Question

如何将参数传递给javafx中的辅助窗口？有没有办法与相应的控制器通信？

例如：用户从TableView中选择一个客户，并打开一个新窗口，显示客户的信息。

Stage newStage = new Stage();
try 
{
    AnchorPane page = (AnchorPane) FXMLLoader.load(HectorGestion.class.getResource(fxmlResource));
    Scene scene = new Scene(page);
    newStage.setScene(scene);
    newStage.setTitle(windowTitle);
    newStage.setResizable(isResizable);
    if(showRightAway) 
    {
        newStage.show();
    }
}

newStage将是新窗口。问题是，我找不到告诉控制器在哪里查找客户信息的方法（通过将id作为参数传递）。

有什么想法吗？

Answer 1

javafx.scene.Node类有一对方法 setUserData来（对象）和对象getUserData（）

您可以使用它将您的信息添加到节点。

因此，您可以调用page.setUserData（info）;

如果设置了信息，控制器可以检查。此外，如果需要，您可以使用ObjectProperty进行后向数据传输。

在此处观察文档： http://docs.oracle.com/javafx/2/api/javafx/fxml/doc-files/introduction_to_fxml.html 在短语“在第一个版本中，handleButtonAction（）被标记为@FXML以允许在控制器文档中定义的标记来调用它。在第二个示例中，按钮字段被注释以允许加载器设置其值。 initialize（）方法同样注释。“

因此，您需要将控制器与节点相关联，并将用户数据设置为节点。

Answer 2

我意识到这是一篇非常古老的文章，并且已经有了一些不错的答案，但是我想做一个简单的MCVE来演示一种这样的方法，并允许新的编码人员快速查看实际的概念。

在此示例中，我们将使用5个文件：

Main.java -仅用于启动应用程序并调用第一个控制器。
Controller1.java -第一个FXML布局的控制器。
Controller2.java -第二个FXML布局的控制器。
Layout1.fxml -第一个场景的FXML布局。
Layout2.fxml -第二个场景的FXML布局。

所有文件均完整列在本文的底部。

目标：演示从Controller1到Controller2的传递值，反之亦然。

程序流程：

第一个场景包含一个TextField，一个Button和一个Label。单击Button时，将加载并显示第二个窗口，包括在TextField中输入的文本。
在第二个场景中，还有一个TextField，一个Button和一个Label。 Label将在第一个场景中显示在TextField中输入的文本。
在第二个场景的TextField中输入文本并单击其Button之后，第一个场景的Label被更新以显示输入的文本。

这是一个非常简单的演示，可以肯定会进行一些改进，但是应该使概念非常清楚。

还对代码本身进行了注释，其中包含正在发生的事情以及如何发生的细节。

代码

Main.java：

import javafx.application.Application;
import javafx.stage.Stage;

public class Main extends Application {

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

    @Override
    public void start(Stage primaryStage) {

        // Create the first controller, which loads Layout1.fxml within its own constructor
        Controller1 controller1 = new Controller1();

        // Show the new stage
        controller1.showStage();

    }
}

Controller1.java：

import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.stage.Stage;

import java.io.IOException;

public class Controller1 {

    // Holds this controller's Stage
    private final Stage thisStage;

    // Define the nodes from the Layout1.fxml file. This allows them to be referenced within the controller
    @FXML
    private TextField txtToSecondController;
    @FXML
    private Button btnOpenLayout2;
    @FXML
    private Label lblFromController2;

    public Controller1() {

        // Create the new stage
        thisStage = new Stage();

        // Load the FXML file
        try {
            FXMLLoader loader = new FXMLLoader(getClass().getResource("Layout1.fxml"));

            // Set this class as the controller
            loader.setController(this);

            // Load the scene
            thisStage.setScene(new Scene(loader.load()));

            // Setup the window/stage
            thisStage.setTitle("Passing Controllers Example - Layout1");

        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    /**
     * Show the stage that was loaded in the constructor
     */
    public void showStage() {
        thisStage.showAndWait();
    }

    /**
     * The initialize() method allows you set setup your scene, adding actions, configuring nodes, etc.
     */
    @FXML
    private void initialize() {

        // Add an action for the "Open Layout2" button
        btnOpenLayout2.setOnAction(event -> openLayout2());
    }

    /**
     * Performs the action of loading and showing Layout2
     */
    private void openLayout2() {

        // Create the second controller, which loads its own FXML file. We pass a reference to this controller
        // using the keyword [this]; that allows the second controller to access the methods contained in here.
        Controller2 controller2 = new Controller2(this);

        // Show the new stage/window
        controller2.showStage();

    }

    /**
     * Returns the text entered into txtToSecondController. This allows other controllers/classes to view that data.
     */
    public String getEnteredText() {
        return txtToSecondController.getText();
    }

    /**
     * Allows other controllers to set the text of this layout's Label
     */
    public void setTextFromController2(String text) {
        lblFromController2.setText(text);
    }
}

Controller2.java：

import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.stage.Stage;

import java.io.IOException;

public class Controller2 {

    // Holds this controller's Stage
    private Stage thisStage;

    // Will hold a reference to the first controller, allowing us to access the methods found there.
    private final Controller1 controller1;

    // Add references to the controls in Layout2.fxml
    @FXML
    private Label lblFromController1;
    @FXML
    private TextField txtToFirstController;
    @FXML
    private Button btnSetLayout1Text;

    public Controller2(Controller1 controller1) {
        // We received the first controller, now let's make it usable throughout this controller.
        this.controller1 = controller1;

        // Create the new stage
        thisStage = new Stage();

        // Load the FXML file
        try {
            FXMLLoader loader = new FXMLLoader(getClass().getResource("Layout2.fxml"));

            // Set this class as the controller
            loader.setController(this);

            // Load the scene
            thisStage.setScene(new Scene(loader.load()));

            // Setup the window/stage
            thisStage.setTitle("Passing Controllers Example - Layout2");

        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    /**
     * Show the stage that was loaded in the constructor
     */
    public void showStage() {
        thisStage.showAndWait();
    }

    @FXML
    private void initialize() {

        // Set the label to whatever the text entered on Layout1 is
        lblFromController1.setText(controller1.getEnteredText());

        // Set the action for the button
        btnSetLayout1Text.setOnAction(event -> setTextOnLayout1());
    }

    /**
     * Calls the "setTextFromController2()" method on the first controller to update its Label
     */
    private void setTextOnLayout1() {
        controller1.setTextFromController2(txtToFirstController.getText());
    }

}

Layout1.fxml：

<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.geometry.Insets?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.layout.HBox?>
<?import javafx.scene.layout.VBox?>
<AnchorPane xmlns="http://javafx.com/javafx/9.0.1" xmlns:fx="http://javafx.com/fxml/1">
    <VBox alignment="CENTER" spacing="10.0">
        <padding>
            <Insets bottom="10.0" left="10.0" right="10.0" top="10.0"/>
        </padding>
        <Label style="-fx-font-weight: bold;" text="This is Layout1!"/>
        <HBox alignment="CENTER_LEFT" spacing="10.0">
            <Label text="Enter Text:"/>
            <TextField fx:id="txtToSecondController"/>
            <Button fx:id="btnOpenLayout2" mnemonicParsing="false" text="Open Layout2"/>
        </HBox>
        <VBox alignment="CENTER">
            <Label text="Text From Controller2:"/>
            <Label fx:id="lblFromController2" text="Nothing Yet!"/>
        </VBox>
    </VBox>
</AnchorPane>

