如何提高JavaFx MySQL应用程序的性能

在我的JavaFx应用程序中，当单击一个按钮并在表中显示列表时，我正在加载一个ObservableList

控制器代码：

 @FXML
   private void initialize() throws SQLException, ParseException, ClassNotFoundException {

    searchChoice.setItems(criteriaList);
    searchChoice.getSelectionModel().selectFirst();
    productIdColumn.setCellValueFactory(cellData -> cellData.getValue().productIdProperty());
    unitColumn.setCellValueFactory(cellData -> cellData.getValue().unitProperty());
    productTitleColumn.setCellValueFactory(cellData -> cellData.getValue().titleProperty());
    productTypeColumn.setCellValueFactory(cellData -> cellData.getValue().typeProperty());
    productUnitPriceColumn.setCellValueFactory(cellData -> Bindings.format("%.2f", cellData.getValue().unitPriceProperty().asObject()));
    productQuantityColumn.setCellValueFactory(cellData -> cellData.getValue().quantityProperty().asObject());
    productStatusColumn.setCellValueFactory(cellData -> cellData.getValue().productStatusProperty());
    descriptionColumn.setCellValueFactory(cellData -> cellData.getValue().descriptionProperty());
    reorderPointColumn.setCellValueFactory(cellData -> cellData.getValue().reOrderPointProperty().asObject());
    surplusPointColumn.setCellValueFactory(cellData -> cellData.getValue().surplusPointProperty().asObject());
    productIdColumn.setSortType(TableColumn.SortType.DESCENDING);
    productTable.getSortOrder().add(productIdColumn);

    productTable.setRowFactory(tv -> new TableRow<Product>() {
        @Override
        public void updateItem(Product item, boolean empty) {
            super.updateItem(item, empty);
            if (item == null) {
                setStyle("");
            } else if (item.getQuantity() < item.getReOrderPoint()) {
                setStyle("-fx-background-color: tomato;");
            }  else if (item.getQuantity() > item.getSurplusPoint()) {
                setStyle("-fx-background-color: darkorange;");
            } else {
                setStyle("-fx-background-color: skyblue;");
            }
        }
    });

    try {
        ObservableList<Product> productData = ProductDAO.searchProducts();
        populateProducts(productData);
        String[] expireDate = new String[productData.size()];
        String[] id = new String[productData.size()];
        String[] existingStatus = new String[productData.size()];
        for (int i = 0; i < productData.size(); i++) {
            expireDate[i] = productData.get(i).getExpireDate();
            id[i] = productData.get(i).getProductId();
            existingStatus[i] = productData.get(i).getProductStatus();
            DateFormat format = new SimpleDateFormat(app.values.getProperty("DATE_FORMAT_PATTERN"), Locale.ENGLISH);
            Date expireDateString = format.parse(expireDate[i]);
            Date in = new Date();
            LocalDateTime ldt = LocalDateTime.ofInstant(in.toInstant(), ZoneId.systemDefault());
            Date today = Date.from(ldt.atZone(ZoneId.systemDefault()).toInstant());
            if (expireDateString.before(today) && !existingStatus[i].equals(app.values.getProperty("STATUS_TYPE2"))) {
                ProductDAO.updateProductStatus(id[i], app.values.getProperty("STATUS_TYPE3"));
            }
            if (expireDateString.after(today) && !existingStatus[i].equals(app.values.getProperty("STATUS_TYPE2"))) {
                ProductDAO.updateProductStatus(id[i], app.values.getProperty("STATUS_TYPE1"));
            }
        }
        ObservableList<Product> productDataRefreshed = ProductDAO.searchProducts();
        populateProducts(productDataRefreshed);

        ObservableList<Product> productCodesData = ProductDAO.getProductCodes();
        ObservableList<Product> productTitlesData = ProductDAO.getProductTitles();
        ObservableList<Product> productTypesData = ProductDAO.getProductTypes();
        ObservableList<Product> productStatusData = ProductDAO.getProductStatus();
        String possibleProducts1[] = new String[productCodesData.size()];
        for (int k = 0; k < productCodesData.size(); k++) {
            possibleProducts1[k] = productCodesData.get(k).getProductId();
        }
        String possibleProducts2[] = new String[productTitlesData.size()];
        for (int k = 0; k < productTitlesData.size(); k++) {
            possibleProducts2[k] = productTitlesData.get(k).getTitle();
        }
        String possibleProducts3[] = new String[productTypesData.size()];
        for (int k = 0; k < productTypesData.size(); k++) {
            possibleProducts3[k] = productTypesData.get(k).getType();
        }

