尝试遵循 MVC 模式答案

【问题标题】：Trying to follow MVC Pattern尝试遵循 MVC 模式
【发布时间】：2016-04-09 10:07:58
【问题描述】：

我正在尝试使用 MVC 模式构建我的第一个 JAVA Swing 应用程序。但我不太喜欢它。尤其是关于如何编码。我在这个站点和其他站点上阅读了很多关于 MVC 的内容。这是我读到的关于 MVC 的内容之一： The MVC pattern and SWING

http://www.tutorialspoint.com/design_pattern/mvc_pattern.htm

我对开发还很陌生，想从头开始使用最佳实践。

我认为我对 MVC 模式的理解是您有一个 Controller、一个 Model 和一个 View。 Controller 从View 获取它的输入。然后 Controller 要求 Model 改变它的状态。从 Model 中获取状态并执行它需要对输入执行的所有操作，例如将其存储到数据库或使用从数据库返回的内容更改 View。

例如，如果单击“添加地址”按钮，它会从视图中的文本字段中获取输入。 Controller 更新 Model 并将其从 View 获取的数据保存到数据库中。如果单击“搜索地址”按钮，它将从 View 中的文本字段中获取输入，然后搜索数据库，如果它获取数据，则更新 Model 并将其输出视图。

如果我对 MVC 的了解是正确的，我该如何编写代码？

是否可以使用我目前的代码来解释它？

如何将数据从 View 获取到 Controller 再到 Model？

这是我目前的代码：

查看 JFrame

public class WolffAddressManagerMVCJFrameVIEW extends javax.swing.JFrame {
    /**
     * Creates new form StoringAdresses1JFrame
     */
    public WolffAddressManagerMVCJFrameVIEW() {
        initComponents();
    }

    @SuppressWarnings("unchecked")

    private void initComponents() {

        jPanel1 = new javax.swing.JPanel();
        jLabel1 = new javax.swing.JLabel();
        jLabel2 = new javax.swing.JLabel();
        jLabel3 = new javax.swing.JLabel();
        jLabel4 = new javax.swing.JLabel();
        jLabel5 = new javax.swing.JLabel();
        jLabel6 = new javax.swing.JLabel();
        jLabel7 = new javax.swing.JLabel();
        firstName = new javax.swing.JTextField();
        lastName = new javax.swing.JTextField();
        emailAdress = new javax.swing.JTextField();
        searchEmailAdress = new javax.swing.JTextField();
        removeEmailAddress = new javax.swing.JTextField();
        street = new javax.swing.JTextField();
        number = new javax.swing.JTextField();
        additive = new javax.swing.JTextField();
        zipCode = new javax.swing.JTextField();
        city = new javax.swing.JTextField();
        addAdress = new javax.swing.JButton();
        removeAdress = new javax.swing.JButton();
        searchAdress = new javax.swing.JButton();
        jPanel2 = new javax.swing.JPanel();
        jScrollPane1 = new javax.swing.JScrollPane();
        showInputOutput = new javax.swing.JTextArea();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jPanel1.setBorder(javax.swing.BorderFactory.createTitledBorder(null, "Address Input Fields", javax.swing.border.TitledBorder.DEFAULT_JUSTIFICATION, javax.swing.border.TitledBorder.DEFAULT_POSITION, new java.awt.Font("Trebuchet MS", 1, 14))); // NOI18N

        jLabel1.setFont(new java.awt.Font("Trebuchet MS", 1, 11)); // NOI18N
        jLabel1.setText("First Name:");

        jLabel2.setFont(new java.awt.Font("Trebuchet MS", 1, 11)); // NOI18N
        jLabel2.setText("Last Name:");

        jLabel3.setFont(new java.awt.Font("Trebuchet MS", 1, 11)); // NOI18N
        jLabel3.setText("Email Adress:");

        jLabel4.setFont(new java.awt.Font("Trebuchet MS", 1, 11)); // NOI18N
        jLabel4.setText("Street / Number / Add");

        jLabel5.setFont(new java.awt.Font("Trebuchet MS", 1, 11)); // NOI18N
        jLabel5.setText("Zipcode / City");

        jLabel6.setFont(new java.awt.Font("Trebuchet MS", 1, 11)); // NOI18N
        jLabel6.setText("Email Address:");

        jLabel7.setFont(new java.awt.Font("Trebuchet MS", 1, 11)); // NOI18N
        jLabel7.setText("Email Address:");

        firstName.setFont(new java.awt.Font("Trebuchet MS", 1, 11)); // NOI18N

        lastName.setFont(new java.awt.Font("Trebuchet MS", 1, 11)); // NOI18N

        emailAdress.setFont(new java.awt.Font("Trebuchet MS", 1, 11)); // NOI18N

        street.setFont(new java.awt.Font("Trebuchet MS", 1, 11)); // NOI18N

        number.setFont(new java.awt.Font("Trebuchet MS", 1, 11)); // NOI18N

        additive.setFont(new java.awt.Font("Trebuchet MS", 1, 11)); // NOI18N

        zipCode.setFont(new java.awt.Font("Trebuchet MS", 1, 11)); // NOI18N

        city.setFont(new java.awt.Font("Trebuchet MS", 1, 11)); // NOI18N

        addAdress.setFont(new java.awt.Font("Trebuchet MS", 1, 14)); // NOI18N
        addAdress.setText("Add Address");
        ActionListener actionListener = new MainWindowActionListenerMVCVIEW(firstName, lastName, emailAdress, street, number, additive, zipCode, city, searchEmailAdress, removeEmailAddress);
        addAdress.addActionListener(actionListener);

        removeAdress.setFont(new java.awt.Font("Trebuchet MS", 1, 14)); // NOI18N
        removeAdress.setText("Remove Address");
        removeAdress.setBackground(Color.RED);
        removeAdress.addActionListener(actionListener);

        searchAdress.setFont(new java.awt.Font("Trebuchet MS", 1, 14)); // NOI18N
        searchAdress.setText("Search Address");
        searchAdress.addActionListener(actionListener);


        javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
        jPanel1.setLayout(jPanel1Layout);
        jPanel1Layout.setHorizontalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                    .addComponent(jLabel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(jLabel2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(jLabel3, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(jLabel4, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(jLabel5, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(jLabel6, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(jLabel7, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addComponent(firstName)
                            .addComponent(lastName)
                            .addComponent(emailAdress)
                            .addComponent(searchEmailAdress)
                            .addComponent(removeEmailAddress)
                            .addGroup(jPanel1Layout.createSequentialGroup()
                                .addComponent(street, javax.swing.GroupLayout.PREFERRED_SIZE, 147, javax.swing.GroupLayout.PREFERRED_SIZE)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                .addComponent(number, javax.swing.GroupLayout.DEFAULT_SIZE, 49, Short.MAX_VALUE)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                .addComponent(additive, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)))
                        .addGap(8, 8, 8))
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addComponent(zipCode, javax.swing.GroupLayout.PREFERRED_SIZE, 114, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(city)
                        .addContainerGap())))
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(addAdress, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(removeAdress, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(searchAdress, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                .addContainerGap())
        );
        jPanel1Layout.setVerticalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addGap(2, 2, 2)
                        .addComponent(firstName, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE)))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel2, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(lastName, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(emailAdress, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jLabel3, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel4, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(street, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(number, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(additive, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel5, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(zipCode, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(city, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(41, 41, 41)
                .addComponent(addAdress, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(18, 18, 18)

