几周前，我使用 NetBeans 创建了其中一个 javafx 示例
webview 项目，它运行良好。
我对使用 javafx
在 swinginterop 应用程序中播放 youtube 视频特别感兴趣。
这是一个更大项目的一部分，所以我使用 NetBeans
中的 SwingInterop 示例将播放器加载到 JFrame 上，
我需要加载多个 YouTube 视频。
一切都很好。
我正在使用 Windows XP、NetBeans 7.2、Java 1.7 9
这些天我再次尝试了该应用程序，但这次在 youtube 上我看到
“此视频当前不可用”。
我首先想到的可能是
我没有最新的 FlashPlayer ...
不用说我下载了所有东西......
该应用程序不再播放youtube视频
我什至再次重新安装了java和netbeans，但没有任何改变。
我还提到在 Firefox 上，这是我在我的 pc 上使用的浏览器
youtube 工作得很好。
知道这很烦人......有些事情还可以，也许......
我找到了一种把东西弄乱的方法......
所以现在，我可以在 javafx webview 中看到网页，但 youtube 视频仍然没有播放。 ..
上次我寻求帮助时，我没有输入代码……对此感到抱歉。
所以我做了另一个只有两个类的小项目来展示我做了什么
我没有在另一台电脑上对此进行测试，因为如果它发生过一次
，它可能会再次发生，并且由于事情无法自行解决，
我希望能够在它弹出时回答这个问题。
感谢 Jewelsea 和 Gregory 的关注
这是代码：
加载播放器的框架
package stackoverflow;
import java.awt.Dimension;
import java.awt.Point;
import java.util.ArrayList;
import java.util.List;
import javax.swing.JFrame;
public class PlayersFrame extends JFrame
{
public PlayersFrame()
{
// initialize jframe
setLayout(null);
setTitle(" YouTube on JFrame");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
CreatePlayersList();
}
// all the players have the same size
Dimension PlayerSize = new Dimension(300, 230);
private void CreatePlayersList()
{
/*
* create an instance of playerclass
* containing the location and the youtube embedded address
* for each of the four players
*/
Point NewPlayerLocation = null;
PlayerClass NewPlayer = null;
NewPlayerLocation = new Point(10, 10);
NewPlayer = new PlayerClass(NewPlayerLocation, PlayerSize, "http://www.youtube.com/embed/SvcDwPlaWgw?rel=0");
// add player1 class to the players list
Players.add(NewPlayer);
NewPlayerLocation = new Point(320, 10);
NewPlayer = new PlayerClass(NewPlayerLocation, PlayerSize, "http://www.youtube.com/embed/L0huXvTeVvU?rel=0");
// add player2 class to the players list
Players.add(NewPlayer);
NewPlayerLocation = new Point(10, 240);
NewPlayer = new PlayerClass(NewPlayerLocation, PlayerSize, "http://www.youtube.com/embed/rHcnsEoSK_c?rel=0");
// add player3 class to the players list
Players.add(NewPlayer);
NewPlayerLocation = new Point(320, 240);
NewPlayer = new PlayerClass(NewPlayerLocation, PlayerSize, "http://www.youtube.com/embed/vaXuK-RsT6E?rel=0");
// add player4 class to the players list
Players.add(NewPlayer);
// stand by
LoadPlayers();
}
// list of players data
List<PlayerClass> Players = new ArrayList<>();
/*
* a class to hold data about a player
*/
public class PlayerClass
{
public PlayerClass(Point playerLocation, Dimension playerSize, String youTubeAddress)
{
PlayerLocation = playerLocation;
PlayerSize = playerSize;
YouTubeAddress = youTubeAddress;
}
public Point PlayerLocation = null;
public Dimension PlayerSize = null;
public String YouTubeAddress = null;
}
/*
* in this swinginterop project i want to display youtube videos on a jframe
* with webview i get more that i ask for
* webview will display an entire web page
* so a web page is created on the fly containing a frame for the player
*/
private String GeneratePlayerPage(Dimension PlayerSize, String EmbeddedAddress)
{
String GeneratedPage = null;
GeneratedPage = "<html>\n";
GeneratedPage += "<body>\n";
GeneratedPage += "<iframe\n";
GeneratedPage += "style=\"position:absolute;\n";
GeneratedPage += "left:0px;top:0px;" +
"width:" + String.valueOf(PlayerSize.width) +
"px;height:" + String.valueOf(PlayerSize.height) + "px;\"\n";
GeneratedPage += "src=\"" + EmbeddedAddress + "\"" + "\n";
GeneratedPage += "frameborder=\"0\" allowfullscreen>\n";
GeneratedPage += "</iframe>\n";
GeneratedPage += "</body>\n";
GeneratedPage += "</html>";
return(GeneratedPage);
}
/*
* why synchronized ? ...
