导入excel到tableview（javafx）
当最终用户从Excel中复制数据并将其粘贴到tableview上时，我想要一个tableview来获取值。
我想知道最好的方法，所以现在没有任何代码发布…我想使用Clipboard类，手动添加内容从剪贴板到表…
-
这是正确的做法吗？
-
如果不。 怎么做？
-
有没有任何方法或类已经实现了这一点
function..？
你可以这样做。 但是您需要调整代码以符合您的要求（例如数字格式等）。
TableCopyPasteCellsDemo.java
import javafx.application.Application; import javafx.beans.property.IntegerProperty; import javafx.beans.property.SimpleIntegerProperty; import javafx.beans.property.SimpleStringProperty; import javafx.beans.property.StringProperty; import javafx.collections.FXCollections; import javafx.collections.ObservableList; import javafx.geometry.Insets; import javafx.scene.Scene; import javafx.scene.control.Label; import javafx.scene.control.SelectionMode; import javafx.scene.control.TableColumn; import javafx.scene.control.TableView; import javafx.scene.control.cell.PropertyValueFactory; import javafx.scene.layout.BorderPane; import javafx.scene.layout.VBox; import javafx.scene.text.Text; import javafx.stage.Stage; public class TableCopyPasteCellsDemo extends Application { private final ObservableList<Person> data = FXCollections.observableArrayList(new Person("Jacob", "Smith", 18), new Person("Isabella", "Johnson", 19), new Person("Ethan", "Williams", 20), new Person("Michael", "Brown", 21)); public static void main(String[] args) { launch(args); } @Override public void start(Stage stage) { stage.setWidth(500); stage.setHeight(550); // create table columns TableColumn<Person, String> firstNameCol = new TableColumn<Person, String>("First Name"); firstNameCol.setMinWidth(100); firstNameCol.setCellValueFactory(new PropertyValueFactory<Person, String>("firstName")); TableColumn<Person, String> lastNameCol = new TableColumn<Person, String>("Last Name"); lastNameCol.setMinWidth(100); lastNameCol.setCellValueFactory(new PropertyValueFactory<Person, String>("lastName")); TableColumn<Person, Integer> ageCol = new TableColumn<Person, Integer>("Age"); ageCol.setMinWidth(60); ageCol.setCellValueFactory(new PropertyValueFactory<Person, Integer>("age")); TableView<Person> table = new TableView<>(); table.setPlaceholder(new Text("No content in table")); table.setItems(data); table.getColumns().addAll(firstNameCol, lastNameCol, ageCol); final VBox vbox = new VBox(); vbox.setSpacing(5); vbox.setPadding(new Insets(10, 10, 10, 10)); BorderPane borderPane = new BorderPane(); borderPane.setCenter(table); vbox.getChildren().addAll(borderPane); vbox.getChildren().add( new Label( "Select cells and press CTRL+C. Paste the data into Excel or Notepad")); Scene scene = new Scene(vbox); stage.setScene(scene); stage.show(); // enable multi-selection table.getSelectionModel().setCellSelectionEnabled(true); table.getSelectionModel().setSelectionMode(SelectionMode.MULTIPLE); // enable copy/paste TableUtils.installCopyPasteHandler(table); } public static class Person { private final StringProperty firstName; private final StringProperty lastName; private final IntegerProperty age; private Person(String fName, String lName, Integer age) { this.firstName = new SimpleStringProperty(fName); this.lastName = new SimpleStringProperty(lName); this.age = new SimpleIntegerProperty(age); } public final StringProperty firstNameProperty() { return this.firstName; } public final java.lang.String getFirstName() { return this.firstNameProperty().get(); } public final void setFirstName(final java.lang.String firstName) { this.firstNameProperty().set(firstName); } public final StringProperty lastNameProperty() { return this.lastName; } public final java.lang.String getLastName() { return this.lastNameProperty().get(); } public final void setLastName(final java.lang.String lastName) { this.lastNameProperty().set(lastName); } public final IntegerProperty ageProperty() { return this.age; } public final int getAge() { return this.ageProperty().get(); } public final void setAge(final int age) { this.ageProperty().set(age); } } }
TableUtils.java
import java.text.NumberFormat; import java.text.ParseException; import java.util.StringTokenizer; import javafx.beans.property.DoubleProperty; import javafx.beans.property.IntegerProperty; import javafx.beans.property.StringProperty; import javafx.beans.value.ObservableValue; import javafx.collections.ObservableList; import javafx.event.EventHandler; import javafx.scene.control.TableColumn; import javafx.scene.control.TablePosition; import javafx.scene.control.TableView; import javafx.scene.input.Clipboard; import javafx.scene.input.ClipboardContent; import javafx.scene.input.KeyCode; import javafx.scene.input.KeyCodeCombination; import javafx.scene.input.KeyCombination; import javafx.scene.input.KeyEvent; public class TableUtils { private static NumberFormat numberFormatter = NumberFormat.getNumberInstance(); /** * Install the keyboard handler: * + CTRL + C = copy to clipboard * + CTRL + V = paste to clipboard * @param table */ public static void installCopyPasteHandler(TableView<?