我正在尝试在项目中使用 YouTube 数据/分析 API，但如果我不拥有 channel ID，我不知道如何获取该 channel ID。我试图让所有现代音乐家/艺术家的 channel 来分析它们，但似乎无济于事。
我拥有的代码只是开发者网站上的标准代码。见下文。
package com.google.api.services.samples.youtube.cmdline.analytics;
import com.google.api.client.auth.oauth2.Credential;
import com.google.api.client.http.HttpTransport;
import com.google.api.client.http.javanet.NetHttpTransport;
import com.google.api.client.json.JsonFactory;
import com.google.api.client.json.jackson2.JacksonFactory;
import com.google.api.services.samples.youtube.cmdline.Auth;
import com.google.api.services.youtube.YouTube;
import com.google.api.services.youtube.model.Channel;
import com.google.api.services.youtube.model.ChannelListResponse;
import com.google.api.services.youtubeAnalytics.YouTubeAnalytics;
import com.google.api.services.youtubeAnalytics.model.ResultTable;
import com.google.api.services.youtubeAnalytics.model.ResultTable.ColumnHeaders;
import com.google.common.collect.Lists;
import java.io.IOException;
import java.io.PrintStream;
import java.math.BigDecimal;
import java.util.List;
/**
* This example uses the YouTube Data and YouTube Analytics APIs to retrieve
* YouTube Analytics data. It also uses OAuth 2.0 for authorization.
*
* @author Christoph Schwab-Ganser and Jeremy Walker
*/
public class YouTubeAnalyticsReports {
/**
* Define a global instance of the HTTP transport.
*/
private static final HttpTransport HTTP_TRANSPORT = new NetHttpTransport();
/**
* Define a global instance of the JSON factory.
*/
private static final JsonFactory JSON_FACTORY = new JacksonFactory();
/**
* Define a global instance of a Youtube object, which will be used
* to make YouTube Data API requests.
*/
private static YouTube youtube;
/**
* Define a global instance of a YoutubeAnalytics object, which will be
* used to make YouTube Analytics API requests.
*/
private static YouTubeAnalytics analytics;
/**
* This code authorizes the user, uses the YouTube Data API to retrieve
* information about the user's YouTube channel, and then fetches and
* prints statistics for the user's channel using the YouTube Analytics API.
*
* @param args command line args (not used).
*/
public static void main(String[] args) {
// These scopes are required to access information about the
// authenticated user's YouTube channel as well as Analytics
// data for that channel.
List<String> scopes = Lists.newArrayList(
"https://www.googleapis.com/auth/yt-analytics.readonly",
"https://www.googleapis.com/auth/youtube.readonly"
);
try {
// Authorize the request.
Credential credential = Auth.authorize(scopes, "analyticsreports");
// This object is used to make YouTube Data API requests.
youtube = new YouTube.Builder(HTTP_TRANSPORT, JSON_FACTORY, credential)
.setApplicationName("youtube-analytics-api-report-example")
.build();
// This object is used to make YouTube Analytics API requests.
analytics = new YouTubeAnalytics.Builder(HTTP_TRANSPORT, JSON_FACTORY, credential)
.setApplicationName("youtube-analytics-api-report-example")
.build();
// Construct a request to retrieve the current user's channel ID.
YouTube.Channels.List channelRequest = youtube.channels().list("id,snippet");
channelRequest.setMine(true);
channelRequest.setFields("items(id,snippet/title)");
ChannelListResponse channels = channelRequest.execute();
// List channels associated with the user.
List<Channel> listOfChannels = channels.getItems();
// The user's default channel is the first item in the list.
Channel defaultChannel = listOfChannels.get(0);
String channelId = defaultChannel.getId();
PrintStream writer = System.out;
if (channelId == null) {
writer.println("No channel found.");
} else {
writer.println("Default Channel: " + defaultChannel.getSnippet().getTitle() +
" ( " + channelId + " )\n");
printData(writer, "Views Over Time.", executeViewsOverTimeQuery(analytics, channelId));
printData(writer, "Top Videos", executeTopVideosQuery(analytics, channelId));
printData(writer, "Demographics", executeDemographicsQuery(analytics, channelId));
}
} catch (IOException e) {
System.err.println("IOException: " + e.getMessage());
e.printStackTrace();
} catch (Throwable t) {
System.err.println("Throwable: " + t.getMessage());
t.printStackTrace();
}
}
/**
* Retrieve the views and unique viewers per day for the channel.
