我已经尝试了上千种方法。到目前为止，我查询任何东西的唯一方法是获得整个列表，并通过这种方式查看它！这需要很多时间。我如何在谷歌应用程序引擎中查询一些东西，例如只拉有〉100票的实体，例如。
尝试用户光标，但不知道它如何工作。我知道它可以使用光标，但我如何设置它与谷歌应用引擎，因为我的数据库不是在我的应用程序每说？
我试过了...但是这根本不起作用。

Cursor cursor = ("select * from Votes WHERE Votes >" + 250 , null);
quotes endpoint.listquotes().setCursor(cursor).execute();

和

String query  = ("select * from Votes WHERE Votes >= 40");
    quotes endpoint.listquotes().setCursor(query).execute();

我下面的井字游戏的例子https://github.com/GoogleCloudPlatform/appengine-endpoints-tictactoe-java和https://developers.google.com/eclipse/docs/endpoints-addentities在这个例子中，我只是把笔记换成了引号。
下面是我目前的代码，例如我如何获得实体。

protected CollectionResponseQuotes doInBackground(Context... contexts) {

  Quotesendpoint.Builder endpointBuilder = new Quotesendpoint.Builder(
      AndroidHttp.newCompatibleTransport(),
      new JacksonFactory(),
      new HttpRequestInitializer() {
      public void initialize(HttpRequest httpRequest) { }
      });
  Quotesendpoint endpoint = CloudEndpointUtils.updateBuilder(
  endpointBuilder).build();
  try {

  quotes = endpoint.listquotes().execute();

   for (Quotes quote : quotes.getItems()) {

       if (quote.getVotes() > 3) {

       quoteList.add(quote);

        }  

 }

这是我创建端点时Google在应用引擎中为我生成的代码。看起来它会以某种方式进行查询，但我无法理解。它们是两个不同的项目。

@Api(name = "quotesendpoint", namespace = @ApiNamespace(ownerDomain = "projectquotes.com"           ownerName = "projectquotes.com", packagePath = ""))
 public class quotesEndpoint {

/**
 * This method lists all the entities inserted in datastore.
 * It uses HTTP GET method and paging support.
 *
 * @return A CollectionResponse class containing the list of all entities
 * persisted and a cursor to the next page.
 */
@SuppressWarnings({ "unchecked", "unused" })
@ApiMethod(name = "listquotes")
public CollectionResponse<quotes> listquotes(
        @Nullable @Named("cursor") String cursorString,
        @Nullable @Named("limit") Integer limit) {

 EntityManager mgr = null;
Cursor cursor = null;
List<quotes> execute = null;

try {
    mgr = getEntityManager();
    Query query = mgr.createQuery("select from quotes as quotes");
    if (cursorString != null && cursorString != "") {
        cursor = Cursor.fromWebSafeString(cursorString);
        query.setHint(JPACursorHelper.CURSOR_HINT, cursor);
    }

    if (limit != null) {
        query.setFirstResult(0);
        query.setMaxResults(limit);
    }

    execute = (List<quotes>) query.getResultList();
    cursor = JPACursorHelper.getCursor(execute);
    if (cursor != null)
        cursorString = cursor.toWebSafeString();

    // Tight loop for fetching all entities from datastore and accomodate
    // for lazy fetch.
    for (quotes obj : execute)
        ;
} finally {
    mgr.close();
}

return CollectionResponse.<quotes> builder().setItems(execute)
        .setNextPageToken(cursorString).build();