Layout2.fxml：

<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.geometry.Insets?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.layout.HBox?>
<?import javafx.scene.layout.VBox?>
<AnchorPane xmlns="http://javafx.com/javafx/9.0.1" xmlns:fx="http://javafx.com/fxml/1">
    <VBox alignment="CENTER" spacing="10.0">
        <padding>
            <Insets bottom="10.0" left="10.0" right="10.0" top="10.0"/>
        </padding>
        <Label style="-fx-font-weight: bold;" text="Welcome to Layout 2!"/>
        <VBox alignment="CENTER">
            <Label text="Text From Controller1:"/>
            <Label fx:id="lblFromController1" text="Nothing Yet!"/>
        </VBox>
        <HBox alignment="CENTER_LEFT" spacing="10.0">
            <Label text="Enter Text:"/>
            <TextField fx:id="txtToFirstController"/>
            <Button fx:id="btnSetLayout1Text" mnemonicParsing="false" text="Set Text on Layout1"/>
        </HBox>
    </VBox>
</AnchorPane>

Answer 3

以下是通过命名空间将参数传递给fxml文档的示例。

Service

为名称空间变量<?xml version="1.0" encoding="UTF-8"?> <?import javafx.scene.control.Label?> <?import javafx.scene.layout.BorderPane?> <?import javafx.scene.layout.VBox?> <VBox xmlns="http://javafx.com/javafx/null" xmlns:fx="http://javafx.com/fxml/1"> <BorderPane> <center> <Label text="$labelText"/> </center> </BorderPane> </VBox>定义值External Text：

labelText

Answer 4

这个工作..

请记住，第一次打印传递值时，您将获得null，您可以在加载Windows后使用它，对于您要为任何其他组件编码的所有内容都是如此。

第一控制器

try {
                                Stage st = new Stage();
                                 FXMLLoader loader = new FXMLLoader(getClass().getResource("/com/inty360/free/form/MainOnline.fxml"));

                                Parent sceneMain = loader.load();

                                MainOnlineController controller = loader.<MainOnlineController>getController();
                                controller.initVariable(99L);

                                Scene scene = new Scene(sceneMain);
                                st.setScene(scene);
                                st.setMaximized(true);
                                st.setTitle("My App");
                                st.show();
                            } catch (IOException ex) {
                                Logger.getLogger(LoginController.class.getName()).log(Level.SEVERE, null, ex);
                            }

另一个控制器

public void initVariable(Long id_usuario){
        this.id_usuario = id_usuario;
        label_usuario_nombre.setText(id_usuario.toString());

    }

Answer 5

您必须创建一个上下文类。

public class Context {
    private final static Context instance = new Context();
    public static Context getInstance() {
        return instance;
    }

    private Connection con;
    public void setConnection(Connection con)
    {
        this.con=con;
    }
    public Connection getConnection() {
        return con;
    }

    private TabRoughController tabRough;
    public void setTabRough(TabRoughController tabRough) {
        this.tabRough=tabRough;
    }

    public TabRoughController getTabRough() {
        return tabRough;
    }
}

您必须使用

在初始化中设置控制器的实例

Context.getInstance().setTabRough(this);

您可以使用

在整个应用程序中使用它

TabRoughController cont=Context.getInstance().getTabRough();

现在您可以将参数传递给整个应用程序中的任何控制器。

Answer 6

以下是使用Guice注入的控制器的示例。

/**
 * Loads a FXML file and injects its controller from the given Guice {@code Provider}
 */
public abstract class GuiceFxmlLoader {

   public GuiceFxmlLoader(Stage stage, Provider<?> provider) {
      mStage = Objects.requireNonNull(stage);
      mProvider = Objects.requireNonNull(provider);
   }

   /**
    * @return the FXML file name
    */
   public abstract String getFileName();

   /**
    * Load FXML, set its controller with given {@code Provider}, and add it to {@code Stage}.
    */
   public void loadView() {
      try {
         FXMLLoader loader = new FXMLLoader(getClass().getClassLoader().getResource(getFileName()));
         loader.setControllerFactory(p -> mProvider.get());
         Node view = loader.load();
         setViewInStage(view);
      }
      catch (IOException ex) {
         LOGGER.error("Failed to load FXML: " + getFileName(), ex);
      }
   }

   private void setViewInStage(Node view) {
      BorderPane pane = (BorderPane)mStage.getScene().getRoot();
      pane.setCenter(view);
   }

   private static final Logger LOGGER = Logger.getLogger(GuiceFxmlLoader.class);

   private final Stage mStage;
   private final Provider<?> mProvider;
}

这是加载器的具体实现：

public class ConcreteViewLoader extends GuiceFxmlLoader {

   @Inject
   public ConcreteViewLoader(Stage stage, Provider<MyController> provider) {
      super(stage, provider);
   }

