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Java 在同一窗口中打开另一个网格窗格

java javafx

Java 在同一窗口中打开另一个网格窗格,java,javafx,controller,fxml,Java,Javafx,Controller,Fxml,所以我有一个登录页面。如果您单击“非用户？立即注册！”它将在同一窗口中打开一个新页面。现在我要打开第二页，但它在一个单独的窗口中。它还会在打开注册表页时创建错误消息。代码如下： 主要 控制器 public class Controller { private Stage stage = new Stage(); private GridPane pane = new GridPane(); private boolean passwordsCheck = false;

所以我有一个登录页面。如果您单击“非用户？立即注册！”它将在同一窗口中打开一个新页面。现在我要打开第二页，但它在一个单独的窗口中。它还会在打开注册表页时创建错误消息。代码如下：

主要

控制器

public class Controller {
    private Stage stage = new Stage();
    private GridPane pane = new GridPane();
    private boolean passwordsCheck = false;
    @FXML TextField password;
    @FXML TextField passwordConfirm;
    @FXML GridPane mainPane;
    @FXML GridPane registerPage;

    public void handleSubmitButtonAction(ActionEvent actionEvent) {

    }
    public void goToRegisterNewUserPage(ActionEvent e) throws Exception{

        RegisterPage page = new RegisterPage(stage);
        page.getScene().getWindow().hide();
//      this is where the error gets thrown up
    }
注册页

public class RegisterPage extends GridPane {

    @FXML GridPane mainPane;
    @FXML GridPane RegisterUsers;

    public RegisterPage(Stage stage) throws Exception{

        FXMLLoader loader = new FXMLLoader();
        GridPane RegisterUsers = loader.load(getClass().getClassLoader().getResource("RegisterUsers.fxml"));
        stage.setScene(new Scene(RegisterUsers, 500, 475));
        stage.show();
    }
}
登录页面以及相关超链接的sample.fxml

<GridPane fx:id="mainPanes"
            fx:controller="sample.Controller"
            xmlns:fx="http://javafx.com/fxml"
            alignment="center" hgap="10" vgap="10">
<Hyperlink text="Forgot password?"
                   onAction="#goToForgotPasswordPage"/>
RegisterUsers.fxml用于“注册用户”页面。我不确定你是否需要这个，但它的fx:id=registerPage。因此，基本上点击超链接应该在同一个窗口中打开注册用户，而不是第二个窗口。如果它能自动调整大小，那会很酷，但如果不能，我可以稍后再做。我怀疑新窗口与
page.getScene（）.getWindow（）.hide（）有关。我在控制器中尝试了很多不同的东西。在此之前，我尝试从sample.fxml文件调用GridPane主窗格，然后调用
mainPane.getChildren（）.setAll（第页）但这也不起作用。谢谢你看
 实现这一点的方法可能有很多，但我举了一个简单的例子。基本上，您将拥有一个只包含一个
VBox
的
MainLayout
。这是主窗口的
contentPane

在该
VBox
中，我们将加载
LoginLayout.fxml
。单击
Register
按钮时，我们将加载
RegisterLayout.fxml
并替换
contentPane
的子级

下面是一个完整的示例，您可以复制该示例以查看其运行情况：

Main.java:


package loginExample;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Scene;
import javafx.stage.Stage;

import java.io.IOException;

public class Main extends Application {

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

    @Override
    public void start(Stage primaryStage) {

        try {
            FXMLLoader loader = new FXMLLoader(getClass().getResource("/loginExample/MainLayout.fxml"));
            loader.setController(new MainController());

            primaryStage.setTitle("Login Example");
            primaryStage.setWidth(300);
            primaryStage.setHeight(200);
            primaryStage.setScene(new Scene(loader.load()));
            primaryStage.show();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}



package loginExample;

import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.VBox;

import java.io.IOException;

public class MainController {

    @FXML
    private VBox contentPane;

    @FXML
    private void initialize() {

        // Initially start with the login layout
        try {
            FXMLLoader loader = new FXMLLoader(getClass().getResource("/loginExample/LoginLayout.fxml"));

            // Set the LoginController and pass a reference to the MainController. This allows the LoginController
            // to access our contentPane.
            loader.setController(new LoginController(this));

            // Now, load the login layout into our contentPane
            GridPane gridPane = loader.load();
            contentPane.getChildren().add(gridPane);
        } catch (IOException e) {
            e.printStackTrace();
        }

    }

    public VBox getContentPane() {
        return contentPane;
    }
}



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

<?import javafx.geometry.Insets?>
<?import javafx.scene.layout.VBox?>
<VBox fx:id="contentPane" xmlns="http://javafx.com/javafx/9.0.1" xmlns:fx="http://javafx.com/fxml/1">
    <padding>
        <Insets bottom="10.0" left="10.0" right="10.0" top="10.0"/>
    </padding>
</VBox>



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

<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<GridPane hgap="10.0" vgap="5.0" xmlns="http://javafx.com/javafx/9.0.1" xmlns:fx="http://javafx.com/fxml/1">
    <columnConstraints>
        <ColumnConstraints halignment="RIGHT" hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0"/>
        <ColumnConstraints hgrow="SOMETIMES" minWidth="-Infinity"/>
    </columnConstraints>
    <rowConstraints>
        <RowConstraints minHeight="-Infinity" vgrow="NEVER"/>
        <RowConstraints minHeight="-Infinity" vgrow="SOMETIMES"/>
        <RowConstraints minHeight="-Infinity" vgrow="SOMETIMES"/>
        <RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES"/>
    </rowConstraints>
    <children>
        <HBox alignment="CENTER" GridPane.columnSpan="2">
            <children>
                <Label style="-fx-font-size: 150%; -fx-font-weight: bold;" text="Please login below:"/>
            </children>
        </HBox>
        <Label text="Username:" GridPane.rowIndex="1"/>
        <Label text="Password:" GridPane.rowIndex="2"/>
        <TextField GridPane.columnIndex="1" GridPane.rowIndex="1"/>
        <HBox alignment="CENTER_RIGHT" spacing="10.0" GridPane.columnSpan="2" GridPane.rowIndex="3">
            <children>
                <Button fx:id="btnRegister" mnemonicParsing="false" text="Register"/>
                <Button defaultButton="true" mnemonicParsing="false" text="Login"/>
            </children>
        </HBox>
        <PasswordField GridPane.columnIndex="1" GridPane.rowIndex="2"/>
    </children>
</GridPane>



package loginExample;

import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.scene.control.Button;

import java.io.IOException;

public class RegisterController {

    @FXML
    private Button btnCancel;

    private MainController mainController;

    public RegisterController(MainController mainController) {
        this.mainController = mainController;
    }

    @FXML
    private void initialize() {

        btnCancel.setOnAction(event -> {
            try {
                FXMLLoader loader = new FXMLLoader(getClass().getResource("/loginExample/LoginLayout.fxml"));
                loader.setController(new LoginController(mainController));

                // Set our RegisterLayout as the new content for our MainLayout window
                mainController.getContentPane().getChildren().clear();
                mainController.getContentPane().getChildren().add(loader.load());

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

    }
}



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

<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<GridPane hgap="10.0" vgap="5.0" xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/9.0.1">
    <columnConstraints>
        <ColumnConstraints halignment="RIGHT" hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0"/>
        <ColumnConstraints hgrow="SOMETIMES" minWidth="-Infinity"/>
    </columnConstraints>
    <rowConstraints>
        <RowConstraints minHeight="-Infinity" vgrow="NEVER"/>
        <RowConstraints minHeight="-Infinity" vgrow="SOMETIMES"/>
        <RowConstraints minHeight="-Infinity" vgrow="SOMETIMES"/>
        <RowConstraints minHeight="-Infinity" vgrow="SOMETIMES"/>
        <RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES"/>
    </rowConstraints>
    <children>
        <HBox alignment="CENTER" GridPane.columnSpan="2">
            <children>
                <Label style="-fx-font-size: 150%; -fx-font-weight: bold;" text="Fill Form to Register:"/>
            </children>
        </HBox>
        <Label text="Username:" GridPane.rowIndex="1"/>
        <Label text="Password:" GridPane.rowIndex="2"/>
        <Label text="Re-enter Password:" GridPane.rowIndex="3"/>
        <TextField GridPane.columnIndex="1" GridPane.rowIndex="1"/>
        <HBox alignment="CENTER_RIGHT" spacing="10.0" GridPane.columnSpan="2" GridPane.rowIndex="4">
            <children>
                <Button fx:id="btnCancel" cancelButton="true" mnemonicParsing="false" text="Cancel"/>
                <Button defaultButton="true" mnemonicParsing="false" text="Register"/>
            </children>
        </HBox>
        <PasswordField GridPane.columnIndex="1" GridPane.rowIndex="2"/>
        <PasswordField GridPane.columnIndex="1" GridPane.rowIndex="3"/>
    </children>
</GridPane>




MainController.java:


package loginExample;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Scene;
import javafx.stage.Stage;

import java.io.IOException;

public class Main extends Application {

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

    @Override
    public void start(Stage primaryStage) {

        try {
            FXMLLoader loader = new FXMLLoader(getClass().getResource("/loginExample/MainLayout.fxml"));
            loader.setController(new MainController());

            primaryStage.setTitle("Login Example");
            primaryStage.setWidth(300);
            primaryStage.setHeight(200);
            primaryStage.setScene(new Scene(loader.load()));
            primaryStage.show();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}



package loginExample;

import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.VBox;

import java.io.IOException;

public class MainController {

    @FXML
    private VBox contentPane;

    @FXML
    private void initialize() {

        // Initially start with the login layout
        try {
            FXMLLoader loader = new FXMLLoader(getClass().getResource("/loginExample/LoginLayout.fxml"));

            // Set the LoginController and pass a reference to the MainController. This allows the LoginController
            // to access our contentPane.
            loader.setController(new LoginController(this));

            // Now, load the login layout into our contentPane
            GridPane gridPane = loader.load();
            contentPane.getChildren().add(gridPane);
        } catch (IOException e) {
            e.printStackTrace();
        }

    }

    public VBox getContentPane() {
        return contentPane;
    }
}



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

<?import javafx.geometry.Insets?>
<?import javafx.scene.layout.VBox?>
<VBox fx:id="contentPane" xmlns="http://javafx.com/javafx/9.0.1" xmlns:fx="http://javafx.com/fxml/1">
    <padding>
        <Insets bottom="10.0" left="10.0" right="10.0" top="10.0"/>
    </padding>
</VBox>



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

<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<GridPane hgap="10.0" vgap="5.0" xmlns="http://javafx.com/javafx/9.0.1" xmlns:fx="http://javafx.com/fxml/1">
    <columnConstraints>
        <ColumnConstraints halignment="RIGHT" hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0"/>
        <ColumnConstraints hgrow="SOMETIMES" minWidth="-Infinity"/>
    </columnConstraints>
    <rowConstraints>
        <RowConstraints minHeight="-Infinity" vgrow="NEVER"/>
        <RowConstraints minHeight="-Infinity" vgrow="SOMETIMES"/>
        <RowConstraints minHeight="-Infinity" vgrow="SOMETIMES"/>
        <RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES"/>
    </rowConstraints>
    <children>
        <HBox alignment="CENTER" GridPane.columnSpan="2">
            <children>
                <Label style="-fx-font-size: 150%; -fx-font-weight: bold;" text="Please login below:"/>
            </children>
        </HBox>
        <Label text="Username:" GridPane.rowIndex="1"/>
        <Label text="Password:" GridPane.rowIndex="2"/>
        <TextField GridPane.columnIndex="1" GridPane.rowIndex="1"/>
        <HBox alignment="CENTER_RIGHT" spacing="10.0" GridPane.columnSpan="2" GridPane.rowIndex="3">
            <children>
                <Button fx:id="btnRegister" mnemonicParsing="false" text="Register"/>
                <Button defaultButton="true" mnemonicParsing="false" text="Login"/>
            </children>
        </HBox>
        <PasswordField GridPane.columnIndex="1" GridPane.rowIndex="2"/>
    </children>
</GridPane>



package loginExample;

import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.scene.control.Button;

import java.io.IOException;

public class RegisterController {

    @FXML
    private Button btnCancel;

    private MainController mainController;

    public RegisterController(MainController mainController) {
        this.mainController = mainController;
    }

    @FXML
    private void initialize() {

        btnCancel.setOnAction(event -> {
            try {
                FXMLLoader loader = new FXMLLoader(getClass().getResource("/loginExample/LoginLayout.fxml"));
                loader.setController(new LoginController(mainController));

                // Set our RegisterLayout as the new content for our MainLayout window
                mainController.getContentPane().getChildren().clear();
                mainController.getContentPane().getChildren().add(loader.load());

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

    }
}



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

<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<GridPane hgap="10.0" vgap="5.0" xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/9.0.1">
    <columnConstraints>
        <ColumnConstraints halignment="RIGHT" hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0"/>
        <ColumnConstraints hgrow="SOMETIMES" minWidth="-Infinity"/>
    </columnConstraints>
    <rowConstraints>
        <RowConstraints minHeight="-Infinity" vgrow="NEVER"/>
        <RowConstraints minHeight="-Infinity" vgrow="SOMETIMES"/>
        <RowConstraints minHeight="-Infinity" vgrow="SOMETIMES"/>
        <RowConstraints minHeight="-Infinity" vgrow="SOMETIMES"/>
        <RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES"/>
    </rowConstraints>
    <children>
        <HBox alignment="CENTER" GridPane.columnSpan="2">
            <children>
                <Label style="-fx-font-size: 150%; -fx-font-weight: bold;" text="Fill Form to Register:"/>
            </children>
        </HBox>
        <Label text="Username:" GridPane.rowIndex="1"/>
        <Label text="Password:" GridPane.rowIndex="2"/>
        <Label text="Re-enter Password:" GridPane.rowIndex="3"/>
        <TextField GridPane.columnIndex="1" GridPane.rowIndex="1"/>
        <HBox alignment="CENTER_RIGHT" spacing="10.0" GridPane.columnSpan="2" GridPane.rowIndex="4">
            <children>
                <Button fx:id="btnCancel" cancelButton="true" mnemonicParsing="false" text="Cancel"/>
                <Button defaultButton="true" mnemonicParsing="false" text="Register"/>
            </children>
        </HBox>
        <PasswordField GridPane.columnIndex="1" GridPane.rowIndex="2"/>
        <PasswordField GridPane.columnIndex="1" GridPane.rowIndex="3"/>
    </children>
</GridPane>




mainloayout.fxml:


package loginExample;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Scene;
import javafx.stage.Stage;

import java.io.IOException;

public class Main extends Application {

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

    @Override
    public void start(Stage primaryStage) {

        try {
            FXMLLoader loader = new FXMLLoader(getClass().getResource("/loginExample/MainLayout.fxml"));
            loader.setController(new MainController());

            primaryStage.setTitle("Login Example");
            primaryStage.setWidth(300);
            primaryStage.setHeight(200);
            primaryStage.setScene(new Scene(loader.load()));
            primaryStage.show();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}



package loginExample;

import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.VBox;

import java.io.IOException;

public class MainController {

    @FXML
    private VBox contentPane;

    @FXML
    private void initialize() {

        // Initially start with the login layout
        try {
            FXMLLoader loader = new FXMLLoader(getClass().getResource("/loginExample/LoginLayout.fxml"));

            // Set the LoginController and pass a reference to the MainController. This allows the LoginController
            // to access our contentPane.
            loader.setController(new LoginController(this));

            // Now, load the login layout into our contentPane
            GridPane gridPane = loader.load();
            contentPane.getChildren().add(gridPane);
        } catch (IOException e) {
            e.printStackTrace();
        }

    }

    public VBox getContentPane() {
        return contentPane;
    }
}



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

<?import javafx.geometry.Insets?>
<?import javafx.scene.layout.VBox?>
<VBox fx:id="contentPane" xmlns="http://javafx.com/javafx/9.0.1" xmlns:fx="http://javafx.com/fxml/1">
    <padding>
        <Insets bottom="10.0" left="10.0" right="10.0" top="10.0"/>
    </padding>
</VBox>



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

<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<GridPane hgap="10.0" vgap="5.0" xmlns="http://javafx.com/javafx/9.0.1" xmlns:fx="http://javafx.com/fxml/1">
    <columnConstraints>
        <ColumnConstraints halignment="RIGHT" hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0"/>
        <ColumnConstraints hgrow="SOMETIMES" minWidth="-Infinity"/>
    </columnConstraints>
    <rowConstraints>
        <RowConstraints minHeight="-Infinity" vgrow="NEVER"/>
        <RowConstraints minHeight="-Infinity" vgrow="SOMETIMES"/>
        <RowConstraints minHeight="-Infinity" vgrow="SOMETIMES"/>
        <RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES"/>
    </rowConstraints>
    <children>
        <HBox alignment="CENTER" GridPane.columnSpan="2">
            <children>
                <Label style="-fx-font-size: 150%; -fx-font-weight: bold;" text="Please login below:"/>
            </children>
        </HBox>
        <Label text="Username:" GridPane.rowIndex="1"/>
        <Label text="Password:" GridPane.rowIndex="2"/>
        <TextField GridPane.columnIndex="1" GridPane.rowIndex="1"/>
        <HBox alignment="CENTER_RIGHT" spacing="10.0" GridPane.columnSpan="2" GridPane.rowIndex="3">
            <children>
                <Button fx:id="btnRegister" mnemonicParsing="false" text="Register"/>
                <Button defaultButton="true" mnemonicParsing="false" text="Login"/>
            </children>
        </HBox>
        <PasswordField GridPane.columnIndex="1" GridPane.rowIndex="2"/>
    </children>
</GridPane>



package loginExample;

import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.scene.control.Button;

import java.io.IOException;

public class RegisterController {

    @FXML
    private Button btnCancel;

    private MainController mainController;

    public RegisterController(MainController mainController) {
        this.mainController = mainController;
    }

    @FXML
    private void initialize() {

        btnCancel.setOnAction(event -> {
            try {
                FXMLLoader loader = new FXMLLoader(getClass().getResource("/loginExample/LoginLayout.fxml"));
                loader.setController(new LoginController(mainController));

                // Set our RegisterLayout as the new content for our MainLayout window
                mainController.getContentPane().getChildren().clear();
                mainController.getContentPane().getChildren().add(loader.load());

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

    }
}



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

<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<GridPane hgap="10.0" vgap="5.0" xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/9.0.1">
    <columnConstraints>
        <ColumnConstraints halignment="RIGHT" hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0"/>
        <ColumnConstraints hgrow="SOMETIMES" minWidth="-Infinity"/>
    </columnConstraints>
    <rowConstraints>
        <RowConstraints minHeight="-Infinity" vgrow="NEVER"/>
        <RowConstraints minHeight="-Infinity" vgrow="SOMETIMES"/>
        <RowConstraints minHeight="-Infinity" vgrow="SOMETIMES"/>
        <RowConstraints minHeight="-Infinity" vgrow="SOMETIMES"/>
        <RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES"/>
    </rowConstraints>
    <children>
        <HBox alignment="CENTER" GridPane.columnSpan="2">
            <children>
                <Label style="-fx-font-size: 150%; -fx-font-weight: bold;" text="Fill Form to Register:"/>
            </children>
        </HBox>
        <Label text="Username:" GridPane.rowIndex="1"/>
        <Label text="Password:" GridPane.rowIndex="2"/>
        <Label text="Re-enter Password:" GridPane.rowIndex="3"/>
        <TextField GridPane.columnIndex="1" GridPane.rowIndex="1"/>
        <HBox alignment="CENTER_RIGHT" spacing="10.0" GridPane.columnSpan="2" GridPane.rowIndex="4">
            <children>
                <Button fx:id="btnCancel" cancelButton="true" mnemonicParsing="false" text="Cancel"/>
                <Button defaultButton="true" mnemonicParsing="false" text="Register"/>
            </children>
        </HBox>
        <PasswordField GridPane.columnIndex="1" GridPane.rowIndex="2"/>
        <PasswordField GridPane.columnIndex="1" GridPane.rowIndex="3"/>
    </children>
</GridPane>




LoginLayout.fxml:


package loginExample;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Scene;
import javafx.stage.Stage;

import java.io.IOException;

public class Main extends Application {

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

    @Override
    public void start(Stage primaryStage) {

        try {
            FXMLLoader loader = new FXMLLoader(getClass().getResource("/loginExample/MainLayout.fxml"));
            loader.setController(new MainController());

            primaryStage.setTitle("Login Example");
            primaryStage.setWidth(300);
            primaryStage.setHeight(200);
            primaryStage.setScene(new Scene(loader.load()));
            primaryStage.show();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}



package loginExample;

import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.VBox;

import java.io.IOException;

public class MainController {

    @FXML
    private VBox contentPane;

    @FXML
    private void initialize() {

        // Initially start with the login layout
        try {
            FXMLLoader loader = new FXMLLoader(getClass().getResource("/loginExample/LoginLayout.fxml"));

            // Set the LoginController and pass a reference to the MainController. This allows the LoginController
            // to access our contentPane.
            loader.setController(new LoginController(this));

            // Now, load the login layout into our contentPane
            GridPane gridPane = loader.load();
            contentPane.getChildren().add(gridPane);
        } catch (IOException e) {
            e.printStackTrace();
        }

    }

    public VBox getContentPane() {
        return contentPane;
    }
}



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

<?import javafx.geometry.Insets?>
<?import javafx.scene.layout.VBox?>
<VBox fx:id="contentPane" xmlns="http://javafx.com/javafx/9.0.1" xmlns:fx="http://javafx.com/fxml/1">
    <padding>
        <Insets bottom="10.0" left="10.0" right="10.0" top="10.0"/>
    </padding>
</VBox>



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

<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<GridPane hgap="10.0" vgap="5.0" xmlns="http://javafx.com/javafx/9.0.1" xmlns:fx="http://javafx.com/fxml/1">
    <columnConstraints>
        <ColumnConstraints halignment="RIGHT" hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0"/>
        <ColumnConstraints hgrow="SOMETIMES" minWidth="-Infinity"/>
    </columnConstraints>
    <rowConstraints>
        <RowConstraints minHeight="-Infinity" vgrow="NEVER"/>
        <RowConstraints minHeight="-Infinity" vgrow="SOMETIMES"/>
        <RowConstraints minHeight="-Infinity" vgrow="SOMETIMES"/>
        <RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES"/>
    </rowConstraints>
    <children>
        <HBox alignment="CENTER" GridPane.columnSpan="2">
            <children>
                <Label style="-fx-font-size: 150%; -fx-font-weight: bold;" text="Please login below:"/>
            </children>
        </HBox>
        <Label text="Username:" GridPane.rowIndex="1"/>
        <Label text="Password:" GridPane.rowIndex="2"/>
        <TextField GridPane.columnIndex="1" GridPane.rowIndex="1"/>
        <HBox alignment="CENTER_RIGHT" spacing="10.0" GridPane.columnSpan="2" GridPane.rowIndex="3">
            <children>
                <Button fx:id="btnRegister" mnemonicParsing="false" text="Register"/>
                <Button defaultButton="true" mnemonicParsing="false" text="Login"/>
            </children>
        </HBox>
        <PasswordField GridPane.columnIndex="1" GridPane.rowIndex="2"/>
    </children>
</GridPane>



package loginExample;

import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.scene.control.Button;

import java.io.IOException;

public class RegisterController {

    @FXML
    private Button btnCancel;

    private MainController mainController;

    public RegisterController(MainController mainController) {
        this.mainController = mainController;
    }

    @FXML
    private void initialize() {

        btnCancel.setOnAction(event -> {
            try {
                FXMLLoader loader = new FXMLLoader(getClass().getResource("/loginExample/LoginLayout.fxml"));
                loader.setController(new LoginController(mainController));

                // Set our RegisterLayout as the new content for our MainLayout window
                mainController.getContentPane().getChildren().clear();
                mainController.getContentPane().getChildren().add(loader.load());

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

    }
}



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

<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<GridPane hgap="10.0" vgap="5.0" xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/9.0.1">
    <columnConstraints>
        <ColumnConstraints halignment="RIGHT" hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0"/>
        <ColumnConstraints hgrow="SOMETIMES" minWidth="-Infinity"/>
    </columnConstraints>
    <rowConstraints>
        <RowConstraints minHeight="-Infinity" vgrow="NEVER"/>
        <RowConstraints minHeight="-Infinity" vgrow="SOMETIMES"/>
        <RowConstraints minHeight="-Infinity" vgrow="SOMETIMES"/>
        <RowConstraints minHeight="-Infinity" vgrow="SOMETIMES"/>
        <RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES"/>
    </rowConstraints>
    <children>
        <HBox alignment="CENTER" GridPane.columnSpan="2">
            <children>
                <Label style="-fx-font-size: 150%; -fx-font-weight: bold;" text="Fill Form to Register:"/>
            </children>
        </HBox>
        <Label text="Username:" GridPane.rowIndex="1"/>
        <Label text="Password:" GridPane.rowIndex="2"/>
        <Label text="Re-enter Password:" GridPane.rowIndex="3"/>
        <TextField GridPane.columnIndex="1" GridPane.rowIndex="1"/>
        <HBox alignment="CENTER_RIGHT" spacing="10.0" GridPane.columnSpan="2" GridPane.rowIndex="4">
            <children>
                <Button fx:id="btnCancel" cancelButton="true" mnemonicParsing="false" text="Cancel"/>
                <Button defaultButton="true" mnemonicParsing="false" text="Register"/>
            </children>
        </HBox>
        <PasswordField GridPane.columnIndex="1" GridPane.rowIndex="2"/>
        <PasswordField GridPane.columnIndex="1" GridPane.rowIndex="3"/>
    </children>
</GridPane>




RegisterLayout.fxml:


package loginExample;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Scene;
import javafx.stage.Stage;

import java.io.IOException;

public class Main extends Application {

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

    @Override
    public void start(Stage primaryStage) {

        try {
            FXMLLoader loader = new FXMLLoader(getClass().getResource("/loginExample/MainLayout.fxml"));
            loader.setController(new MainController());

            primaryStage.setTitle("Login Example");
            primaryStage.setWidth(300);
            primaryStage.setHeight(200);
            primaryStage.setScene(new Scene(loader.load()));
            primaryStage.show();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}



package loginExample;

import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.VBox;

import java.io.IOException;

public class MainController {

    @FXML
    private VBox contentPane;

    @FXML
    private void initialize() {

        // Initially start with the login layout
        try {
            FXMLLoader loader = new FXMLLoader(getClass().getResource("/loginExample/LoginLayout.fxml"));

            // Set the LoginController and pass a reference to the MainController. This allows the LoginController
            // to access our contentPane.
            loader.setController(new LoginController(this));

            // Now, load the login layout into our contentPane
            GridPane gridPane = loader.load();
            contentPane.getChildren().add(gridPane);
        } catch (IOException e) {
            e.printStackTrace();
        }

    }

    public VBox getContentPane() {
        return contentPane;
    }
}



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

<?import javafx.geometry.Insets?>
<?import javafx.scene.layout.VBox?>
<VBox fx:id="contentPane" xmlns="http://javafx.com/javafx/9.0.1" xmlns:fx="http://javafx.com/fxml/1">
    <padding>
        <Insets bottom="10.0" left="10.0" right="10.0" top="10.0"/>
    </padding>
</VBox>



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

<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<GridPane hgap="10.0" vgap="5.0" xmlns="http://javafx.com/javafx/9.0.1" xmlns:fx="http://javafx.com/fxml/1">
    <columnConstraints>
        <ColumnConstraints halignment="RIGHT" hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0"/>
        <ColumnConstraints hgrow="SOMETIMES" minWidth="-Infinity"/>
    </columnConstraints>
    <rowConstraints>
        <RowConstraints minHeight="-Infinity" vgrow="NEVER"/>
        <RowConstraints minHeight="-Infinity" vgrow="SOMETIMES"/>
        <RowConstraints minHeight="-Infinity" vgrow="SOMETIMES"/>
        <RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES"/>
    </rowConstraints>
    <children>
        <HBox alignment="CENTER" GridPane.columnSpan="2">
            <children>
                <Label style="-fx-font-size: 150%; -fx-font-weight: bold;" text="Please login below:"/>
            </children>
        </HBox>
        <Label text="Username:" GridPane.rowIndex="1"/>
        <Label text="Password:" GridPane.rowIndex="2"/>
        <TextField GridPane.columnIndex="1" GridPane.rowIndex="1"/>
        <HBox alignment="CENTER_RIGHT" spacing="10.0" GridPane.columnSpan="2" GridPane.rowIndex="3">
            <children>
                <Button fx:id="btnRegister" mnemonicParsing="false" text="Register"/>
                <Button defaultButton="true" mnemonicParsing="false" text="Login"/>
            </children>
        </HBox>
        <PasswordField GridPane.columnIndex="1" GridPane.rowIndex="2"/>
    </children>
</GridPane>



package loginExample;

import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.scene.control.Button;

import java.io.IOException;

public class RegisterController {

    @FXML
    private Button btnCancel;

    private MainController mainController;

    public RegisterController(MainController mainController) {
        this.mainController = mainController;
    }

    @FXML
    private void initialize() {

        btnCancel.setOnAction(event -> {
            try {
                FXMLLoader loader = new FXMLLoader(getClass().getResource("/loginExample/LoginLayout.fxml"));
                loader.setController(new LoginController(mainController));

                // Set our RegisterLayout as the new content for our MainLayout window
                mainController.getContentPane().getChildren().clear();
                mainController.getContentPane().getChildren().add(loader.load());

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

    }
}



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

<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<GridPane hgap="10.0" vgap="5.0" xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/9.0.1">
    <columnConstraints>
        <ColumnConstraints halignment="RIGHT" hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0"/>
        <ColumnConstraints hgrow="SOMETIMES" minWidth="-Infinity"/>
    </columnConstraints>
    <rowConstraints>
        <RowConstraints minHeight="-Infinity" vgrow="NEVER"/>
        <RowConstraints minHeight="-Infinity" vgrow="SOMETIMES"/>
        <RowConstraints minHeight="-Infinity" vgrow="SOMETIMES"/>
        <RowConstraints minHeight="-Infinity" vgrow="SOMETIMES"/>
        <RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES"/>
    </rowConstraints>
    <children>
        <HBox alignment="CENTER" GridPane.columnSpan="2">
            <children>
                <Label style="-fx-font-size: 150%; -fx-font-weight: bold;" text="Fill Form to Register:"/>
            </children>
        </HBox>
        <Label text="Username:" GridPane.rowIndex="1"/>
        <Label text="Password:" GridPane.rowIndex="2"/>
        <Label text="Re-enter Password:" GridPane.rowIndex="3"/>
        <TextField GridPane.columnIndex="1" GridPane.rowIndex="1"/>
        <HBox alignment="CENTER_RIGHT" spacing="10.0" GridPane.columnSpan="2" GridPane.rowIndex="4">
            <children>
                <Button fx:id="btnCancel" cancelButton="true" mnemonicParsing="false" text="Cancel"/>
                <Button defaultButton="true" mnemonicParsing="false" text="Register"/>
            </children>
        </HBox>
        <PasswordField GridPane.columnIndex="1" GridPane.rowIndex="2"/>
        <PasswordField GridPane.columnIndex="1" GridPane.rowIndex="3"/>
    </children>
</GridPane>








结果：


package loginExample;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Scene;
import javafx.stage.Stage;

import java.io.IOException;

public class Main extends Application {

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

    @Override
    public void start(Stage primaryStage) {

        try {
            FXMLLoader loader = new FXMLLoader(getClass().getResource("/loginExample/MainLayout.fxml"));
            loader.setController(new MainController());

            primaryStage.setTitle("Login Example");
            primaryStage.setWidth(300);
            primaryStage.setHeight(200);
            primaryStage.setScene(new Scene(loader.load()));
            primaryStage.show();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}



package loginExample;

import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.VBox;

import java.io.IOException;

public class MainController {

    @FXML
    private VBox contentPane;

    @FXML
    private void initialize() {

        // Initially start with the login layout
        try {
            FXMLLoader loader = new FXMLLoader(getClass().getResource("/loginExample/LoginLayout.fxml"));

            // Set the LoginController and pass a reference to the MainController. This allows the LoginController
            // to access our contentPane.
            loader.setController(new LoginController(this));

            // Now, load the login layout into our contentPane
            GridPane gridPane = loader.load();
            contentPane.getChildren().add(gridPane);
        } catch (IOException e) {
            e.printStackTrace();
        }

    }

    public VBox getContentPane() {
        return contentPane;
    }
}



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

<?import javafx.geometry.Insets?>
<?import javafx.scene.layout.VBox?>
<VBox fx:id="contentPane" xmlns="http://javafx.com/javafx/9.0.1" xmlns:fx="http://javafx.com/fxml/1">
    <padding>
        <Insets bottom="10.0" left="10.0" right="10.0" top="10.0"/>
    </padding>
</VBox>



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

<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<GridPane hgap="10.0" vgap="5.0" xmlns="http://javafx.com/javafx/9.0.1" xmlns:fx="http://javafx.com/fxml/1">
    <columnConstraints>
        <ColumnConstraints halignment="RIGHT" hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0"/>
        <ColumnConstraints hgrow="SOMETIMES" minWidth="-Infinity"/>
    </columnConstraints>
    <rowConstraints>
        <RowConstraints minHeight="-Infinity" vgrow="NEVER"/>
        <RowConstraints minHeight="-Infinity" vgrow="SOMETIMES"/>
        <RowConstraints minHeight="-Infinity" vgrow="SOMETIMES"/>
        <RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES"/>
    </rowConstraints>
    <children>
        <HBox alignment="CENTER" GridPane.columnSpan="2">
            <children>
                <Label style="-fx-font-size: 150%; -fx-font-weight: bold;" text="Please login below:"/>
            </children>
        </HBox>
        <Label text="Username:" GridPane.rowIndex="1"/>
        <Label text="Password:" GridPane.rowIndex="2"/>
        <TextField GridPane.columnIndex="1" GridPane.rowIndex="1"/>
        <HBox alignment="CENTER_RIGHT" spacing="10.0" GridPane.columnSpan="2" GridPane.rowIndex="3">
            <children>
                <Button fx:id="btnRegister" mnemonicParsing="false" text="Register"/>
                <Button defaultButton="true" mnemonicParsing="false" text="Login"/>
            </children>
        </HBox>
        <PasswordField GridPane.columnIndex="1" GridPane.rowIndex="2"/>
    </children>
</GridPane>



package loginExample;

import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.scene.control.Button;

import java.io.IOException;

public class RegisterController {

    @FXML
    private Button btnCancel;

    private MainController mainController;

    public RegisterController(MainController mainController) {
        this.mainController = mainController;
    }

    @FXML
    private void initialize() {

        btnCancel.setOnAction(event -> {
            try {
                FXMLLoader loader = new FXMLLoader(getClass().getResource("/loginExample/LoginLayout.fxml"));
                loader.setController(new LoginController(mainController));

                // Set our RegisterLayout as the new content for our MainLayout window
                mainController.getContentPane().getChildren().clear();
                mainController.getContentPane().getChildren().add(loader.load());

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

    }
}



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

<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<GridPane hgap="10.0" vgap="5.0" xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/9.0.1">
    <columnConstraints>
        <ColumnConstraints halignment="RIGHT" hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0"/>
        <ColumnConstraints hgrow="SOMETIMES" minWidth="-Infinity"/>
    </columnConstraints>
    <rowConstraints>
        <RowConstraints minHeight="-Infinity" vgrow="NEVER"/>
        <RowConstraints minHeight="-Infinity" vgrow="SOMETIMES"/>
        <RowConstraints minHeight="-Infinity" vgrow="SOMETIMES"/>
        <RowConstraints minHeight="-Infinity" vgrow="SOMETIMES"/>
        <RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES"/>
    </rowConstraints>
    <children>
        <HBox alignment="CENTER" GridPane.columnSpan="2">
            <children>
                <Label style="-fx-font-size: 150%; -fx-font-weight: bold;" text="Fill Form to Register:"/>
            </children>
        </HBox>
        <Label text="Username:" GridPane.rowIndex="1"/>
        <Label text="Password:" GridPane.rowIndex="2"/>
        <Label text="Re-enter Password:" GridPane.rowIndex="3"/>
        <TextField GridPane.columnIndex="1" GridPane.rowIndex="1"/>
        <HBox alignment="CENTER_RIGHT" spacing="10.0" GridPane.columnSpan="2" GridPane.rowIndex="4">
            <children>
                <Button fx:id="btnCancel" cancelButton="true" mnemonicParsing="false" text="Cancel"/>
                <Button defaultButton="true" mnemonicParsing="false" text="Register"/>
            </children>
        </HBox>
        <PasswordField GridPane.columnIndex="1" GridPane.rowIndex="2"/>
        <PasswordField GridPane.columnIndex="1" GridPane.rowIndex="3"/>
    </children>
</GridPane>





这是一个非常简单的示例，旨在演示该概念；您可能希望以稍微不同的方式构建您的真实世界项目。
将
阶段
视为一个“窗口”。当您为您的注册“页面”创建一个新的
阶段
时，您特别告诉JavaFX打开一个新窗口。相反，您应该在主
阶段中有一个布局节点，您可以替换它的内容。@Zephyr我试过了，但是我的setOnMouseClick上不断出现错误。这是更新后的开始方法，你是怎么做到的？我一直试图把你的代码放在我的IDE中，但我得到的只是每个loader.load（）方法下的错误行。加上fxml加载程序问题，因为我找不到合适的文件路径名。请检查您输入的位置（特别是
getClass（）.getResource（）
方法中的路径。我的示例位于
loginExample
包中，而您的可能不在其中。您在
loader.load（）上看到的错误是什么
？新文件的名称正确吗？
sample
是根包吗？如果您使用IntelliJ IDEA，您可以右键单击文件并单击“复制相对路径”以获得所需的路径（只需在前面添加
/
）。如果看不到目录结构，很难准确说出问题所在。