Как заполнить TableView в JavaFX из списка массивов

Question

У меня есть ArrayList, и данные внутри него были прочитаны из файла Excel. Теперь я хочу создать TableView в своем приложении JavaFX, которое заполняется из созданного ArrayList. У меня есть класс, который содержит все данные об адресе, которые читаются, такие как номер здания, название улицы и т. Д., Но я не могу взять эти данные и поместить их в табличное представление, которое просто пустое.

Вот код, который я создал до сих пор:

List<AddressDetails> addressList = ReadExcel.readExcel();

TableView<AddressDetails> table = new TableView<>();
ObservableList<AddressDetails> addresses = FXCollections.observableArrayList(addressList);

TableColumn<AddressDetails, String> buildNameCol 
  = new TableColumn<AddressDetails, String>("Building Name");
buildNameCol.setCellValueFactory(new PropertyValueFactory<AddressDetails, String>("buildName"));

TableColumn<AddressDetails, Double> buildNumCol
  = new TableColumn<AddressDetails, Double>("Building Number");
buildNumCol.setCellValueFactory(new PropertyValueFactory<AddressDetails, Double>("buildNum"));

TableColumn<AddressDetails, String> streetCol
  = new TableColumn<AddressDetails, String>("Street Name");
streetCol.setCellValueFactory(new PropertyValueFactory<AddressDetails, String>("streetName"));

TableColumn<AddressDetails, String> cityCol
  = new TableColumn<AddressDetails, String>("City");
cityCol.setCellValueFactory(new PropertyValueFactory<AddressDetails, String>("city"));

TableColumn<AddressDetails, String> postCol 
  = new TableColumn<AddressDetails, String>("Postcode");
postCol.setCellValueFactory(new PropertyValueFactory<AddressDetails, String>("postCode"));

TableColumn<AddressDetails, String> countryCol
  = new TableColumn<AddressDetails, String>("Country");
countryCol.setCellValueFactory(new PropertyValueFactory<AddressDetails, String>("country"));

table.getColumns().addAll(buildNameCol, buildNumCol, streetCol, cityCol, postCol, countryCol); 
table.setItems(addresses);

Это мой AddressDetails Класс:

public class AddressDetails {

    private String buildName;
    private double buildNum;
    private String streetName;
    private String city;
    private String postCode;
    private String country;

    public AddressDetails() {

    }

    public String getBuildName() {
        return buildName;
    }

    public void setBuildName(String buildName) {
        this.buildName = buildName;
    }

    public double getBuildNum() {
        return buildNum;
    }

    public void setBuildNum(double buildNum) {
        this.buildNum = buildNum;
    }

    public String getStreetName() {
        return streetName;
    }

    public void setStreetName(String streetName) {
        this.streetName = streetName;
    }

    public String getCity() {
        return city;
    }

    public void setCity(String city) {
        this.city = city;
    }

    public String getPostCode() {
        return postCode;
    }

    public void setPostCode(String postCode) {
        this.postCode = postCode;
    }

    public String getCountry() {
        return country;
    }

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

Это программа чтения Excel, которая добавляет адреса из файла Excel в ArrayList:

public class ReadExcel {  

public static List<AddressDetails> readExcel() {

    List<AddressDetails> addressList = null;

    try {

        Workbook workbook = WorkbookFactory.create(new FileInputStream(FileSelector.getSelectedFile()));

        // Get the first sheet from the excel file
        Sheet sheet = workbook.getSheetAt(0);
        if (sheet != null) {
            addressList = readExcelSheet(sheet);

        }

    } catch (EncryptedDocumentException | IOException | ParseException e) {
        e.printStackTrace();

    }

    if (addressList == null)
        addressList = Collections.emptyList();

    return addressList;

}

private static List<AddressDetails> readExcelSheet(Sheet sheet) throws ParseException {

    Iterator<Row> rowItr = sheet.iterator();
    List<AddressDetails> addressList = new ArrayList<>();

    // Iterate each row in the sheet
    while (rowItr.hasNext()) {
        AddressDetails address = new AddressDetails();
        Row row = rowItr.next();
        // First row is header so skip it
        if (row.getRowNum() <= 2) {
            continue;

        }

        Iterator<Cell> cellItr = row.cellIterator();
        // Iterate each cell in a row
        while (cellItr.hasNext()) {