   @Override
   public String getFileName() {
      return "my_view.fxml";
   }
}

请注意，此示例将视图加载到BoarderPane的中心，该BoarderPane是舞台中场景的根。这与示例（我的具体用例的实现细节）无关，但决定将其保留，因为有些人可能觉得它很有用。

Answer 7

是的，您需要添加第一个控制器

    YourController controller = loader.getController();     
    controller.setclient(client);

然后在第二个中声明一个客户端，然后在控制器的底部：

   public void setclien(Client c) {
    this.client = c;
    }

Answer 8

我有一个简单得多的方法，使用initialize方法创建类的实例。我连续几天搜索了互联网，直到找到这种非常简单的方法。

声明您的类的实例：

//设置用于主类实例的变量

private static FXMLController instance;

声明您的课程，如下所示：

public class FXMLController implements Initializable {

在您的类中设置一个方法，如下所示：

public void mainController() {
    instance = this;
}

然后在initialize方法中调用该方法：

@Override // this method is ran when first showing the main window
public void initialize(URL location, ResourceBundle resources) {
     // initialize the instance of this class so it can be shared across controllers
     mainController();
}

Answer 9

您可以决定使用公共可观察列表来存储公共数据，或者只创建一个公共setter方法来存储数据并从相应的控制器中检索

Answer 10

为什么要回答一个6岁的问题？
与任何编程语言一起使用的最基本的概念之一是如何从一种（窗口，窗体或页面）导航到另一种。同样，在进行这种导航时，开发人员经常想从一个（窗口，表单或页面）传递数据并显示或使用传递的数据
虽然这里的大多数答案都提供了出色的范例，说明了如何完成此操作，但我们认为我们可以将其提高一两个等级
之所以说三个，是因为我们将在三个（窗口，窗体或页面）之间导航，并使用静态变量的概念在（窗口，窗体或页面）周围传递数据
在导航时，我们还将包含一些决策代码

public class Start extends Application {

    @Override
    public void start(Stage stage) throws Exception {
        // This is MAIN Class which runs first
        Parent root = FXMLLoader.load(getClass().getResource("start.fxml"));
        Scene scene = new Scene(root);
        stage.setScene(scene);
        stage.setResizable(false);// This sets the value for all stages
        stage.setTitle("Start Page"); 
        stage.show();
        stage.sizeToScene();
    }

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

启动控制器

public class startController implements Initializable {

@FXML Pane startPane,pageonePane;
@FXML Button btnPageOne;
@FXML TextField txtStartValue;
public Stage stage;
public static int intSETonStartController;
String strSETonStartController;

@FXML
private void toPageOne() throws IOException{

    strSETonStartController = txtStartValue.getText().trim();


        // yourString != null && yourString.trim().length() > 0
        // int L = testText.length();
        // if(L == 0){
        // System.out.println("LENGTH IS "+L);
        // return;
        // }
        /* if (testText.matches("[1-2]") && !testText.matches("^\\s*$")) 
           Second Match is regex for White Space NOT TESTED !
        */

        String testText = txtStartValue.getText().trim();
        // NOTICE IF YOU REMOVE THE * CHARACTER FROM "[1-2]*"
        // NO NEED TO CHECK LENGTH it also permited 12 or 11 as valid entry 
        // =================================================================
        if (testText.matches("[1-2]")) {
            intSETonStartController = Integer.parseInt(strSETonStartController);
        }else{
            txtStartValue.setText("Enter 1 OR 2");
            return;
        }

