TableView JavaFx APP中的空白行 [英] blank Row in TableView JavaFx APP

问题描述

我想在我的javafx应用程序中使用tableview，但它在tableview中给我空行.....
这是示例输出：

i am trying to use tableview in my javafx app but it's giving me blank rows in tableview..... Here is sample output :

以下是模型类的代码：

public class Pizza {
    private final SimpleStringProperty pname;
    private final SimpleStringProperty pflavour;
    private final SimpleStringProperty psize;
    private final SimpleDoubleProperty pprice;
    public Pizza(String name, String flavour, String size, Double price) {
        super();
        this.pname = new SimpleStringProperty(name);
        this.pflavour = new SimpleStringProperty( flavour);
        this.psize = new SimpleStringProperty(size);
        this.pprice = new SimpleDoubleProperty(price);
    }
    public String getName() {
        return pname.get();
    }
    public String getFlavour() {
        return pflavour.get();
    }
    public String getSize() {
        return psize.get();
    }
    public Double getPrice() {
        return pprice.get();
    }

}

以下是控制器类的代码：

Here is the code for controller class :

        @FXML
        private TableView<Pizza> pizzatable;
        @FXML
        private TableColumn<Pizza,String> pname;
        @FXML
        private TableColumn<Pizza,String> pflavour;
        @FXML
        private TableColumn<Pizza,String> psize;
        @FXML
        private TableColumn<Pizza,Double> pprice;
        ObservableList<Pizza> pizzalist;

这是我调用从数据库中获取数据的方法的代码：

Here is the code for method that i call to fetch data from databse:

public void fetchpizza() throws SQLException{
        stmt = conn.createStatement();
        sql = "select * from items where itype = 'Pizza'";
        rs = stmt.executeQuery(sql);
        pname.setCellValueFactory(new PropertyValueFactory<Pizza,String>("pname"));
        pflavour.setCellValueFactory(new PropertyValueFactory<Pizza,String>("pflavour"));
        psize.setCellValueFactory(new PropertyValueFactory<Pizza,String>("psize"));
        pprice.setCellValueFactory(new PropertyValueFactory<Pizza,Double>("pprice"));
        pizzalist = FXCollections.observableArrayList();
        while(rs.next()){
            pizzalist.add(new Pizza(rs.getString("oname"),rs.getString("flavour"),rs.getString("size"),rs.getDouble("price")));
            pizzatable.setItems(pizzalist);
        }
        rs.close();
        stmt.close();
    }

推荐答案

你需要使用 String s对应于getter或属性getter作为 PropertyValueFactory 构造函数的参数。

You need to use the Strings corresponding to the getters or property getters as argument for the PropertyValueFactory constructor.

例如如果将name作为参数传递给 PropertyValueFactory<的构造函数，则将使用以下方法之一检索值/属性; Pizza，String> ：

E.g. one of the following methods of the items would be used to retrieve the value/property, if you pass "name" as parameter to the constructor of PropertyValueFactory<Pizza, String>:

• nameProperty（）（应该返回 StringProperty ）。这允许观察值的变化而无需调用 TableView.refresh（）。


• getName（ ）（应该返回字符串）

• nameProperty() (should return StringProperty). This allows to observe changes in the value without having to call TableView.refresh().
• getName() (should return String)

你但是传递字段的名称。由于方法名称不会进行所需的模式，因此 TableCell 仍为空。

You pass the name of the fields however. Since the method names do not march the required pattern, the TableCells remain empty.

这篇关于TableView JavaFx APP中的空白行的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！