我有这样的班级结构：
responsebody.java文件：

public class ResponseBody {
    private String type;
    private A a;

    public static class A {
        private List<B> b;
    }
}

b、 java 语：

public class B {
    private String c;
    private DynamicJson dynamicJson;
}

dynamicjson.java文件：

@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, 
      include = As.PROPERTY, property = "type")
@JsonSubTypes({
        @JsonSubTypes.Type(value = Child1.class, name = "child-1"),
        @JsonSubTypes.Type(value = Child2.class, name = "child-2"),
        @JsonSubTypes.Type(value = Child3.class, name = "child-3")
})
public abstract class DynamicJson {
    private String onlyKnownField;
}

儿童1.java

@JsonTypeName("child-1")
public class Child1 extends DynamicJson {

// Number of fields and field names here change based on which implementation of Dynamic Json

}

同样，child2和child3类。
移除了构造函数、setter、getter。
我想在json下面强制转换/反序列化 ResponseBody.java 班级。

{
    "type": "child-1",
    "a": {
        "b": [
            {
                "c": "guid",
                "dynamicJson": {
                    "onlyKnownField": "guid", // only field that always comes
                    /*
                    dynamic number of fields based on "type", say 2 fields, if type is                                                                         
                    something else then number of fields here is different
                    */
                }
            }
        ]
    }
}

根据“type”值，“dynamicjson”字段可以有不同数量的字段，其中包含不同的名称。这似乎是问题所在，
这是正在使用的代码：

ObjectMapper objectMapper = new ObjectMapper();
ResponseBody responseBody = objectMapper.readValue(json.getBody(), ResponseBody.class);

但是，上面的代码给出了以下错误：

Missing type id when trying to resolve subtype of [simple type, class DynamicJson]

我做错什么了？
如果需要其他信息，请告诉我。