        System.out.println("You Entered = "+intSETonStartController);
        stage = (Stage)startPane.getScene().getWindow();// pane you are ON
        pageonePane = FXMLLoader.load(getClass().getResource("pageone.fxml"));// pane you are GOING TO
        Scene scene = new Scene(pageonePane);// pane you are GOING TO
        stage.setScene(scene);
        stage.setTitle("Page One"); 
        stage.show();
        stage.sizeToScene();
        stage.centerOnScreen();  
}

private void doGET(){
    // Why this testing ?
    // strSENTbackFROMPageoneController is null because it is set on Pageone
    // =====================================================================
    txtStartValue.setText(strSENTbackFROMPageoneController);
    if(intSETonStartController == 1){
      txtStartValue.setText(str);  
    }
    System.out.println("== doGET WAS RUN ==");
    if(txtStartValue.getText() == null){
       txtStartValue.setText("");   
    }
}

@Override
public void initialize(URL url, ResourceBundle rb) {
    // This Method runs every time startController is LOADED
     doGET();
}    
}

第一页控制器

public class PageoneController implements Initializable {

@FXML Pane startPane,pageonePane,pagetwoPane;
@FXML Button btnOne,btnTwo;
@FXML TextField txtPageOneValue;
public static String strSENTbackFROMPageoneController;
public Stage stage;

    @FXML
private void onBTNONE() throws IOException{

        stage = (Stage)pageonePane.getScene().getWindow();// pane you are ON
        pagetwoPane = FXMLLoader.load(getClass().getResource("pagetwo.fxml"));// pane you are GOING TO
        Scene scene = new Scene(pagetwoPane);// pane you are GOING TO
        stage.setScene(scene);
        stage.setTitle("Page Two"); 
        stage.show();
        stage.sizeToScene();
        stage.centerOnScreen();
}

@FXML
private void onBTNTWO() throws IOException{
    if(intSETonStartController == 2){
        Alert alert = new Alert(AlertType.CONFIRMATION);
        alert.setTitle("Alert");
        alert.setHeaderText("YES to change Text Sent Back");
        alert.setResizable(false);
        alert.setContentText("Select YES to send 'Alert YES Pressed' Text Back\n"
                + "\nSelect CANCEL send no Text Back\r");// NOTE this is a Carriage return\r
        ButtonType buttonTypeYes = new ButtonType("YES");
        ButtonType buttonTypeCancel = new ButtonType("CANCEL", ButtonData.CANCEL_CLOSE);

        alert.getButtonTypes().setAll(buttonTypeYes, buttonTypeCancel);

        Optional<ButtonType> result = alert.showAndWait();
        if (result.get() == buttonTypeYes){
            txtPageOneValue.setText("Alert YES Pressed");
        } else {
            System.out.println("canceled");
            txtPageOneValue.setText("");
            onBack();// Optional
        }
    }
}

@FXML
private void onBack() throws IOException{

    strSENTbackFROMPageoneController = txtPageOneValue.getText();
    System.out.println("Text Returned = "+strSENTbackFROMPageoneController);
    stage = (Stage)pageonePane.getScene().getWindow();
    startPane = FXMLLoader.load(getClass().getResource("start.fxml")); 
    Scene scene = new Scene(startPane);
    stage.setScene(scene);
    stage.setTitle("Start Page"); 
    stage.show();
    stage.sizeToScene();
    stage.centerOnScreen(); 
}

private void doTEST(){
    String fromSTART = String.valueOf(intSETonStartController);
    txtPageOneValue.setText("SENT  "+fromSTART);
    if(intSETonStartController == 1){
       btnOne.setVisible(true);
       btnTwo.setVisible(false);
       System.out.println("INTEGER Value Entered = "+intSETonStartController);  
    }else{
       btnOne.setVisible(false);
       btnTwo.setVisible(true);
       System.out.println("INTEGER Value Entered = "+intSETonStartController); 
    }  
}

@Override
public void initialize(URL url, ResourceBundle rb) {
    doTEST();
}    

}

第二页控制器

public class PagetwoController implements Initializable {

@FXML Pane startPane,pagetwoPane;
public Stage stage;
public static String str;

