在javafx中集成

2026年 5月 20日下午3:55

## 简介
javafx中，使用jna调用dll，利用java主窗口的hwnd创建播放视图。
x,y,w,h 为相对于java主窗口的相对位置。

## 1 pom.xml中添加依赖
```
<dependency>
    <groupId>net.java.dev.jna</groupId>
    <artifactId>jna-platform</artifactId>
    <version>5.9.0</version>
</dependency>
```

## 2.创建类 cn.nodemedia.nodeplayer
```
package cn.nodemedia.nodeplayer;

import com.sun.jna.Callback;
import com.sun.jna.Native;
import com.sun.jna.Pointer;
import com.sun.jna.win32.StdCallLibrary;

public interface NodePlayer extends StdCallLibrary {
    NodePlayer INSTANCE = Native.load("libNodeMediaClient.dll", NodePlayer.class);

interface onEventCallback extends Callback {
        void invoke(Pointer userdata, int code, String message);
    }

long NodePlayer_new(String domain, String license);

void NodePlayer_free(long ctx);

void NodePlayer_setEventCallback(long ctx, onEventCallback callback, Pointer userdata);

void NodePlayer_setLogLevel(long ctx, int logLevel);

void NodePlayer_setAudioEnable(long ctx, boolean enable);

void NodePlayer_setVideoEnable(long ctx, boolean enable);

void NodePlayer_setScaleMode(long ctx, int scaleMode);

void NodePlayer_setBufferTime(long ctx, int bufferTime);

void NodePlayer_setHwaccelEnable(long ctx, boolean enable);

void NodePlayer_setCryptoKey(long ctx, String cryptoKey);

void NodePlayer_setVolume(long ctx, float volume);

int NodePlayer_attachView(long ctx, Pointer hwnd);

int NodePlayer_attachViewEx(long ctx, Pointer hwnd, int x, int y, int w,int h);

int NodePlayer_detachView(long ctx);

int NodePlayer_start(long ctx, String url);

int NodePlayer_stop(long ctx);

int NodePlayer_getVersion(long ctx);

}
```

## 3.在项目中使用
```
package cn.nodemedia.nodeplayer;

import com.sun.jna.platform.win32.User32;
import com.sun.jna.platform.win32.WinDef;

import javafx.application.Application;
import javafx.application.Platform;
import javafx.event.EventHandler;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.HBox;
import javafx.scene.layout.Pane;
import javafx.stage.Stage;
import javafx.stage.WindowEvent;

public class HelloApplication extends Application {
    private static final String STAGE_TITLE = "NodePlayer java demo";
    private long ctx = 0;
    private boolean start = false;
    private final NodePlayer np = NodePlayer.INSTANCE;
    private String domain = "";
    private String license = "";

@Override
    public void start(Stage primaryStage) {
        primaryStage.setTitle(STAGE_TITLE);
        primaryStage.show();

//Creating a GridPane container
        GridPane grid = new GridPane();
        grid.setPadding(new Insets(10, 10, 10, 10));
        grid.setVgap(5);
        grid.setHgap(5);
//Defining the url text field
        TextField url = new TextField();
        url.setText("rtmp://192.168.0.2/live/bbb");
        url.setPromptText("Enter a live streaming url.");
        url.setPrefColumnCount(50);

GridPane.setConstraints(url, 0, 0);
        grid.getChildren().add(url);

//Defining the start button
        Button submit = new Button("Start");
        GridPane.setConstraints(submit, 1, 0);
        grid.getChildren().add(submit);

submit.setOnAction(event -> {
            if (start) {
                np.NodePlayer_stop(ctx);
                submit.setText("Start");
            } else {
                np.NodePlayer_start(ctx, url.getText());
                submit.setText("Stop");
            }
            start = !start;
        });

WinDef.HWND hwnd = User32.INSTANCE.FindWindow(null, STAGE_TITLE);
        ctx = np.NodePlayer_new(domain, license);
        np.NodePlayer_setScaleMode(ctx, 1);
        np.NodePlayer_attachViewEx(ctx, hwnd.getPointer(), 10, 40, 780, 550);
        np.NodePlayer_setHwaccelEnable(ctx, true);
        np.NodePlayer_setEventCallback(ctx, (userdata, code, message) -> {
            System.out.printf("on EventCallback code=%d message=%s\n", code, message);
        }, null);

primaryStage.setScene(new Scene(grid, 800, 600));
        primaryStage.setOnCloseRequest(new EventHandler<>() {
            @Override
            public void handle(WindowEvent windowEvent) {
                Platform.exit();
                System.exit(0);
            }
        });
    }

@Override
    public void stop() throws Exception {
        super.stop();
        np.NodePlayer_free(ctx);
    }

public static void main(String[] args) {
        launch();
    }
}
```
## 准备dll
将开发包中的 libNodeMediaClient.dll 放在项目根目录下

## 运行效果
![](https://www.nodemedia.cn/doc/server/../Public/Uploads/2022-01-14/61e17ab48adc2.jpg)

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在javafx中集成