在JavaFX中填充TableView [英] Populating TableView in JavaFX

问题描述

我是一个新手在这里，我的表视图在JavFX即为tblstudent不包含我想要的

记录。如何做到这一点，请帮助我。

I am a newbie in here, my Table View in JavFX namely as tblStudent is NOT containing the
records that I want. How to do this, please help me.

    public void populateData(){
      Connection c ;
      data = FXCollections.observableArrayList();
      try{
        c = ConnectionClass.connect();
        //SQL FOR SELECTING ALL OF CUSTOMER
        String SQL = "SELECT * FROM `student`";
        //ResultSet
        ResultSet rs = c.createStatement().executeQuery(SQL);


        studentIDCol = new TableColumn("Student ID");
        nameCol = new TableColumn("Name");
        addressCol = new TableColumn("Address");
        ageCol = new TableColumn("Age");
        contactnoCol = new TableColumn("Contact Number");

        while(rs.next()){
            //Iterate Row
            ObservableList<String> row = FXCollections.observableArrayList();

            row.add(rs.getString("id"));
            row.add(rs.getString("name"));
            row.add(rs.getString("address"));
            row.add(rs.getString("age"));
            row.add(rs.getString("contact_num"));

            System.out.println("Row [1] added "+row );
            data.add(row);

        }

        //FINALLY ADDED TO TableView
        tblStudent.getItems().setAll(data);
      }catch(Exception e){
          e.printStackTrace();
          System.out.println("Error on Building Data");             
      }
 }

谁知道这个？

推荐答案

您需要将单元格值工厂设置为所有列，如下所示：

You need to set the cell value factory to all your columns like this:

TableColumn<ObservableList<String>, String> studentIDCol  = new TableColumn<>("Student ID");
    studentIDCol.setCellValueFactory(new Callback<TableColumn.CellDataFeatures<ObservableList<String>,String>, ObservableValue<String>>() {         
        @Override
        public ObservableValue<String> call(CellDataFeatures<ObservableList<String>, String> cdf) {     
            return new SimpleStringProperty(cdf.getValue().get(0));
        }
    });

还建议您将查询提取到服务，因为查询会阻塞JavaFX线程。请查看 http://docs.oracle.com/javafx/2/threads /jfxpub-threads.htm

And also I recommend you to extract your query to a service, because the query will block the JavaFX Thread. Check out http://docs.oracle.com/javafx/2/threads/jfxpub-threads.htm

使用测试数据检查此完整示例。

Check this full example with test data.

public void start(Stage stage) throws Exception {
    VBox vbox = new VBox(10.0);
    vbox.setAlignment(Pos.CENTER);

    final TableView<ObservableList<String>> table = new TableView<>();

    TableColumn<ObservableList<String>, String> studentIDCol  = new TableColumn<>("Student ID");
    studentIDCol.setCellValueFactory(new Callback<TableColumn.CellDataFeatures<ObservableList<String>,String>, ObservableValue<String>>() {         
        @Override
        public ObservableValue<String> call(CellDataFeatures<ObservableList<String>, String> cdf) {     
            return new SimpleStringProperty(cdf.getValue().get(0));
        }
    }); 

    TableColumn<ObservableList<String>, String> nameCol = new TableColumn<>("Name");
    nameCol.setCellValueFactory(new Callback<TableColumn.CellDataFeatures<ObservableList<String>,String>, ObservableValue<String>>() {          
        @Override
        public ObservableValue<String> call(CellDataFeatures<ObservableList<String>, String> cdf) {     
            return new SimpleStringProperty(cdf.getValue().get(1));
        }
    });     

    TableColumn<ObservableList<String>, String> addressCol  = new TableColumn<>("Address");
    addressCol.setCellValueFactory(new Callback<TableColumn.CellDataFeatures<ObservableList<String>,String>, ObservableValue<String>>() {           
        @Override
        public ObservableValue<String> call(CellDataFeatures<ObservableList<String>, String> cdf) {     
            return new SimpleStringProperty(cdf.getValue().get(2));
        }
    });     

    TableColumn<ObservableList<String>, String> ageCol  = new TableColumn<>("Age");
    ageCol.setCellValueFactory(new Callback<TableColumn.CellDataFeatures<ObservableList<String>,String>, ObservableValue<String>>() {           
        @Override
        public ObservableValue<String> call(CellDataFeatures<ObservableList<String>, String> cdf) {     
            return new SimpleStringProperty(cdf.getValue().get(3));
        }
    });     

