我有一个类似于这个的类:
public static class Stats implements Serializable {
private static final long serialVersionUID = 1L;
@Persistent(serialized = "true", defaultFetchGroup="true")
private Map<String, Integer> requests;
public Stats() {
requests = new HashMap<String, Integer>();
}
}
但是,Appengine 抱怨说HashMap is not a supported property type.
那么如何使用 Appengine 存储“HashMap”呢?还有其他解决方法吗?