*
* @param analytics The service object used to access the Analytics API.
* @param id The channel ID from which to retrieve data.
* @return The API response.
* @throws IOException if an API error occurred.
*/
private static ResultTable executeViewsOverTimeQuery(YouTubeAnalytics analytics,
String id) throws IOException {
return analytics.reports()
.query("channel==" + id, // channel id
"2012-01-01", // Start date.
"2012-01-14", // End date.
"views,uniques") // Metrics.
.setDimensions("day")
.setSort("day")
.execute();
}
/**
* Retrieve the channel's 10 most viewed videos in descending order.
*
* @param analytics the analytics service object used to access the API.
* @param id the string id from which to retrieve data.
* @return the response from the API.
* @throws IOException if an API error occurred.
*/
private static ResultTable executeTopVideosQuery(YouTubeAnalytics analytics,
String id) throws IOException {
return analytics.reports()
.query("channel==" + id, // channel id
"2012-01-01", // Start date.
"2012-08-14", // End date.
"views,subscribersGained,subscribersLost") // Metrics.
.setDimensions("video")
.setSort("-views")
.setMaxResults(10)
.execute();
}
/**
* Retrieve the demographics report for the channel.
*
* @param analytics the analytics service object used to access the API.
* @param id the string id from which to retrieve data.
* @return the response from the API.
* @throws IOException if an API error occurred.
*/
private static ResultTable executeDemographicsQuery(YouTubeAnalytics analytics,
String id) throws IOException {
return analytics.reports()
.query("channel==" + id, // channel id
"2007-01-01", // Start date.
"2012-08-14", // End date.
"viewerPercentage") // Metrics.
.setDimensions("ageGroup,gender")
.setSort("-viewerPercentage")
.execute();
}
/**
* Prints the API response. The channel name is printed along with
* each column name and all the data in the rows.
*
* @param writer stream to output to
* @param title title of the report
* @param results data returned from the API.
*/
private static void printData(PrintStream writer, String title, ResultTable results) {
writer.println("Report: " + title);
if (results.getRows() == null || results.getRows().isEmpty()) {
writer.println("No results Found.");
} else {
// Print column headers.
for (ColumnHeaders header : results.getColumnHeaders()) {
writer.printf("%30s", header.getName());
}
writer.println();
// Print actual data.
for (List<Object> row : results.getRows()) {
for (int colNum = 0; colNum < results.getColumnHeaders().size(); colNum++) {
ColumnHeaders header = results.getColumnHeaders().get(colNum);
Object column = row.get(colNum);
if ("INTEGER".equals(header.getUnknownKeys().get("dataType"))) {
long l = ((BigDecimal) column).longValue();
writer.printf("%30d", l);
} else if ("FLOAT".equals(header.getUnknownKeys().get("dataType"))) {
writer.printf("%30f", column);
} else if ("STRING".equals(header.getUnknownKeys().get("dataType"))) {
writer.printf("%30s", column);
} else {
// default output.
writer.printf("%30s", column);
}
}
writer.println();
}
writer.println();
}
}
}
任何指示都会很棒。提前致谢
最佳答案
这是我的方法，它有效，我在我的应用程序中使用它。在此代码片段中缺少 Helper 类，我用它来读取主方法中的开发人员 key 。
import com.google.api.client.googleapis.json.GoogleJsonResponseException;
import com.google.api.client.http.HttpRequest;
import com.google.api.client.http.HttpRequestInitializer;
import com.google.api.services.youtube.YouTube;
import com.google.api.services.youtube.model.Channel;
import com.google.api.services.youtube.model.ChannelListResponse;
import com.google.gdata.data.youtube.UserEventEntry;
import com.google.gdata.data.youtube.UserEventFeed;
import com.google.gdata.util.ServiceException;
import java.io.IOException;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
*
*/
public class UserHarvest {
private String username;
// all user public channels
private List<Channel> channels = new ArrayList<>();
// all user(channel) public activities
// https://developers.google.com/gdata/javadoc/com/google/gdata/data/youtube/UserEventEntry
private List<UserEventEntry> activities = new ArrayList<>();
// Max number of channels we want returned (minimum: 0, default: 5, maximum: 50)
private long maxNumChannels = 50;
//<editor-fold defaultstate="collapsed" desc="getters and setters">
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public List<Channel> getChannels() {
return channels;
}
public void setChannels(List<Channel> channels) {
this.channels = channels;
}
public List<UserEventEntry> getActivities() {
return activities;
}
public void setActivities(List<UserEventEntry> activities) {
this.activities = activities;
}
public long getMaxNumChannels() {
return maxNumChannels;
}
public void setMaxNumChannels(long maxNumChannels) {
this.maxNumChannels = maxNumChannels;
}
//</editor-fold>
public UserHarvest() {
}
public UserHarvest(String username) {
this.username = username;
}
/**
* Fetches a feed of activities and prints information about them.
