使用 jackson 将命名列表反序列化为列表

Question

I want to deserialize json from String.class with this structure:

{"listName": [{"prop":"value"},{"prop":"value"}, ... ] }

to a List<PropVo> , where PropVo contains String prop as a field.

• I don't want to create a wrapper class with List<PropVo>
• I don't want to use substring

Is there an option just to deserialize to a list?

Answer 1

You can use a type reference to convert that JSON to a Map<String, List<PropVo>> :

Map<String, List<PropVo>> m = objectMapper.readValue(string, 
        new TypeReference<Map<String, List<PropVo>>>() {});

Answer 2

Another way is to use readTree

Example:

ObjectMapper om = new ObjectMapper();
JsonNode list = om.readTree(json).path("listName");
List<PropVo> result = Arrays.asList(om.treeToValue(list,PropVo[].class);