Question

请，我想在点击tableview行（行选择）时加载FXML文件，并从数据库中检索行的值，并在FXML文件的标签上设置值。

到目前为止我见过的例子并没有实现。

如果有人可以帮助FXML文件加载，我将不胜感激。

我目前的代码：

package application;

import java.io.IOException;

import javafx.application.Application;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.fxml.FXMLLoader;
import javafx.stage.Stage;
import javafx.scene.Group;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.TabPane;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.scene.paint.Color;

public class Main extends Application {
ObservableList<Person> persons = FXCollections.observableArrayList();
@Override
public void start(Stage primaryStage) {
Parent root =         FXMLLoader.load(getClass().getResource("personsTable.fxml"));
    Scene scene = new Scene(root);
    newStage.setScene(newScene);
    newStage.show();
try {
         Class.forName("org.apache.derby.jdbc.ClientDriver");
        conn=DriverManager.getConnection("jdbc:derby://localhost:1527/Employee","Conduct","ccb");

        String rest="select *from Employee";
        pstmt=conn.prepareStatement(rest);
        rs=pstmt.executeQuery();



        while(rs.next()){
            persons.add(new Person(
                    rs.getString("name"),


            ));

            staff.setCellValueFactory(new PropertyValueFactory<>("name"));

            personsTable.setItems(persons);
            personsTable.getSelectionModel().selectedItemProperty().addListener(new ChangeListener<Person>() {

        @Override
        public void changed(ObservableValue<? extends Person> observable, Person oldValue, Person newValue) {

            // Create a new FXML loader 
            FXMLLoader loader = new FXMLLoader(getClass().getResource("OnSelection.fxml"));
            try {
                // Load the another FXML file 
                Parent newParent = loader.load();
                OnSelectionController subController = loader.getController();
                // Set the String property
                // If you want to use data from the current selection: newValue contains the currently selected Person
                // TODO: Get value from DB
                subController.textToDisplay.set(newValue.getName());

                // newParent contains the root of your other FXML file, do anything that you want to do with it (e.g. add to the current node graph)
                // Now I just simply open it in a new window
                Stage newStage = new Stage();
                Scene newScene = new Scene(newParent);
                newStage.setScene(newScene);
                newStage.show();

                } catch (IOException | SQLException ex) {
                    Logger.getLogger(ViewController.class.getName()).log(Level.SEVERE, null, ex);
                }
            });
}

         } catch (SQLException | ClassNotFoundException ex) {
        Logger.getLogger(ViewController.class.getName()).log(Level.SEVERE, null, ex);
    }

}

}

Answer 1

您只需为TableView的{{3}} selectedItemProperty添加一个监听器，您可以使用selectionModelProperty在其中添加另一个FXML文件。您可以在此FXML文件的控制器上公开一些公共方法和/或属性，并且可以使用此方法和/或属性来设置FXMLLoader FXMLLoader方法返回的控制器中的数据。

您的规范的简约示例：

在示例中TableView显示Person个对象，在选择TableView时，第二个FXML文件被加载并显示在新的Stage上。

Main.java

public class Main extends Application {

    @Override
    public void start(Stage primaryStage) {

        Group root = new Group();
        Scene scene = new Scene(root, 700, 400, Color.WHITE);
        TableView<Person> personsTable = new TableView<Person>();

        // Add only one Column: Name
        TableColumn<Person, String> nameCol = new TableColumn<Person, String>("Name");
        nameCol.setCellValueFactory(new PropertyValueFactory<>("name"));
        personsTable.getColumns().add(nameCol);

        // On selected item
        personsTable.getSelectionModel().selectedItemProperty().addListener(new ChangeListener<Person>() {

            @Override
            public void changed(ObservableValue<? extends Person> observable, Person oldValue, Person newValue) {

                // Create a new FXML loader 
                FXMLLoader loader = new FXMLLoader(getClass().getResource("OnSelection.fxml"));
                try {
                    // Load the another FXML file 
                    Parent newParent = loader.load();
                    OnSelectionController subController = loader.getController();
                    // Set the String property
                    // If you want to use data from the current selection: newValue contains the currently selected Person
                    // TODO: Get value from DB
                    subController.textToDisplay.set("value from DB for Person" + newValue.getName());

                    // newParent contains the root of your other FXML file, do anything that you want to do with it (e.g. add to the current node graph)
                    // Now I just simply open it in a new window
                    Stage newStage = new Stage();
                    Scene newScene = new Scene(newParent);
                    newStage.setScene(newScene);
                    newStage.show();

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

        // Create some dummy data for the table
        ObservableList<Person> persons = FXCollections.observableArrayList();
        for (int i = 0; i < 10; i++) {
            Person person = new Person();
            person.setName("Name" + i);
            person.setAddress("Address" + i);
            person.setCountry("Country" + i);
            person.setCourse("Course" + i);
            persons.add(person);

        }
        personsTable.setItems(persons);
    }

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

Person.java

public class Person {

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    public String getCountry() {
        return country;
    }

    public void setCountry(String country) {
        this.country = country;
    }

    public String getCourse() {
        return course;
    }

    public void setCourse(String course) {
        this.course = course;
    }

    private String name;
    private String address;
    private String country;
    private String course;

}

OnSelectionController.java

public class OnSelectionController implements Initializable {

    @FXML private Label label1;

    public SimpleStringProperty textToDisplay = new SimpleStringProperty("");

    @Override
    public void initialize(URL location, ResourceBundle resources) {
        // The text that the label displays is bound to the string property value
        label1.textProperty().bind(textToDisplay);

    }

}

OnSelection.fxml

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

<?import java.lang.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<?import javafx.scene.layout.AnchorPane?>

<AnchorPane prefHeight="191.0" prefWidth="210.0" xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/2.2" fx:controller="application.OnSelectionController">
  <!-- TODO Add Nodes -->
  <children>
    <Label fx:id="label1" layoutX="59.0" layoutY="40.0" text="Label" />
  </children>
</AnchorPane>

请参阅代码段中的注释。

在tableview行选择上加载FXML文件

1 个答案: