百度了n多窗体通信，，，总是通过定义全局静态变量进行传值通信。。我个人不喜欢一个controller里写满所有的布局（这样显得臃肿，但是组件传值方便）。有没有另外的办法进行模块化并且可以传值呢。。

肯定是有的。。。

1.定义一个泛型类接收Controller对象与Stage对象

 

1 public class StageAndController
     
       { 2     private C controller; 3     private S stage; 4  5     public StageAndController(C controller, S stage) { 6         this.controller = controller; 7         this.stage = stage; 8     } 9     public StageAndController(C controller) {10         this.controller = controller;11     }12 13     public C getController() {14         return controller;15     }16 17     public void setController(C controller) {18         this.controller = controller;19     }20 21     public S getStage() {22         return stage;23     }24 25     public void setStage(S stage) {26         this.stage = stage;27     }28 }
     

 

这里之所以返回两个对象，，首先每个controller都对应一个打开的布局窗体，controller用来传值、赋值、初始化操作，stage本身需要调用show()才显示，，所以定义此类

 

2.封装 打开一个窗体或者动态加载一个Node

1 public static StageAndController addMenu(final Pane pane, final String fxmlName, Object controller) { 2         URL location = AddOperation.class.getResource("/fxml/" + fxmlName); 3         FXMLLoader fxmlLoader = new FXMLLoader(); 4         fxmlLoader.setLocation(location); 5         fxmlLoader.setBuilderFactory(new JavaFXBuilderFactory()); 6         try { 7             Node node = fxmlLoader.load();//返回Node对象  Node是布局顶级父类，再之上就是Object,所有此处可以加载一个布局添加到父级中 8             pane.getChildren().add(node);//Node添加到父级布局 9             controller = fxmlLoader.getController();//获取加载布局的Contrller对象10         } catch (IOException e) {11             e.printStackTrace();12         }13         return new StageAndController(controller);//返回controller实例14     }

//pane->需要添加node的父级Pane及Pane子类对象  fxmlName-->自定义的布局文件   Object-->需要实例化的Controller

这里我的用法是动态增加一排菜单栏，使用了到了controller传值作用，用法如下：

StageAndController controller = AddOperation.addMenu(operation, "read_item.fxml", ReadCardController.class);        readCardController = (ReadCardController) controller.getController();

向父级窗体暴露了一个Controller实例对象，就可以进行父窗体向子组件传值，初始化。

-------------------------------------------------------------------------------------------------------

1  public static StageAndController newDialog(String fxmlName, String title, Object controller) { 2         URL location = OpenDialog.class.getResource("/fxml/" + fxmlName); 3         FXMLLoader fxmlLoader = new FXMLLoader(); 4         fxmlLoader.setLocation(location); 5         fxmlLoader.setBuilderFactory(new JavaFXBuilderFactory()); 6         Stage stage = new Stage(); 7         try { 8             Pane dialogPane = fxmlLoader.load(); 9             stage.setScene(new Scene(dialogPane));10             stage.initModality(Modality.APPLICATION_MODAL);11             stage.initStyle(StageStyle.DECORATED);12             stage.setResizable(false);13             if (title != null) {14                 stage.setTitle(title);15             }16             controller = fxmlLoader.getController();17 18         } catch (IOException e) {19             e.printStackTrace();20         }21         return new StageAndController(controller, stage);

此处同理，加载的是一个窗体布局，同时设置模态化（本身未关闭，父级窗体不可点击）、动态标题，，，，，返回一个Controller与Stage对象，，，用法如下：

StageAndController stageAndController = OpenDialog.newDialog("connectDevice.fxml", "连接", ConnectDevice.class);        ConnectDevice controller = (ConnectDevice) stageAndController.getController();        Stage stage = (Stage) stageAndController.getStage();        controller.str= str;        controller.init();        stage.show();

窗体显示之前父窗体向子窗体传值或者做一些初始化。 这样模块化布局传值也变得简单好维护。

-------------------------------------------------------------------------------------------------------

嫌弃自带窗体风格太丑，，可以往下看。。

自定义Stage窗体布局（State设置透明时）：

public static StageAndController customDialog(String fxmlName, Object controller, Pane pane, String css) {        URL location = OpenDialog.class.getResource("/fxml/" + fxmlName);        FXMLLoader fxmlLoader = new FXMLLoader();        fxmlLoader.setLocation(location);        fxmlLoader.setBuilderFactory(new JavaFXBuilderFactory());        Stage stage = new Stage();        try {            pane = fxmlLoader.load();            Background background = new Background(new BackgroundFill(Paint.valueOf("#EFEFEF"), new CornerRadii(15), new Insets(0)));            pane.setBackground(background);            pane.setBorder(new Border(new BorderStroke(Color.valueOf("#0096C9"), BorderStrokeStyle.SOLID, new CornerRadii(15), new BorderWidths(2))));            Scene scene = new Scene(pane);            if (css != null) {                scene.getStylesheets().add(OpenDialog.class.getResource("/css/" + css).toExternalForm());            }            scene.setFill(Paint.valueOf("#FFFFFF00"));//设置场景透明            stage.initModality(Modality.APPLICATION_MODAL);            stage.initStyle(StageStyle.TRANSPARENT);            stage.setResizable(false);            stage.setScene(scene);            controller = fxmlLoader.getController();        } catch (IOException e) {            e.printStackTrace();        }        return new StageAndController(controller, stage);    }

用法差不多，加了一个自定义加载css样式，可以按需更改，，不过自定义时，，窗体头部拖动就不可用，下面贴出解决方案：

1 public class DragListener implements EventHandler
     
       { 2  3     private double xOffset = 0; 4     private double yOffset = 0; 5     private final Stage stage; 6  7     public DragListener(Stage stage) { 8         this.stage = stage; 9     }10 11     @Override12     public void handle(MouseEvent event) {13         event.consume();14         if (event.getEventType() == MouseEvent.MOUSE_PRESSED) {15             xOffset = event.getSceneX();16             yOffset = event.getSceneY();17         } else if (event.getEventType() == MouseEvent.MOUSE_DRAGGED) {18             stage.setX(event.getScreenX() - xOffset);19             if(event.getScreenY() - yOffset < 0) {20                 stage.setY(0);21             }else {22                 stage.setY(event.getScreenY() - yOffset);23             }24         }25     }26 27     public void enableDrag(Node node) {28         node.setOnMousePressed(this);29         node.setOnMouseDragged(this);30     }31 }
     

用法如下：

1   StageAndController stageAndController = OpenDialog.customDialog("connectDevice_cus.fxml",ConnectDevice.class,new Pane(),null);2         ConnectDevice controller = (ConnectDevice) stageAndController.getController();3         Stage stage = (Stage) stageAndController.getStage();4         new DragListener(stage).enableDrag(controller.title);//自定义窗口时设置拖动监听   此处controller.title是我自定义窗体标题栏的HBox对象5         controller.stage = stage;6         controller.init();7         stage.show();

这样就可以愉快的使用自定义弹窗了。。。。

-------------------------------------------------------------------------------------------------------

不喜勿喷！！！！ 欢迎进群学习交流（927465926）