Как да получите публични данни от Google Spreadsheet с помощта на Java библиотека на Google Spreadsheet API без удостоверяване

- какво искам да правя

Бих искал да получа данни от Google Spreadsheet с помощта на Java библиотеката на Google Spreadsheet API без удостоверяване. Електронната таблица на Google се публикува публично. Бих искал да използвам следния метод: com.google.gdata.data.spreadsheet.CustomElementCollection

-Проблем

CustomElementCollection връща събиране на данни с удостоверяване. Но CustomElementCollection връща нула без удостоверяване.

Тъй като listEntry.getPlainTextContent() показва данни, така че мисля, че трябва да мога да получа данните по всякакви начини.

-Приложен изходен код

С удостоверяване: Auth.java

import java.net.URL;
import java.util.List;
import com.google.gdata.client.spreadsheet.ListQuery;
import com.google.gdata.client.spreadsheet.SpreadsheetService;
import com.google.gdata.data.spreadsheet.CustomElementCollection;
import com.google.gdata.data.spreadsheet.ListEntry;
import com.google.gdata.data.spreadsheet.ListFeed;
import com.google.gdata.data.spreadsheet.SpreadsheetEntry;
import com.google.gdata.data.spreadsheet.WorksheetEntry;

public class Auth {
    public static void main(String[] args) throws Exception{
        String applicationName = "AppName";
        String user = args[0];
        String pass = args[1];
        String key = args[2];
        String query = args[3];

        SpreadsheetService service = new SpreadsheetService(applicationName);
        service.setUserCredentials(user, pass); //set client auth 

        URL entryUrl = new URL("http://spreadsheets.google.com/feeds/spreadsheets/" + key);
        SpreadsheetEntry spreadsheetEntry = service.getEntry(entryUrl, SpreadsheetEntry.class);
        WorksheetEntry worksheetEntry = spreadsheetEntry.getDefaultWorksheet();

        ListQuery listQuery = new ListQuery(worksheetEntry.getListFeedUrl());
        listQuery.setSpreadsheetQuery( query );

        ListFeed listFeed = service.query(listQuery, ListFeed.class);
        List<ListEntry> list = listFeed.getEntries();
        for( ListEntry listEntry : list )
        {
            System.out.println( "content=[" + listEntry.getPlainTextContent() + "]");
            CustomElementCollection elements = listEntry.getCustomElements();
            System.out.println(
                    " name=" + elements.getValue("name") + 
                    " age="  + elements.getValue("age") );
        }
    }
}

Без удостоверяване: NoAuth.java

import java.net.URL;
import java.util.List;
import com.google.gdata.client.spreadsheet.FeedURLFactory;
import com.google.gdata.client.spreadsheet.ListQuery;
import com.google.gdata.client.spreadsheet.SpreadsheetService;
import com.google.gdata.data.spreadsheet.CustomElementCollection;
import com.google.gdata.data.spreadsheet.ListEntry;
import com.google.gdata.data.spreadsheet.ListFeed;
import com.google.gdata.data.spreadsheet.WorksheetEntry;
import com.google.gdata.data.spreadsheet.WorksheetFeed;

public class NoAuth {
    public static void main(String[] args) throws Exception{
        String applicationName = "AppName";
        String key = args[0];
        String query = args[1];

        SpreadsheetService service = new SpreadsheetService(applicationName);

        URL url = FeedURLFactory.getDefault().getWorksheetFeedUrl(key, "public", "basic");

        WorksheetFeed feed = service.getFeed(url, WorksheetFeed.class);
        List<WorksheetEntry> worksheetList = feed.getEntries();
        WorksheetEntry worksheetEntry = worksheetList.get(0);

        ListQuery listQuery = new ListQuery(worksheetEntry.getListFeedUrl());
        listQuery.setSpreadsheetQuery( query );

        ListFeed listFeed = service.query( listQuery, ListFeed.class );
        List<ListEntry> list = listFeed.getEntries();
        for( ListEntry listEntry : list )
        {
            System.out.println( "content=[" + listEntry.getPlainTextContent() + "]");
            CustomElementCollection elements = listEntry.getCustomElements();
            System.out.println(
                    " name=" + elements.getValue("name") + 
                    " age="  + elements.getValue("age") );
        }
    }
}

Google електронна таблица:

https://docs.google.com/spreadsheet/pub?key=0Ajawooo6A9OldHV0VHYzVVhTZlB6SHRjbGc5MG1CakE&output=html

-Резултат

Без удостоверяване

content=[възраст: 23] 　　　name=null възраст=null

С удостоверяване

content=[възраст: 23] 　　　name=Taro age=23

Моля, дайте ми полезна информация, за да избегна проблема.