tableview上选定的行数据

Question

我在FXML文件中创建了一个Tableview并填充了TableView。我还创建了另一个FXML文件StaffDetails，当我点击tableview上的一行时，StaffDetails FXML文件标签将插入该行的内容。我的问题是，对于每一行，我点击StaffDetails FXML文件只插入第1行的内容，而不是我点击的行的内容..请在下面是代码。

viewEmployee.setOnMouseClicked(e->{

    try {
        Employee user =(Employee)viewEmployee.getSelectionModel().getSelectedItem();
        String details="select *from Employee where STAFFID =?";
        pstmt=conn.prepareStatement(details);
        pstmt.setString(1,user.getStaffId());
        rs=pstmt.executeQuery();


        Stage stage = new Stage();
        Parent root = FXMLLoader.load(getClass().getResource("StaffDetails.fxml"));

        Scene scene = new Scene(root);

        stage.setScene(scene);

        stage.show();

@Override
public void initialize(URL location, ResourceBundle resources) {

    try {
        Class.forName("org.apache.derby.jdbc.ClientDriver");
        conn=DriverManager.getConnection("jdbc:derby://localhost:1527/Employee","Conduct","ccb");

        String details="select *from Employee";
        pstmt=conn.prepareStatement(details);

        rs=pstmt.executeQuery();

        rs.next();

        st.setText(rs.getString("staffId"));
        su.setText(rs.getString("surname"));
        fn.setText(rs.getString("firstName"));
        on.setText(rs.getString("otherNames"));
        db.setText(rs.getString("dateOfBirth"));
        sx.setText(rs.getString("sex"));