        String possibleProducts4[] = new String[productStatusData.size()];
        for (int k = 0; k < productStatusData.size(); k++) {
            possibleProducts4[k] = productStatusData.get(k).getProductStatus();
        }

        TextFields.bindAutoCompletion(searchField, possibleProducts1);
        TextFields.bindAutoCompletion(searchField, possibleProducts2);
        TextFields.bindAutoCompletion(searchField, possibleProducts3);
        TextFields.bindAutoCompletion(searchField, possibleProducts4);

    } catch (SQLException e) {
        Alert alert = new Alert(Alert.AlertType.ERROR);
        alert.setTitle(app.values.getProperty("ERROR_TITLE"));
        alert.setHeaderText(app.values.getProperty("FAILURE_MESSAGE"));
        alert.setHeaderText(app.values.getProperty("ERROR_GETTING_INFORMATION_FROM_DATABASE_MESSAGE"));
        alert.showAndWait();
        throw e;
    } catch (ClassNotFoundException e) {
        e.printStackTrace();
    }

}

@FXML
private void initialize（）抛出SQLException、ParseException、ClassNotFoundException{
searchChoice.setItems（标准列表）；
searchChoice.getSelectionModel（）.selectFirst（）；
productIdColumn.setCellValueFactory（cellData->cellData.getValue（）.productIdProperty（））；
unitColumn.setCellValueFactory（cellData->cellData.getValue（）.unitProperty（））；
productTitleColumn.setCellValueFactory（cellData->cellData.getValue（）.titleProperty（））；
productTypeColumn.setCellValueFactory（cellData->cellData.getValue（）.typeProperty（））；
productUnitPriceColumn.setCellValueFactory（cellData->Bindings.format（“%.2f”，cellData.getValue（）.unitPriceProperty（）.asObject（））；
productQuantityColumn.setCellValueFactory（cellData->cellData.getValue（）.quantityProperty（）.asObject（））；
productStatusColumn.setCellValueFactory（cellData->cellData.getValue（）.productStatusProperty（））；
descriptionColumn.setCellValueFactory（cellData->cellData.getValue（）.descriptionProperty（））；
reorderPointColumn.setCellValueFactory（cellData->cellData.getValue（）.reOrderPointProperty（）.asObject（））；
surplusPointColumn.setCellValueFactory（cellData->cellData.getValue（）.surplusPointProperty（）.asObject（））；
productIdColumn.setSortType（TableColumn.SortType.DESCENDING）；
productTable.getSortOrder（）.add（productIdColumn）；
productTable.setRowFactory（电视->新建表格行（）{
@凌驾
public void updateItem（产品项，布尔值为空）{
super.updateItem（项，空）；
如果（项==null）{
设置样式（“”）；
}else if（item.getQuantity（）item.get盈余点（））{
setStyle（“-fx背景色：darkorange；”）；
}否则{
设置样式（“-fx背景色：天蓝色；”）；
}
}
});
试一试{
ObservableList productData=ProductDAO.searchProducts（）；
populateProducts（productData）；
String[]expireDate=新字符串[productData.size（）]；
String[]id=新字符串[productData.size（）]；
String[]existingStatus=新字符串[productData.size（）]；
对于（int i=0；i

服务mysql查询：

  public static ObservableList<Product> searchProducts() throws SQLException, ClassNotFoundException {
    String selectStmt = "SELECT * FROM product";
    ResultSet rsPrdcts = DbUtil.dbExecuteQuery(selectStmt);
    ObservableList<Product> productList = getProductList(rsPrdcts);
    return productList;
}

public static observeList searchProducts（）抛出SQLException、ClassNotFoundException{
String selectStmt=“选择*来自产品”；
ResultSet rsPrdcts=DbUtil.dbExecuteQuery（selectStmt）；
ObservableList productList=getProductList（rsPrdcts）；
返回产品列表；
}

这里的问题是，当有更多

SELECT count(*) FROM product

int numItems = 30;
int offset = idx - (idx % numItems)
SELECT * FROM product LIMIT offset, numItems