🧣 🤰🏿 💰 Desenvolvimento de um banco de dados media player para organizar músicas como o iTunes 👏🏿 👏🏿 🐻

Descrição da área de assunto

A área de assunto é um reprodutor de mídia semelhante ao iTunes. As principais entidades neste banco de dados são o usuário e a coleção de composições.

Cada música pertence a apenas um artista e um álbum, mas muitos usuários podem adicioná-los. Cada usuário pode adicionar um número ilimitado de músicas.

Cada usuário deve ter um e-mail e uma senha únicos que podem ser repetidos, graças a essas informações o usuário pode acessar sua conta. Além disso, os seguintes campos são obrigatórios para os usuários ao se registrar: nome, número de telefone, país de residência, data de início da assinatura e data de término da assinatura. Após o correto login ou registro bem-sucedido, o usuário é levado à página principal, onde é apresentada ao usuário uma seleção de faixas de diferentes artistas, entre as quais pode escolher as que gosta e adicioná-las à sua playlist. O número de faixas adicionadas não é limitado. Cada usuário possui sua própria conta pessoal, na qual pode visualizar a música adicionada, excluí-la, e também existe a opção de visualizar os dados pessoais do usuário inseridos por ele durante o registro.O usuário a qualquer momento pode deletar sua conta junto com todo seu conteúdo e seus dados do sistema.

Construindo um modelo lógico

Usando a descrição da área de assunto, construímos um modelo lógico

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Nota

Para resolver a relação muitos-para-muitos entre as entidades "USERS" e "TRACK LIST", foi criada uma tabela "VALIDADE DA ASSINATURA", que inclui a data de início da assinatura e seu término.

O resto das entidades representam as entidades do nosso domínio.

Construindo um modelo relacional

O modelo lógico foi convertido em relacional usando o Oracle SQL Developer Data Modeler

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Conformidade com formas normais

Todas as tabelas desse modelo correspondem a 1NF, pois todos os atributos possuem apenas um único valor para cada registro, o que exclui a multiplicidade.

Todas as tabelas estão na segunda forma normal, uma vez que cada atributo não-chave é irredutivelmente dependente de uma chave primária.

Todas as tabelas estão na terceira forma normal, uma vez que cada atributo não chave é dependente não transitivamente da chave primária. Não há dependência de um atributo não chave em outro atributo não chave.

Todas as tabelas correspondem ao NFBC, porque os determinantes de todas as dependências funcionais são chaves potenciais.

Explicação das dependências funcionais

Criação de banco de dados e aplicativo

O banco de dados é criado no servidor phpMyAdmin local. O resultado do programa é mostrado abaixo:

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Páginas disponíveis

Testando o programa

Testar como o aplicativo reage às entradas esperadas e testar a integridade do botão

Vamos verificar a exatidão da reação do aplicativo aos dados de entrada esperados + a operabilidade de todos os campos, botões e listas suspensas.

Verificar a exatidão do registro do usuário

Verifique se o botão Adicionar música à biblioteca do usuário está funcionando corretamente

«FALSE ALARM by THE WEEKND»

«FALSE ALARM by THE WEEKND» «TRACK LIST» 32

«MY MUSIC», 32

Verificando se o botão para deletar música da biblioteca do usuário funciona corretamente

«FALSE ALARM by THE WEEKND»

«MY MUSIC», 32

32 «TRACK LIST»

Verificar se o botão para ordenar música por artista funciona corretamente

«MUSE»

«KASABIAN»

Verificar o funcionamento correto do botão para excluir uma conta de usuário do sistema

«ivanivanov@mail.ru»

«Delete user from system»

«USERS», 18

Testando a resposta do aplicativo a entradas erradas

Ao inserir dados incorretos, o programa notifica o usuário sobre isso

Erro de entrada de nome incorreto

Erro de entrada de email inválido

Entrada incorreta do número de telefone

Um erro que ocorre ao tentar duplicar as credenciais de um usuário existente

Um erro que ocorre ao tentar inserir as credenciais de um usuário inexistente

Tudo funciona para a entrada de dados esperada. Para a ausência de entrada e para entrada incorreta, o programa emite um aviso

