问题
I have one button in one FXML and two text fields in another FXML. These two FXMLs are independent, I mean they are not nested. I want to print the text (which are in the two text fields) in the console/output whenever there is a click in the button. Below are the fxmls and their controllers:
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>
ButtonController.java
public class ButtonController implements Initializable {
@FXML
private void handleButtonAction(ActionEvent event) {
}
@Override
public void initialize(URL url, ResourceBundle rb) {
}
}
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>
TextController.java
public class TextController implements Initializable {
@FXML
private TextField textField1;
@FXML
private TextField textField2;
@Override
public void initialize(URL url, ResourceBundle rb) {
}
}
How can I achieve this functionality? I have taken into consideration that these two FXMLs are loaded at the same time as two different windows.
回答1:
With some modification in above answer (by SnakeDoc), i am able to achieved the functionality.
I have created a separate Singleton class:
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;
}
}
The text fields are set in the initialize method.
TextController.java
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);
}
}
The getter methods are called in the class ButtonController.java
ButtonController.java
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) {
}
}
回答2:
Turn your controller into a Singleton, then have a setter/getter and the other Controller and then access the values.
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) {
}
}
Then in your other controller you can do something like:
TextController.getInstance().getTextField1();
etc.
来源：https://stackoverflow.com/questions/19883563/how-to-get-data-in-one-java-fxml-controller-from-another-fxml-controller-these