我遇到了一个问题。我正在调用我的Web服务器，它返回给我一个JSON字符串。在这个JSON字符串中，我有几个如下所示的对象：

public class Transaction {

    private int id;
    private LocalDateTime datetime;
    private double quantity;
    private double avgPrice;

    public ArrayList<Transaction> parseJsonToList(String StrJSON) {

        Gson gson = new GsonBuilder().registerTypeAdapter(LocalDateTime.class, (JsonDeserializer<LocalDateTime>) (json, type, jsonDeserializationContext) -> {
            try{
                return LocalDateTime.parse(json.getAsJsonPrimitive().getAsString(), DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
            } catch (DateTimeParseException e){
                return LocalDateTime.parse(json.getAsJsonPrimitive().getAsString(), DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss.SSSSSS"));
            }
        }).create();

        Type listType = new TypeToken<ArrayList<Transaction>>() {}.getType();

        return gson.fromJson(StrJSON, listType);

    }

}

现在，当我调用parseJsonToList()方法时，我创建了一个GsonBuilder，它应该将日期时间从JSON转换为LocalDateTime属性（有或没有微时间）。我现在遇到的问题是，一些日期时间值是0000-00-00 00:00:00。这给我带来了以下错误：

Exception in thread "main" java.time.format.DateTimeParseException: Text '0000-00-00 00:00:00' could not be parsed at index 19
    at java.base/java.time.format.DateTimeFormatter.parseResolved0(DateTimeFormatter.java:2051)
    at java.base/java.time.format.DateTimeFormatter.parse(DateTimeFormatter.java:1953)
    at java.base/java.time.LocalDateTime.parse(LocalDateTime.java:493)
    at com.company.Transaction.lambda$parseJsonToList$1(Transaction.java:109)
    at com.google.gson.TreeTypeAdapter.read(TreeTypeAdapter.java:58)
    at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.read(ReflectiveTypeAdapterFactory.java:103)
    at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:196)
    at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.read(TypeAdapterRuntimeTypeWrapper.java:40)
    at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:81)
    at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:60)
    at com.google.gson.Gson.fromJson(Gson.java:810)
    at com.google.gson.Gson.fromJson(Gson.java:775)
    at com.google.gson.Gson.fromJson(Gson.java:724)

现在我不能更改JSON，那么有没有办法仍然存储它或使用空值？