我想在我点击第一个按钮时加载inventory_layout但是我在那里得到加载异常，而相同的代码与其他fxml一起工作正常。
控制器的路径是对的。 fxml在正确的位置。
这是我的代码 - 库存
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.scene.Scene;
import javafx.scene.layout.AnchorPane;
import javafx.scene.layout.Border;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.Pane;
import javafx.stage.Modality;
import javafx.stage.Stage;
import pharmbooks.Utils.DbSingleton;
import pharmbooks.Utils.UIController;
import java.io.IOException;
public class MainController {
@FXML
private BorderPane borderPane;
@FXML
public void initInventory(ActionEvent actionEvent) throws IOException{
UIController<InventoryController> uiController=new UIController<InventoryController>();
uiController.setUp(borderPane,"inventory_layout.fxml");
}
public void initPurchase(ActionEvent actionEvent) throws IOException{
UIController<PurchaseController> uiController=new UIController<>();
uiController.setUp(borderPane,"purchase_layout.fxml");
}
}
Ui控制器
public class UIController<T> {
private T controller;
private Pane pane;
public T getController() {
return controller;
}
public void setUp(Pane mainPane,String fxmlLocation){
try {
FXMLLoader loader = new FXMLLoader();
loader.setLocation(getClass().getClassLoader().getResource(fxmlLocation));
pane = loader.load();
controller = loader.getController();
mainPane.getChildren().clear();
mainPane.getChildren().add(pane);
}catch (Exception e){
System.out.println(UIController.class.getSimpleName()+" "+e.toString());
}
} }
此代码在ubuntu中运行良好：/
这是错误：
UIController javafx.fxml.LoadException： /Users/manyamadan/Desktop/Everything/pharmbooks-v2/target/classes/inventory_layout.fxml
库存控制器：
公共类InventoryController实现Initializable {
public TableColumn batchId;
public TableColumn company;
public TableColumn name;
public TableColumn packing;
public TableColumn quantity;
public TableColumn expiry;
public TableColumn mrp;
@FXML
private TableView<Inventory> personTable;
public void InventoryController()
{
}
public void initialize(URL location, ResourceBundle resources) {
batchId.setCellValueFactory(new PropertyValueFactory<Inventory, String>("BATCH_ID"));
company.setCellValueFactory(new PropertyValueFactory<Inventory, String>("COMPANY"));
name.setCellValueFactory(new PropertyValueFactory<Inventory, String>("PRODUCT_NAME"));
packing.setCellValueFactory(new PropertyValueFactory<Inventory, String>("PACKING"));
quantity.setCellValueFactory(new PropertyValueFactory<Inventory, Integer>("QUANTITY"));
expiry.setCellValueFactory(new PropertyValueFactory<Inventory, String>("EXPIRY_DATE"));
mrp.setCellValueFactory(new PropertyValueFactory<Inventory, String>("MRP"));
personTable.setEditable(true);
personTable.setItems(InventoryData.getInstance().getList());
// name.setOnEditCommit(TableColumn.CellEditEvent(Inventory,String)event);
Inventory inventory_data = personTable.getSelectionModel().getSelectedItem();
System.out.println(inventory_data.getPRODUCT_NAME()+ "" + inventory_data.getBATCH_ID());
personTable.setOnKeyPressed(event -> {
TablePosition<Inventory, ?> pos = personTable.getFocusModel().getFocusedCell() ;
if (pos != null) {
AnchorPane anchorPane= null;
try {
anchorPane = FXMLLoader.load(getClass().getClassLoader().getResource("edit_inventory_data.fxml"));
} catch (IOException e) {
e.printStackTrace();
}
Stage stage=new Stage();
stage.setTitle("Apna Dialog");
stage.initModality(Modality.WINDOW_MODAL);
stage.initOwner(StageManager.getInstance().getPrimaryStage());
Scene scene = new Scene(anchorPane);