Formulários

Apêndice 1 - código para criar tabelas

Código para criar tabelas no Oracle Data Modeler

-- Generated by Oracle SQL Developer Data Modeler 19.4.0.350.1424
--   at:        2020-06-01 16:18:08 MSK
--   site:      Oracle Database 11g
--   type:      Oracle Database 11g

CREATE TABLE albums (
    id            VARCHAR2(5) NOT NULL,
    album_name    VARCHAR2(20) NOT NULL,
    release_year  DATE NOT NULL,
    genre         VARCHAR2(20) NOT NULL
);

ALTER TABLE albums ADD CONSTRAINT albums_pk PRIMARY KEY ( id );

CREATE TABLE my_music (
    user_id    VARCHAR2(5) NOT NULL,
    my_msc_id  NUMBER NOT NULL
);

CREATE UNIQUE INDEX my_music__idx ON
    my_music (
        user_id
    ASC );

ALTER TABLE my_music ADD CONSTRAINT my_msc_pk PRIMARY KEY ( my_msc_id );

CREATE TABLE performers (
    id              VARCHAR2(5) NOT NULL,
    performer_name  VARCHAR2(30) NOT NULL
);

ALTER TABLE performers ADD CONSTRAINT performers_pk PRIMARY KEY ( id );

CREATE TABLE subscription_validity (
    "Start_Date/_Start_Time"  DATE NOT NULL,
    "End_Date/_End_Time"      DATE NOT NULL,
    user_id                   VARCHAR2(5) NOT NULL,
    track_list_id             VARCHAR2(5) NOT NULL
);

ALTER TABLE subscription_validity ADD CONSTRAINT subscription_validity_pk PRIMARY KEY ( user_id,
                                                                                        track_list_id );

CREATE TABLE songs (
    id                  VARCHAR2(5) NOT NULL,
    track_name          VARCHAR2(50) NOT NULL,
    genre               VARCHAR2(20) NOT NULL,
    duration            TIMESTAMP NOT NULL,
    albums_id           VARCHAR2(5) NOT NULL,
    performers_id       VARCHAR2(5) NOT NULL,
    my_music_my_msc_id  NUMBER NOT NULL
);

ALTER TABLE track_list ADD CONSTRAINT track_list_pk PRIMARY KEY ( id );

CREATE TABLE "USER" (
    id                  VARCHAR2(5) NOT NULL,
    password            VARCHAR2(20) NOT NULL,
    name                VARCHAR2(30) NOT NULL,
    email               VARCHAR2(30) NOT NULL,
    phone_number        VARCHAR2(12) NOT NULL,
    country             VARCHAR2(20) NOT NULL,
    balance             NUMBER(7, 2),
    my_music_my_msc_id  NUMBER NOT NULL
);

CREATE UNIQUE INDEX user__idx ON
    "USER" (
        my_music_my_msc_id
    ASC );

ALTER TABLE "USER" ADD CONSTRAINT user_pk PRIMARY KEY ( id );

ALTER TABLE my_music
    ADD CONSTRAINT my_music_user_fk FOREIGN KEY ( user_id )
        REFERENCES "USER" ( id );

ALTER TABLE subscription_validity
    ADD CONSTRAINT subs_val_track_list_fk FOREIGN KEY ( track_list_id )
        REFERENCES track_list ( id );

ALTER TABLE subscription_validity
    ADD CONSTRAINT subs_val_user_fk FOREIGN KEY ( user_id )
        REFERENCES "USER" ( id );

ALTER TABLE track_list
    ADD CONSTRAINT track_list_albums_fk FOREIGN KEY ( albums_id )
        REFERENCES albums ( id );

ALTER TABLE track_list
    ADD CONSTRAINT track_list_my_music_fk FOREIGN KEY ( my_music_my_msc_id )
        REFERENCES my_music ( my_msc_id );

ALTER TABLE track_list
    ADD CONSTRAINT track_list_performers_fk FOREIGN KEY ( performers_id )
        REFERENCES performers ( id );

ALTER TABLE "USER"
    ADD CONSTRAINT user_my_music_fk FOREIGN KEY ( my_music_my_msc_id )
        REFERENCES my_music ( my_msc_id );

CREATE SEQUENCE my_msc_my_msc_id_seq START WITH 1 NOCACHE ORDER;

CREATE OR REPLACE TRIGGER my_msc_my_msc_id_trg BEFORE
    INSERT ON my_music
    FOR EACH ROW
    WHEN ( new.my_msc_id IS NULL )
BEGIN
    :new.my_msc_id := my_msc_my_msc_id_seq.nextval;
END;
/

-- Oracle SQL Developer Data Modeler Summary Report: 
-- 
-- CREATE TABLE                             6
-- CREATE INDEX                             2
-- ALTER TABLE                             13
-- CREATE VIEW                              0
-- ALTER VIEW                               0
-- CREATE PACKAGE                           0
-- CREATE PACKAGE BODY                      0
-- CREATE PROCEDURE                         0
-- CREATE FUNCTION                          0
-- CREATE TRIGGER                           1
-- ALTER TRIGGER                            0
-- CREATE COLLECTION TYPE                   0
-- CREATE STRUCTURED TYPE                   0
-- CREATE STRUCTURED TYPE BODY              0
-- CREATE CLUSTER                           0
-- CREATE CONTEXT                           0
-- CREATE DATABASE                          0
-- CREATE DIMENSION                         0
-- CREATE DIRECTORY                         0
-- CREATE DISK GROUP                        0
-- CREATE ROLE                              0
-- CREATE ROLLBACK SEGMENT                  0
-- CREATE SEQUENCE                          1
-- CREATE MATERIALIZED VIEW                 0
-- CREATE MATERIALIZED VIEW LOG             0
-- CREATE SYNONYM                           0
-- CREATE TABLESPACE                        0
-- CREATE USER                              0
-- 
-- DROP TABLESPACE                          0
-- DROP DATABASE                            0
-- 
-- REDACTION POLICY                         0
-- 
-- ORDS DROP SCHEMA                         0
-- ORDS ENABLE SCHEMA                       0
-- ORDS ENABLE OBJECT                       0
-- 
-- ERRORS                                   0
-- WARNINGS                                 0

Apêndice 2 - código do programa

Classe DataBase

package sample.database;

import javafx.event.ActionEvent;
import sample.model.Performers;
import sample.model.TrackList;
import sample.model.User;

import java.sql.*;
import java.util.ArrayList;

public class DataBase {

    public static void main(String[] args) {
        DataBase dataBase = new DataBase();
        for (TrackList t:dataBase.allMusic()
             ) {
            System.out.println(t.toString());
        }
    }
    //
    public boolean loginIn(String email, String password) {
        try {
            Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/my_tunes", "root", "root");
            Statement stmt = conn.createStatement();
            //       (   )
            ResultSet rset = stmt.executeQuery("SELECT * FROM users u INNER JOIN subscription_validity s ON u.id_users=s.id_users where email = '" + email + "'&& password ='" + password + "'");
            if (rset.next()) {
                User.setId(rset.getInt(1));
                User.setName(rset.getString(3));
                User.setEmail(rset.getString(4));
                User.setPhone(rset.getString(5));
                User.setCountry(rset.getString(6));
                User.setStartDate(rset.getString(8));
                User.setEndDate(rset.getString(9));
                return true;
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return false;
    }


    public boolean emailCheck(String email) {
        try {
        	//   db
            Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/my_tunes", "root", "root");
            //   Statement
            Statement stmt = conn.createStatement();
            //        
            ResultSet rset = stmt.executeQuery("select * from users where email = '" + email + "'");
            return !rset.next();
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return true;
    }

    public void registration(String name, String email, String phone, String password, String country, String startDate, String endDate) {
        try {
        	//   db
            Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/my_tunes", "root", "root");
            //   Statement
            Statement stmt = conn.createStatement();
            //       users  
            stmt.executeUpdate("insert into users (email,password,name,phone_num,contry) value ('" + email + "','" + password + "','" + name + "','" + phone + "','" + country + "')");
            //       subscription_validity
            stmt.executeUpdate("insert into subscription_validity (Start_Date_Start_Time, End_Date_End_Time,id_users) value ('" + startDate + "','" + endDate + "', (select max(id_users) from users) )");
            stmt.close();
            conn.close();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }

    //   
    public ArrayList<TrackList> allMusic() {
        ArrayList<TrackList> arrayList = new ArrayList<>();
        try {
            Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/my_tunes", "root", "root");

            Statement stmt = conn.createStatement();
            //           
            ResultSet rset = stmt.executeQuery("SELECT * FROM track_list t INNER JOIN performers p  ON p.id_performers=t.id_performers INNER JOIN albums a ON a.id_albums=t.id_albums");
            while (rset.next()) {
                arrayList.add(new TrackList(rset.getInt(1), rset.getString(2), rset.getString(10), rset.getString(8), rset.getString(3), rset.getString(4)));
            }
            rset.close();
            stmt.close();
            conn.close();
        } catch (SQLException throwables) {
            throwables.printStackTrace();
        }
        return arrayList;
    }

    //   
    public ArrayList<TrackList> myMusic(int id) {
        ArrayList<TrackList> arrayList = new ArrayList<>();
        try {
            Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/my_tunes", "root", "root");

            Statement stmt = conn.createStatement();
            //           
            ResultSet rset = stmt.executeQuery("SELECT m.id_track_list, t.track_name, " +
                    "a.album_name, p.performer_name, t.genre, t.duration FROM my_music m INNER JOIN " +
                    "track_list t ON t.id_track_list=m.id_track_list INNER JOIN performers p ON " +
                    "p.id_performers=t.id_performers INNER JOIN albums a ON a.id_albums=t.id_albums WHERE m.id_users=" + id);
            while (rset.next()) {
                arrayList.add(new TrackList(rset.getInt(1), rset.getString(2), rset.getString(3), rset.getString(4), rset.getString(5), rset.getString(6)));
            }
            rset.close();
            stmt.close();
            conn.close();
        } catch (SQLException throwables) {
            throwables.printStackTrace();
        }
        return arrayList;
    }

    public void addMyMusic(int idUser, int idTrackList) {
        try {
            Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/my_tunes", "root", "root");
            Statement stmt = conn.createStatement();
            ResultSet rset = stmt.executeQuery("SELECT * FROM my_music WHERE " +
                    "id_users = " + idUser + " && id_track_list = " + idTrackList);
            //   id user,    
            //       
            if (!rset.next())
                stmt.executeUpdate("INSERT INTO my_music (id_users, id_track_list) VALUE ("+ idUser +", "+  idTrackList +")");
            rset.close();
            stmt.close();
            conn.close();
            //         
        } catch (SQLException e){
            e.printStackTrace();
        }
    }

    public void deleteMyMusic(int idUser, int idTrackList) {
        try {
            Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/my_tunes", "root", "root");
            Statement stmt = conn.createStatement();
            stmt.executeUpdate("DELETE FROM my_music WHERE id_users =" + idUser + "&& id_track_list =" + idTrackList);
            stmt.close();
            conn.close();
        } catch (SQLException e){
            e.printStackTrace();
        }
    }
    //     
    public ArrayList<Performers> performers(){
        ArrayList<Performers> arrayList = new ArrayList();
        try {
            Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/my_tunes", "root", "root");
            Statement stmt = conn.createStatement();
            ResultSet rset = stmt.executeQuery("SELECT * FROM performers");
            while(rset.next()){
                arrayList.add(new Performers(rset.getInt(1),rset.getString(2)));
            }
            rset.close();
            stmt.close();
            conn.close();
        } catch (SQLException e){
            e.printStackTrace();
        }
        return arrayList;
    }
    //      
    public ArrayList<TrackList> performerMusic(int id) {
        ArrayList<TrackList> arrayList = new ArrayList<>();
        try {
            Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/my_tunes", "root", "root");

            Statement stmt = conn.createStatement();
            //           
            ResultSet rset = stmt.executeQuery("SELECT * FROM track_list t INNER JOIN performers p  ON p.id_performers=t.id_performers INNER JOIN albums a ON a.id_albums=t.id_albums WHERE p.id_performers = " + id);
            while (rset.next()) {
                arrayList.add(new TrackList(rset.getInt(1), rset.getString(2), rset.getString(10), rset.getString(8), rset.getString(3), rset.getString(4)));
            }
            rset.close();
            stmt.close();
            conn.close();
        } catch (SQLException throwables) {
            throwables.printStackTrace();
        }
        return arrayList;
    }
    //    
    public void deleteUser(int idUser) {
        try {
            Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/my_tunes", "root", "root");
            Statement stmt = conn.createStatement();
            stmt.executeUpdate("DELETE FROM users WHERE id_users =" + idUser);
            stmt.close();
            conn.close();
        } catch (SQLException e){
            e.printStackTrace();
        }
    }
}

Classe principal


package sample;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Modality;
import javafx.stage.Stage;

public class Main extends Application {

    @Override
    public void start(Stage primaryStage) throws Exception{
        Parent root = FXMLLoader.load(getClass().getResource("/sample/fxml/login.fxml"));
        Stage newStage = new Stage();
        newStage.setScene(new Scene(root));
        newStage.initModality(Modality.NONE);
        newStage.show();
    }

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

Aula de música


package sample;

import javafx.application.Application;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.fxml.Initializable;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ComboBox;
import javafx.scene.control.ListView;
import javafx.stage.Modality;
import javafx.stage.Stage;
import sample.database.DataBase;
import sample.model.Performers;
import sample.model.TrackList;
import sample.model.User;

import java.io.IOException;
import java.net.URL;
import java.util.ArrayList;
import java.util.ResourceBundle;

public class Music implements Initializable {
    @FXML
    public ListView<TrackList> allMusic;
    @FXML
    public ComboBox comboBox;
    @FXML
    public Button myMusic;

    DataBase dataBase = new DataBase();
    ArrayList<TrackList> arrayList;

    TrackList trackList = null;

    public void addMyMusic(ActionEvent actionEvent) {
    	//    " "
        if(trackList != null)
            dataBase.addMyMusic(User.getId(),trackList.getId());
    }

    @Override
    public void initialize(URL location, ResourceBundle resources) {
        arrayList = dataBase.allMusic();
        ObservableList<TrackList> observableList = FXCollections.observableList(arrayList);

        allMusic.setItems(observableList);
        allMusic.getSelectionModel().selectedItemProperty().addListener(new ChangeListener<TrackList>(){

            @Override
            public void changed(ObservableValue<? extends TrackList> observable, TrackList oldValue, TrackList newValue) {
                trackList = newValue;
            }
        });

        for (Performers p:dataBase.performers()
        ) {
            comboBox.getItems().add(p);
        }

        comboBox.getItems().add(new Performers(0,"All"));
        comboBox.setValue(new Performers(0,"All"));
        comboBox.valueProperty().addListener(new ChangeListener<Performers>() {

            @Override
            public void changed(ObservableValue<? extends Performers> observable, Performers oldValue, Performers newValue) {
                if(newValue.getId() == 0) {
                    arrayList = dataBase.allMusic();
                    ObservableList<TrackList> observableList = FXCollections.observableList(arrayList);
                    allMusic.setItems(observableList);
                } else{
                    arrayList = dataBase.performerMusic(newValue.getId());
                    ObservableList<TrackList> observableList = FXCollections.observableList(arrayList);
                    allMusic.setItems(observableList);
                }
            }
        });
    }

    public void myMusic(ActionEvent actionEvent) {
        Stage stage = (Stage) myMusic.getScene().getWindow();
        stage.close();
        try {
            Parent root = FXMLLoader.load(getClass().getResource("/sample/fxml/mymusic.fxml"));
            Stage newStage = new Stage();
            newStage.setScene(new Scene(root));
            newStage.initModality(Modality.NONE);
            newStage.show();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

Aula MyMusic


package sample;

import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.fxml.Initializable;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ListView;
import javafx.stage.Modality;
import javafx.stage.Stage;
import sample.database.DataBase;
import sample.model.TrackList;
import sample.model.User;

import javax.jws.soap.SOAPBinding;
import java.io.IOException;
import java.net.URL;
import java.util.ArrayList;
import java.util.ResourceBundle;

public class MyMusic implements Initializable {
    @FXML
    public ListView allMusic;
    @FXML
    public Button back;
    @FXML
    public Button userData;
    DataBase dataBase = new DataBase();
    ArrayList<TrackList> arrayList;
    TrackList trackList = null;

    public void deleteMyMusic(ActionEvent actionEvent) {
        if(trackList != null)
            dataBase.deleteMyMusic(User.getId(),trackList.getId());

        arrayList = dataBase.myMusic(User.getId());
        ObservableList<TrackList> observableList = FXCollections.observableList(arrayList);

        allMusic.setItems(observableList);
    }

    @Override
    public void initialize(URL location, ResourceBundle resources) {
        arrayList = dataBase.myMusic(User.getId());
        ObservableList<TrackList> observableList = FXCollections.observableList(arrayList);

        allMusic.setItems(observableList);
        allMusic.getSelectionModel().selectedItemProperty().addListener(new ChangeListener<TrackList>(){

