How I can display data from MySQL? - mysql

Question

I have a database "workschedule" and a table "employee". But when I try to display data from this table, I can see only the last record from the table
ObservableList<Variable> employeeObList = FXCollections.observableArrayList();
columnId.setCellValueFactory(new PropertyValueFactory<Variable, Integer>("id"));
columnName.setCellValueFactory(new PropertyValueFactory<Variable, String>("name"));
ResultSet rs = conn.createStatement().executeQuery("SELECT * FROM workchedule.employees;");
try {
while (rs.next()) {
employeeObList.add(new Variable(rs.getInt("id"), rs.getString("name")));
}
} catch (SQLException e) {
System.out.println(e.getMessage());
}
finally {
rs.close();
conn.close();
}
employeeTableView.setItems(employeeObList);
#FXML private TableView<Variable> employeeTableView;
#FXML private TableColumn<Variable, Integer> columnId;
#FXML private TableColumn<Variable, String> columnName;
Variable - a class where I save variables with getters and setters
Image from MySQL
Image from a scene

Answer 1

So using jdbc I always do it like this:
Connector responsible for connecting to the DB:
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
public class Connector {
public Connection con = null;
final String URL = "jdbc:mysql://localhost:3306/dbname";
final String USERNAME = "username";
// Not so safe but easy
final String PASSWORD = "1234";
/*
* Adds DB Connection
*/
public void add() {
try {
con = DriverManager.getConnection(URL, USERNAME, PASSWORD);
} catch (SQLException se) {
se.printStackTrace();
}
}
}
Then I use a DAO to get the data from the database:
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import application.controller.Connector;
public class Dao{
Connector c = new Connector();
public ArrayList<Model> selectAllData() {
ArrayList<Model> list = new ArrayList<>();
try {
c.add();
PreparedStatementstmt = c.con.prepareStatement("SELECT id FROM db.table");
ResultSet result = stmt.executeQuery(
);
while (result.next()) {
Model model= new Model();
//here set all the attributes
model.setId(result.getInt("id"));
list.add(model);
}
} catch (SQLException se) {
se.printStackTrace();
} finally {
if (c.con != null) {
try {
c.con.close();
} catch (SQLException se) {
se.printStackTrace();
}
}
}
return list;
}
Then in the JavaFX Controller I can just call the DAO function.
#FXML
public void initialize() {
initTable();
}
/*
* Sets up the table and maps the values
*/
#SuppressWarnings("unchecked")
private void initTable() {
idCol.setCellValueFactory(new PropertyValueFactory<Model, Integer>("id"));
loadTableData();
}
/*
* Loads all the data into table
*/
private void loadTableData() {
models = dao.selectAllData();
data = FXCollections.observableArrayList(models);
table.setItems(data);
}