无法将值插入 tableview - JavaFx

Posted 2023-02-26

【中文标题】无法将值插入 tableview - JavaFx

【英文标题】：Unable to insert values into tableview - JavaFx

【发布时间】：2017-09-29 16:35:22

【问题描述】：

我是 JavaFx 的新手，我正在尝试创建一个 tableview，而 fxml 是使用场景构建器创建的。如果我运行该程序，则该表未获取值。我发现这个问题在某种程度上符合我的要求（javaFX 2.2 - Not able to populate table from Controller），但我的代码也符合我的要求。但我仍然无法获取表中的值。

我参考了以下视频：http://www.youtube.com/watch?v=HiZ-glk9_LE

我的代码如下，

MainView.java

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package controller;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Scene;
import javafx.scene.layout.AnchorPane;
import javafx.stage.Stage;

public class MainView extends Application 

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

    @Override
    public void start(Stage primaryStage) throws Exception 
        try 
            AnchorPane page = FXMLLoader.load(MainView.class.getResource("MainView.fxml"));
            Scene scene = new Scene(page);
            primaryStage.setScene(scene);
            primaryStage.setTitle("Sample Window"); 
            primaryStage.setResizable(false); 
            primaryStage.show();
         catch (Exception e) 
        
    

MainView.fxml

<?xml version="1.0" encoding="UTF-8"?>

<?import java.lang.*?>
<?import java.util.*?>
<?import javafx.scene.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>

<AnchorPane id="AnchorPane" prefHeight="400.0" prefWidth="600.0" xmlns:fx="http://javafx.com/fxml" fx:controller="controller.MainViewController">
  <children>
    <SplitPane dividerPositions="0.535175879396985" focusTraversable="true" orientation="VERTICAL" prefHeight="400.0" prefWidth="600.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
      <items>
        <AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="100.0" prefWidth="160.0">
          <children>
            <TableView fx:id="tableID" prefHeight="210.0" prefWidth="598.0" tableMenuButtonVisible="true" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
              <columns>
                <TableColumn minWidth="20.0" prefWidth="40.0" text="ID" fx:id="tID" />
                <TableColumn prefWidth="100.0" text="Date" fx:id="tDate" />
                <TableColumn prefWidth="200.0" text="Name" fx:id="tName" />
                <TableColumn prefWidth="75.0" text="Price" fx:id="tPrice" />
              </columns>
            </TableView>
          </children>
        </AnchorPane>
        <AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="100.0" prefWidth="160.0" />
      </items>
    </SplitPane>
  </children>
</AnchorPane>

MainViewController.java

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package controller;

import java.net.URL;
import java.util.ResourceBundle;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.control.cell.PropertyValueFactory;
import model.Table;

/**
 * FXML Controller class
 *
 */
public class MainViewController implements Initializable 

    /**
     * Initializes the controller class.
     */
    @FXML
    TableView<Table> tableID;
    @FXML
    TableColumn<Table, Integer> tID;
    @FXML
    TableColumn<Table, String> tName;
    @FXML
    TableColumn<Table, String> tDate;
    @FXML
    TableColumn<Table, String> tPrice;
    int iNumber = 1;
    ObservableList<Table> data =
            FXCollections.observableArrayList(
            new Table(iNumber++, "Dinesh", "12/02/2013", "20"),
            new Table(iNumber++, "Vignesh", "2/02/2013", "40"),
            new Table(iNumber++, "Satheesh", "1/02/2013", "100"),
            new Table(iNumber++, "Dinesh", "12/02/2013", "16"));

    @Override
    public void initialize(URL url, ResourceBundle rb) 
        // System.out.println("called");

        tID.setCellValueFactory(new PropertyValueFactory<Table, Integer>("rID"));
        tName.setCellValueFactory(new PropertyValueFactory<Table, String>("rName"));
        tDate.setCellValueFactory(new PropertyValueFactory<Table, String>("rDate"));
        tPrice.setCellValueFactory(new PropertyValueFactory<Table, String>("rPrice"));
        tableID.setItems(data);

    

Table.java

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package model;

import javafx.beans.property.SimpleIntegerProperty;
import javafx.beans.property.SimpleStringProperty;


public class Table 

    SimpleIntegerProperty rID;
    SimpleStringProperty rName;
    SimpleStringProperty rDate;
    SimpleStringProperty rPrice;

    public Table(int rID, String rName, String rDate, String rPrice) 
        this.rID = new SimpleIntegerProperty(rID);
        this.rName = new SimpleStringProperty(rName);
        this.rDate = new SimpleStringProperty(rDate);
        this.rPrice = new SimpleStringProperty(rPrice);
        System.out.println(rID);
        System.out.println(rName);
        System.out.println(rDate);
        System.out.println(rPrice);
     

    public Integer getrID() 
        return rID.get();
    

    public void setrID(Integer v) 
        this.rID.set(v);
    

    public String getrDate() 
        return rDate.get();
    

    public void setrDate(String d) 
        this.rDate.set(d);
    

    public String getrName() 
        return rName.get();
    

    public void setrName(String n) 
         this.rDate.set(n);
    

    public String getrPrice() 
        return rPrice.get();
    

    public void setrPrice(String p) 
       this.rPrice.set(p); 
    

提前致谢。

【参考方案1】：

在 Table.java 中更改所有 getter 和 setter 名称， 将 getr* 更改为 getR* 将 setr* 更改为 setR*

【参考方案2】：

感谢@Uluk Biy。无论他提到什么，都需要更改，我发现我错过了 FXML 文件中每一列的<TableColumn> 标记下的<cellValueFactory> 和<PropertyValueFactory> 标记，如下所示，

<TableColumn minWidth="20.0" prefWidth="40.0" text="ID" fx:id="tID" >
 <cellValueFactory>
    <PropertyValueFactory property="tID" />
  </cellValueFactory>
</TableColumn>

与此类似，所有列都需要这样更新。

进行此更改后，代码运行正常。我能够将值添加到行中。 :)