Question

我从WebAPI收到以下格式的json响应：

{
    "Status": "Successful Request",
    "ErrorCode": 200,
    "ResultCount": 1,
    "Trends": {
        "39381": {
            "user_distance_units": 1,
            "total_sep": 0,
            "max_power": 0,
            "max_rpm": 0,
            "max_heart_rate_bpm": 0,
            "distance": 0,
            "avg_power": 0,
            "avg_rpm": 0,
            "avg_hr": 0,
            "calories": 0,
            "classes": "0",
            "max_avg_power": 0,
            "max_avg_rpm": 0,
            "max_avg_hr": 0
        }
    }
}

我正在尝试将其映射到POJO。我在使用杰克逊（Jackson）批注时遇到一些困难。 39381是客户端ID，出于某种原因，Web服务会为此提供响应。该客户端ID是动态的，并且在每次调用不同用户时都会更改。在这种情况下，我似乎无法使用Jackson批注@JsonProperty。映射变得更加复杂。由于我确实不需要客户端ID信息，因此我真的想跳过该信息，只需将数据映射到该Trends类：

@JsonInclude(JsonInclude.Include.NON_NULL)
@JsonPropertyOrder({ "user_distance_units", "total_sep", "max_power", "max_rpm", "max_heart_rate_bpm", "distance",
        "avg_power", "avg_rpm", "avg_hr", "calories", "classes", "max_avg_power", "max_avg_rpm", "max_avg_hr" })
public class Trends
{

    @JsonProperty("user_distance_units")
    private Integer userDistanceUnits;
    @JsonProperty("total_sep")
    private Integer totalSep;
    @JsonProperty("max_power")
    private Integer maxPower;
    @JsonProperty("max_rpm")
    private Integer maxRPM;
    @JsonProperty("max_heart_rate_bpm")
    private Integer maxHeartRateBPM;
    @JsonProperty("distance")
    private Integer distance;
    @JsonProperty("avg_power")
    private Integer avgPower;
    @JsonProperty("avg_rpm")
    private Integer avgRPM;
    @JsonProperty("avg_hr")
    private Integer avgHr;
    @JsonProperty("calories")
    private Integer calories;
    @JsonProperty("classes")
    private Integer classes;
    @JsonProperty("max_avg_power")
    private Integer maxAvgPower;
    @JsonProperty("max_avg_rpm")
    private Integer maxAvgRPM;
    @JsonProperty("max_avg_hr")
    private Integer maxAvgHr;
    @JsonIgnore
    private Map<String, Object> additionalProperties = new HashMap<String, Object>();

有没有办法做到这一点？

Answer 1

趋势以键在ClientId上的地图的形式返回。因此，您可以定义带有内部趋势图的顶级Response对象：

   class Response {
    @JsonProperty("Status")
    private String status;
    @JsonProperty("ErrorCode")
    private  int errorCode;
    @JsonProperty("ResultCount")
    private  int resultCount;
    @JsonProperty("Trends")
    private Map<String, Trends> trends;
   }

如果您不关心clientId，则可以添加一个getter，它只是尝试返回地图的第一个元素。

使用带有动态字段的Jackson注释反序列化JSON

1 个答案: