Tolong contoh koneksi JavaFX MySQL

Minimal, Anda memerlukan tiga kelas:satu untuk mewakili data Anda, satu untuk UI Anda, dan satu untuk mengelola koneksi database. Dalam aplikasi nyata Anda akan membutuhkan lebih dari ini, tentu saja. Contoh ini mengikuti contoh dasar yang sama dengan TableView tutorial

Misalkan database Anda memiliki person tabel dengan tiga kolom, first_name , last_name , email_address .

Kemudian Anda akan menulis Person kelas:

import javafx.beans.property.StringProperty ;
import javafx.beans.property.SimpleStringProperty ;

public class Person {
    private final StringProperty firstName = new SimpleStringProperty(this, "firstName");
    public StringProperty firstNameProperty() {
        return firstName ;
    }
    public final String getFirstName() {
        return firstNameProperty().get();
    }
    public final void setFirstName(String firstName) {
        firstNameProperty().set(firstName);
    }

    private final StringProperty lastName = new SimpleStringProperty(this, "lastName");
    public StringProperty lastNameProperty() {
        return lastName ;
    }
    public final String getLastName() {
        return lastNameProperty().get();
    }
    public final void setLastName(String lastName) {
        lastNameProperty().set(lastName);
    }

    private final StringProperty email = new SimpleStringProperty(this, "email");
    public StringProperty emailProperty() {
        return email ;
    }
    public final String getEmail() {
        return emailProperty().get();
    }
    public final void setEmail(String email) {
        emailProperty().set(email);
    }

    public Person() {}

    public Person(String firstName, String lastName, String email) {
        setFirstName(firstName);
        setLastName(lastName);
        setEmail(email);
    }

}

Kelas untuk mengakses data dari database:

import java.sql.Connection ;
import java.sql.DriverManager ;
import java.sql.SQLException ;
import java.sql.Statement ;
import java.sql.ResultSet ;

import java.util.List ;
import java.util.ArrayList ;

public class PersonDataAccessor {

    // in real life, use a connection pool....
    private Connection connection ;

    public PersonDataAccessor(String driverClassName, String dbURL, String user, String password) throws SQLException, ClassNotFoundException {
        Class.forName(driverClassName);
        connection = DriverManager.getConnection(dbURL, user, password);
    }

    public void shutdown() throws SQLException {
        if (connection != null) {
            connection.close();
        }
    }

    public List<Person> getPersonList() throws SQLException {
        try (
            Statement stmnt = connection.createStatement();
            ResultSet rs = stmnt.executeQuery("select * from person");
        ){
            List<Person> personList = new ArrayList<>();
            while (rs.next()) {
                String firstName = rs.getString("first_name");
                String lastName = rs.getString("last_name");
                String email = rs.getString("email_address");
                Person person = new Person(firstName, lastName, email);
                personList.add(person);
            }
            return personList ;
        } 
    }

    // other methods, eg. addPerson(...) etc
}

Dan kemudian kelas UI:

import javafx.application.Application ;
import javafx.scene.control.TableView ;
import javafx.scene.control.TableColumn ;
import javafx.scene.control.cell.PropertyValueFactory ;
import javafx.scene.layout.BorderPane ;
import javafx.scene.Scene ;
import javafx.stage.Stage ;

public class PersonTableApp extends Application {
    private PersonDataAccessor dataAccessor ;

    @Override
    public void start(Stage primaryStage) throws Exception {
        dataAccessor = new PersonDataAccessor(...); // provide driverName, dbURL, user, password...

        TableView<Person> personTable = new TableView<>();
        TableColumn<Person, String> firstNameCol = new TableColumn<>("First Name");
        firstNameCol.setCellValueFactory(new PropertyValueFactory<>("firstName"));
        TableColumn<Person, String> lastNameCol = new TableColumn<>("Last Name");
        lastNameCol.setCellValueFactory(new PropertyValueFactory<>("lastName"));
        TableColumn<Person, String> emailCol = new TableColumn<>("Email");
        emailCol.setCellValueFactory(new PropertyValueFactory<>("email"));

        personTable.getColumns().addAll(firstNameCol, lastNameCol, emailCol);

        personTable.getItems().addAll(dataAccessor.getPersonList());

        BorderPane root = new BorderPane();
        root.setCenter(personTable);
        Scene scene = new Scene(root, 600, 400);
        primaryStage.setScene(scene);
        primaryStage.show();
    }

    @Override
    public void stop() throws Exception {
        if (dataAccessor != null) {
            dataAccessor.shutdown();
        }
    }

    public static void main(String[] args) {
        launch(args);
    }
}

(Saya baru saja mengetiknya tanpa pengujian, jadi mungkin ada kesalahan ketik, impor yang hilang, dll, tetapi itu sudah cukup untuk memberi Anda gambaran.)