如何使用executeScript由JavaScript（桥）中的WebView调用（JavaFX的）

Question

我有这个类：

public Palco() { 
    super(); 
    initComponents(); 
    setExtendedState(java.awt.Frame.MAXIMIZED_BOTH); 

} 


private void initComponents() { 
    createScene(); 

    progressBar.setPreferredSize(new Dimension(150, 18)); 
    progressBar.setStringPainted(true); 

    JPanel topBar = new JPanel(new BorderLayout(5, 0)); 
    topBar.setBorder(BorderFactory.createEmptyBorder(3, 5, 3, 5)); 
    topBar.add(txtURL, BorderLayout.CENTER); 
    topBar.add(btnGo, BorderLayout.EAST); 


    statusBar.setBorder(BorderFactory.createEmptyBorder(3, 5, 3, 5)); 
    statusBar.add(lblStatus, BorderLayout.CENTER); 
    statusBar.add(progressBar, BorderLayout.EAST); 

    //panel.add(topBar, BorderLayout.NORTH); 
    panel.add(jfxPanel, BorderLayout.CENTER); 
    panel.add(statusBar, BorderLayout.SOUTH); 

    getContentPane().add(panel); 

    setTitle("My App"); 

    setPreferredSize(new Dimension(1024, 600)); 
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
    pack(); 

} 

private void createScene() { 

    Platform.runLater(new Runnable() { 

     public void run() { 

      WebView view = new WebView(); 
      engine = view.getEngine(); 
      engine.setJavaScriptEnabled(true); 


      engine.titleProperty().addListener(new ChangeListener<String>() { 

       public void changed(ObservableValue<? extends String> observable, String oldValue, final String newValue) { 
        SwingUtilities.invokeLater(new Runnable() { 
         String title = null; 
         public void run() { 
          if(newValue == null){ 
           title = "Carregando..."; 
          } else { 
           title = newValue; 
          } 
          Palco.this.setTitle(title); 
         } 
        }); 
       } 
      }); 

      engine.setOnStatusChanged(new EventHandler<WebEvent<String>>() { 

       public void handle(final WebEvent<String> event) { 
        SwingUtilities.invokeLater(new Runnable() { 

         public void run() { 
          // lblStatus.setText(event.getData()); 
         } 
        }); 
       } 
      }); 

      engine.locationProperty().addListener(new ChangeListener<String>() { 

       public void changed(ObservableValue<? extends String> ov, String oldValue, final String newValue) { 
        SwingUtilities.invokeLater(new Runnable() { 

         public void run() { 
          txtURL.setText(newValue); 
         } 
        }); 
       } 
      }); 

      engine.getLoadWorker().workDoneProperty().addListener(new ChangeListener<Number>() { 

       public void changed(ObservableValue<? extends Number> observableValue, Number oldValue, final Number newValue) { 

        SwingUtilities.invokeLater(new Runnable() { 

         public void run() { 
          if(newValue.intValue() < 100){ 
           statusBar.setVisible(true); 
          } else { 
           statusBar.setVisible(false); 

          } 
          progressBar.setValue(newValue.intValue()); 

         } 
        }); 
       } 
      }); 


      engine.documentProperty().addListener(new ChangeListener<Document>() { 
       public void changed(ObservableValue<? extends Document> prop, Document oldDoc, Document newDoc) { 
        MainTiles tiles = new MainTiles(engine); 
        tiles.ShowCategory(0); 


       } 
       }); 

      engine.getLoadWorker() 
        .exceptionProperty() 
        .addListener(new ChangeListener<Throwable>() { 

         public void changed(ObservableValue<? extends Throwable> o, Throwable old, final Throwable value) { 
          if (engine.getLoadWorker().getState() == FAILED) { 
           SwingUtilities.invokeLater(new Runnable() { 
            public void run() { 
             JOptionPane.showMessageDialog(
               panel, 
               (value != null) ? 
               engine.getLocation() + "\n" + value.getMessage() : 
               engine.getLocation() + "\nUnexpected error.", 
               "Loading error...", 
               JOptionPane.ERROR_MESSAGE); 
            } 
           }); 
          } 
         } 
        }); 

      engine.getLoadWorker().stateProperty().addListener(
        new ChangeListener<State>() { 
         @Override 
         public void changed(ObservableValue<? extends State> ov, 
          State oldState, State newState) { 
          JSObject jsobj = (JSObject) engine.executeScript("window"); 
          jsobj.setMember("java", new Bridge()); 


         } 

         } 
       ); 

      jfxPanel.setScene(new Scene(view)); 
     } 
    }); 
} 

public void loadURL(final String url) { 
    Platform.runLater(new Runnable() { 
     public void run() { 
      String tmp = toURL(url); 

      if (tmp == null) { 
       tmp = toURL("http://" + url); 
      } 

      engine.load(tmp); 
     } 
    }); 
} 

private static String toURL(String str) { 
    try { 
     return new URL(str).toExternalForm(); 
    } catch (MalformedURLException exception) { 
      return null; 
    } 
} 


public static void main(String[] args) { 
    SwingUtilities.invokeLater(new Runnable() { 

     public void run() { 
      Palco browser = new Palco(); 
      browser.setVisible(true); 
      String url = getClass().getResource("html/index.html").toExternalForm(); 
      browser.loadURL(url); 
     }  
    }); 
} 


public static void changeScene(){ 

} 

而我想在JavaScript（桥）回调<a onclick="java.link()">teste</a>执行命令executeScript，但我不知道怎么样通过web视图（WebView.getEngine）类桥：

public void link(){ 
    executeScript(engine, "document.getElementById('main').innerHTML = 'test';"); // engine is WebView 

} 

有谁知道这是否是可能的，或者怎么办？

对不起我的英语很糟糕= /，我是巴西人！ 感谢

Answer 1

你它可以通过构造函数传递给它，它可以共享一个普通的Java对象，即

public class Bridge{ 
    WebEngine engine; // add a new field 

    public Bridge(WebEngine engine){ 
     this.engine = engine; 
    } 
} 

// ... 

JSObject jsobj = (JSObject) engine.executeScript("window"); 
jsobj.setMember("java", new Bridge(engine)); // pass it here