import com.google.gdata.data.youtube.VideoFeed; //导入依赖的package包/类
/** returns an Item object given a keyword */
private Item youTubeSearch(String kw) throws Exception {
    // init service
    YouTubeService service = new YouTubeService(APP_NAME);
    YouTubeQuery query = new YouTubeQuery(new URL(FEED_URL));
    
    // order results by the relevance
    query.setOrderBy(ORDER_BY_PARAM);

    // search for keyword
    query.setFullTextQuery(kw);
    query.setMaxResults(MAX_SEARCH_RESULTS);
    query.setSafeSearch(SAFE_SEARCH_PARAM);

    // retrieve results
    VideoFeed videoFeed = service.query(query, VideoFeed.class);
    String content = localizeVideoFeed(videoFeed);
    return new Item(kw, content);
}
 

import com.google.gdata.data.youtube.VideoFeed; //导入依赖的package包/类
public List<YouTubeVideo> retrieveVideos(String textQuery, int maxResults, boolean filter, int timeout, int startIndex) throws Exception {

      YouTubeService service = new YouTubeService(clientID);
      service.setConnectTimeout(timeout); // millis
      YouTubeQuery query = new YouTubeQuery(new URL(YOUTUBE_URL));

      query.setOrderBy(YouTubeQuery.OrderBy.RELEVANCE);
      query.setFullTextQuery(textQuery);
      query.setSafeSearch(YouTubeQuery.SafeSearch.NONE);
      query.setMaxResults(maxResults);
      query.setStartIndex(startIndex);
      query.addCustomParameter(new Query.CustomParameter("hd", "true"));

      VideoFeed videoFeed = service.query(query, VideoFeed.class);  
      List<VideoEntry> videos = videoFeed.getEntries();

      return convertVideos(videos);

  }
 

import com.google.gdata.data.youtube.VideoFeed; //导入依赖的package包/类
/** converts a VideoFeed object to XML-style document */
private String localizeVideoFeed(VideoFeed videoFeed) {
    String content = "<m:Entries>";
    for(VideoEntry videoEntry : videoFeed.getEntries() ) {
      content += localizeVideoEntry(videoEntry);
    }
    content += "</m:Entries>";
    return content;
  }
 

import com.google.gdata.data.youtube.VideoFeed; //导入依赖的package包/类
@Override
public ActionForward execute(ActionMapping mapping, ActionForm form,
		HttpServletRequest request, HttpServletResponse response)
		throws Exception {

	Facade facade = Facade.getInstance();
	int idActivity = Integer.valueOf(request.getParameter("idActivity"));

	VideoIriz video = facade.getVideoByID(idActivity);
	String status = "activities.video.status.ok";
	String okStatus = "activities.video.status.ok";
	String watchLink = "";

	if (video.isUploaded()) {

		YouTubeService service = new YouTubeService(
				"ytapi-Amadeus-Amadeus-31t3bfbl-0",
				"AI39si4lPYVDXG8xROx-bAoe-vIODvTOcucDwRb-"
						+ "_2Ty6pesAsS3R2ybTp6D44a4FZy3Wi0dqls44Cur0-qiuDLCNdihPYBRmw");

		service.setAuthSubToken("CIyFvq-NDRCrmPDjBQ", null);

		String feedUrl = "http://gdata.youtube.com/feeds/api/users/amadeuslms/uploads";

		VideoFeed videoFeed;
		VideoEntry entry = null;
		try {
			videoFeed = service.getFeed(new URL(feedUrl), VideoFeed.class);

			for (VideoEntry videoInstance : videoFeed.getEntries()) { //search for the video entry
				if (UtilActivities.getVideoId(videoInstance.getId())
						.equals(video.getYoutubeId())) {
					entry = videoInstance;
				}
			}
			
			if(entry == null){
				status = "activities.video.status.invalidURL";
			}
			if (entry.isDraft()) {
				YtPublicationState pubState = entry.getPublicationState();
			if (pubState.getState() == YtPublicationState.State.PROCESSING) {
				status = "activities.video.status.processing";
			} else if (pubState.getState() == YtPublicationState.State.REJECTED) {
				status = "activities.video.status.rejected";
				//System.out.println(pubState.getDescription()); // why it was rejected
				//System.out.print("For help visit: ");
				//System.out.println(pubState.getHelpUrl());
			} else if (pubState.getState() == YtPublicationState.State.FAILED) {
				status = "activities.video.status.failed";
				//System.out.println(pubState.getDescription()); //why it failed
				//System.out.print("For help visit: ");
				//System.out.println(pubState.getHelpUrl());
			}
		}

		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	
	if(status.equals("activities.video.status.ok")){
		watchLink = "<a onclick='watchVideo" +
		"('"+ request.getContextPath() +"/jsp/course/content_management" +
		"/activities/video/iriz.jsp?idVideo="+ video.getYoutubeId() +"');' href='javascript" +
		":void(0);' ><bean:message key='activities.video.watch' /></a>";
	}else{
		watchLink = "<bean:message key='activities.video.watch' />";
	}

	request.setAttribute("watchLink", watchLink);
	request.setAttribute("video", video);
	request.setAttribute("status", status);
	request.setAttribute("okStatus", okStatus);
	
	return mapping.findForward(FORWARD_VIDEO_STATUS);
}
 

import com.google.gdata.data.youtube.VideoFeed; //导入依赖的package包/类
public List<String> lookupVideo(String searchTerm) throws IOException, ServiceException {
    List<String> results = new ArrayList<String>();
    YouTubeService service = new YouTubeService("savetheenvironment");

    YouTubeQuery query = new YouTubeQuery(new URL("http://gdata.youtube.com/feeds/api/videos"));
    query.setOrderBy(YouTubeQuery.OrderBy.VIEW_COUNT);


    query.setFullTextQuery(searchTerm);

    query.setSafeSearch(YouTubeQuery.SafeSearch.NONE);

    VideoFeed videoFeed = service.query(query, VideoFeed.class);

    for (VideoEntry videoEntry : videoFeed.getEntries()) {
        results.add(videoEntry.getTitle().getPlainText());
    }

    return results;
}