*
* each javafx object runs on it's own thread
* this means that, sooner or later
* you will have to deal with crossthreading issues
*
* in this project it does not throw an error
* but since the playersform will add controls on a locked procedure,
* and i don't use a single player on the jframe,
* some of the players will not appear on the frame.
*
* if only one player is loaded on the jframe
* then all this is not necessary.
*
* i don't know if the players are there but are not rendered
* or the players were just not loaded
*
* with this synchronized void a callback from the javafx object is handled
*/
public synchronized void OkPlayer()
{
try
{
/*
* a player was loaded
* delay before the next player
*/
Thread.sleep(10);
}
catch(Exception Ex)
{}
/*
* if the players list is empty than all the players have been loaded
* but you also get an error, so check the size ...
*/
if(Players.size() > 0)
{
LoadPlayers();
}
}
void LoadPlayers()
{
/*
* get the data from the first playerclass in the players list
* and create a new player
*/
PlayerClass TempPlayer = Players.get(0);
Dimension playerSize = TempPlayer.PlayerSize;
YouTubePlayer player = new YouTubePlayer(this, playerSize,
GeneratePlayerPage(playerSize, TempPlayer.YouTubeAddress));
add(player);
player.setLocation(TempPlayer.PlayerLocation);
player.setSize(TempPlayer.PlayerSize);
player.setVisible(true);
// remove the used playerclass from the players list
Players.remove(0);
}
}
和玩家
package stackoverflow;
import java.awt.Dimension;
import javafx.application.Platform;
import javafx.embed.swing.JFXPanel;
import javafx.scene.Scene;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.Pane;
import javafx.scene.web.WebEngine;
import javafx.scene.web.WebView;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import javax.swing.UnsupportedLookAndFeelException;
public final class YouTubePlayer extends JPanel
{
public YouTubePlayer(PlayersFrame playersFrame, Dimension PlayerSize, String YouTubeAddress)
{
remote = playersFrame;
init(PlayerSize, YouTubeAddress);
}
private static JFXPanel browserFxPanel;
private Pane browser;
public void init(Dimension playerSize, String youTubeAddress)
{
final Dimension PlayerSize = playerSize;
final String YouTubeAddress = youTubeAddress;
browserFxPanel = new JFXPanel();
browserFxPanel.setPreferredSize(new Dimension(PlayerSize.width, PlayerSize.height));
add(browserFxPanel);
Platform.runLater(new Runnable()
{
public void run()
{
// inside the player's thread
createScene(PlayerSize, YouTubeAddress);
}
});
}
/*
* the program will start on the javafx thread
* the main void is placed in the javafx component
*
* maybe there are other ways to launch the program
* but for this one it is good enough ... for now
*/
public static void main(String[] args)
{
SwingUtilities.invokeLater(new Runnable()
{
public void run()
{
try
{
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels())
{
// set windows look and feel
if ("Windows".equals(info.getName()))
{
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
}
catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException Ex)//ClassNotFoundException | InstantiationException | IllegalAccessException | javax.swing.UnsupportedLookAndFeelException ex)
{}
// create an instance of playersframe
PlayersFrame LoadPlayers = new PlayersFrame();
LoadPlayers.setSize(new Dimension(640, 520));
// make it visible
LoadPlayers.setVisible(true);
}
});
}
PlayersFrame remote = null;
private void createScene(Dimension PlayerSize, String YouTubeAddress)
{
browser = createBrowser(PlayerSize, YouTubeAddress);
browserFxPanel.setScene(new Scene(browser));
/*
* player loaded
* let playersform know that it can proceed
* with the next player, if there still is one
*/
remote.OkPlayer();
}
private Pane createBrowser(Dimension PlayerSize, String YouTubeAddress)
{
WebView view = new WebView();
view.setPrefSize(PlayerSize.width, PlayerSize.height);
final WebEngine eng = view.getEngine();
eng.loadContent(YouTubeAddress);
GridPane grid = new GridPane();
grid.getChildren().addAll(view);
return grid;
}
}
这就是它的样子
http://i.stack.imgur.com/UvhcJ.jpg
这就是“事情”
http://i.stack.imgur.com/lB4uY.jpg
最后一位玩家的行为与其他玩家相同
如果我使用 NetBeans 中的示例并粘贴 YouTube 链接
，我会得到相同的结果
我真的需要知道发生了什么
谢谢