                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                .addComponent(removeEmailAddress, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(jLabel7, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(18, 18, 18)
                .addComponent(removeAdress, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                .addComponent(searchEmailAdress, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(jLabel6, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(18, 18, 18)
                .addComponent(searchAdress, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(203, Short.MAX_VALUE))
        );

        jPanel2.setBorder(javax.swing.BorderFactory.createTitledBorder(null, "Show Input / Show Search", javax.swing.border.TitledBorder.DEFAULT_JUSTIFICATION, javax.swing.border.TitledBorder.DEFAULT_POSITION, new java.awt.Font("Trebuchet MS", 1, 14))); // NOI18N

        showInputOutput.setFont(new java.awt.Font("Trebuchet MS", 1, 14)); // NOI18N
        jScrollPane1.setViewportView(showInputOutput);

        javax.swing.GroupLayout jPanel2Layout = new javax.swing.GroupLayout(jPanel2);
        jPanel2.setLayout(jPanel2Layout);
        jPanel2Layout.setHorizontalGroup(
            jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 349, Short.MAX_VALUE)
        );
        jPanel2Layout.setVerticalGroup(
            jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(jScrollPane1)
        );

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(jPanel2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addContainerGap())
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(jPanel2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
            .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
        );

        pack();
    }                  
    private javax.swing.JButton addAdress;
    private javax.swing.JButton removeAdress;
    private javax.swing.JButton searchAdress;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JLabel jLabel4;
    private javax.swing.JLabel jLabel5;
    private javax.swing.JLabel jLabel6;
    private javax.swing.JLabel jLabel7;
    public javax.swing.JTextArea showInputOutput;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JPanel jPanel2;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTextField firstName;
    private javax.swing.JTextField lastName;
    private javax.swing.JTextField emailAdress;
    private javax.swing.JTextField searchEmailAdress;
    private javax.swing.JTextField removeEmailAddress;
    private javax.swing.JTextField street;
    private javax.swing.JTextField number;
    private javax.swing.JTextField additive;
    private javax.swing.JTextField zipCode;
    private javax.swing.JTextField city;                
}

查看 ActionListener

public class MainWindowActionListenerMVCVIEW implements ActionListener {
    public  JTextField firstName, lastName, emailAddress, street, number, additive, zipCode, city, searchEmailAdress, removeEmailAddress;


    public MainWindowActionListenerMVCVIEW(JTextField fName, JTextField lName, JTextField eAddress, JTextField streetName, JTextField houseNumber, JTextField add, JTextField zCode, JTextField cityName, JTextField searchEAdress, JTextField removeEAddress) {

        this.firstName = fName;
        this.lastName = lName;
        this.emailAddress = eAddress;
        this.street = streetName;
        this.number = houseNumber;
        this.additive = add;
        this.zipCode = zCode;
        this.city = cityName;
        this.searchEmailAdress = searchEAdress;
        this.removeEmailAddress = removeEAddress;
    }


    @Override
    public void actionPerformed(ActionEvent e) {
        firstName.getText();
        lastName.getText();
        emailAddress.getText();
        street.getText();
        number.getText();
        additive.getText();
        zipCode.getText();
        city.getText();
        searchEmailAdress.getText();
        removeEmailAddress.getText();
        System.out.println("test" + " " + firstName.getText()); // I put this in just te see if the *ActionListener* works

     }
}

模型

public class WolffAddressManagerMVCMODEL {
    public String firstName;
    public String lastName;
    public String emailAddress;
    public String street;
    public String number;
    public String additive;
    public String zipCode;
    public String city;
}

控制器

public class WolffAddressManagerMVCController {
    public WolffAddressManagerMVCMODEL controllerModel;
    public MainWindowActionListenerMVCVIEW controllerActionListener;
    public WolffAddressManagerMVCJFrameVIEW controllerJFrame;
    private Connection connect = null;
    private final Statement statement = null;
    private PreparedStatement preparedStatement = null;
    private ResultSet resultSet = null;
    public ArrayList<String> queryResultSet = new ArrayList();

    public void saveAddressToDataBase(MainWindowActionListenerMVCVIEW controller) throws Exception {

        try {
            Class.forName("com.mysql.jdbc.Driver");
            connect = DriverManager.getConnection("jdbc:mysql://localhost/dev?" + "user=root&password=password");
            preparedStatement = connect.prepareStatement("SELECT email FROM dev.addresses WHERE email= '" + controller.emailAddress.getText() + "'");
            resultSet = preparedStatement.executeQuery();

            if(resultSet.next()) {
                JOptionPane.showMessageDialog(null,  "Email already exist", "InfoBox: " + "Error", JOptionPane.INFORMATION_MESSAGE);
            } else {
                preparedStatement = connect.prepareStatement("INSERT INTO  dev.addresses (firstname, lastname, email, street, housenumber, additve, zipcode, city) VALUES(?, ?, ?, ?, ?, ?, ?, ?)");
                preparedStatement.setString(1, controller.firstName.getText());
                preparedStatement.setString(2, controller.lastName.getText());
                preparedStatement.setString(3, controller.emailAddress.getText());
                preparedStatement.setString(4, controller.street.getText());
                preparedStatement.setString(5, controller.number.getText());
                preparedStatement.setString(6, controller.additive.getText());
                preparedStatement.setString(7, controller.zipCode.getText());
                preparedStatement.setString(8, controller.city.getText());
                preparedStatement.executeUpdate();
            }

        } catch (ClassNotFoundException | SQLException | HeadlessException e) {
          throw e;
        } finally {
          close();
        }
    }

    public void searchAddress(String emailAddress) throws Exception {
        try {
            Class.forName("com.mysql.jdbc.Driver");
              // Setup the connection with the DB
            connect = DriverManager.getConnection("jdbc:mysql://localhost/dev?" + "user=root&password=fiat128slc");
            preparedStatement = connect.prepareStatement("SELECT * FROM dev.addresses WHERE email= '" + emailAddress + "'");
            resultSet = preparedStatement.executeQuery();
            if(resultSet.isBeforeFirst()) {
                while(resultSet.next()) {
                    queryResultSet.add(resultSet.getString("firstname"));
                    queryResultSet.add(resultSet.getString("lastname"));
                    queryResultSet.add(resultSet.getString("email"));
                    queryResultSet.add(resultSet.getString("street"));
                    queryResultSet.add(resultSet.getString("housenumber"));
                    queryResultSet.add(resultSet.getString("additve"));
                    queryResultSet.add(resultSet.getString("zipcode"));
                    queryResultSet.add(resultSet.getString("city"));
                }
            } else {
                JOptionPane.showMessageDialog(null, "Email doesn't exist", "InfoBox: " + "Error", JOptionPane.INFORMATION_MESSAGE);
            }
        } catch (ClassNotFoundException | SQLException | HeadlessException e) {
          throw e;
        } finally {
          close();
        }
    }

【问题讨论】：

标签： java swing model-view-controller

【解决方案1】：

我编辑了我的最后一个答案。我认为我在正确的轨道上。在我的 MVC 项目中使用 getter 和 setter。我现在有一个负责查询的班级。

控制器

    public class WolffAddressManagerMVCController {
    private final WolffAddressManagerMVCMODEL model;
    private final WolffAddressManagerQueriesMVCSERVICES query;

    public WolffAddressManagerMVCController(WolffAddressManagerMVCMODEL model) {
        this.query = new WolffAddressManagerQueriesMVCSERVICES();
        this.model = model;
    }


    public void buildView() throws Exception {
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(WolffAddressManagerMVCJFrameVIEW.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        java.awt.EventQueue.invokeLater(new Runnable() {
                @Override
                public void run() {
                    new WolffAddressManagerMVCJFrameVIEW().setVisible(true);
                }
            });
        }

    public void buildView2() throws Exception {
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(WolffAddressManagerMVCUpdateJFrameVIEW.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        java.awt.EventQueue.invokeLater(new Runnable() {
                @Override
                public void run() {
                    new WolffAddressManagerMVCUpdateJFrameVIEW().setVisible(true);
                }
            });
        }

    public void addCredentials(WolffAddressManagerMVCJFrameVIEW view , WolffAddressManagerMVCMODEL model) throws Exception {
        if(model.getEmailAddress().equals(model.getReTypeEmailAddress())) {
            if(query.saveAddressToDataBase(view, model) == true) {
                showCredentials(view);
            }
            else {
                view.setTextArea(view.getTextArea() + "EMAIL ALREADY EXISTS\n\n");
            }
        } else {
            JOptionPane.showMessageDialog(null,  "Emailaddresses are not the same", "InfoBox: " + "Error", JOptionPane.INFORMATION_MESSAGE);
        }
    }

    private void showCredentials(WolffAddressManagerMVCJFrameVIEW view) throws Exception {
        DefaultListModel<String> jList = new DefaultListModel();
        JList<String> list = new JList(jList);
        model.setSearchResultArray(searchCredentials(model));
        for(int i = 0; i < model.getSearchResultArray().size(); i++) {
            jList.addElement(model.getSearchResultArray().get(i));
        }
        list.setModel(jList);

        int size = list.getModel().getSize();
        StringBuilder credentials = new StringBuilder();

        for(int i = 0; i < size; i++) {
           credentials.append(list.getModel().getElementAt(i)).append("\n");
        }
        view.setTextArea(view.getTextArea() + credentials.toString()+ "CREDENTIALS ADDED\n\n");
    }

    public void removeCredentials() throws Exception {
        query.removeAddress(model.getEmailAddress());
    }

    public ArrayList<String> searchCredentials(WolffAddressManagerMVCMODEL model) throws Exception {
        return query.searchAddress(model.getEmailAddress());
    }

    public void showSearchResult(WolffAddressManagerMVCJFrameVIEW view, WolffAddressManagerMVCMODEL model) {
        DefaultListModel<String> jList = new DefaultListModel();
        JList<String> list = new JList(jList);

        try {
            model.setSearchResultArray(searchCredentials(model));
        } catch (Exception e) {
            Logger.getLogger(MainWindowActionListenerSearchMVCVIEW.class.getName()).log(Level.SEVERE, null, e);
        } 
        for(int i = 0; i < model.getSearchResultArray().size(); i++) {
            jList.addElement(model.getSearchResultArray().get(i));
        }
        list.setModel(jList);

        int size = list.getModel().getSize();
        StringBuilder credentials = new StringBuilder();
        for(int i = 0; i < size; i++) {
           credentials.append(list.getModel().getElementAt(i)).append("\n");
        }
        view.setTextArea(view.getTextArea() + credentials.toString());
    }

    private void showUpdateResult(WolffAddressManagerMVCUpdateJFrameVIEW view, WolffAddressManagerMVCMODEL model) {
        DefaultListModel<String> jList = new DefaultListModel();
        JList<String> list = new JList(jList);

        try {
            model.getUpdateResultArray();
        } catch (Exception e) {
            Logger.getLogger(MainWindowActionListenerSearchMVCVIEW.class.getName()).log(Level.SEVERE, null, e);
        } 
        for(int i = 0; i < model.getUpdateResultArray().size(); i++) {
            jList.addElement(model.getUpdateResultArray().get(i));
        }
        list.setModel(jList);

        int size = list.getModel().getSize();
        StringBuilder credentials = new StringBuilder();
        for(int i = 0; i < size; i++) {
           credentials.append(list.getModel().getElementAt(i)).append("\n");
        }
        view.setTextArea(credentials.toString());
    }

    public void updateCredentials(WolffAddressManagerMVCUpdateJFrameVIEW view,WolffAddressManagerMVCMODEL model) throws Exception {
        if(query.updateAddress(view, model) == true) {
            showUpdateResult(view,model);
        }
    }
}