> table) { // install copy/paste keyboard handler table.setOnKeyPressed(new TableKeyEventHandler()); } /** * Copy/Paste keyboard event handler. * The handler uses the keyEvent's source for the clipboard data. The source must be of type TableView. */ public static class TableKeyEventHandler implements EventHandler<KeyEvent> { KeyCodeCombination copyKeyCodeCompination = new KeyCodeCombination(KeyCode.C, KeyCombination.CONTROL_ANY); KeyCodeCombination pasteKeyCodeCompination = new KeyCodeCombination(KeyCode.V, KeyCombination.CONTROL_ANY); public void handle(final KeyEvent keyEvent) { if (copyKeyCodeCompination.match(keyEvent)) { if( keyEvent.getSource() instanceof TableView) { // copy to clipboard copySelectionToClipboard( (TableView<?>) keyEvent.getSource()); // event is handled, consume it keyEvent.consume(); } } else if (pasteKeyCodeCompination.match(keyEvent)) { if( keyEvent.getSource() instanceof TableView) { // copy to clipboard pasteFromClipboard( (TableView<?>) keyEvent.getSource()); // event is handled, consume it keyEvent.consume(); } } } } /** * Get table selection and copy it to the clipboard. * @param table */ public static void copySelectionToClipboard(TableView<?> table) { StringBuilder clipboardString = new StringBuilder(); ObservableList<TablePosition> positionList = table.getSelectionModel().getSelectedCells(); int prevRow = -1; for (TablePosition position : positionList) { int row = position.getRow(); int col = position.getColumn(); // determine whether we advance in a row (tab) or a column // (newline). if (prevRow == row) { clipboardString.append('\t'); } else if (prevRow != -1) { clipboardString.append('\n'); } // create string from cell String text = ""; Object observableValue = (Object) table.getColumns().get(col).getCellObservableValue( row); // null-check: provide empty string for nulls if (observableValue == null) { text = ""; } else if( observableValue instanceof DoubleProperty) { // TODO: handle boolean etc text = numberFormatter.format( ((DoubleProperty) observableValue).get()); } else if( observableValue instanceof IntegerProperty) { text = numberFormatter.format( ((IntegerProperty) observableValue).get()); } else if( observableValue instanceof StringProperty) { text = ((StringProperty) observableValue).get(); } else { System.out.println("Unsupported observable value: " + observableValue); } // add new item to clipboard clipboardString.append(text); // remember previous prevRow = row; } // create clipboard content final ClipboardContent clipboardContent = new ClipboardContent(); clipboardContent.putString(clipboardString.toString()); // set clipboard content Clipboard.getSystemClipboard().setContent(clipboardContent); } public static void pasteFromClipboard( TableView<?> table) { // abort if there's not cell selected to start with if( table.getSelectionModel().getSelectedCells().size() == 0) { return; } // get the cell position to start with TablePosition pasteCellPosition = table.getSelectionModel().getSelectedCells().get(0); System.out.println("Pasting into cell " + pasteCellPosition); String pasteString = Clipboard.getSystemClipboard().getString(); System.out.println(pasteString); int rowClipboard = -1; StringTokenizer rowTokenizer = new StringTokenizer( pasteString, "\n"); while( rowTokenizer.hasMoreTokens()) { rowClipboard++; String rowString = rowTokenizer.nextToken(); StringTokenizer columnTokenizer = new StringTokenizer( rowString, "\t"); int colClipboard = -1; while( columnTokenizer.hasMoreTokens()) { colClipboard++; // get next cell data from clipboard String clipboardCellContent = columnTokenizer.nextToken(); // calculate the position in the table cell int rowTable = pasteCellPosition.getRow() + rowClipboard; int colTable = pasteCellPosition.getColumn() + colClipboard; // skip if we reached the end of the table if( rowTable >= table.getItems().size()) { continue; } if( colTable >= table.getColumns().size()) { continue; } // System.out.println( rowClipboard + "/" + colClipboard + ": " + cell); // get cell TableColumn tableColumn = table.getColumns().get(colTable); ObservableValue observableValue = tableColumn.getCellObservableValue(rowTable); System.out.println( rowTable + "/" + colTable + ": " +observableValue); // TODO: handle boolean, etc if( observableValue instanceof DoubleProperty) { try { double value = numberFormatter.parse(clipboardCellContent).doubleValue(); ((DoubleProperty) observableValue).set(value); } catch (ParseException e) { e.printStackTrace(); } } else if( observableValue instanceof IntegerProperty) { try { int value = NumberFormat.getInstance().parse(clipboardCellContent).intValue(); ((IntegerProperty) observableValue).set(value); } catch (ParseException e) { e.printStackTrace(); } } else if( observableValue instanceof StringProperty) { ((StringProperty) observableValue).set(clipboardCellContent); } else { System.out.println("Unsupported observable value: " + observableValue); } System.out.println(rowTable + "/" + colTable); } } } }