使用GAE数据存储多租户获取Java结果空白页

I have been trying to use Datastore Multitenancy for weeks now. And I can't seem to make it work. Every time I try to run it on my own (computer) server, it does not seem to display anything at all. I have also tried to publish it on the GAE server, but it still does not seem to display.I have been trying to use Datastore Multitenanc