模型

       public class WolffAddressManagerMVCMODEL {
    private String updateEmailAddress;
    private String companyName;
    private String firstName;
    private String lastName;
    private String emailAddress;
    private String reTypeEmailAddress;
    private String street;
    private String number;
    private String additive;
    private String zipCode;
    private String city;
    private JTextField jTextFieldUpdateEmailAddress;
    private JTextField jTextFieldCompanyName;
    private JTextField jTextFieldFirstName;
    private JTextField jTextFieldLastName;
    private JTextField jTextFieldEmailAddress;
    private JTextField jTextFieldReTypeEmailAddress;
    private JTextField jTextFieldStreetName;
    private JTextField jTextFieldHouseNumber;
    private JTextField jTextFieldAdditive;
    private JTextField jTextFieldZipCode;
    private JTextField jTextFieldCityName;
    private JTextField jTextFieldSearchEmailAddress;
    private JTextField jTextFieldRemoveEmailAddress;
    private ArrayList<String> searchResultArray = null;
    private ArrayList<String> updateResultArray = null;

    public String getUpdateEmailAddress() {
        return updateEmailAddress;
    }

    public void setUpdateEmailAddress(String updateEmailAddress) {
        this.updateEmailAddress = updateEmailAddress;
    }

    public String getCompanyName() {
        return companyName;
    }

    public void setCompanyName(String companyName) {
        this.companyName = companyName;
    }

    public String getFirstName() {
        return firstName;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    public String getLastName() {
        return lastName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

    public String getEmailAddress() {
        return emailAddress;
    }

    public void setEmailAddress(String emailAddress) {
        this.emailAddress = emailAddress;
    }

    public String getReTypeEmailAddress() {
        return reTypeEmailAddress;
    }

    public void setReTypeEmailAddress(String reTypeEmailAddress) {
        this.reTypeEmailAddress = reTypeEmailAddress;
    }

    public String getStreet() {
        return street;
    }

    public void setStreet(String street) {
        this.street = street;
    }

    public String getNumber() {
        return number;
    }

    public void setNumber(String number) {
        this.number = number;
    }

    public String getAdditive() {
        return additive;
    }

    public void setAdditive(String additive) {
        this.additive = additive;
    }

    public String getZipCode() {
        return zipCode;
    }

    public void setZipCode(String zipCode) {
        this.zipCode = zipCode;
    }

    public String getCity() {
        return city;
    }

    public void setCity(String city) {
        this.city = city;
    }

    public JTextField getJTextFieldUpdateEmailAddress() {
        return jTextFieldUpdateEmailAddress;
    }

    public void setJTextFieldUpdateEmailAddress(JTextField updateEmailAddress) {
        this.jTextFieldUpdateEmailAddress = updateEmailAddress;
    }

    public JTextField getJTextFieldCompanyName() {
        return jTextFieldCompanyName;
    }

    public void setJTextFieldCompanyName(JTextField companyName) {
        this.jTextFieldCompanyName = companyName;
    }

    public JTextField getJTextFieldFirstName() {
        return jTextFieldFirstName;
    }

    public void setJTextFieldFirstName(JTextField fName) {
        this.jTextFieldFirstName = fName;
    }

    public JTextField getJTextFieldLastName() {
        return jTextFieldLastName;
    }

    public void setJTextFieldLastName(JTextField lastName) {
        this.jTextFieldLastName = lastName;
    }

    public JTextField getJTextFieldEmailAddress() {
        return jTextFieldEmailAddress;
    }

    public void setJTextFieldEmailAddress(JTextField emailAddress) {
        this.jTextFieldEmailAddress = emailAddress;
    }

    public JTextField getJTextFieldReTypeEmailAddress() {
        return jTextFieldReTypeEmailAddress;
    }

    public void setJTextFieldReTypeEmailAddress( JTextField reTypeEmailAddress) {
        this.jTextFieldReTypeEmailAddress = reTypeEmailAddress;
    }

