[Java] Youtube API 사용해보기

public class Search {

	private Map<String, String> resultMap;

	private final HttpTransport HTTP_TRANSPORT = new NetHttpTransport();
	private final JsonFactory JSON_FACTORY = new JacksonFactory();
	private final long NUMBER_OF_VIDEOS_PERTURNED = 25;
	private YouTube youtube;
	private List<SearchResult> searchResultList;

	public Search() {
		resultMap = new HashMap<String, String>();
	}

	public void searchKeyword() {

		try {
			youtube = new YouTube.Builder(HTTP_TRANSPORT, JSON_FACTORY, new HttpRequestInitializer() {

				public void initialize(HttpRequest arg0) throws IOException {
				}
			}).setApplicationName("youtube-cmdline-search-sample").build();

			String queryTerm = getInputQuery();

			YouTube.Search.List search = youtube.search().list("id,snippet");

			// API KEY
			search.setKey("");
			search.setQ(queryTerm);

			/*
			 * 비디오만 검색하도록 한다.
			 */
			search.setType("video");

			search.setFields("items(id/kind,id/videoId,snippet/title,snippet/thumbnails/default/url)");
			search.setMaxResults(NUMBER_OF_VIDEOS_PERTURNED);
			SearchListResponse searchResponse = search.execute();

			searchResultList = searchResponse.getItems();

			if (searchResultList != null) {
				prettyPrint(searchResultList.iterator(), queryTerm);
			}

		} catch (GoogleJsonResponseException e) {
			System.err.println(
					"There was a service error: " + e.getDetails().getCode() + " : " + e.getDetails().getMessage());
		} catch (IOException e) {
			System.err.println("There was an IO error: " + e.getCause() + " : " + e.getMessage());
		} catch (Throwable t) {
			t.printStackTrace();
		}
	}

	private String getInputQuery() throws IOException {

		String inputQuery = "";
		System.out.println("Please enter a search term : ");
		BufferedReader bReader = new BufferedReader(new InputStreamReader(System.in));
		inputQuery = bReader.readLine();

		if (inputQuery.length() < 1) {

			inputQuery = "Youtube Developers Live";
		}

		return inputQuery;
	}

	private void prettyPrint(Iterator<SearchResult> iteratorSearchResults, String query) {
		System.out.println("\n====================================================================");
		System.out.println("   First " + NUMBER_OF_VIDEOS_PERTURNED + " videos for search on \"" + query + "\".");
		System.out.println("====================================================================\n");

		int count = 1;
		while (iteratorSearchResults.hasNext()) {
			System.out.println("=======================" + count + "=======================");

			SearchResult singleVideo = iteratorSearchResults.next();
			ResourceId rId = singleVideo.getId();

			if (rId.getKind().equals("youtube#video")) {
				Thumbnail thumbnail = (Thumbnail) singleVideo.getSnippet().getThumbnails().get("default");

				System.out.println(" Video Id  :" + rId.getVideoId());
				System.out.println(" Title     : " + singleVideo.getSnippet().getTitle());

				System.out.println(" Thumbnail : " + thumbnail.getUrl());
				System.out.println("====================================================================\n");

				resultMap.put(singleVideo.getSnippet().getTitle(), rId.getVideoId());

				count += 1;
			}
		}
	}

	public Map<String, String> getResultMap() {
		return resultMap;
	}

	public void initResutMap() {
		this.resultMap.clear();
	}

	public String getVideoKey(int key) {
		Iterator<String> iterator = resultMap.keySet().iterator();
		String data = null;
		for (int i = 0; i < key; ++i) {
			data = (String)iterator.next();
		}

		//https://www.youtube.com/watch?v=_rI-E9TnCQA
		//result.put(data, "https://www.youtube.com/watch?v=_"+resultMap.get(data));
		
		return data;
	}