java - 如何将 JSON key 从 POJO 的 camelCase 更改为 snake case？

Question

我正在使用 Wiremock 进行测试，我有以下 POJO 示例:

 @Data
    public class DataResponse {
      private Supply supply;
      private static class Supply {
        private List<TimeSeries> timeSeries;
      }
      @JsonNaming(PropertyNamingStrategy.SnakeCaseStrategy.class)
      public  static class TimeSeries {
         private LocalDate date;
      }
    }

我正在 stub 一些外部 API，它应该以 json 的形式响应这个 POJO:

DataResponse dataResponse = DataResponse.builder()
   .supply(DataResponse.Supply.builder()
       .timeSeries(List.of(
           DataResponse.TimeSeries.builder()
             .date("2021-11-16")
              build()
        ))
        .build()
   .build()
 
 String jsonDataResponse = mapper.writeValueAsString(dataResponse); //mapper is instance of ObjectMapper
 
 stubFor(WireMock.get(urlEqualTo("/someUrl"))
     .willReturn(aResponse()
        .withBody(jsonDataResponse)));

问题是当我使用 ObjectMapper 进行序列化时，我得到的是“timeSeries”而不是“time_series”。有什么方法可以仅通过更改测试文件来获得正确的 JSON 字符串格式？

Answer 1

timeSeries是Supply的字段，你应该改变@JsonNaming(PropertyNamingStrategy.SnakeCaseStrategy.class)的位置，移动到供应类如下

    @Data
    public class DataResponse {
      private Supply supply;
      @JsonNaming(PropertyNamingStrategy.SnakeCaseStrategy.class)
      private static class Supply {
        private List<TimeSeries> timeSeries;
      }
      public  static class TimeSeries {
         private LocalDate date;
      }
    }