杰克逊仅序列化接口方法

Question

我有一个对象甲一些方法毫安,MB,MC和该对象实现了接口乙仅毫安和MB.

当我序列化B时,我期望只有ma和mb作为json响应,但我也得到了mc.

我想自动化这种行为,以便我序列化的所有类都基于接口而不是实现来序列化.

我该怎么办？

例:

public interface Interf {
    public boolean isNo();

    public int getCountI();

    public long getLonGuis();
}

执行:

public class Impl implements Interf {

    private final String patata = "Patata";

    private final Integer count = 231321;

    private final Boolean yes = true;

    private final boolean no = false;

    private final int countI = 23;

    private final long lonGuis = 4324523423423423432L;

    public String getPatata() {
        return patata;
    }


    public Integer getCount() {
        return count;
    }


    public Boolean getYes() {
        return yes;
    }


    public boolean isNo() {
        return no;
    }


    public int getCountI() {
        return countI;
    }

    public long getLonGuis() {
        return lonGuis;
    }

}

连载:

    ObjectMapper mapper = new ObjectMapper();

    Interf interf = new Impl();
    String str = mapper.writeValueAsString(interf);

    System.out.println(str);

响应:

 {
    "patata": "Patata",
    "count": 231321,
    "yes": true,
    "no": false,
    "countI": 23,
    "lonGuis": 4324523423423423500
} 

预期回复:

 {
    "no": false,
    "countI": 23,
    "lonGuis": 4324523423423423500
 } 

Answer 1

只需注释您的界面,以便Jackson根据接口的类而不是底层对象的类构造数据字段.

@JsonSerialize(as=Interf.class)
public interface Interf {
  public boolean isNo();
  public int getCountI();
  public long getLonGuis();
}

Answer 2

您有两个选择：

1）@JsonSerialize在您的界面上添加注释（请参阅@broc.seib 答案）

2) 或使用特定的 writer 进行序列化（从 Jackson 2.9.6 开始）：

ObjectMapper mapper = new ObjectMapper();
String str = mapper.writerFor(Interf.class).writeValueAsString(interf);