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  • 如何从另一个FXML控制器（这些控制器不是嵌套控制器）获取一个Java FXML控制器中的数据？

如何从另一个FXML控制器（这些控制器不是嵌套控制器）获取一个Java FXML控制器中的数据？

java javafx-2 javafx

如何从另一个FXML控制器（这些控制器不是嵌套控制器）获取一个Java FXML控制器中的数据？,java,javafx-2,javafx,viewcontroller,fxml,Java,Javafx 2,Javafx,Viewcontroller,Fxml,我在一个FXML中有一个按钮，在另一个FXML中有两个文本字段。这两个FXML是独立的，我的意思是它们不是嵌套的。每当单击按钮时，我想在控制台/输出中打印文本（在两个文本字段中）。以下是fxmls及其控制器： Button.fxml <AnchorPane id="AnchorPane" prefHeight="200.0" prefWidth="320.0" xmlns:fx="http://javafx.com/fxml" fx:controller="textboxandbu

我在一个FXML中有一个按钮，在另一个FXML中有两个文本字段。这两个FXML是独立的，我的意思是它们不是嵌套的。每当单击按钮时，我想在控制台/输出中打印文本（在两个文本字段中）。以下是fxmls及其控制器：

Button.fxml

    <AnchorPane id="AnchorPane" prefHeight="200.0" prefWidth="320.0" xmlns:fx="http://javafx.com/fxml" fx:controller="textboxandbuttonbinding.ButtonController">
      <children>
         <Button fx:id="button" layoutX="126.0" layoutY="90.0" onAction="#handleButtonAction" text="Button" />
      </children>
    </AnchorPane>
Text.fxml

    <AnchorPane id="AnchorPane" prefHeight="400.0" prefWidth="600.0" xmlns:fx="http://javafx.com/fxml" fx:controller="textboxandbuttonbinding.Sample1111Controller">
       <children>
           <TextField fx:id="textField1" layoutX="186.0" layoutY="133.0" prefWidth="200.0" promptText="text 1" />
           <TextField fx:id="textField2" layoutX="186.0" layoutY="200.0" prefWidth="200.0" promptText="text2" />
       </children>
    </AnchorPane>
如何实现此功能？我已经考虑到这两个FXML作为两个不同的窗口同时加载。

将您的控制器转换为单例，然后使用setter/getter和另一个控制器，然后访问值

public class TextController implements Initializable {

    private TextController instance;

    private TextController() {};

    public static TextController getInstance() {
        if (TextController.instance == null) {
            synchronized (TextController.class) {
                if (TextController.instance == null) {
                    TextController.instance = new TextController();
                }
            }
        }
        return TextController.instance;
    }

    @FXML
    private TextField textField1;

    public TextField getTextField1() {
        return textField1;
    }
    @FXML
    private TextField textField2;

    public TextField getTextField2() {
        return textField2;
    }

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

    }    
}
然后在另一个控制器中，您可以执行以下操作：

TextController.getInstance().getTextField1();
等等。

将控制器转换为单例，然后使用setter/getter和另一个控制器，然后访问值

public class TextController implements Initializable {

    private TextController instance;

    private TextController() {};

    public static TextController getInstance() {
        if (TextController.instance == null) {
            synchronized (TextController.class) {
                if (TextController.instance == null) {
                    TextController.instance = new TextController();
                }
            }
        }
        return TextController.instance;
    }

    @FXML
    private TextField textField1;

    public TextField getTextField1() {
        return textField1;
    }
    @FXML
    private TextField textField2;

    public TextField getTextField2() {
        return textField2;
    }

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

    }    
}
然后在另一个控制器中，您可以执行以下操作：

TextController.getInstance().getTextField1();
等等。

将控制器转换为单例，然后使用setter/getter和另一个控制器，然后访问值

public class TextController implements Initializable {

    private TextController instance;

    private TextController() {};

    public static TextController getInstance() {
        if (TextController.instance == null) {
            synchronized (TextController.class) {
                if (TextController.instance == null) {
                    TextController.instance = new TextController();
                }
            }
        }
        return TextController.instance;
    }

