jackson individueller Deserializer nicht

Question

genannt Ich habe folgendes Endpunkt in der Nachrüstung:

@GET("user/detail") 
Observable<JacksonResponse<User>> getUserDetail(); 

Dieser Endpunkt liefert das folgende Ergebnis:

{ 
    "code":1012, 
    "status":"sucess", 
    "message":"Datos Del Usuario", 
    "time":"28-10-2015 10:42:04", 
    "data":{ 
    "id_hash":977417640, 
    "user_name":"Daniel", 
    "user_surname":"Hdz Iglesias", 
    "birthdate":"1990-02-07", 
    "height":190, 
    "weight":80, 
    "sex":2, 
    "photo_path":" https:\/\/graph.facebook.com 
    \/422\/picture?width=100&height=100" 
    } 
} 

Hier ist die Definition der Klasse ist:

public class JacksonResponse<T> { 

    private Integer code; 
    private String status; 
    private String message; 
    private String time; 
    @JsonInclude(JsonInclude.Include.NON_NULL) 
    private T data; 

    public JacksonResponse(){} 

    @JsonCreator 
    public JacksonResponse(
      @JsonProperty("code") Integer code, 
      @JsonProperty("status") String status, 
      @JsonProperty("message") String message, 
      @JsonProperty("time") String time, 
      @JsonProperty("data") T data) { 
     this.code = code; 
     this.status = status; 
     this.message = message; 
     this.time = time; 
     this.data = data; 
    } 

    public Integer getCode() { 
     return code; 
    } 

    public void setCode(Integer code) { 
     this.code = code; 
    } 

    public String getStatus() { 
     return status; 
    } 

    public void setStatus(String status) { 
     this.status = status; 
    } 

    public String getMessage() { 
     return message; 
    } 

    public void setMessage(String message) { 
     this.message = message; 
    } 

    public String getTime() { 
     return time; 
    } 

    public void setTime(String time) { 
     this.time = time; 
    } 

    public T getData() { 
     return data; 
    } 

    public void setData(T data) { 
     this.data = data; 
    } 

} 

Ich möchte, dass der Inhalt "Daten" der Benutzerklasse zugeordnet ist, deren Extrakt hier angezeigt wird:

@JsonIgnoreProperties(ignoreUnknown = true) 
@ModelContainer 
@Table(database = AppDatabase.class) 
public class User extends BaseModel { 

    @PrimaryKey(autoincrement = true) 
    private Long id; 
    @Column 
    private Long idFacebook; 
    @Column 
    @JsonProperty("user_name") 
    private String name; 
    @Column 
    @JsonProperty("user_surname") 
    private String surname; 
    @Column 
    private Date birthday; 
    @Column 
    @JsonProperty("height") 
    private Double height; 
    @Column 
    @JsonProperty("weight") 
    private Double weight; 
    @Column 
    private String tokenFacebook; 
    @Column 
    @JsonProperty("sex") 
    private Integer sex; 
    @Column 
    private String email; 
    @Column 
    private String token; 
    @Column 
    private Date lastActivity; 
    @Column 
    @JsonProperty("id_hash") 
    private Long idHash; 
    @Column 
    @JsonProperty("photo_path") 
    private String photoPath; 

Zum Geburtstag habe ich einen benutzerdefinierten Deserializer definiert, dessen Code zeigt hier:

public class BirthdayDeserializer extends JsonDeserializer<Date> { 
    @Override 
    public Date deserialize(JsonParser jsonparser, DeserializationContext deserializationcontext) throws IOException { 

     SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); 
     String date = jsonparser.getText(); 
     try { 
      return format.parse(date); 
     } catch (ParseException e) { 
      throw new RuntimeException(e); 
     } 
    } 

} 

ich dies mit als (bei User-Klasse) folge:

@JsonProperty("birthday") 
@JsonDeserialize(using = BirthdayDeserializer.class) 
public void setBirthday(Date birthday) { 
    this.birthday = birthday; 
} 

aber wird nie genannt.

Irgendeine Idee was ist los?

Answer 1

Sie Pojo und JSON nicht zuordnen. Sie müssen eine Data.java haben, die Eigenschaften wie in JSON angegeben haben sollte. Ihre Klassen sollten wie folgt sein, basierend auf dem oben angegebenen JSON.

User.java

import com.fasterxml.jackson.annotation.JsonIgnoreProperties; 
import com.fasterxml.jackson.annotation.JsonProperty; 

@JsonIgnoreProperties(ignoreUnknown = true) 
public class User { 

    @JsonProperty("code") 
    public Integer code; 
    @JsonProperty("status") 
    public String status; 
    @JsonProperty("message") 
    public String message; 
    @JsonProperty("time") 
    public String time; 
    @JsonProperty("data") 
    public Data data; 

} 

Data.java

import com.fasterxml.jackson.annotation.JsonIgnoreProperties; 
import com.fasterxml.jackson.annotation.JsonProperty; 
import com.fasterxml.jackson.databind.annotation.JsonDeserialize; 

@JsonIgnoreProperties(ignoreUnknown = true) 
public class Data { 

    @JsonProperty("id_hash") 
    public Integer idHash; 
    @JsonProperty("user_name") 
    public String userName; 
    @JsonProperty("user_surname") 
    public String userSurname; 
    @JsonProperty("birthdate") 
    @JsonDeserialize(using = BirthdayDeserializer.class) 
    public Date birthdate; 
    @JsonProperty("height") 
    public Integer height; 
    @JsonProperty("weight") 
    public Integer weight; 
    @JsonProperty("sex") 
    public Integer sex; 
    @JsonProperty("photo_path") 
    public String photoPath; 

} 

Main.java es zu testen.

public class Main { 

    public static void main(String[] args) throws IOException { 

     String json = "{\n" + 
       " \"code\": 1012,\n" + 
       " \"status\": \"sucess\",\n" + 
       " \"message\": \"Datos Del Usuario\",\n" + 
       " \"time\": \"28-10-2015 10:42:04\",\n" + 
       " \"data\": {\n" + 
       "  \"id_hash\": 977417640,\n" + 
       "  \"user_name\": \"Daniel\",\n" + 
       "  \"user_surname\": \"Hdz Iglesias\",\n" + 
       "  \"birthdate\": \"1990-02-07\",\n" + 
       "  \"height\": 190,\n" + 
       "  \"weight\": 80,\n" + 
       "  \"sex\": 2\n" + 
       " }\n" + 
       "}"; 
     ObjectMapper mapper = new ObjectMapper(); 
     SimpleModule module = new SimpleModule(); 
     module.addDeserializer(Date.class, new BirthdayDeserializer()); 
     mapper.registerModule(module); 
     User readValue = mapper.readValue(json, User.class); 
    } 
}