我正在开发一个程序，该程序将允许用户通过带有 javafx tableview tablecell 中的图像的切换按钮选择/添加声音作为收藏夹，并在数据库中设置声音的状态（更新收藏夹状态数据库有效）但是图像的更新仅部分有效。
按下切换按钮时，图像会像数据库一样正确更新
初始加载
任何最喜欢的选择之前的前 10 条记录
按下按钮后
数据库
但是当我停止并重新启动程序时问题就来了，因为我没有选择任何按钮（应该是声音 id 5）
这是数据库数据加载的代码
public void getSounds() {
soundFilelist.removeAll(soundFilelist);
try {
Connection conn = DriverManager.getConnection("jdbc:sqlite:Sphere.db");
// add where userId = VerifiedUserId or something simular//
String sql = "SELECT * FROM Sounds Where userId = ? ";
PreparedStatement ps;
ResultSet rs;
ps = conn.prepareStatement(sql);
ps.setInt(1 , User.getUserId());
rs = ps.executeQuery();
while (rs.next()) {
int favoriteStatus;
soundFilelist.add(new Sound(
rs.getInt("SoundId") ,
rs.getString("SoundName") ,
rs.getString("soundPath") ,
rs.getLong("soundDurration") ,
favoriteStatus = rs.getInt("Favorite")));
System.out.println(favoriteStatus);
if(favoriteStatus == 0){
setFavoritesTableButton(0);
}else if(favoriteStatus == 1){
setFavoritesTableButton(1);
}
}
soundBrowser.setItems(soundFilelist);
} catch (SQLException throwables) {
throwables.printStackTrace();
}
}
the addButtoncell code
（最喜欢的第 2 列）修改自https://riptutorial.com/javafx/example/27946/add-button-to-tableview
private void addButtonToTable() {
Callback<TableColumn<Sound, Void>, TableCell<Sound, Void>> cellFactory = new Callback<TableColumn<Sound, Void>, TableCell<Sound, Void>>() {
@Override
public TableCell<Sound, Void> call(final TableColumn<Sound, Void> param) {
favoritecell = new TableCell<>() {
private final ToggleButton btn = new ToggleButton();
private Image favoritesImage = new Image("SoundSphere/RegularSizeFavoritesImage.png");
private Image favoriteslPressedImage = new Image("SoundSphere/RegularSizeFavoriteslPressedImage.png");
private ImageView tableViewFavorites = new ImageView();
{
tableViewFavorites.setFitWidth(20);
tableViewFavorites.setFitHeight(20);
btn.setAlignment(Pos.CENTER);
// favoritecell.setAlignment(Pos.CENTER);
btn.setGraphic(tableViewFavorites);
btn.setOnAction((new EventHandler<ActionEvent>() {
@Override
public void handle(ActionEvent actionEvent) {
if ((btn.isSelected())) {
Sound sound = getTableView().getItems().get(getIndex());
sound.setSoundId(soundIdColumn.getCellData(sound));
System.out.println("selected SID: "+ sound.getSoundId());
int selectedSoundId2 = sound.getSoundId();
tableViewFavorites.setImage(favoriteslPressedImage);
tableviewFavoriteButtonIsPressed = false;
//addFavorite();
System.out.println("buttonselectedId"+ selectedSoundId);
addFavorite2(selectedSoundId2);
}else{
Sound sound = getTableView().getItems().get(getIndex());
sound.setSoundId(soundIdColumn.getCellData(sound));
int selectedSoundId2 = sound.getSoundId();
tableViewFavorites.setImage(favoritesImage);
tableviewFavoriteButtonIsPressed = true;
removeFavorite2(selectedSoundId2);
}
}
private void removeFavorite2(int selectedSoundId2) {
try{
Connection conn = DriverManager.getConnection("jdbc:sqlite:Sphere.db");
String sql = "UPDATE Sounds " +
"SET Favorite = ?"+
// "soundName = ?"+
"Where soundId = ? AND userId = ?";
PreparedStatement ps;
ps = conn.prepareStatement(sql);
ps.setInt(1,0);
ps.setInt(2 , selectedSoundId2);
ps.setInt(3 , User.getUserId());
ps.executeUpdate();
System.out.println("Data has been removed");
}catch(Exception e){
System.out.println("we have a problem with add favorite 2");
e.printStackTrace();
}
}
}));
}
private void addFavorite2(int favoriteSoundId) {
try{
Connection conn = DriverManager.getConnection("jdbc:sqlite:Sphere.db");
String sql = "UPDATE Sounds " +
"SET Favorite = ?"+
// "soundName = ?"+
"Where soundId = ? AND userId = ?";
PreparedStatement ps;
ps = conn.prepareStatement(sql);
ps.setInt(1,1);
ps.setInt(2 , favoriteSoundId);
System.out.println(favoriteSoundId);
ps.setInt(3 , User.getUserId());
ps.executeUpdate();
System.out.println("Data has been inserted");
}catch(Exception e){
System.out.println("we have a problem with add favorite 2");
e.printStackTrace();
}
}
@Override
public void updateItem(Void item , boolean empty) {
super.updateItem(item , empty);
if (btn.isSelected() || dbFavorite) {
tableViewFavorites.setImage(tableFavoriteslPressedImage);
setGraphic(btn);
} if (!btn.isSelected() || !dbFavorite) {
tableViewFavorites.setImage(favoritesImage);
setGraphic(btn);
}
}
};
return favoritecell;
}
};
favoritesColumn2.setCellFactory(cellFactory);
soundBrowser.getColumns().add(favoritesColumn2);
}
public boolean setFavoritesTableButton(int favoriteStatus){
if(favoriteStatus == 1) {
dbFavorite = true;
}else if(favoriteStatus == 0){
dbFavorite = false;
}
return dbFavorite;
}
相关的可初始化代码
soundNameColumn.setCellValueFactory(new PropertyValueFactory<>("soundName"));
soundPathColumn.setCellValueFactory(new PropertyValueFactory<>("soundPath"));
soundDurationColumn.setCellValueFactory(new PropertyValueFactory<>("soundDurration"));
favoritesColumn.setCellValueFactory(new PropertyValueFactory<>("Favorite"));
addButtonToTable();
getSounds();
我尝试在获取声音方法和各种布尔值中设置切换按钮的状态，但我的尝试都没有奏效。
感谢您的时间和任何帮助
托马斯·古斯塔夫森