    @FXML
    private TextField textField1;

    public TextField getTextField1() {
        return textField1;
    }
    @FXML
    private TextField textField2;

    public TextField getTextField2() {
        return textField2;
    }

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

    }    
}
然后在另一个控制器中，您可以执行以下操作：

TextController.getInstance().getTextField1();
等等。

将控制器转换为单例，然后使用setter/getter和另一个控制器，然后访问值

public class TextController implements Initializable {

    private TextController instance;

    private TextController() {};

    public static TextController getInstance() {
        if (TextController.instance == null) {
            synchronized (TextController.class) {
                if (TextController.instance == null) {
                    TextController.instance = new TextController();
                }
            }
        }
        return TextController.instance;
    }

    @FXML
    private TextField textField1;

    public TextField getTextField1() {
        return textField1;
    }
    @FXML
    private TextField textField2;

    public TextField getTextField2() {
        return textField2;
    }

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

    }    
}
然后在另一个控制器中，您可以执行以下操作：

TextController.getInstance().getTextField1();
等等。

通过对上述答案的一些修改（由SnakeDoc提供），我能够实现该功能

我创建了一个单独的Singleton类：

Singleton.java

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

        private TextField txtField1;
        private TextField txtField2;

        public TextField getTxtField2() {
            return txtField2;
        }

        public void setTxtField2(TextField txtField2) {
           this.txtField2 = txtField2;
        }

        public TextField getTxtField1() {
           return txtField1;
        }

       public void setTxtField1(TextField txtField1) {
           this.txtField1 = txtField1;
       }

    }
文本字段在initialize方法中设置

TextController.java

    public class ButtonController implements Initializable {

        @FXML
        private void handleButtonAction(ActionEvent event) {

        }

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

        }    
    }

    public class TextController implements Initializable {
        @FXML
        private TextField textField1;
        @FXML
        private TextField textField2;

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

        }    
    }

    public class TextController implements Initializable {

       @FXML
       private TextField textField1;

       @FXML
       private TextField textField2;

       @Override
       public void initialize(URL url, ResourceBundle rb) {
            Singleton.getInstance().setTxtField1(textField1);
            Singleton.getInstance().setTxtField2(textField2);
       }    
    }

    public class ButtonController implements Initializable {    

        @FXML
        private void handleButtonAction(ActionEvent event) {
            String str1 = Singleton.getInstance().getTxtField1().getText();
            String str2 = Singleton.getInstance().getTxtField2().getText();

            System.out.println(str1);
            System.out.println(str2);

        }

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

        }    
    }
getter方法在ButtonController.java类中调用

    public class ButtonController implements Initializable {

        @FXML
        private void handleButtonAction(ActionEvent event) {

        }

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

        }    
    }

    public class TextController implements Initializable {
        @FXML
        private TextField textField1;
        @FXML
        private TextField textField2;

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

        }    
    }

    public class TextController implements Initializable {

       @FXML
       private TextField textField1;

       @FXML
       private TextField textField2;

       @Override
       public void initialize(URL url, ResourceBundle rb) {
            Singleton.getInstance().setTxtField1(textField1);
            Singleton.getInstance().setTxtField2(textField2);
       }    
    }

    public class ButtonController implements Initializable {    

        @FXML
        private void handleButtonAction(ActionEvent event) {
            String str1 = Singleton.getInstance().getTxtField1().getText();
            String str2 = Singleton.getInstance().getTxtField2().getText();

            System.out.println(str1);
            System.out.println(str2);

        }

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

        }    
    }
ButtonController.java

    public class ButtonController implements Initializable {

        @FXML
        private void handleButtonAction(ActionEvent event) {

        }

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

        }    
    }

    public class TextController implements Initializable {
        @FXML
        private TextField textField1;
        @FXML
        private TextField textField2;

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

        }    
    }

    public class TextController implements Initializable {

       @FXML
       private TextField textField1;

       @FXML
       private TextField textField2;

       @Override
       public void initialize(URL url, ResourceBundle rb) {
            Singleton.getInstance().setTxtField1(textField1);
            Singleton.getInstance().setTxtField2(textField2);
       }    
    }

    public class ButtonController implements Initializable {    

        @FXML
        private void handleButtonAction(ActionEvent event) {
            String str1 = Singleton.getInstance().getTxtField1().getText();
            String str2 = Singleton.getInstance().getTxtField2().getText();

            System.out.println(str1);
            System.out.println(str2);