@FXML
private void toStart() throws IOException{

    str = "You ON Page Two";
    stage = (Stage)pagetwoPane.getScene().getWindow();// pane you are ON
    startPane = FXMLLoader.load(getClass().getResource("start.fxml"));// pane you are GOING TO
    Scene scene = new Scene(startPane);// pane you are GOING TO
    stage.setScene(scene);
    stage.setTitle("Start Page"); 
    stage.show();
    stage.sizeToScene();
    stage.centerOnScreen();  
}

@Override
public void initialize(URL url, ResourceBundle rb) {

}    

}

下面是所有FXML文件

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.control.Button?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.text.Font?>

<AnchorPane id="AnchorPane" fx:id="pagetwoPane" prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/8.0.60" xmlns:fx="http://javafx.com/fxml/1" fx:controller="atwopage.PagetwoController">
   <children>
      <Button layoutX="227.0" layoutY="62.0" mnemonicParsing="false" onAction="#toStart" text="To Start Page">
         <font>
            <Font name="System Bold" size="18.0" />
         </font>
      </Button>
   </children>
</AnchorPane>

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.control.Button?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.control.TextField?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.text.Font?>

<AnchorPane id="AnchorPane" fx:id="startPane" prefHeight="200.0" prefWidth="400.0" xmlns="http://javafx.com/javafx/8.0.60" xmlns:fx="http://javafx.com/fxml/1" fx:controller="atwopage.startController">
   <children>
      <Label focusTraversable="false" layoutX="115.0" layoutY="47.0" text="This is the Start Pane">
         <font>
            <Font size="18.0" />
         </font>
      </Label>
      <Button fx:id="btnPageOne" focusTraversable="false" layoutX="137.0" layoutY="100.0" mnemonicParsing="false" onAction="#toPageOne" text="To Page One">
         <font>
            <Font size="18.0" />
         </font>
      </Button>
      <Label focusTraversable="false" layoutX="26.0" layoutY="150.0" text="Enter 1 OR 2">
         <font>
            <Font size="18.0" />
         </font>
      </Label>
      <TextField fx:id="txtStartValue" layoutX="137.0" layoutY="148.0" prefHeight="28.0" prefWidth="150.0" />
   </children>
</AnchorPane>

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.control.Button?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.control.TextField?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.text.Font?>

<AnchorPane id="AnchorPane" fx:id="pageonePane" prefHeight="200.0" prefWidth="400.0" xmlns="http://javafx.com/javafx/8.0.60" xmlns:fx="http://javafx.com/fxml/1" fx:controller="atwopage.PageoneController">
   <children>
      <Label focusTraversable="false" layoutX="111.0" layoutY="35.0" text="This is Page One Pane">
         <font>
            <Font size="18.0" />
         </font>
      </Label>
      <Button focusTraversable="false" layoutX="167.0" layoutY="97.0" mnemonicParsing="false" onAction="#onBack" text="BACK">
         <font>
            <Font size="18.0" />
         </font></Button>
      <Button fx:id="btnOne" focusTraversable="false" layoutX="19.0" layoutY="97.0" mnemonicParsing="false" onAction="#onBTNONE" text="Button One" visible="false">
         <font>
            <Font size="18.0" />
         </font>
      </Button>
      <Button fx:id="btnTwo" focusTraversable="false" layoutX="267.0" layoutY="97.0" mnemonicParsing="false" onAction="#onBTNTWO" text="Button Two">
         <font>
            <Font size="18.0" />
         </font>
      </Button>
      <Label focusTraversable="false" layoutX="19.0" layoutY="152.0" text="Send Anything BACK">
         <font>
            <Font size="18.0" />
         </font>
      </Label>
      <TextField fx:id="txtPageOneValue" layoutX="195.0" layoutY="150.0" prefHeight="28.0" prefWidth="150.0" />
   </children>
</AnchorPane>

传递参数JavaFX FXML

10 个答案: