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我有一個小應用程序。有了這個應用程序,我可以添加一個新的員工記錄到MySQL數據庫,然後顯示這些記錄。 buildData()
從數據庫中檢索數據並將其顯示在TableView中,每次添加新記錄以「刷新」TableView時,我也會調用此方法。然而,這並不像預期的那樣。JavaFX TableView爲相同的數據添加額外的列
這是被添加的第一個記錄後認爲:
,當我按下按鈕來添加另一條記錄,這是我得到:
如果我關閉了應用程序並重新打開它,TableView正常:
這是buildData()
方法是什麼樣子
private ObservableList<ObservableList> data;
public void buildData() {
Connection c;
TableColumn col;
data = FXCollections.observableArrayList();
try {
c = DataBaseConnection.connectToDatabase();
String SQL = "SELECT * FROM employees";
ResultSet rs = c.createStatement().executeQuery(SQL);
for (int i = 0; i < rs.getMetaData().getColumnCount(); i++) {
final int j = i;
col = new TableColumn(rs.getMetaData().getColumnName(i + 1));
col.setCellValueFactory(new Callback<TableColumn.CellDataFeatures<ObservableList, String>, ObservableValue<String>>() {
public ObservableValue<String> call(TableColumn.CellDataFeatures<ObservableList, String> param) {
return new SimpleStringProperty(param.getValue().get(j).toString());
}
});
employeeTableView.getColumns().addAll(col);
}
while (rs.next()) {
ObservableList<String> row = FXCollections.observableArrayList();
for (int i = 1; i <= rs.getMetaData().getColumnCount(); i++) {
row.add(rs.getString(i));
}
data.add(row);
}
employeeTableView.setItems(data);
} catch (Exception e) {
e.printStackTrace();
System.out.println("Error on Building Data");
}
}
,然後方法到一個新的員工記錄添加到數據庫中(方法忽略類型檢查和所有that.Probably的原因是什麼?):
public void addEmployeeToDatabase() {
Employee employee = new Employee("Anne Droid", "Marketing", "Gender");
String query = "INSERT INTO employees (Employee_Name, Department, Gender) VALUES (?, ? , ?)";
try {
preparedStatement = connection.prepareStatement(query);
preparedStatement.setString(1, employee.getEmployeeName());
preparedStatement.setString(2, employee.getDepartment());
preparedStatement.setString(3, employee.getGender());
preparedStatement.execute();
buildData();
connection.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
最後,Employee類:使用PUR
public class Employee {
private StringProperty employeeName;
private StringProperty department;
private StringProperty gender;
public Employee() {
}
public Employee(String employeeName, String department, String gender) {
this.employeeName = new SimpleStringProperty(employeeName);
this.department = new SimpleStringProperty(department);
this.gender = new SimpleStringProperty(gender);
}
public String getEmployeeName() {
return employeeName.get();
}
public StringProperty employeeNameProperty() {
return employeeName;
}
...
上午e java,沒有FXML。我搜索了一個解決方案,但沒有可用(據我所知)。 任何指針?
是啊!那樣做了。謝謝 –