JSON 反序列化详解

JSON结构

{
  "code": 200,
  "msg": "success",
  "result": {
    "list": [
      { "lowprice": 1035.1, "highprice": 1049.9, ..., "code": "au9999" },
      ...
    ]
  }
}

DTO设计

@Data
public class GoldPriceApi {
    private String code;
    private String msg;
    private ResultData result;   

    @Data
    public static class ResultData {
        private List<PriceData> list;
    }
}

阿里巴巴FastJson

List<PriceData> list = JSON.parseObject(str, GoldPriceApi.class, JSONReader.Feature.SupportSmartMatch)  
        .getResult()  
        .getList();

Spring boot 原生Jackson

JsonMapper mapper = JsonMapper.builder()  
        .propertyNamingStrategy(PropertyNamingStrategies.LOWER_CASE)  
        .build();  
  
List<PriceData> list = mapper.readValue(str, GoldPriceApi.class)  
        .getResult()  
        .getList();