JavaFX setCellValueFactory方法调用更多次

我已经创建了一个tableView。但是它的setCellValueFactory方法调用两次或多次。它会引起一个bug。这是什么原因呢？下面是我的Person和Controller类

Person.java

public class Person {

private final SimpleStringProperty name;
private final SimpleStringProperty surname;
private final SimpleStringProperty job;
private final BooleanProperty isSelected;

public Person(SimpleStringProperty name, SimpleStringProperty surname, SimpleStringProperty job,
        BooleanProperty isSelected) {
    super();
    this.name = name;
    this.surname = surname;
    this.job = job;
    this.isSelected = isSelected;
}

public SimpleStringProperty getName() {
    return name;
}

public SimpleStringProperty getSurname() {
    return surname;
}

public SimpleStringProperty getJob() {
    return job;
}

public BooleanProperty getIsSelected() {
    return isSelected;
}

}

public class Controller {

@FXML
private final TableView<Person> fxPersonTableView;

@FXML
private final TableColumn<Person, Boolean> fxSelectColumnCheckbox;

@FXML
private final TableColumn<Person, String> fxNameTableColumn;

@FXML
private final TableColumn<Person, String> fxSurnameTableColumn;

@FXML
private final TableColumn<Person, String> fxJobTableColumn;

List<Person> persons;

private void createTableView(){

    fxSelectColumnCheckbox.setCellFactory(CheckBoxTableCell.forTableColumn(fxSelectColumnCheckbox));

    //fxSelectColumnCheckbox.setCellValueFactory(c -> c.getValue().getIsSelected()); I'm using this, but for print wrote below

    fxSelectColumnCheckbox.setCellValueFactory(c -> {

        System.out.println("METHOD: fxSelectColumnCheckbox.setCellValueFactory"); // This is printed two or more times.
        return c.getValue().getIsSelected());

    });

    fxNameTableColumn.setCellValueFactory(c -> persons.get(c).getName());
    fxSurnameTableColumn.setCellValueFactory(c -> persons.get(c).getSurname());
    fxJobTableColumn.setCellValueFactory(c -> persons.get(c).getJob());
    fxPersonTableView.getSelectionModel.setSleectionMode(SelectionMode.MULTIPLE);
    fxPersonTableView.setItems(persons);

}
}

Controller.java

public class Person {

private final SimpleStringProperty name;
private final SimpleStringProperty surname;
private final SimpleStringProperty job;
private final BooleanProperty isSelected;

public Person(SimpleStringProperty name, SimpleStringProperty surname, SimpleStringProperty job,
        BooleanProperty isSelected) {
    super();
    this.name = name;
    this.surname = surname;
    this.job = job;
    this.isSelected = isSelected;
}

public SimpleStringProperty getName() {
    return name;
}

public SimpleStringProperty getSurname() {
    return surname;
}

public SimpleStringProperty getJob() {
    return job;
}

public BooleanProperty getIsSelected() {
    return isSelected;
}

}

public class Controller {

@FXML
private final TableView<Person> fxPersonTableView;

@FXML
private final TableColumn<Person, Boolean> fxSelectColumnCheckbox;

@FXML
private final TableColumn<Person, String> fxNameTableColumn;

@FXML
private final TableColumn<Person, String> fxSurnameTableColumn;

@FXML
private final TableColumn<Person, String> fxJobTableColumn;

List<Person> persons;

private void createTableView(){

    fxSelectColumnCheckbox.setCellFactory(CheckBoxTableCell.forTableColumn(fxSelectColumnCheckbox));

    //fxSelectColumnCheckbox.setCellValueFactory(c -> c.getValue().getIsSelected()); I'm using this, but for print wrote below

    fxSelectColumnCheckbox.setCellValueFactory(c -> {

        System.out.println("METHOD: fxSelectColumnCheckbox.setCellValueFactory"); // This is printed two or more times.
        return c.getValue().getIsSelected());

    });

    fxNameTableColumn.setCellValueFactory(c -> persons.get(c).getName());
    fxSurnameTableColumn.setCellValueFactory(c -> persons.get(c).getSurname());
    fxJobTableColumn.setCellValueFactory(c -> persons.get(c).getJob());
    fxPersonTableView.getSelectionModel.setSleectionMode(SelectionMode.MULTIPLE);
    fxPersonTableView.setItems(persons);

}
}

公共类控制器{
@FXML
私有最终表视图fxPersonTableView；
@FXML
private final TableColumn fxSelectColumnCheckbox；
@FXML
私有最终表列fxNameTableColumn；
@FXML
私有最终TableColumn fxName TableColumn；
@FXML
私有最终表列fxJobTableColumn；
列出人员名单；
私有void createTableView（）{
fxSelectColumnCheckbox.setCellFactory（CheckBoxTableCell.forTableColumn（fxSelectColumnCheckbox））；
//fxSelectColumnCheckbox.setCellValueFactory（c->c.getValue（）.getIsSelected（））；我正在使用它，但用于下面写的打印
fxSelectColumnCheckbox.setCellValueFactory（c->{
System.out.println（“方法：fxSelectColumnCheckbox.setCellValueFactory”）；//这会被打印两次或更多次。
返回c.getValue（）.getIsSelected（））；
});
fxNameTableColumn.setCellValueFactory（c->persons.get（c.getName（））；
fxNameTableColumn.setCellValueFactory（c->persons.get（c.getNames（））；
fxJobTableColumn.setCellValueFactory（c->persons.get（c.getJob（））；
fxPersonTableView.getSelectionModel.setSleectionMode（SelectionMode.MULTIPLE）；
fxPersonTableView.setItems（个人）；
}
}

哪些方法被多次调用？您的

setCellFactory（…）

方法将在每次调用

createTableView（）

时调用一次。setCellValueFactory方法将被多次调用。我调用createTableView（）一次，但它调用setCellValueFactory方法两次。它会打印两次“METHOD:…”，这就是问题所在。每次单元格需要知道要显示的值时，都会调用传递给

setCellFactory

的回调。因此，在开始时，它将为列中的每个非空可见单元格调用一次（必须多次调用它，并将不同的项作为参数传递，以表示不同的行）。随后，如果单元格被重新用于不同的项目（例如，如果用户滚动），则可能会调用它。这是设计的行为，没有办法阻止它；您需要在理解这将发生的情况下编写代码。我理解，谢谢@詹姆斯·奥迪也有同样的问题。请分享解决方案