我之前也有過類似的問題,當時解決了這個問題。所以我們再來一次。eclipse中帶有應用引擎的java數據(gdata),java
doGet的內容非常有效,但是當我嘗試將它作爲eclipse爲我創建的servlet的一部分時,我會收到錯誤。它的外觀有點像我沒有在圖書館中引用適當的文件,但我想我是。
Java代碼看起來是這樣的:
package picasatest;
import java.io.IOException;
import java.net.URL;
import javax.servlet.http.*;
import com.google.gdata.client.photos.PicasawebService;
import com.google.gdata.data.photos.AlbumEntry;
import com.google.gdata.data.photos.UserFeed;
@SuppressWarnings("serial")
public class PicasaTestServlet extends HttpServlet {
public void doGet(HttpServletRequest req, HttpServletResponse resp)
throws IOException {
resp.setContentType("text/plain");
try {
PicasawebService service = new PicasawebService("Picasa test");
service.setUserCredentials("[email protected]", "password");
URL feedURL = new URL("http://picasaweb.google.com/data/feed/api/user/username?kind=album");
UserFeed feed = service.getFeed(feedURL, UserFeed.class);
for (AlbumEntry entry : feed.getAlbumEntries()) {
System.out.println(entry.getTitle().getPlainText());
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
我已經參考谷歌收集-1.0-rc2.jar,的mail.jar,activation.jar,它的servlet-api.jar文件,gdata-client.jar,gdata-client-meta.jar,gdata-core.jar,gdata-media.jar,gdata-photos-2.0.jar和gdata-photos-meta-2.0.jar,根據google的說明。我還有什麼要做的嗎?
而且我得到這個錯誤控制檯:
java.lang.NoClassDefFoundError: com/google/gdata/client/photos/PicasawebService
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Class.java:2357)
at java.lang.Class.getConstructor0(Class.java:2671)
at java.lang.Class.newInstance0(Class.java:321)
at java.lang.Class.newInstance(Class.java:303)
at org.mortbay.jetty.servlet.Holder.newInstance(Holder.java:153)
at org.mortbay.jetty.servlet.ServletHolder.getServlet(ServletHolder.java:339)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:463)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1093)
at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
at com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:124)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:360)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:712)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
at com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:54)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139)
at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:313)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139)
at org.mortbay.jetty.Server.handle(Server.java:313)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:506)
at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:830)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:514)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:381)
at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:396)
at org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:442)
什麼我已經錯過了任何想法?從谷歌集團「谷歌應用程序引擎的Java」
有同樣的問題...這是我的命......讓我看看它是否有效。 – Gaurav 2009-09-09 04:42:24