我正在使用我的模型类的Wrapper从xml文件中提取数据。
模特课程：
private final StringProperty fileSubject;
private final StringProperty fileDate;
private final StringProperty fileRemarks;
public void setFileSubject(String fileSubject){
this.fileSubject.set(fileSubject);
}
public String getFileSubject() {
return fileSubject.get();
}
public StringProperty fileSubjectProperty() {
return fileSubject;
}
public void setFileDate(String fileDate){
this.fileDate.set(fileDate);
}
public String getFileDate() {
return fileDate.get();
}
public StringProperty fileDateProperty() {
return fileDate;
}
public void setFileRemarks(String fileRemarks){
this.fileRemarks.set(fileRemarks);
}
public String getFileRemarks() {
return fileRemarks.get();
}
public StringProperty fileRemarksProperty(){
return fileRemarks;
}
/**
* Default constructor.
*/
public FileModel(){
this(null,null, null);
}
/**
*Constructor with some initial data.
*
*@param
*
*/
public FileModel(String fileSubject, String fileDate, String fileRemarks){
this.fileSubject = new SimpleStringProperty(fileSubject);
this.fileDate = new SimpleStringProperty(fileDate);
this.fileRemarks = new SimpleStringProperty(fileRemarks);
}
}
包装类：
@XmlRootElement(name = "files")
public class FileListWrapper {
private List<FileModel> files;
@XmlElement(name = "file")
public List<FileModel> getFiles() {
return files;
}
public void setFiles(List<FileModel> files) {
this.files = files;
}
}
这就是我解组它的方式：
JAXBContext context = JAXBContext
.newInstance(FileListWrapper.class);
Unmarshaller um = context.createUnmarshaller();
File file = new File("xxxxxxxxxx/xxx/x/xxxx/x.xml");
// Reading XML from the file and unmarshalling.
FileListWrapper wrapper = (FileListWrapper) um.unmarshal(file);
fileData.clear();
fileData.addAll(wrapper.getFiles());
现在我将提取的数据添加到tableview中，如下所示：
@FXML
private void initialize(){
//Initialize the file table with the three columns.
indexColumn = new TableColumn<>("Index");
indexColumn.setCellFactory(col -> {
TableCell<FileModel, Void> cell = new TableCell<>();
cell.textProperty().bind(Bindings.createStringBinding(() -> {
if (cell.isEmpty()) {
return null ;
} else {
return Integer.toString(cell.getIndex());
}
}));
return cell ;
});
fileTable.getColumns().add(0, indexColumn);
fileSubjectColumn.setCellValueFactory(cellData -> cellData.getValue().fileSubjectProperty());
fileDateColumn.setCellValueFactory(cellData -> cellData.getValue().fileDateProperty());
fileTable.getSelectionModel().selectedItemProperty().addListener(
(observable, oldValue, newValue) -> showFileDetails(newValue));
showFileDetails(null);
}
/**
*Is called by the main application to give a reference back to itself.
*
*@param mainApp
*/
public void setMainApp(MainAppClass mainApp){
this.mainApp = mainApp;
FilteredList<FileModel> filteredData = new FilteredList<>(mainApp.getFileData(), p -> true);
// 2. Set the filter Predicate whenever the filter changes.
filterField.textProperty().addListener((observable, oldValue, newValue) -> {
filteredData.setPredicate(files -> {
// If filter text is empty, display all files.
if (newValue == null || newValue.isEmpty()) {
return true;
}
// Compare File Subject and Date of every file with filter text.
String lowerCaseFilter = newValue.toLowerCase();
if (files.getFileSubject().toLowerCase().indexOf(lowerCaseFilter) != -1) {
return true; // Filter matches Subject.
}
else if (files.getFileDate().toLowerCase().indexOf(lowerCaseFilter) != -1) {
return true; // Filter matches last name.
}
return false; // Does not match.
});
});
// 3. Wrap the FilteredList in a SortedList.