    public JTextField getJTextFieldStreet() {
        return jTextFieldStreetName;
    }

    public void setJTextFieldStreet(JTextField streetName) {
        this.jTextFieldStreetName = streetName;
    }

    public JTextField getJTextFieldHouseNumber() {
        return jTextFieldHouseNumber;
    }

    public void setJTextFieldHouseNumber(JTextField houseNumber) {
        this.jTextFieldHouseNumber = houseNumber;
    }

    public JTextField getJTextfieldAdditive() {
        return jTextFieldAdditive;
    }

    public void setJTextFieldAdditive(JTextField additive) {
        this.jTextFieldAdditive = additive;
    }

    public JTextField getJTextFieldZipCode() {
        return jTextFieldZipCode;
    }

    public void setJTexFieldZipCode(JTextField zipCode) {
        this.jTextFieldZipCode = zipCode;
    }

    public JTextField getJTextFieldCity() {
        return jTextFieldCityName;
    }

    public void setJTextFieldCity(JTextField cityName){
        this.jTextFieldCityName = cityName;
    }

    public JTextField getJTextFieldSearchEmailAddress(){
        return jTextFieldSearchEmailAddress;
    }

    public void setJTextFieldSearchEmailAddress(JTextField searchEmailAddress) {
        this.jTextFieldSearchEmailAddress = searchEmailAddress;
    }

    public JTextField getJTextFieldRemoveEmailAddress(){
        return jTextFieldRemoveEmailAddress;
    }

    public void setJTextFieldRemoveEmailAddress(JTextField removeEAddress){
        this.jTextFieldRemoveEmailAddress = removeEAddress;
    }

    public ArrayList<String> getSearchResultArray() {
        return searchResultArray;
    }

    public void setSearchResultArray(ArrayList searchResultArray) {
        this.searchResultArray = searchResultArray;
    }

    public ArrayList<String> getUpdateResultArray() {
        return updateResultArray;
    }

    public void setUpdateResultArray(ArrayList searchResultArray) {
        this.updateResultArray = searchResultArray;
    }
}

这里是我的 ActionListener 类之一，我有 4 个类来在我的数据库上执行创建、读取、更新和删除。

 public class MainWindowActionListenerAddMVCVIEW implements ActionListener {

    WolffAddressManagerMVCMODEL model = new WolffAddressManagerMVCMODEL();
    WolffAddressManagerMVCController controller = new WolffAddressManagerMVCController(model);
    public MainWindowActionListenerAddMVCVIEW(JTextField fName, JTextField lName, JTextField eAddress, JTextField streetName, JTextField houseNumber, JTextField add, JTextField zCode, JTextField cityName) {

        this.model.setJTextfiedFirstName(fName);
        this.model.setJTextFieldLastName(lName);
        this.model.setJTextFieldEmailAddress(eAddress);
        this.model.setJTextFieldStreet(streetName);
        this.model.setJTextFieldHouseNumber(houseNumber);
        this.model.setJTextFieldAdditive(add);
        this.model.setJTexFieldZipCode(zCode);
        this.model.setJTextFieldCity(cityName);

    }


    @Override
    public void actionPerformed(ActionEvent e) {
        model.setFirstName(model.getJTextFieldFirstName().getText());
        model.setLastName(model.getJTextFieldLastName().getText());
        model.setEmailAddress(model.getJTextFieldEmailAddress().getText());
        model.setStreet(model.getJTextFieldStreet().getText());
        model.setNumber(model.getJTextFieldHouseNumber().getText());
        model.setAdditive(model.getJTextfieldAdditive().getText());
        model.setZipCode(model.getJTextFieldZipCode().getText());
        model.setCity(model.getJTextFieldCity().getText());
        try {
            controller.saveAddressToDataBase(this);
        } catch (Exception ex) {
            Logger.getLogger(MainWindowActionListenerAddMVCVIEW.class.getName()).log(Level.SEVERE, null, ex);
        }

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