我想在JavaFX的ImageView中显示图像。应从SQLite数据库中获取图像，并在加载场景时显示该图像。我使用以下代码片段从数据库中获取代码，并将其显示在先前创建的ImageView中。但是图像未按预期显示。我做错了吗？ ps我已经测试了在FileOutputStream和从目录读取文件到src/image.jpg时都更改路径。但是似乎没有任何作用。但是，当我手动将图像文件放在src目录中并尝试读取它时，它的工作原理就像一个魅力。但我想显示从数据库中获取的图像。

@FXML
private void loadEquipmentData() throws IOException {
    try{
        Connection conn = DatabaseConnection.getconnection();
        PreparedStatement checkStmt = conn.prepareStatement(selectEquipmentQuery);
        ResultSet rs = checkStmt.executeQuery();

        while(rs.next()){
            InputStream is = rs.getBinaryStream("Image");
            OutputStream os = new FileOutputStream(new File("image.jpg"));
            byte[] content = new byte[1024];
            int size = 0;
            while ((size = is.read(content)) != -1){
                os.write(content,size);
            }
            os.close();
            is.close();

            File file = new File("file:image.jpg");
            image = new Image(file.toURI().toString());
            this.eq_img.setImage(image);
            this.eq_img.setPreserveRatio(true);
            this.eq_img.setfitWidth(318.0);
            this.eq_img.setfitHeight(253.0);
        }

    } catch (SQLException e) {
        e.printStackTrace();
    } catch (FileNotFoundException fnf) {
        fnf.printStackTrace();
    }

}

将图像写入数据库时​​，我使用此代码选择图像。

private FileChooser fileChooser;
private File file;
private FileInputStream fis;

@FXML
void chooseFiles() throws FileNotFoundException {
    CommonStageSingleton stageSingleton = CommonStageSingleton.getInstance();
    Stage userStage = stageSingleton.getMainWindow();
    fileChooser = new FileChooser();
    fileChooser.getExtensionFilters().addAll(
            new FileChooser.ExtensionFilter("Image Files","*.jpg","*gif","*.jpeg","*.png")
    );

    file = fileChooser.showOpenDialog(userStage);
    if(file != null){
        fis = new FileInputStream(file);
        ta_imagePath.setText(file.getabsolutePath());
    }
}

然后将它们输入数据库。

Connection conn = DatabaseConnection.getconnection();
PreparedStatement checkStmt = conn.prepareStatement(checkEquipmentQuery);
PreparedStatement st = conn.prepareStatement(insertEquipmentQuery);
st.setBinaryStream(12,(InputStream)fis,(int)file.length());

我可能已经做过一些事情来将该图像保存为.jpg。