SortedList<FileModel> sortedData = new SortedList<>(filteredData);
// 4. Bind the SortedList comparator to the TableView comparator.
sortedData.comparatorProperty().bind(fileTable.comparatorProperty());
// 5. Add sorted (and filtered) data to the table.
fileTable.setItems(sortedData);
}
现在，indexColumn不会显示任何索引。请帮助我。我尝试了很多东西，但它没有成功。
答案 0 :(得分：2)
如果我理解正确，索引就是表格项目列表中元素的索引。所以你可以做到
TableColumn<FileModel, Void> indexCol = new TableColumn<>("Index");
indexCol.setCellFactory(col -> {
TableCell<FileModel, Void> cell = new TableCell<>();
cell.textProperty().bind(Bindings.createStringBinding(() -> {
if (cell.isEmpty()) {
return null ;
} else {
return Integer.toString(cell.getIndex());
}
}, cell.emptyProperty(), cell.indexProperty()));
return cell ;
});
完整示例（使用标准Oracle教程示例）：
import java.util.function.Function;
import javafx.application.Application;
import javafx.beans.binding.Bindings;
import javafx.beans.binding.StringBinding;
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.property.StringProperty;
import javafx.beans.value.ObservableValue;
import javafx.collections.ListChangeListener.Change;
import javafx.scene.Scene;
import javafx.scene.control.TableCell;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.layout.BorderPane;
import javafx.stage.Stage;
public class TableViewWithIndexColumn extends Application {
@Override
public void start(Stage primaryStage) {
TableView<Person> table = new TableView<>();
table.setEditable(true);
table.getItems().addAll(
new Person("Jacob", "Smith", "jacob.smith@example.com"),
new Person("Isabella", "Johnson",
"isabella.johnson@example.com"),
new Person("Ethan", "Williams", "ethan.williams@example.com"),
new Person("Emma", "Jones", "emma.jones@example.com"),
new Person("Michael", "Brown", "michael.brown@example.com"));
TableColumn<Person, String> firstNameCol = createColumn("First Name",
Person::firstNameProperty, 150);
TableColumn<Person, String> lastNameCol = createColumn("Last Name",
Person::lastNameProperty, 150);
TableColumn<Person, String> emailCol = createColumn("Email",
Person::emailProperty, 150);
// index column doesn't even need data...
TableColumn<Person, Void> indexCol = new TableColumn<>("Index");
indexCol.setPrefWidth(50);
// cell factory to display the index:
indexCol.setCellFactory(col -> {
// just a default table cell:
TableCell<Person, Void> cell = new TableCell<>();
cell.textProperty().bind(Bindings.createStringBinding(() -> {
if (cell.isEmpty()) {
return null ;
} else {
return Integer.toString(cell.getIndex());
}
}, cell.emptyProperty(), cell.indexProperty()));
return cell ;
});
table.getColumns().add(indexCol);
table.getColumns().add(firstNameCol);
table.getColumns().add(lastNameCol);
table.getColumns().add(emailCol);
primaryStage.setScene(new Scene(new BorderPane(table), 600, 400));
primaryStage.show();
}
private <S, T> TableColumn<S, T> createColumn(String title,
Function<S, ObservableValue<T>> property, double width) {
TableColumn<S, T> col = new TableColumn<>(title);
col.setCellValueFactory(cellData -> property.apply(cellData.getValue()));
col.setPrefWidth(width);
return col;
}
public static class Person {
private final StringProperty firstName = new SimpleStringProperty();
private final StringProperty lastName = new SimpleStringProperty();
private final StringProperty email = new SimpleStringProperty();
public Person() {
this("", "", "");
}
public Person(String firstName, String lastName, String email) {
setFirstName(firstName);
setLastName(lastName);
setEmail(email);
}
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 StringProperty emailProperty() {
return this.email;
}
public final java.lang.String getEmail() {
return this.emailProperty().get();
}
public final void setEmail(final java.lang.String email) {
this.emailProperty().set(email);
}
}
public static void main(String[] args) {
launch(args);
}
}