如何在javafx中传递参数到辅助窗口?是否有与相应控制器通信的方法?
例如: 用户从TableView中选择一个客户，然后打开一个新窗口，显示该客户的信息。
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，我找不到一种方法告诉控制器在哪里寻找客户的信息(通过传递id作为参数)。
什么好主意吗?
当前回答
你可以决定使用一个公共可观察对象列表来存储公共数据，或者只是创建一个公共setter方法来存储数据并从相应的控制器中检索
其他回答
是的，你可以。 你需要添加第一个控制器:
YourController controller = loader.getController();
controller.setclient(client);
然后在第二个语句中声明一个客户端，然后在控制器的底部:
public void setclien(Client c) {
this.client = c;
}
node类有一对方法 setUserData(对象) 而且 对象getUserData ()
您可以使用它将您的信息添加到Node。
因此，你可以调用page.setUserData(info);
如果设置了info，控制器可以检查。此外，如果需要，还可以使用ObjectProperty进行前后数据传输。
请看下面的文档: http://docs.oracle.com/javafx/2/api/javafx/fxml/doc-files/introduction_to_fxml.html 在第一个版本中，handleButtonAction()被标记为@FXML，以允许控制器文档中定义的标记调用它。在第二个示例中，button字段被注释以允许加载器设置它的值。initialize()方法也有类似的注释。”
因此，您需要将控制器与节点关联起来，并将用户数据设置为节点。
我意识到这是一个非常老的帖子，已经有了一些很好的答案， 但我想做一个简单的MCVE来演示这样一种方法，并允许新程序员快速了解实际的概念。
在这个例子中，我们将使用5个文件:
java -简单地用于启动应用程序并调用第一个控制器。 java -第一个FXML布局的控制器。 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。
所有文件都完整地列在这篇文章的底部。
目标:演示将值从Controller1传递到Controller2，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。单击按钮时，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将显示第一个场景中TextField中输入的文本。 在第二个场景的TextField中输入文本并单击它的Button后，第一个场景的Label将更新以显示输入的文本。
这是一个非常简单的演示，当然可以进行一些改进，但应该使概念非常清楚。
代码本身也注释了发生了什么以及如何发生的一些细节。
的代码
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>
Why answer a 6 year old question ? One the most fundamental concepts working with any programming language is how to navigate from one (window, form or page) to another. Also while doing this navigation the developer often wants to pass data from one (window, form or page) and display or use the data passed While most of the answers here provide good to excellent examples how to accomplish this we thought we would kick it up a notch or two or three We said three because we will navigate between three (window, form or page) and use the concept of static variables to pass data around the (window, form or page) We will also include some decision making code while we navigate
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();
}
}
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) {
}
}
Below are all the FXML files <?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>
你可以决定使用一个公共可观察对象列表来存储公共数据，或者只是创建一个公共setter方法来存储数据并从相应的控制器中检索
