杰克逊仅序列化接口方法 [英] Jackson serialize only interface methods

问题描述

我有一个对象 A ，其中包含 ma ， mb ， mc 等方法，此对象实现了一个接口 B 只有 ma 和 mb 。

I have one object A with some methods ma, mb, mc and this object implements an interface B with only ma and mb.

当我序列化 B时我希望只有 ma 和 mb 作为json响应，但我也可以 mc 。

When I serialize B I expect only ma and mb as a json response but I get as well 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。

I'd like to automatize this behaviour so that all the classes I serialize get serialized based on the interface and not on the implementation.

如何我应该这样做吗？

示例：

public interface Interf {
    public boolean isNo();

    public int getCountI();

    public long getLonGuis();
}

实施：

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;
    }

}

序列化：

    ObjectMapper mapper = new ObjectMapper();

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

    System.out.println(str);

回复：

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

预期回复：

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

推荐答案

只需注释你的界面，以便Jackson根据接口的类而不是底层对象的类来构造数据字段。

Just annotate your interface such that Jackson constructs data fields according to the interface's class and not the underlying object's class.

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

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