Question

我需要序列化以下类：

@JsonSerialize(using = ItemSerializer.class)
public class Project {
    @JsonProperty
    public Map<String, Field> fields = new HashMap<String, Field>();
}

Field类：

public class Field {
    public String name;
    @JsonIgnore
    public boolean isStringField;
    public Field(String name, boolean isStringField) {
        this.name = name;
        this.isStringField = isStringField;
    }
}

序列化功能：

@Override
public void serialize(...) throws ... {
    jgen.writeStartObject();       
    for(Map.Entry<String, Field> entry : value.fields.entrySet()){
        if(entry.getValue().isStringField){
            jgen.writeStringField(entry.getKey(), entry.getValue().name);
        }else{
            jgen.writeObjectField(entry.getKey(), entry.getValue());
        }
    }
    jgen.writeEndObject();

JSON我得到的几乎就是我需要的东西：

{
   "fieldValue4": {
   "name": "field4"
  },
   "fieldValue3": {
   "name": "field3"
  },
   "fieldValue2": {
   "name": "field2"
  },
  "fieldValue1": "field1"
}

除了名为 fileds 的父元素（来自Project类的变量名）不在此JSON中。如何将其添加到结果JSON中以获得类似：

{
    "fields": {
        "fieldValue4": {
        "name": "field4"
        },
        "fieldValue3": {
        "name": "field3"
        },
        "fieldValue2": {
        "name": "field2"
        },
        "fieldValue1": "field1"
     }
}

Answer 1

由于您已经指定了自己的自定义序列化程序，因此在序列化gen.writeObjectFieldStart("fields");地图之前只需指定fields

杰克逊JSON自定义地图序列化与顶级值

1 个答案: