我的可执行jar不起作用

Question

我在“ eclipse”中使用javafx的项目中整夜都在工作。 它运行得非常好，所以我按下了“导出以获取可运行的jar文件，当我得到它时，它只是无法正常工作，仍然无法正常工作。我想问题出在主要方法中，我将在此处发布它。任何帮助会很棒。

package recetas;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.prefs.Preferences;

import javafx.application.Application;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.fxml.FXMLLoader;
import javafx.scene.Scene;
import javafx.scene.control.Alert;
import javafx.scene.control.Alert.AlertType;
import javafx.scene.image.Image;
import javafx.scene.layout.AnchorPane;
import javafx.scene.layout.HBox;
import javafx.stage.Modality;
import javafx.stage.Stage;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;

import recetas.model.Receta;
import recetas.model.RecetasListWrapper;
import recetas.view.Controlador;
import recetas.view.ControladorEditar;
import recetas.view.VerControlador;



public class MainRecetas extends Application {
    private Stage primaryStage;
    private ObservableList<Receta> recetaData = FXCollections
            .observableArrayList();

    public MainRecetas() {
        recetaData.add(new Receta("Arroz tres delicias"));
        recetaData.add(new Receta("Pollo al horno"));
        recetaData.add(new Receta("Bizcocho de chocolate"));
        recetaData.add(new Receta("Pizza barbacoa"));
        recetaData.add(new Receta("Sopa de pescado"));
        recetaData.add(new Receta("Macarrones a la bolognesa"));
        recetaData.add(new Receta("Pechuga con patatas fritas"));
        recetaData.add(new Receta("Macedonia"));
        recetaData.add(new Receta("Fresas con chocolate"));
        recetaData.get(1).setVal(1);
        recetaData.get(1).setPlato("Plato");
        recetaData.get(1).setDif("Facil");
        recetaData.get(2).setDif("Dificil");
    }

    public ObservableList<HBox> getCajasList() {
        ObservableList<HBox> res = FXCollections.observableArrayList();
        for (int i = 0; i < recetaData.size(); i++)
            res.add(recetaData.get(i).getCaja());
        return res;
    }

    @Override
    public void start(Stage primaryStage) {
        this.primaryStage = primaryStage;
        this.primaryStage.setTitle("Mis recetillas");
        this.primaryStage.getIcons().add(new Image("@../../icono.png"));
        showPersonOverview();
    }

    public void showPersonOverview() {
        Controlador controller = null;
        try {
            FXMLLoader loader = new FXMLLoader();
            loader.setLocation(MainRecetas.class.getResource("view/Vista.fxml"));
            AnchorPane personOverview = (AnchorPane) loader.load();
            Scene scene = new Scene(personOverview);
            primaryStage.setScene(scene);
            controller = loader.getController();
            controller.setMainRecetas(this);
            primaryStage.show();
        } catch (IOException e) {
            e.printStackTrace();
        }
        File file = getFilePath();
        if (file != null){
            CargarRecetas(file);
            controller.setMainRecetas(this);
        }
    }

    public boolean editar(Receta r) {
        try {
            FXMLLoader loader = new FXMLLoader();
            loader.setLocation(MainRecetas.class
                    .getResource("view/VentanaEditar.fxml"));
            AnchorPane editar = (AnchorPane) loader.load();
            Stage dialog = new Stage();
            dialog.setTitle("Editar receta: " + r.getNombre());
            dialog.initModality(Modality.WINDOW_MODAL);
            dialog.initOwner(primaryStage);
            Scene scene = new Scene(editar);
            dialog.setScene(scene);
            ControladorEditar controller = loader.getController();
            controller.setDialogStage(dialog);
            controller.setReceta(r);
            dialog.showAndWait();
            return controller.getOK();
        } catch (IOException e) {
            e.printStackTrace();
            return false;
        }
    }

    public boolean nuevo() {
        try {
            FXMLLoader loader = new FXMLLoader();
            loader.setLocation(MainRecetas.class
                    .getResource("view/VentanaEditar.fxml"));
            AnchorPane editar = (AnchorPane) loader.load();
            Stage dialog = new Stage();
            Receta r = new Receta(null);
            dialog.setTitle("Nueva receta");
            dialog.initModality(Modality.WINDOW_MODAL);
            dialog.initOwner(primaryStage);
            Scene scene = new Scene(editar);
            dialog.setScene(scene);
            ControladorEditar controller = loader.getController();
            controller.setDialogStage(dialog);
            controller.setReceta(r);
            dialog.showAndWait();
            boolean ok = controller.getOK();
            if (ok)
                recetaData.add(0, r);
            return ok;
        } catch (IOException e) {
            e.printStackTrace();
            return false;
        }
    }

    public void ver(Receta r) {
        try {
            FXMLLoader loader = new FXMLLoader();
            loader.setLocation(MainRecetas.class
                    .getResource("view/VerReceta.fxml"));
            AnchorPane editar = (AnchorPane) loader.load();
            Stage dialog = new Stage();
            dialog.setTitle(r.getNombre());
            dialog.initModality(Modality.WINDOW_MODAL);
            dialog.initOwner(primaryStage);
            Scene scene = new Scene(editar);
            dialog.setScene(scene);
            VerControlador controller = loader.getController();
            controller.setReceta(r);
            dialog.showAndWait();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public void ayuda() {
        try {
            FXMLLoader loader = new FXMLLoader();
            loader.setLocation(MainRecetas.class
                    .getResource("view/Ayuda.fxml"));
            AnchorPane editar = (AnchorPane) loader.load();
            Stage dialog = new Stage();
            dialog.setTitle("Ayuda");
            dialog.initModality(Modality.WINDOW_MODAL);
            dialog.initOwner(primaryStage);
            Scene scene = new Scene(editar);
            dialog.setScene(scene);
            dialog.showAndWait();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public Stage getPrimaryStage() {
        return primaryStage;
    }

    public ObservableList<Receta> getRecetaData() {
        return recetaData;
    }

    public void eliminar(int i) {
        recetaData.remove(i);
    }

    public void setFilePath(File file) {
        Preferences prefs = Preferences.userNodeForPackage(MainRecetas.class);
        if (file != null) {
            prefs.put("filePath", file.getPath());

            primaryStage.setTitle("Mis recetillas - " + file.getName());
        } else {
            prefs.remove("filePath");

            primaryStage.setTitle("Mis recetillas");
        }
    }

    public File getFilePath() {
        Preferences prefs = Preferences.userNodeForPackage(MainRecetas.class);
        String filePath = prefs.get("filePath", null);
        if (filePath != null) {
            return new File(filePath);
        } else {
            return null;
        }
    }

    public void CargarRecetas(File file) {
        try {
            JAXBContext context = JAXBContext
                    .newInstance(RecetasListWrapper.class);
            Unmarshaller um = context.createUnmarshaller();

            RecetasListWrapper wrapper = (RecetasListWrapper) um
                    .unmarshal(file);

            recetaData.clear();
            try{ recetaData.addAll(wrapper.getRecetas());}
            catch(NullPointerException e){}

            setFilePath(file);

        } catch (JAXBException e) {
            Alert alert = new Alert(AlertType.ERROR);
            alert.setTitle("Error");
            alert.setHeaderText("No se pudo cargar la información del archivo:\n"
                    + file.getPath());
            alert.showAndWait();
        }
    }

    public void guardarRecetas(File file) {
        try {
            JAXBContext context = JAXBContext
                    .newInstance(RecetasListWrapper.class);
            Marshaller m = context.createMarshaller();
            m.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);

            RecetasListWrapper wrapper = new RecetasListWrapper();
            wrapper.setRecetas(recetaData);

            m.marshal(wrapper, file);

            setFilePath(file);
        } catch (Exception e) { 
            Alert alert = new Alert(AlertType.ERROR);
            alert.setTitle("Error");
            alert.setHeaderText("No se pudo guardar la información en el archivo:\n"
                    + file.getPath());
            alert.showAndWait();
        }
    }

    public List<Receta> buscarDestacadas() {
        List<Receta> l = new ArrayList<Receta>();
        for (int i = 0; i < recetaData.size(); i++) {
            Receta r = recetaData.get(i);
            if (r.getVal() == 5)
                l.add(r);
        }
        return l;
    }

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

Answer 1

由于注释中描述的事件以及您提供的代码，我有两种可能的解决方案。

1. 根据您提供的代码，没有launch()方法。 这意味着一旦启动，该程序将无处可去，并且应该会产生错误，因为没有方法launch() 。
2. 您可能已将其导出为可执行文件以外的其他文件。 也许您已将其导出为jar file而不是runnable jar file 。 如果这样做，您要做的就是更改导出方式。

Answer 2

我也遇到了同样的问题，但是我在start方法中初始化了照片（仅在JavaFX中使用），并且我的问题已解决，并且jar与在IDE中工作相同（在我的情况下为Eclipse）。

@Override
public void start(Stage stage) {
  // set all photos in this function
}

在Eclipse IDE中注意：

1. 在已安装的JRE中设置JDK而不是JRE
2. 从File-> New-> Project-> JavaFX-> JavaFX项目创建特殊的JavaFX项目
3. 通过“ build.fxbuild”构建项目，然后，像普通的Java程序一样导出
4. 在启动方法中设置所有图标和照片，切勿在其他功能中定义图标或任何照片。