带Jackson的JSON动态字段名

import com.fasterxml.jackson.annotation.JsonAnyGetter;
import com.fasterxml.jackson.annotation.JsonAnySetter;
import com.fasterxml.jackson.databind.ObjectMapper;

import java.util.HashMap;
import java.util.Map;

public class DynamicFieldExample {
    private Map<String, Object> dynamicFields = new HashMap<>();

    @JsonAnyGetter
    public Map<String, Object> getDynamicFields() {
        return dynamicFields;
    }

    @JsonAnySetter
    public void setDynamicField(String fieldName, Object value) {
        dynamicFields.put(fieldName, value);
    }

    public static void main(String[] args) throws Exception {
        ObjectMapper objectMapper = new ObjectMapper();

        DynamicFieldExample example = new DynamicFieldExample();
        example.setDynamicField("field1", "value1");
        example.setDynamicField("field2", 123);

        String json = objectMapper.writeValueAsString(example);
        System.out.println(json);

        DynamicFieldExample deserializedExample = objectMapper.readValue(json, DynamicFieldExample.class);
        System.out.println(deserializedExample.getDynamicFields());
    }
}