java - Jackson 序列化没有属性

Question

我有一个像这样的 json 结构:

{
    "name": "LS",
    "stocks": [
      {
        "x": 1500234365000,
        "y": 0.000000000000
      },
      {
        "x": 1500234427000,
        "y": 0.000015154000
      },
      {
        "x": 1500234481000,
        "y": 0.000015518740
      },
      {
        "x": 1500234548000,
        "y": 0.008415518740
      }
    ]
 }

但是我需要我的 json 看起来像这样:

{
    "name": "LS",
    "stocks": [
      [1500234365000,0.000000000000],
      [1500234427000,0.000015154000],
      [1500234481000,0.000015518740],
      [1500234548000,0.008415518740]
    ]
 }

我的映射类:

public class View implements Serializable {
    private static final long serialVersionUID = 1636349140413063122L;

    @Getter @Setter
    private String name;

    @JsonInclude(Include.NON_EMPTY)
    @Getter @Setter
    private List<Data> rates = new ArrayList<Data>();
}

和数据数组:

public class Data implements Serializable {
    private static final long serialVersionUID = 2926346626990185211L;

    @JsonProperty("x")
    @Getter @Setter
    private Long date;

    @JsonProperty("y")
    @Getter @Setter
    private BigDecimal value;

有什么本地方法可以做到这一点吗？我搜索了 stackoverflow 和 jackson 文档，但没有找到如何删除属性名称的信息。

不知道是否可行。

无论如何，我使用 spring boot 和 Jackson

Answer 1

你可以自定义一个json序列化类

public class MyStdSerializer extends StdSerializer<Data> {

    public MyStdSerializer(){
        this(null);
    }
    public MyStdSerializer(Class<Data> t) {
        super(t);
    }


    @Override
    public void serialize(Data value, JsonGenerator jgen, SerializerProvider provider)
            throws IOException, JsonGenerationException {

        jgen.writeStartArray();
        jgen.writeNumber(value.getDate());
        jgen.writeNumber(value.getValue());
        jgen.writeEndArray();

    }

}

然后:

@JsonSerialize(using=MyStdSerializer.class)
public class Data implements Serializable{

     private static final long serialVersionUID = 2926346626990185211L;

        @JsonProperty("x")
        private Long date;

        @JsonProperty("y")
        private BigDecimal value;

        public Long getDate() {
            return date;
        }

        public void setDate(Long date) {
            this.date = date;
        }

        public BigDecimal getValue() {
            return value;
        }

        public void setValue(BigDecimal value) {
            this.value = value;
        }

}