stage.setScene(scene);
stage.showAndWait();
}
});
name.setOnEditCommit(new EventHandler<TableColumn.CellEditEvent<Inventory, String>>() {
@Override
public void handle(TableColumn.CellEditEvent<Inventory, String> t) {
System.out.println("ON edit commit" + t);
((Inventory) t.getTableView().getItems().get(
t.getTablePosition().getRow())).setPRODUCT_NAME(t.getNewValue());
}
}
);
}
@FXML
public void addData(ActionEvent actionEvent) throws IOException {
AnchorPane anchorPane= FXMLLoader.load(getClass().getClassLoader().getResource("add_data_inventory.fxml"));
Stage stage=new Stage();
stage.setTitle("Apna Dialog");
stage.initModality(Modality.WINDOW_MODAL);
stage.initOwner(StageManager.getInstance().getPrimaryStage());
Scene scene = new Scene(anchorPane);
stage.setScene(scene);
stage.showAndWait();
personTable.setItems(InventoryData.getInstance().getList());
}
}
inventory_layout.fxml
<?import javafx.geometry.Insets?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.control.TableColumn?>
<?import javafx.scene.control.TableView?>
<?import javafx.scene.control.TextField?>
<?import javafx.scene.layout.BorderPane?>
<?import javafx.scene.layout.HBox?>
<BorderPane maxHeight="600.0" maxWidth="800.0" prefHeight="600.0" prefWidth="800.0" stylesheets="@beautify_inventory.css" xmlns="http://javafx.com/javafx/8.0.65" xmlns:fx="http://javafx.com/fxml/1" fx:controller="pharmbooks.controllers.InventoryController">
<center>
<TableView fx:id="personTable" prefWidth="10000.0" BorderPane.alignment="CENTER">
<columns>
<TableColumn fx:id="batchId" prefWidth="75.0" text="BatchId" />
<TableColumn fx:id="packing" prefWidth="75.0" text="packing" />
<TableColumn fx:id="quantity" prefWidth="75.0" text="quantity" />
<TableColumn fx:id="expiry" prefWidth="75.0" text="expiry" />
<TableColumn fx:id="mrp" prefWidth="75.0" text="mrp" />
</columns>
</TableView>
</center>
<top>
<HBox prefHeight="67.0" prefWidth="800.0" BorderPane.alignment="CENTER">
<children>
<TextField prefHeight="47.0" prefWidth="163.00009155273438">
<HBox.margin>
<Insets bottom="10.0" left="10.0" right="10.0" top="10.0" />
</HBox.margin>
</TextField>
<Button mnemonicParsing="false" onAction="#addData" text="Button">
<HBox.margin>
<Insets bottom="20.0" left="20.0" right="20.0" top="20.0" />
</HBox.margin>
</Button>
<Button mnemonicParsing="false" prefHeight="39.0" prefWidth="121.0" text="Button">
<HBox.margin>
<Insets bottom="20.0" right="20.0" top="20.0" />
</HBox.margin>
</Button>
<Button mnemonicParsing="false" prefHeight="39.0" prefWidth="129.0" text="Button">
<HBox.margin>
<Insets bottom="20.0" top="20.0" />
</HBox.margin>
</Button>
</children>
</HBox>
</top>
</BorderPane>
答案 0 :(得分：0)
在inventory_layout.fxml中，您将fx:id属性设置为所有表格列：
<TableColumn fx:id="batchId" prefWidth="75.0" text="BatchId" />
<TableColumn fx:id="packing" prefWidth="75.0" text="packing" />
<TableColumn fx:id="quantity" prefWidth="75.0" text="quantity" />
<TableColumn fx:id="expiry" prefWidth="75.0" text="expiry" />
<TableColumn fx:id="mrp" prefWidth="75.0" text="mrp" />
但在InventoryController中，您没有使用@FXML注释此组件。没有这个注释FXMLLoader将无法向控制器注入正确的对象。正确的代码：
@FXML
public TableColumn batchId;
@FXML
public TableColumn company;
@FXML
public TableColumn name;
@FXML
public TableColumn packing;
@FXML
public TableColumn quantity;
@FXML
public TableColumn expiry;
@FXML
public TableColumn mrp;
当您尝试在表列上NullPointerException时，我猜测您在initalize()方法中获得setCellValueFactory()。
我假设您正在正确访问fxml资源文件。