帶有OpenCV和Javafx的jar文件

Question

我制作了一個包括多維數據集檢測系統的rubiks多維數據集應用程序，隨着我接近完成項目的工作，我想制作一個JAR文件。 運行JAR文件時出現錯誤，它確實很爛，因為我只能在IntelliJ（IDE）中運行項目。 我遇到兩個問題：1）我無法正確連接openCV的JAR 2）加載FXML文件時遇到問題（假設在嘗試加載openCV時沒有崩潰，這會發生。

對於情況1，下面是代碼和錯誤：

static {
   // try {
        System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
 //   } catch (UnsatisfiedLinkError e) {
   //     System.err.println("Could not find OpenCV Library!");
 //   }
}

和錯誤消息：

Exception in thread "JavaFX Application Thread" Exception in thread "main" java.lang.UnsatisfiedLinkError: no opencv_java342 in java.library.path:

現在，如果我刪除try catch注釋，則會出現此錯誤：

static {
    try {
        System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
    } catch (UnsatisfiedLinkError e) {
       System.err.println("Could not find OpenCV Library!");
    }
}

@Override
public void start(Stage primaryStage) throws Exception {
    //Loader
    FXMLLoader loader = new FXMLLoader(main.class.getResource("FXML_layouts\\MainScreen.fxml"));

    Scene scene = new Scene(loader.load());
    ((mainController)loader.getController()).setStage(primaryStage);

    primaryStage.setScene(scene);
    primaryStage.show();
}

錯誤：

    Could not find OpenCV Library!
Exception in Application start method
java.lang.reflect.InvocationTargetException
....
Caused by: java.lang.IllegalStateException: Location is not set.

這是我的文件結構：

這是我的工件配置：

Answer 1

只需執行以下步驟：

1. 將opencv_java342.dll放在一個文件夾中， dll_libs在驅動器中稱為dll_libs ，例如C:\\dll_libs
2. 然后轉到環境變量->編輯路徑->放置C:\\dll_libs >應用->確定
3. 重新啟動IDE

或：只需將opencv_java342.dll文件放在C:\\Windows\\System32文件夾中

它是:)

更新（針對第二個問題）：如果要將可執行程序包交給其他人來運行程序，則有兩種方法：

1. 讓他們手動創建環境，就像回答問題一樣。
2. 以編程方式完成此工作，只需在您的代碼內編寫一個函數即可在程序啟動時設置.dd環境變量，然后加載lib。

如果您選擇第二個，這里我將給出一個示例代碼以供參考：

public static void loadOpenCVLib() throws Exception {
    File file = new File(OpenCVUtil.class.getProtectionDomain().getCodeSource().getLocation().getPath());
    File opencv_libs = new File("oc_lib"); // this path is where is the lib going to copy to
    String model = System.getProperty("sun.arch.data.model");
    String localLibPath; // this is the path inside your program resource
    if (model.equals("64")) {
        localLibPath = "oc_lib/64bit";
    } else {
        localLibPath = "oc_lib/x86";
    }
    if (file.isFile()) { // when run from jar
        JarFile jar = new JarFile(file);
        if (!opencv_libs.exists() || !opencv_libs.isDirectory()) {
            try {
                JarUtils.copyResourcesToDirectory(jar, localLibPath, opencv_libs.getAbsolutePath());
            } catch (Exception e) {
                throw new IOException("Failed to create load opencv libs!!");
            }
        } else {
            String[] list = opencv_libs.list();
            if (list != null && list.length != 2) {
                try {
                    JarUtils.copyResourcesToDirectory(jar, localLibPath, opencv_libs.getAbsolutePath());
                } catch (Exception e) {
                    throw new IOException("Failed to create load opencv libs!!");
                }
            }
        }
    } else { // when run from IDE
        File libPath = new File(OpenCVUtil.class.getResource("/"+localLibPath).getFile());
        if (!opencv_libs.exists() || !opencv_libs.isDirectory()) {
            boolean isDone = opencv_libs.mkdir();
            if (!isDone && !opencv_libs.exists()) {
                throw new IOException("Failed to create load opencv libs!!");
            }
            try {
                FileUtils.copyDirectory(libPath, opencv_libs);
            } catch (IOException e) {
                throw new IOException("Failed to create load opencv libs!!");
            }
        } else {
            String[] list1 = opencv_libs.list();
            String[] list2 = libPath.list();
            boolean contentEquals = list1 != null && list2 != null && list1.length == list2.length;
            if (contentEquals) {
                try {
                    FileUtils.copyDirectory(libPath, opencv_libs);
                } catch (IOException e) {
                    throw new IOException("Failed to create load opencv libs!!");
                }
            }
        }
    }
    System.setProperty("java.library.path", opencv_libs.getAbsolutePath());
    Field sys_paths = ClassLoader.class.getDeclaredField("sys_paths");
    sys_paths.setAccessible(true);
    sys_paths.set(null, null);
    System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
    // it is for the ffmpeg name
    String[] list = opencv_libs.list();
    assert list != null;
    String ffmpeg_dll_file_name = null;
    for (String s : list) {
        if (s.contains("ffmpeg")) {
            ffmpeg_dll_file_name = s.substring(0, s.indexOf("."));
        }
    }
    System.loadLibrary(ffmpeg_dll_file_name);
}

希望能對您有所幫助！！