            @Override
            public void changed(ObservableValue<? extends TrackList> observable, TrackList oldValue, TrackList newValue) {
                trackList = newValue;
            }
        });
    }

    public void userData(ActionEvent actionEvent) {
        Stage stage = (Stage) userData.getScene().getWindow();
        stage.close();
        try {
            Parent root = FXMLLoader.load(getClass().getResource("/sample/fxml/userdata.fxml"));
            Stage newStage = new Stage();
            newStage.setScene(new Scene(root));
            newStage.initModality(Modality.NONE);
            newStage.show();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public void back(ActionEvent actionEvent) {
        Stage stage = (Stage) back.getScene().getWindow();
        stage.close();
        try {
            Parent root = FXMLLoader.load(getClass().getResource("/sample/fxml/music.fxml"));
            Stage newStage = new Stage();
            newStage.setScene(new Scene(root));
            newStage.initModality(Modality.NONE);
            newStage.show();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

Aula de inscrição


package sample;

import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.PasswordField;
import javafx.scene.control.TextField;
import javafx.stage.Stage;
import sample.database.DataBase;


public class Registration {
    @FXML
    public Label error;
    @FXML
    public Button reg;
    @FXML
    public TextField phone;
    @FXML
    public PasswordField password;
    @FXML
    public PasswordField repeatPassword;
    @FXML
    public TextField name;
    @FXML
    public TextField email;
    @FXML
    public TextField endDate;
    @FXML
    public TextField startDate;
    @FXML
    public TextField country;

    public void registration(ActionEvent actionEvent) {
        DataBase dataBase = new DataBase();
        // String name,String email,String phone, String password, String country, String startDate, String endDate
        if(name.getText().matches("[a-zA-Zђ-Ї°-Џ]{3,}")){
                if(email.getText().matches("[A-Za-z0-9]{3,}[@][A-Za-z0-9]{3,}[.][A-Za-z0-9]{2,}")){
                    if(phone.getText().matches("[+][7][0-9]{10}") || phone.getText().matches("[8][0-9]{10}")){
                        if(dataBase.emailCheck(email.getText())){
                            if(password.getText().equals(repeatPassword.getText())){
                                dataBase.registration(name.getText(),email.getText(),
                                        phone.getText(),password.getText(),country.getText(), startDate.getText(), endDate.getText());
                                Stage stage = (Stage)reg.getScene().getWindow();
                                stage.close();
                            }else{
                                error.setText("  ");
                            }
                        }else{
                            error.setText("  ");
                        }
                    }else{
                        error.setText("    +7**********  8**********");
                    }
                }else{
                    error.setText(" emeail   ***@***.**");
                }
        }else{
            error.setText("  ");
        }
    }
}

Classe de dados do usuário


package sample;

import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.fxml.Initializable;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.stage.Modality;
import javafx.stage.Stage;
import sample.database.DataBase;
import sample.model.User;

import java.io.IOException;
import java.net.URL;
import java.util.ResourceBundle;

public class Userdata implements Initializable {
    @FXML
    public Label name;
    @FXML
    public Label email;
    @FXML
    public Label phone;
    @FXML
    public Label contry;
    @FXML
    public Label startDate;
    @FXML
    public Label endDate;
    @FXML
    public Button back;
    @FXML
    public Button delete;

    @Override
    public void initialize(URL location, ResourceBundle resources) {
        name.setText(User.getName());
        email.setText(User.getEmail());
        phone.setText(User.getPhone());
        contry.setText(User.getCountry());
        startDate.setText(User.getStartDate());
        endDate.setText(User.getEndDate());
    }

    public void back(ActionEvent actionEvent) {
        Stage stage = (Stage) back.getScene().getWindow();
        stage.close();
        try {
            Parent root = FXMLLoader.load(getClass().getResource("/sample/fxml/mymusic.fxml"));
            Stage newStage = new Stage();
            newStage.setScene(new Scene(root));
            newStage.initModality(Modality.NONE);
            newStage.show();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public void delete(ActionEvent actionEvent) {
        DataBase dataBase = new DataBase();
        dataBase.deleteUser(User.getId());