    TableColumn<ObservableList<String>, String> contactnoCol  = new TableColumn<>("Contact Number");
    contactnoCol.setCellValueFactory(new Callback<TableColumn.CellDataFeatures<ObservableList<String>,String>, ObservableValue<String>>() {         
        @Override
        public ObservableValue<String> call(CellDataFeatures<ObservableList<String>, String> cdf) {     
            return new SimpleStringProperty(cdf.getValue().get(4));
        }
    });     

    table.getColumns().add(studentIDCol);
    table.getColumns().add(nameCol);
    table.getColumns().add(addressCol);
    table.getColumns().add(ageCol);
    table.getColumns().add(contactnoCol);   

    final ProgressBar bar = new ProgressBar(-1);
    bar.setVisible(false);

    final Button button = new Button("Fill");
    button.setOnAction(new EventHandler<ActionEvent>() {            
        @Override
        public void handle(ActionEvent event) {
            final Service<ObservableList<ObservableList<String>>> service = new Service<ObservableList<ObservableList<String>>>() {                 
                @Override
                protected Task<ObservableList<ObservableList<String>>> createTask() {
                    return new Task<ObservableList<ObservableList<String>>>() {
                        @Override
                        protected ObservableList<ObservableList<String>> call() throws Exception {
                            ObservableList<ObservableList<String>> items = FXCollections.observableArrayList();
                            items.add(FXCollections.observableArrayList("1", "2", "3", "4", "5"));
                            items.add(FXCollections.observableArrayList("1", "2", "3", "4", "5"));
                            items.add(FXCollections.observableArrayList("1", "2", "3", "4", "5"));
                            //Here the code for the query
                            Thread.sleep(5000);//To see the progress
                            return items;
                        }
                    };
                }
            };

            bar.visibleProperty().bind(service.runningProperty());
            button.disableProperty().bind(service.runningProperty());
            table.itemsProperty().bind(service.valueProperty());

            service.start();
        }
    });     

    vbox.getChildren().addAll(table, button, bar);
    Scene scene = new Scene(vbox, 300, 300);
    stage.setScene(scene);
    stage.show();
}

如果您使用的是FXML文件。您需要跳过TableColumn的初始化步骤。

If you are using a FXML file. You need to skip the initialization step of the TableColumn.

使用@FXML注释将TableColumn声明为控制器类文件中的字段。确保实现javafx.fxml.Initializable。在初始化方法中，您可以为每个列执行配置。

Declare the TableColumn as a fields in the file in your controller class with the @FXML annotation. Ensure you implements javafx.fxml.Initializable. And in the initialize method you can do the configuration side for every column. And avoid the add of the columns to the table, because they already are in the table view.

下面是一个示例，如果你在你的FXML中定义你的TableView，就像这样：

Here is a sample if your are defining your TableView in your FXML like this:

<TableView layoutX="145.0" layoutY="76.0" prefHeight="200.0" prefWidth="200.0">
  <columns>
    <TableColumn prefWidth="75.0" text="Student ID" fx:id="studentIDCol" />
    <TableColumn prefWidth="75.0" text="Name" fx:id="nameCol" />
    <TableColumn prefWidth="75.0" text="Address" fx:id="addressCol" />
    <TableColumn prefWidth="75.0" text="Age" fx:id="ageCol" />
  </columns>
</TableView>

然后你的控制器类将是这样：

Then your controller class will be like this:

class YourTest implements javafx.fxml.Initializable{
//More Code
@FXML
TableColumn<ObservableList<String>, String> studentIDCol;
@FXML
TableColumn<ObservableList<String>, String> nameCol;
@FXML
TableColumn<ObservableList<String>, String> addressCol;
@FXML
TableColumn<ObservableList<String>, String> ageCol;
//More of your code 
@Override
public void initialize(URL arg0, ResourceBundle arg1) {
    studentIDCol.setCellValueFactory(new Callback<TableColumn.CellDataFeatures<ObservableList<String>,String>, ObservableValue<String>>() {         
        @Override
        public ObservableValue<String> call(CellDataFeatures<ObservableList<String>, String> cdf) {     
            return new SimpleStringProperty(cdf.getValue().get(0));
        }
    }); 

    nameCol.setCellValueFactory(new Callback<TableColumn.CellDataFeatures<ObservableList<String>,String>, ObservableValue<String>>() {          
        @Override
        public ObservableValue<String> call(CellDataFeatures<ObservableList<String>, String> cdf) {     
            return new SimpleStringProperty(cdf.getValue().get(1));
        }
    });             

    addressCol.setCellValueFactory(new Callback<TableColumn.CellDataFeatures<ObservableList<String>,String>, ObservableValue<String>>() {           
        @Override
        public ObservableValue<String> call(CellDataFeatures<ObservableList<String>, String> cdf) {     
            return new SimpleStringProperty(cdf.getValue().get(2));
        }
    });     

    ageCol.setCellValueFactory(new Callback<TableColumn.CellDataFeatures<ObservableList<String>,String>, ObservableValue<String>>() {           
        @Override
        public ObservableValue<String> call(CellDataFeatures<ObservableList<String>, String> cdf) {     
            return new SimpleStringProperty(cdf.getValue().get(3));
        }
    });     

    contactnoCol.setCellValueFactory(new Callback<TableColumn.CellDataFeatures<ObservableList<String>,String>, ObservableValue<String>>() {         
        @Override
        public ObservableValue<String> call(CellDataFeatures<ObservableList<String>, String> cdf) {     
            return new SimpleStringProperty(cdf.getValue().get(4));
        }
    });  
}
//More of your Code
}

它有助于。

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