            Cell cell = cellItr.next();
            int index = cell.getColumnIndex();
            switch (index) {
            case 0:
                address.setBuildName((String) getValueFromCell(cell));
                break;
            case 1:
                address.setBuildNum((double) getValueFromCell(cell));
                break;
            case 2:
                address.setStreetName((String) getValueFromCell(cell));
                break;
            case 3:
                address.setCity((String) getValueFromCell(cell));
                break;
            case 4:
                address.setPostCode((String) getValueFromCell(cell));
                break;
            case 5:
                address.setCountry((String) getValueFromCell(cell));
                break;

            }

        }

        addressList.add(address);

    }

    return addressList;

}

// Method to get cell value based on cell type
private static Object getValueFromCell(Cell cell) {
    switch (cell.getCellType()) {
    case STRING:
        return cell.getStringCellValue();

    case NUMERIC:
        return cell.getNumericCellValue();

    case BLANK:
        return "";
    default:
        return "";

    }

}

}

Answer 1

Ваш addressList должен быть List<AddressDetails> вместо одного AddressDetails.

import java.util.*;
import javafx.application.Application;
import javafx.collections.*;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;

public class AddressView extends Application {
    private static final String APPLICATION_TITLE = "Address List";

    public static final List<Column<?>> COLUMNS = new ArrayList<>(Arrays.asList(
        new Column<String>(String.class, "buildName", "Building Name"),
        new Column<Double>(Double.class, "buildNum", "Building Number"),
        new Column<String>(String.class, "streetName", "Street Name"),
        new Column<String>(String.class, "city", "City"),
        new Column<String>(String.class, "postCode", "Postcode"),
        new Column<String>(String.class, "country", "Country")
    ));

    private static List<AddressDetails> ADDRESS_LIST = new ArrayList<>(Arrays.asList(
        new AddressDetails("Building A", 1, "Street 1", "City X", "10101", "USA"),
        new AddressDetails("Building B", 2, "Street 2", "City Y", "02020", "USA"),
        new AddressDetails("Building C", 3, "Street 3", "City X", "30303", "USA"),
        new AddressDetails("Building D", 4, "Street 4", "City Y", "04040", "USA"),
        new AddressDetails("Building E", 5, "Street 5", "City X", "50505", "USA")
    ));

    @Override
    public void start(Stage primaryStage) throws Exception {
        StackPane root = new StackPane();
        TableView<AddressDetails> table = createTable(COLUMNS, ADDRESS_LIST);
        root.getChildren().add(table);
        primaryStage.setTitle(APPLICATION_TITLE);
        primaryStage.setScene(new Scene(root, 500, 200));
        primaryStage.show();
    }

    private <E> TableView<E> createTable(List<Column<?>> columns, List<E> data) {
        TableView<E> table = new TableView<>();
        ObservableList<E> addresses = FXCollections.observableArrayList(data);
        for (Column<?> column : columns) {
            table.getColumns().add(createColumn(column));
        }

        table.setItems(addresses);
        return table;
    }

    private <E, C> TableColumn<E, C> createColumn(Column<?> column, C type) {
        TableColumn<E, C> tableColumn = new TableColumn<E, C>(column.getTitle());
        tableColumn.setCellValueFactory(new PropertyValueFactory<E, C>(column.getFieldName()));
        return tableColumn;
    }

    private <E> TableColumn<E, ?> createColumn(Column<?> column) {
        switch (column.getType().getCanonicalName()) {
            case "java.lang.Integer":
                return createColumn(column, Integer.class);
            case "java.lang.Double":
                return createColumn(column, Double.class);
            case "java.lang.String":
            default:
                return createColumn(column, String.class);
        }
    }

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

Я создал класс столбца для хранения данных столбца, чтобы можно было динамически создавать столбцы.

public class Column<T> {
    private Class<T> type;
    private String fieldName;
    private String title;

    public Column(Class<T> type, String fieldName, String title) {
        this.type = type;
        this.fieldName = fieldName;
        this.title = title;
    }

    public Class<T> getType() {
        return type;
    }

    public void setType(Class<T> type) {
        this.type = type;
    }

    public String getFieldName() {
        return fieldName;
    }

    public void setFieldName(String fieldName) {
        this.fieldName = fieldName;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }
}

Также не забудьте создать конструктор поля в AddressDetails.

public AddressDetails(String buildName, double buildNum, String streetName, 
        String city, String postCode, String country) {
    this.buildName = buildName;
    this.buildNum = buildNum;
    this.streetName = streetName;
    this.city = city;
    this.postCode = postCode;
    this.country = country;
}