排序复合json时无法转换为java.lang.Comparable

Question

问题陈述：我正在尝试使用可比类和collections.sort对复合类进行排序，但出现异常。

class BmetData implements Comparable<BmetData>{ Long mId;
String mName;
String mPath;
String frequency;
List<MValue> mValues;

public int compareTo(BmetData o) {
    return mId.compareTo(o.mId);
}} 

SubClass-

class MValue implements Comparable<MValue> { Date startTimeInMillis;
Long current;
Long min;
Long max;
Long count;
Long sum;

Long value;

public int compareTo(MValue o) {
    return startTimeInMillis.compareTo(o.startTimeInMillis);
}}

我正在从API获取BmetData的响应列表，使用方法-解析api响应字符串-

public static <T> List<T> getJavaListFromJson(ApiResponseHolder apiResponse, Class<T> clazz) {

    if (apiResponse.getResponseCode() == 200) {

        Gson gson = new Gson();
        TypeToken<List<T>> token = new TypeToken<List<T>>() {
        };
        List<T> pojoList = gson.fromJson(apiResponse.getMessage(), token.getType());
        return pojoList;
    } else {

        return null;
    }
}

哪位还给我List<BmetData> list 现在尝试使用获取异常的Collections.sort（list）对其进行排序-

Exception in thread "main" java.lang.ClassCastException: com.google.gson.internal.LinkedTreeMap cannot be cast to java.lang.Comparable at java.util.ComparableTimSort.countRunAndMakeAscending(ComparableTimSort.java:320) at java.util.ComparableTimSort.sort(ComparableTimSort.java:188) at java.util.Arrays.sort(Arrays.java:1312) at java.util.Arrays.sort(Arrays.java:1506) at java.util.ArrayList.sort(ArrayList.java:1462) at java.util.Collections.sort(Collections.java:141) at Helper.ApiExecuterUsingToken.main(ApiExecuterUsingToken.java:70)

Answer 1

而不是使用Comparator进行比较。