080-2) org.codehaus.jackson.map.exc.UnrecognizedPropertyException: Unrecognized field "loggedInUser" (Class com.mySchool.project.services.StudentInfoDTO), not marked as ignorable
03:29:03,133 ERROR [stderr] (http-localhost-127.0.0.1-8080-2)  at [Source: c:\myJson.json; line: 51, column: 23] (through reference chain: com.mySchool.project.services.StudentInfoDTO["address"]->com.mySchool.project.services.StudentInfoDTO["loggedInUser"])

03:29:03,133 ERROR [stderr] (http-localhost-127.0.0.1-8080-2)   at org.codehaus.jackson.map.exc.UnrecognizedPropertyException.from(UnrecognizedPropertyException.java:53)

03:29:03,134 ERROR [stderr] (http-localhost-127.0.0.1-8080-2)   at org.codehaus.jackson.map.deser.StdDeserializationContext.unknownFieldException(StdDeserializationContext.java:246)

I am trying to convert the JSON(myJson.json) object into Java Class.
 
Using the following How to convert Java Object to From Json Jackson @Mykong code.
 
  //2. Convert JSON to Java object
   ObjectMapper mapper = new ObjectMapper();
   StudentInfoDTO student = mapper.readValue(new File("c:\\myJson.json"), StudentInfoDTO.class);
 
But the above ObjectMapper is unable to map the Parent(StudentDTO) Class Properties(loggedInUser,createdBy,...). 
 
Are there any @annotations which can map the Parent Class Properties as well.
 
Any suggestions are welcome.
 
I am having the following - StudentInfoDTO, AddressDTO, StudentDTO, SkillsDTO and myJson.json.
 
StudentInfoDTO:
 
public class StudentInfoDTO extends StudentDTO implements Serializable{
private static final long serialVersionUID = 1L;
private AddressDTO address;
private String studentName;
....getters and setters

}
 
AddressDTO:
 
 public class AddressDTO implements Serializable{
    private static final long serialVersionUID = 1L;
    private String street;
    private String city;
    private String state;
    private String country;
    private Long zipcode;
    ....getters and setters

    }
 
StudentDTO:
 
 public class StudentDTO implements Serializable{
    private static final long serialVersionUID = 1L;
    private String loggedInUser;
    private String createdBy;
    private Date createdTs;
    private String updatedBy;
    private Date updatedTs;
    private List<skillsDTO> skills;
    ....getters and setters

    }
 
myJson.json
 
 {
   "address": 
      {
        "street": "Hunterfly Place",
        "city": "Dunlo",
        "state": "Arizona",
        "country": "Colorado",
        "zipcode": "1631",
      },
    "studentName": "John",

    "loggedInUser": "Admin",
    "createdBy": "System",
    "createdTs": "03-19-2011 14:53",
    "updatedBy": "John",
    "updatedTs": "06-11-2014 08:00",
    "skills": [
        {
            "skill": "Football",
            "grade": "A"
        },
        {
            "skill": "Swimming",
            "grade": "C"
        },
        {
            "skill": "Dance",
            "grade": "A"
        }]

    }
 
My Error Log: 
 
03:29:03,132 ERROR [stderr] (http-localhost-127.0.0.1-8080-2) org.codehaus.jackson.map.exc.UnrecognizedPropertyException: Unrecognized field "loggedInUser" (Class com.mySchool.project.services.StudentInfoDTO), not marked as ignorable
03:29:03,133 ERROR [stderr] (http-localhost-127.0.0.1-8080-2)  at [Source: c:\myJson.json; line: 51, column: 23] (through reference chain: com.mySchool.project.services.StudentInfoDTO["address"]->com.mySchool.project.services.StudentInfoDTO["loggedInUser"])

03:29:03,133 ERROR [stderr] (http-localhost-127.0.0.1-8080-2)   at org.codehaus.jackson.map.exc.UnrecognizedPropertyException.from(UnrecognizedPropertyException.java:53)

03:29:03,134 ERROR [stderr] (http-localhost-127.0.0.1-8080-2)   at org.codehaus.jackson.map.deser.StdDeserializationContext.unknownFieldException(StdDeserializationContext.java:246)

原文：https://stackoverflow.com/questions/26992338