一、前言
最近使用javaFx写了个简单的视频播放功能，可以实现打开本地视频播放。

二、实现
1.使用jdk8自带的javaFx包实现，首先定义一个类VideoPlayer。
代码如下：

import javafx.application.Application;
import javafx.application.Platform;
import javafx.beans.InvalidationListener;
import javafx.beans.property.Property;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.geometry.Rectangle2D;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.layout.StackPane;
import javafx.scene.media.Media;
import javafx.scene.media.MediaException;
import javafx.scene.media.MediaPlayer;
import javafx.scene.media.MediaView;
import javafx.stage.FileChooser;
import javafx.stage.Screen;
import javafx.stage.Stage;
import javafx.util.Duration;

import java.io.File;
import java.net.MalformedURLException;
import java.net.URI;
import java.net.URISyntaxException;
import java.nio.file.Paths;
import java.util.concurrent.atomic.AtomicBoolean;


public class VideoPlayer extends Application {
	Button play,full,openFile;
	MediaPlayer mediaPlayer;
	MediaView mediaView;

	public static void main(String[] args) {
		launch(args);
	}

	@Override
	public void start(Stage primaryStage) throws MalformedURLException, URISyntaxException {
		openFile=new Button();
		openFile.setText("打开文件");

		openFile.setTranslateX(-300.0);
		openFile.setTranslateY(340.0);
		// 将MediaView加入到布局容器
		StackPane root = new StackPane();
		// 创建场景
		Scene scene = new Scene(root, 1000, 800);
		root.getChildren().add(openFile);

		primaryStage.setScene(scene);
		primaryStage.show();
		openFile.setOnMouseClicked(o->{
			mediaView = new MediaView(mediaPlayer);
			openFile(primaryStage);
			// 加载播放图像
			Image image = new Image(new File("image/play.png").toURI().toString());
			ImageView imageView = new ImageView(image);
			imageView.setFitHeight(45); // 设置图标大小
			imageView.setFitWidth(45);
			imageView.setPreserveRatio(true);
			full=new Button();
			play=new Button();
			play.setBackground(null);
			play.setTranslateX(0.0);
			play.setTranslateY(340.0);
			play.setGraphic(imageView);
			play.setContentDisplay(ContentDisplay.GRAPHIC_ONLY);
			// 创建MediaPlayer对象
			mediaPlayer.setAutoPlay(false); // 设置自动播放
			// 创建MediaView对象
			mediaView.setFitWidth(990);
			mediaView.setFitHeight(600);
			mediaView.setSmooth(true);
			// 将MediaView加入到布局容器
			root.getChildren().add(mediaView);
			root.getChildren().add(play);
			root.getChildren().add(full);
			// 创建场景
			scene.setOnMouseEntered(m->{
				if (!primaryStage.isFullScreen()) {
					play.setVisible(true);
					full.setVisible(true);
				}
			});
			scene.setOnMouseExited(m->{
				if (!primaryStage.isFullScreen()) {
					play.setVisible(false);
					full.setVisible(false);
				}
			});
			// 创建进度条
			ProgressBar progressBar = new ProgressBar(0);
			progressBar.setStyle("-fx-height: 8;");
			progressBar.setStyle("-fx-padding: -1;");
			Slider timeSlider = new Slider(0,0,0);
			// 当媒体元数据加载完成后，获取总播放时长
			mediaPlayer.setOnReady(() -> {
				Duration totalDuration = mediaPlayer.getTotalDuration();
				timeSlider.setMax(totalDuration.toSeconds());
				progressBar.progressProperty().bind(timeSlider.valueProperty().divide(totalDuration.toSeconds()));
				System.out.println("总播放时长: " + totalDuration.toSeconds() + " 秒");
			});
			mediaPlayer.setOnPlaying(() -> {
				Platform.runLater(()->{
					if (timeSlider.isFocused()) {
						return;
					}
					timeSlider.setValue(mediaPlayer.getCurrentTime().toSeconds());
				});
			});
			timeSlider.setOnMouseReleased(e -> {
				// 当拖动结束时更新进度条
				timeSlider.setValue(mediaPlayer.getCurrentTime().toSeconds());
				if (timeSlider.getValue()>=timeSlider.getMax()) {
					play.setGraphic(imageView);
				}
			});
			.........
			

2.实现的打开文件功能。

private void openFile(Stage primaryStage) {
		FileChooser fileChooser = new FileChooser();
		fileChooser.setTitle("打开文件");
		fileChooser.getExtensionFilters().add(new FileChooser.ExtensionFilter("文件", "*.mp4","*.mp3","*.wav"));

		File file = fileChooser.showOpenDialog(null);

		if (file != null) {
			try {
				URI uri = Paths.get(file.getAbsolutePath()).toUri();
				Media media = new Media(uri.toString());
				if (mediaPlayer != null) {
					mediaPlayer.dispose();
				}
				mediaPlayer = new MediaPlayer(media);
				mediaView = new MediaView(mediaPlayer);

				String mediaTitle = "player - " + file.getName();
				//((Stage) mediaView.getScene().getWindow()).setTitle(mediaTitle);
				primaryStage.setTitle(mediaTitle);
			} catch (MediaException e) {
				Alert alert = new Alert(Alert.AlertType.ERROR);
				alert.setTitle("错误");
				alert.setHeaderText("无法打开文件");
				alert.setContentText("打开文件时发生错误。");
				alert.showAndWait();
			}
		}
	}

3.实现后的效果如下：


完整代码如下：
javaFX实现视频播放源码