        }

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

        }    
    }
通过对上述答案的一些修改（通过SnakeDoc），我能够实现该功能

我创建了一个单独的Singleton类：

Singleton.java

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

        private TextField txtField1;
        private TextField txtField2;

        public TextField getTxtField2() {
            return txtField2;
        }

        public void setTxtField2(TextField txtField2) {
           this.txtField2 = txtField2;
        }

        public TextField getTxtField1() {
           return txtField1;
        }

       public void setTxtField1(TextField txtField1) {
           this.txtField1 = txtField1;
       }

    }
文本字段在initialize方法中设置

TextController.java

    public class ButtonController implements Initializable {

        @FXML
        private void handleButtonAction(ActionEvent event) {

        }

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

        }    
    }

    public class TextController implements Initializable {
        @FXML
        private TextField textField1;
        @FXML
        private TextField textField2;

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

        }    
    }

    public class TextController implements Initializable {

       @FXML
       private TextField textField1;

       @FXML
       private TextField textField2;

       @Override
       public void initialize(URL url, ResourceBundle rb) {
            Singleton.getInstance().setTxtField1(textField1);
            Singleton.getInstance().setTxtField2(textField2);
       }    
    }

    public class ButtonController implements Initializable {    

        @FXML
        private void handleButtonAction(ActionEvent event) {
            String str1 = Singleton.getInstance().getTxtField1().getText();
            String str2 = Singleton.getInstance().getTxtField2().getText();

            System.out.println(str1);
            System.out.println(str2);

        }

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

        }    
    }
getter方法在ButtonController.java类中调用

    public class ButtonController implements Initializable {

        @FXML
        private void handleButtonAction(ActionEvent event) {

        }

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

        }    
    }

    public class TextController implements Initializable {
        @FXML
        private TextField textField1;
        @FXML
        private TextField textField2;

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

        }    
    }

    public class TextController implements Initializable {

       @FXML
       private TextField textField1;

       @FXML
       private TextField textField2;

       @Override
       public void initialize(URL url, ResourceBundle rb) {
            Singleton.getInstance().setTxtField1(textField1);
            Singleton.getInstance().setTxtField2(textField2);
       }    
    }

    public class ButtonController implements Initializable {    

        @FXML
        private void handleButtonAction(ActionEvent event) {
            String str1 = Singleton.getInstance().getTxtField1().getText();
            String str2 = Singleton.getInstance().getTxtField2().getText();

            System.out.println(str1);
            System.out.println(str2);

        }

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

        }    
    }
ButtonController.java

    public class ButtonController implements Initializable {

        @FXML
        private void handleButtonAction(ActionEvent event) {

        }

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

        }    
    }

    public class TextController implements Initializable {
        @FXML
        private TextField textField1;
        @FXML
        private TextField textField2;

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

        }    
    }

    public class TextController implements Initializable {

       @FXML
       private TextField textField1;

       @FXML
       private TextField textField2;

       @Override
       public void initialize(URL url, ResourceBundle rb) {
            Singleton.getInstance().setTxtField1(textField1);
            Singleton.getInstance().setTxtField2(textField2);
       }    
    }

    public class ButtonController implements Initializable {    

        @FXML
        private void handleButtonAction(ActionEvent event) {
            String str1 = Singleton.getInstance().getTxtField1().getText();
            String str2 = Singleton.getInstance().getTxtField2().getText();

            System.out.println(str1);
            System.out.println(str2);

        }

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

        }    
    }
通过对上述答案的一些修改（通过SnakeDoc），我能够实现该功能

我创建了一个单独的Singleton类：

Singleton.java

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

        private TextField txtField1;
        private TextField txtField2;

        public TextField getTxtField2() {
            return txtField2;
        }

        public void setTxtField2(TextField txtField2) {
           this.txtField2 = txtField2;
        }

        public TextField getTxtField1() {
           return txtField1;
        }

       public void setTxtField1(TextField txtField1) {
           this.txtField1 = txtField1;
       }

    }
文本字段在initialize方法中设置

TextController.java

    public class ButtonController implements Initializable {

        @FXML
        private void handleButtonAction(ActionEvent event) {

        }

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

        }    
    }

    public class TextController implements Initializable {
        @FXML
        private TextField textField1;
        @FXML
        private TextField textField2;

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

        }    
    }

    public class TextController implements Initializable {

       @FXML
       private TextField textField1;

       @FXML
       private TextField textField2;

       @Override
       public void initialize(URL url, ResourceBundle rb) {
            Singleton.getInstance().setTxtField1(textField1);
            Singleton.getInstance().setTxtField2(textField2);
       }    
    }

    public class ButtonController implements Initializable {    

        @FXML
        private void handleButtonAction(ActionEvent event) {
            String str1 = Singleton.getInstance().getTxtField1().getText();
            String str2 = Singleton.getInstance().getTxtField2().getText();

            System.out.println(str1);
            System.out.println(str2);

        }

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

        }    
    }
getter方法在ButtonController.java类中调用

    public class ButtonController implements Initializable {

        @FXML
        private void handleButtonAction(ActionEvent event) {

        }

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

        }    
    }

    public class TextController implements Initializable {
        @FXML
        private TextField textField1;
        @FXML
        private TextField textField2;

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

        }    
    }

    public class TextController implements Initializable {

       @FXML
       private TextField textField1;

       @FXML
       private TextField textField2;

       @Override
       public void initialize(URL url, ResourceBundle rb) {
            Singleton.getInstance().setTxtField1(textField1);
            Singleton.getInstance().setTxtField2(textField2);
       }    
    }

    public class ButtonController implements Initializable {    

        @FXML
        private void handleButtonAction(ActionEvent event) {
            String str1 = Singleton.getInstance().getTxtField1().getText();
            String str2 = Singleton.getInstance().getTxtField2().getText();

            System.out.println(str1);
            System.out.println(str2);

        }

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

        }    
    }
ButtonController.java

    public class ButtonController implements Initializable {

        @FXML
        private void handleButtonAction(ActionEvent event) {

        }

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

        }    
    }

    public class TextController implements Initializable {
        @FXML
        private TextField textField1;
        @FXML
        private TextField textField2;

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

        }    
    }

    public class TextController implements Initializable {

       @FXML
       private TextField textField1;

       @FXML
       private TextField textField2;

       @Override
       public void initialize(URL url, ResourceBundle rb) {
            Singleton.getInstance().setTxtField1(textField1);
            Singleton.getInstance().setTxtField2(textField2);
       }    
    }

    public class ButtonController implements Initializable {    

        @FXML
        private void handleButtonAction(ActionEvent event) {
            String str1 = Singleton.getInstance().getTxtField1().getText();
            String str2 = Singleton.getInstance().getTxtField2().getText();

            System.out.println(str1);
            System.out.println(str2);

        }

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

        }    
    }
通过对上述答案的一些修改（通过SnakeDoc），我能够实现该功能

我创建了一个单独的Singleton类：

Singleton.java

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

        private TextField txtField1;
        private TextField txtField2;

        public TextField getTxtField2() {
            return txtField2;
        }

        public void setTxtField2(TextField txtField2) {
           this.txtField2 = txtField2;
        }

        public TextField getTxtField1() {
           return txtField1;
        }

       public void setTxtField1(TextField txtField1) {
           this.txtField1 = txtField1;
       }

    }
文本字段在initialize方法中设置

TextController.java

    public class ButtonController implements Initializable {

        @FXML
        private void handleButtonAction(ActionEvent event) {

        }

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

        }    
    }

    public class TextController implements Initializable {
        @FXML
        private TextField textField1;
        @FXML
        private TextField textField2;

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

        }    
    }

    public class TextController implements Initializable {

       @FXML
       private TextField textField1;

       @FXML
       private TextField textField2;

       @Override
       public void initialize(URL url, ResourceBundle rb) {
            Singleton.getInstance().setTxtField1(textField1);
            Singleton.getInstance().setTxtField2(textField2);
       }    
    }

    public class ButtonController implements Initializable {    

        @FXML
        private void handleButtonAction(ActionEvent event) {
            String str1 = Singleton.getInstance().getTxtField1().getText();
            String str2 = Singleton.getInstance().getTxtField2().getText();

            System.out.println(str1);
            System.out.println(str2);

        }

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

        }    
    }
getter方法在ButtonController.java类中调用

    public class ButtonController implements Initializable {

        @FXML
        private void handleButtonAction(ActionEvent event) {

        }

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

        }    
    }

    public class TextController implements Initializable {
        @FXML
        private TextField textField1;
        @FXML
        private TextField textField2;