        Stage stage = (Stage) delete.getScene().getWindow();
        stage.close();
        try {
            Parent root = FXMLLoader.load(getClass().getResource("/sample/fxml/login.fxml"));
            Stage newStage = new Stage();
            newStage.setScene(new Scene(root));
            newStage.initModality(Modality.NONE);
            newStage.show();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

Aula de performers


package sample.model;

public class Performers {
    private int id;
    private String name;

    public Performers(int id, String name) {
        this.id = id;
        this.name = name;
    }

    @Override
    public String toString() {
        return name;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}

Classe TrackList


package sample.model;

public class TrackList {
    private int id;
    private String trackName;
    private String albumName;
    private String performerName;
    private String genre;
    private String duration;

    public TrackList(int id, String trackName, String albumName, String performerName, String genre, String duration) {
        this.id = id;
        this.trackName = trackName;
        this.albumName = albumName;
        this.performerName = performerName;
        this.genre = genre;
        this.duration = duration;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getTrackName() {
        return trackName;
    }

    public void setTrackName(String trackName) {
        this.trackName = trackName;
    }

    public String getAlbumName() {
        return albumName;
    }

    public void setAlbumName(String albumName) {
        this.albumName = albumName;
    }

    public String getPerformerName() {
        return performerName;
    }

    public void setPerformerName(String performerName) {
        this.performerName = performerName;
    }

    public String getGenre() {
        return genre;
    }

    public void setGenre(String genre) {
        this.genre = genre;
    }

    public String getDuration() {
        return duration;
    }

    public void setDuration(String duration) {
        this.duration = duration;
    }

    @Override
    public String toString() {
        return
                trackName +
                " by " + performerName  +
                " from album - " + albumName +
                " (" + genre + ") " +
                ", " + duration;
    }


}

Classe de usuário


package sample.model;

public class User {
    private static int id;
    private static String name;
    private static  String email;
    private static String phone;
    private static String country;

    private static String startDate;
    private static String endDate;

    public static int getId() {
        return id;
    }

    public static void setId(int id) {
        User.id = id;
    }

    public static String getName() {
        return name;
    }

    public static void setName(String name) {
        User.name = name;
    }

    public static String getEmail() {
        return email;
    }

    public static void setEmail(String email) {
        User.email = email;
    }

    public static String getPhone() {
        return phone;
    }

    public static void setPhone(String phone) {
        User.phone = phone;
    }

    public static String getCountry() {
        return country;
    }

    public static void setCountry(String country) {
        User.country = country;
    }

    public static String getStartDate() {
        return startDate;
    }

    public static void setStartDate(String startDate) {
        User.startDate = startDate;
    }

    public static String getEndDate() {
        return endDate;
    }

    public static void setEndDate(String endDate) {
        User.endDate = endDate;
    }
}

Aula de login


package sample;

import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.PasswordField;
import javafx.scene.control.TextField;
import javafx.stage.Modality;
import javafx.stage.Stage;
import sample.database.DataBase;

import java.io.IOException;

public class Login {
    @FXML
    public Button loginIn;
    @FXML
    public Button registration;
    @FXML
    public TextField email;
    @FXML
    public PasswordField password;
    @FXML
    public Label error;

    public void loginIn(ActionEvent actionEvent) {
        DataBase dataBase = new DataBase();
        if(email.getText() != null ){
            if(password.getText() != null){
                if(dataBase.loginIn(email.getText(), password.getText())){
                    Stage stage = (Stage) loginIn.getScene().getWindow();
                    stage.close();
                    try {
                        Parent root = FXMLLoader.load(getClass().getResource("/sample/fxml/music.fxml"));
                        Stage newStage = new Stage();
                        newStage.setScene(new Scene(root));
                        newStage.initModality(Modality.NONE);
                        newStage.show();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                } else {
                    error.setText("This Login or Password does not exist");
                }
            } else {
                error.setText("Please, enter your Password: ");
            }
        } else {
            error.setText("Please, enter your Login: ");
        }
    }

    public void registration(ActionEvent actionEvent) {
        try {
            Parent root = FXMLLoader.load(getClass().getResource("/sample/fxml/registration.fxml"));
            Stage newStage = new Stage();
            newStage.setScene(new Scene(root));
            newStage.initModality(Modality.NONE);
            newStage.show();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

Desenvolvimento de um banco de dados media player para organizar músicas como o iTunes