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我正在开发一个 JavaFx 应用程序,我必须对几个模型类使用 CRUD。我想创建一个通用接口,然后想为这些类实现。我找不到任何使用 JavaFX 实现的示例。我没有使用 DAO 或 Hibernate,它只是 JDBC 连接。

到目前为止我做了什么

public interface CrudInterface<T, PK extends Serializable> {
    void create(T t);
    T read(PK id);
    void update(T t);
    void delete(T t);
    ObservableList<T> getAll();
}

执行:

    public class ProductImplementation implements CrudInterface, ProductInterface{

    //Other Methods
.
.
.
        @Override
            public void create(Product product) {
                try {
                    DatabaseConnection localConnection = new DatabaseConnection();
                    connection = localConnection.getLocalConnection();
                    connection.setAutoCommit(false);
                    String query = "INSERT INTO products (product_name, bar_code, product_size, product_cost, product_net_dealer_price, productQuantity, product_alert_quantity, product_tax, product_image, product_invoice_detail, product_category_id, product_subcategory_id, suplier_name) VALUES  (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)";
                    preparedStatement = connection.prepareStatement(query);
                    preparedStatement.setString(1, product.getName());
                    preparedStatement.setString(2, product.getBarcode());
                    preparedStatement.setString(3, product.getSize());
                    preparedStatement.setInt(4, product.getPrice());
                    preparedStatement.setString(5, product.getNetDealerPrice());
                    preparedStatement.setInt(6, product.getQuantity());
                    preparedStatement.setInt(7, product.getAlertQuantity());
                    preparedStatement.setInt(8, product.getTax());
                    preparedStatement.setString(9, product.getImage());
                    preparedStatement.setString(10, product.getProductInvoiceDetail());
        //            preparedStatement.setInt(11, product.getCategories().getCategoryID());
        //            preparedStatement.setInt(12, product.getSubCategories().getSubCategoryID());
        //            preparedStatement.setInt(13, product.getSuppliers().getSupplierID());
                    preparedStatement.execute();
                    connection.commit();
                } catch (SQLException e) {
                    try {
                        connection.rollback();
                    } catch (SQLException ex) {
                        Logger.getLogger(ProductImplementation.class.getName()).log(Level.SEVERE, null, ex);
                    }
                    Logger.getLogger(ProductImplementation.class.getName()).log(Level.SEVERE, null, e);
                } finally {
                    try {
                        connection.close();
                        preparedStatement.close();
                    } catch (SQLException ex) {
                        Logger.getLogger(ProductImplementation.class.getName()).log(Level.SEVERE, null, ex);
                    }
                }
            }
        }

我被卡住了,无法通过模型类的对象来创建数据。任何帮助或建议将不胜感激。

谢谢

我在 CRUD 界面中创建方法的编辑 签名是

void create(T t);

现在我需要T在实现接口时用我的模型类替换。即Product,等Category_SubCategory

我有几个带有 CRUD 的类,我不想在每个 Java 类中分别重复这些方法,因此我需要创建一个通用接口

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0 回答 0