*
* @param userA user name
* @throws java.io.IOException request exp
* @throws com.google.gdata.util.ServiceException service exp
*
*/
public void harvestUserActivities(String userA)
throws IOException, ServiceException {
UserEventFeed activityFeed = Helper.service.getFeed(new URL("http://gdata.youtube.com/feeds/api/events?author=" + userA),
UserEventFeed.class);
String title = activityFeed.getTitle().getPlainText();
Helper.printUnderlined(title);
if (activityFeed.getEntries().isEmpty()) {
System.out.println("This feed contains no entries.");
this.activities = null;
}
List<UserEventEntry> entries = new ArrayList<>();
for (UserEventEntry entry : activityFeed.getEntries()) {
entries.add(entry);
}
Helper.printUserActivities(activityFeed);
this.activities = entries;
}
/*
* Harvest users channels
*
* @param channelUsername name of user (channel)
*
*/
public void harvestChannels(String channelUsername) {
try {
// https://developers.google.com/resources/api-libraries/documentation/youtube/v3/java/latest/com/google/api/services/youtube/YouTube.Channels.List.html
YouTube.Channels.List channelRequest = Helper.youtube.channels().list("id,snippet,statistics,contentDetails");
channelRequest.setKey(Helper.developerKeyV3);
channelRequest.setFields("items(id,snippet,contentDetails/relatedPlaylists,statistics/videoCount,statistics/commentCount,brandingSettings/channel/title)");
channelRequest.setForUsername(channelUsername);
// max result parameter is 50
if (maxNumChannels > 50)
channelRequest.setMaxResults((long)50);
else
channelRequest.setMaxResults(maxNumChannels);
ChannelListResponse channelResponse = channelRequest.execute();
this.channels = channelResponse.getItems();
String nextToken = "";
// Loops over next channel page results
while (this.channels.size() < this.maxNumChannels) {
channelRequest.setPageToken(nextToken);
ChannelListResponse nextChannelResponse = channelRequest.execute();
this.channels.addAll(nextChannelResponse.getItems());
if (this.channels.size() > this.maxNumChannels){
this.channels = this.channels.subList(0, (int)this.maxNumChannels-1);
break;
}
nextToken = nextChannelResponse.getNextPageToken();
if (nextToken == null)
break;
}
Helper.prettyPrintObjects(this.channels.iterator(), "Channel");
} 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());
}
}
// main method for testing purposes
public static void main(String[] args) {
Helper.readDeveloperKeys();
//https://www.youtube.com/user/nqtv
UserHarvest usrHarvest = new UserHarvest("nqtv");
// Youtube API v2
try {
usrHarvest.harvestUserActivities("nqtv");
} catch (IOException ex) {
Logger.getLogger(VideoHarvest.class.getName()).log(Level.SEVERE, null, ex);
} catch (ServiceException ex) {
Logger.getLogger(VideoHarvest.class.getName()).log(Level.SEVERE, null, ex);
}
// Youtube API v3
try {
Helper.youtube = new YouTube.Builder(Helper.HTTP_TRANSPORT, Helper.JSON_FACTORY, new HttpRequestInitializer() {
public void initialize(HttpRequest request) throws IOException {
}
}).setApplicationName(Helper.APPLICATION_NAME).build();
//https://www.youtube.com/user/nqtv
usrHarvest.harvestChannels("nqtv");
} catch (Throwable t) {
t.printStackTrace();
}
}
}
关于java - 使用 YouTube API v3 从用户名 Java 获取 channel ID，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/27495942/