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

        }    
    }

    public class TextController implements Initializable {

       @FXML
       private TextField textField1;

       @FXML
       private TextField textField2;

       @Override
       public void initialize(URL url, ResourceBundle rb) {
            Singleton.getInstance().setTxtField1(textField1);
            Singleton.getInstance().setTxtField2(textField2);
       }    
    }

    public class ButtonController implements Initializable {    

        @FXML
        private void handleButtonAction(ActionEvent event) {
            String str1 = Singleton.getInstance().getTxtField1().getText();
            String str2 = Singleton.getInstance().getTxtField2().getText();

            System.out.println(str1);
            System.out.println(str2);

        }

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

        }    
    }
ButtonController.java

    public class ButtonController implements Initializable {

        @FXML
        private void handleButtonAction(ActionEvent event) {

        }

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

        }    
    }

    public class TextController implements Initializable {
        @FXML
        private TextField textField1;
        @FXML
        private TextField textField2;

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

        }    
    }

    public class TextController implements Initializable {

       @FXML
       private TextField textField1;

       @FXML
       private TextField textField2;

       @Override
       public void initialize(URL url, ResourceBundle rb) {
            Singleton.getInstance().setTxtField1(textField1);
            Singleton.getInstance().setTxtField2(textField2);
       }    
    }

    public class ButtonController implements Initializable {    

        @FXML
        private void handleButtonAction(ActionEvent event) {
            String str1 = Singleton.getInstance().getTxtField1().getText();
            String str2 = Singleton.getInstance().getTxtField2().getText();

            System.out.println(str1);
            System.out.println(str2);

        }

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

        }    
    }
您可以使用此解决方案：或者此解决方案，甚至此解决方案。您提供的解决方案主要是将数据设置到另一个控制器。我想要的是从另一个FXML获取数据，特别是从TextField。我认为蛇医给出的解决方案应该有效，但我不确定为什么它不起作用。请帮助我，我完全被困在这里。您可以使用此解决方案：或者此解决方案，甚至此解决方案。您提供的解决方案主要是将数据设置到另一个控制器。我想要的是从另一个FXML获取数据，特别是从TextField。我认为蛇医给出的解决方案应该有效，但我不确定为什么它不起作用。请帮助我，我完全被困在这里。您可以使用此解决方案：或者此解决方案，甚至此解决方案。您提供的解决方案主要是将数据设置到另一个控制器。我想要的是从另一个FXML获取数据，特别是从TextField。我认为蛇医给出的解决方案应该有效，但我不确定为什么它不起作用。请帮助我，我完全被困在这里。您可以使用此解决方案：或者此解决方案，甚至此解决方案。您提供的解决方案主要是将数据设置到另一个控制器。我想要的是从另一个FXML获取数据，特别是从TextField。我认为蛇医给出的解决方案应该有效，但我不确定为什么它不起作用。请帮助我，我完全被困在这里了。我尝试过使用单例设计模式，但我不知道为什么它会抛出空指针异常来获取文本字段。下面是访问getter方法的代码：@FXML private void handleButtonAction（ActionEvent事件）{String str1=TextController.getInstance（）.getTextField1（）.getText（）；String str2=TextController.getInstance（）.getTextField2（）.getText（）；System.out.println（“text 1:：”+str1）；System.out.println（[text 1:：“+str2）；}您好，我尝试了Singleton的延迟初始化和早期初始化，但都不起作用。问题是TextController.getInstance（）返回NULL。实例似乎尚未创建。请帮助。嗨，SnakeDoc，它现在正在工作。代码中的问题是singleton实例没有setter方法。我已经创建了一个单独的singleton类，其中包含文本字段的getter和setter。我在TextController.j的initialize方法中设置setter方法ava.Thankswas不在办公室——是的，我忘了在我的示例代码中添加setter，我很忙！很高兴你能让它工作：）在这种情况下这很好，但是如果你想包含由同一个FXML文件创建的多个节点（它们都共享同一个控制器，因此无法正常工作），那么就不起作用了。JavaFX提供了很多机制来处理这种情况，而无需像这样重新构造设计。看到我在上发布的解决方案了吗？我已经尝试过使用singleton设计模式，但我不确定为什么它会抛出null指针异常来获取TextField。下面是访问getter方法的代码：@FXML private void handleButtonAction（ActionEvent事件）{String str1=TextControl