惠州如何将数据映射添加到JavaFX表中？_北大青鸟IT学校

如何将数据映射添加到JavaFX表中？这是大家在学习Java的过程都会遇到的问题，那么下面我们一起来看看惠州北大青鸟学术部老师是怎么解答的。

我们可以使用 MapValueFactory 类将 Map 数据添加到表中。

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import java.util.HashMap;

import java.util.Map;

import javafx.application.Application;

import javafx.collections.FXCollections;

import javafx.collections.ObservableList;

import javafx.geometry.Insets;

import javafx.scene.Group;

import javafx.scene.Scene;

import javafx.scene.control.Label;

import javafx.scene.control.TableCell;

import javafx.scene.control.TableColumn;

import javafx.scene.control.TableView;

import javafx.scene.control.cell.MapValueFactory;

import javafx.scene.control.cell.TextFieldTableCell;

import javafx.scene.layout.VBox;

import javafx.scene.text.Font;

import javafx.stage.Stage;

import javafx.util.Callback;

import javafx.util.StringConverter;

public class Main extends Application {

    public static final String Column1MapKey = "A";

    public static final String Column2MapKey = "B";

    public static void main(String[] args) {

        launch(args);

    }

    @Override

    public void start(Stage stage) {

        Scene scene = new Scene(new Group());

        stage.setTitle("Table View Sample");

        stage.setWidth(300);

        stage.setHeight(500);

        final Label label = new Label("Student IDs");

        label.setFont(new Font("Arial", 20));

        TableColumn<Map, String> firstDataColumn = new TableColumn<>("Class A");

        TableColumn<Map, String> secondDataColumn = new TableColumn<>("Class B");

        firstDataColumn.setCellValueFactory(new MapValueFactory(Column1MapKey));

        firstDataColumn.setMinWidth(130);

        secondDataColumn.setCellValueFactory(new MapValueFactory(Column2MapKey));

        secondDataColumn.setMinWidth(130);

        TableView tableView = new TableView<>(generateDataInMap());

        tableView.setEditable(true);

        tableView.getSelectionModel().setCellSelectionEnabled(true);

        tableView.getColumns().setAll(firstDataColumn, secondDataColumn);

        Callback<TableColumn<Map, String>, TableCell<Map, String>>

            cellFactoryForMap = (TableColumn<Map, String> p) -> 

                new TextFieldTableCell(new StringConverter() {

                    @Override

                        public String toString(Object t) {

                        return t.toString();

                    }

                    @Override

                    public Object fromString(String string) {

                        return string;

                    }

            });

        firstDataColumn.setCellFactory(cellFactoryForMap);

        secondDataColumn.setCellFactory(cellFactoryForMap);

        final VBox vbox = new VBox();

        vbox.setSpacing(5);

        vbox.setPadding(new Insets(10, 0, 0, 10));

        vbox.getChildren().addAll(label, tableView);

        ((Group) scene.getRoot()).getChildren().addAll(vbox);

        stage.setScene(scene);

        stage.show();

    }

    private ObservableList<Map> generateDataInMap() {

        int max = 10;

        ObservableList<Map> allData = FXCollections.observableArrayList();

        for (int i = 1; i < max; i++) {

            Map<String, String> dataRow = new HashMap<>();

            String value1 = "A" + i;

            String value2 = "B" + i;

            dataRow.put(Column1MapKey, value1);

            dataRow.put(Column2MapKey, value2);

            allData.add(dataRow);

        }

        return allData;

    }

}

上面的代码生成以下结果。

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