JavaFX 更新 table

Question

我想在数据库中更新该行后更新 table 视图。

产品负责人：-

package Controllers;

import CustomObjects.Product;
import Models.ProductModel;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.fxml.Initializable;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.stage.Stage;

import java.net.URL;
import java.util.ArrayList;
import java.util.Optional;
import java.util.ResourceBundle;

public class ProductController implements Initializable {

    @FXML
    private TableView<Product> table;

    @FXML
    private Button addProductBtn;

    @FXML
    private Button editProductBtn;

    @FXML
    private Button deleteProductBtn;

    @FXML
    private TableColumn<Product, String> col_name;

    @FXML
    private TableColumn<Product, String> col_brand;

    @FXML
    private TableColumn<Product, String> col_type;
    @FXML
    private TableColumn<Product, Integer> col_price;

    public ObservableList<Product> productList = FXCollections.observableArrayList();



    @Override
    public void initialize(URL location, ResourceBundle resources) {
        ProductModel productModel = new ProductModel();
        ArrayList<Product> products = productModel.getProducts();
        int size = products.size();

        for (Product product : products) {
            productList.add(product);
            System.out.println(product.getName());
        }
        col_name.setCellValueFactory(new PropertyValueFactory<>("name"));
        col_brand.setCellValueFactory(new PropertyValueFactory<>("brand"));
        col_price.setCellValueFactory(new PropertyValueFactory<>("price"));
        col_type.setCellValueFactory(new PropertyValueFactory<>("type"));
        table.setItems(productList);
    }

    public void addProduct() throws Exception {
        try {
            FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("/Views/addProduct.fxml"));
            Parent root = (Parent) fxmlLoader.load();
            Stage stage = new Stage();
            stage.setScene(new Scene(root));
            stage.setTitle("Add new Product");
            stage.show();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }


    public void editProduct() throws Exception {
        try {
            Product p = table.getSelectionModel().getSelectedItem();
            System.out.println(p.getProduct_id());
            FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("/Views/editProduct.fxml"));
            Parent root = (Parent) fxmlLoader.load();
            Stage stage = new Stage();
            Scene scene = new Scene(root);
            stage.setScene(scene);
            EditProductController controller = fxmlLoader.<EditProductController>getController();
            controller.initData(p, scene , table);
            stage.setTitle("Edit product");
            stage.show();
        } catch (Exception e) {
            e.printStackTrace();
        }

    }

    public void modifyTableRow(){
        System.out.println("Method called !");
        ProductModel productModel = new ProductModel();
        ArrayList<Product> products = productModel.getProducts();
        int size = products.size();

        for (Product product : products) {
            productList.add(product);
            System.out.println(product.getName());
        }
        col_name.setCellValueFactory(new PropertyValueFactory<>("name"));
        col_brand.setCellValueFactory(new PropertyValueFactory<>("brand"));
        col_price.setCellValueFactory(new PropertyValueFactory<>("price"));
        col_type.setCellValueFactory(new PropertyValueFactory<>("type"));
        table.setItems(productList);

    }

    public void deleteProduct() throws Exception {
        Product p = table.getSelectionModel().getSelectedItem();
        if (p == null) {
            Alert q = new Alert(Alert.AlertType.WARNING);
            q.setTitle("Delete a product");
            q.setContentText("Select a product ");
            q.show();
        } else {

            Alert alert = new Alert(Alert.AlertType.CONFIRMATION);
            alert.setTitle("Delete a product");
            alert.setContentText("Do you want to delete this product ?");

            Optional<ButtonType> result = alert.showAndWait();
            if (result.get() == ButtonType.OK) {
                table.getItems().remove(p);
                ProductModel model = new ProductModel();
                model.deleteProduct(p.getProduct_id());
            }
        }


    }
}

此控制器从数据库中提取数据并将其显示在 table 中。在这个 editProductBtn 单击另一个与弹出相关的场景之后。它包含在用户单击编辑产品按钮之前 table 中与所选行相关的所有数据。

编辑产品控制器：-

package Controllers;

import CustomObjects.Product;
import Models.ProductModel;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.Scene;
import javafx.scene.control.Alert;
import javafx.scene.control.Button;
import javafx.scene.control.TableView;
import javafx.scene.control.TextField;

import java.net.URL;
import java.util.ResourceBundle;

public class EditProductController implements Initializable {

    private int productId;
    private Scene currentScene;
    private TableView<Product> table;
    private Product product;

    @FXML
    private Button addProductBtn;

    @FXML
    private Button testBtn;

    @FXML
    private TextField nameTextBox;

    @FXML
    private TextField priceTextBox;

    @FXML
    private TextField typeTextBox;

    @FXML
    private TextField brandTextBox;

    @Override
    public void initialize(URL location, ResourceBundle resources) {

    }


    void initData(Product product, Scene scene, TableView<Product> table) {
        if (product == null) {
            Alert q = new Alert(Alert.AlertType.WARNING);
            q.setTitle("Delete a product");
            q.setContentText("Select a product ");
            q.show();
        } else {

            product = product;
            productId = product.getProduct_id();
            nameTextBox.setText(product.getName());
            priceTextBox.setText(String.valueOf(product.getPrice()));
            typeTextBox.setText(product.getType());
            brandTextBox.setText(product.getBrand());
            currentScene = scene;
        }
    }

    public void updateProduct() {

        String name = nameTextBox.getText();
        Integer price = Integer.valueOf(priceTextBox.getText());
        String brand = brandTextBox.getText();
        String type = typeTextBox.getText();
        ProductModel productModel = new ProductModel();
        productModel.updateProduct(productId, name, brand, type, price);

    }

    public void callMainMethod(){
        ProductController pc  = new ProductController();
        pc.modifyTableRow();
        table.refresh();
    }

}

这可以更改数据库中的数据，但不能更改 table 中的数据。我在这里和那里尝试了一些技巧，但它给了我一些与线程相关的错误。我是 javaFx 的初学者。如果你能 post 一些详细的答案，我将非常感谢你谢谢！

Answer 1

您可以使用Platform.runLater()方法来避免线程问题

并更新 table 我可以看到两种方式：

您可以在 updateProduct() 方法中修改 table 中的行，因为您在 EditProductController class

中收到 Table

或者您可以再次从数据库中加载所有数据

JavaFX 更新 table

JavaFX update table

java

user-interface

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fxml

java-deployment-toolkit