Java：将对话框文本字段中的数据复制到JTable

时间：2015-03-15 15:12:28

标签： java swing jtable dialog

此项目要求用户将数据输入到从菜单栏访问的对话框的文本字段中，并将文本字段中的数据放入JTable中。问题是，在将信息放入文本字​​段后，一旦用户在对话框上单击“确定”，该对话框将不再可见，但JTable中不会显示任何内容。 JTable标头在那里，但刚刚提交的信息不是。

这是一个露营注册程序，所有课程都可以编译好。我只是首先从房车预订中获取信息，但最终会为帐篷预订做同样的事情。以下是与RV签入对应的类。有一个RV构造函数，它有参数（String（name），String（check in day），int（days stay），String（leave day），int（site number） ，int（需要电力））。 首先是对话框类：

package campingPrj;

import java.awt.*;
import java.awt.event.*;

import javax.swing.*;

public class DialogCheckInRv extends javax.swing.JDialog implements ActionListener {

private static final long serialVersionUID = 1L;
private javax.swing.JTextField nameTxt;
private javax.swing.JTextField dateIn;
private javax.swing.JTextField stayingTxt;
private javax.swing.JTextField siteNumberTxt;
private javax.swing.JTextField checkOutDate;
private javax.swing.JTextField powerTxt;
private javax.swing.JButton okButton;
private javax.swing.JButton cancelButton;
private boolean cancel;
private boolean okay;


public DialogCheckInRv(java.awt.Frame parent) {
    super(parent, true);
    setupDialog();
    setTitle("RV Check In");
}


private void setupDialog() {
    setDefaultCloseOperation(javax.swing.WindowConstants.DO_NOTHING_ON_CLOSE);

    nameTxt = new javax.swing.JTextField(27);
    dateIn = new javax.swing.JTextField(25);
    stayingTxt = new javax.swing.JTextField(25);
    siteNumberTxt = new javax.swing.JTextField(27);
    powerTxt = new javax.swing.JTextField(27);

    okButton = new javax.swing.JButton("Ok");
    okButton.addActionListener(this);
    cancelButton = new javax.swing.JButton("Cancel");
    cancelButton.addActionListener(this);

    setLayout(new GridLayout(6, 1));

    JPanel panel = new JPanel(new FlowLayout(FlowLayout.LEFT));
    panel.add(new JLabel("Name Reserving:"));
    panel.add(nameTxt);
    add(panel);

    panel = new JPanel(new FlowLayout(FlowLayout.LEFT));
    panel.add(new JLabel("Start Date (mm/dd/yy) :"));
    panel.add(dateIn);
    add(panel);

    panel = new JPanel(new FlowLayout(FlowLayout.LEFT));
    panel.add(new JLabel("Days Planning on Staying:"));
    panel.add(stayingTxt);
    add(panel);

    panel = new JPanel(new FlowLayout(FlowLayout.LEFT));
    panel.add(new JLabel("Requested Site Number:"));
    panel.add(siteNumberTxt);
    add(panel);

    panel = new JPanel(new FlowLayout(FlowLayout.LEFT));
    panel.add(new JLabel("Power Needed (in AMPs):"));
    panel.add(powerTxt);
    add(panel);


    panel = new JPanel();
    panel.add(okButton);
    panel.add(cancelButton);
    add(panel);

    pack();
    setLocationRelativeTo(null);
}

public void actionPerformed(java.awt.event.ActionEvent event) {
    if (event.getSource() == okButton) {
        okay = true;
        cancel = false;
        setVisible(false);
    }
    if (event.getSource() == cancelButton) {
        okay = false;
        cancel = true;
        setVisible(false);
    }
}

public boolean isOk() {
    return okay;
}

public boolean isCancel() {
    return cancel;
}

public String getName() {
    return nameTxt.getText();
}

public String getDateIn() {
    return dateIn.getText();
}

public String getDaysStaying() {
    return stayingTxt.getText();
}

public String getCheckOutDate() {
    return checkOutDate.getText();
}

public String getPower() {
    return powerTxt.getText();
}

public String getSiteNumber() {
    return siteNumberTxt.getText();
}

public void clear() {
    nameTxt.setText(null);
    dateIn.setText(null);
    stayingTxt.setText(null);
    dateIn.setText(null);
    powerTxt.setText(null);
    siteNumberTxt.setText(null);
}

}

带有表格的GUI（我猜测问题的地方在actionPerformed方法中）：

 package campingPrj;

 import java.awt.BorderLayout;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;

 import javax.swing.*;

 @SuppressWarnings("serial")
 public class GUICampingReg extends javax.swing.JFrame implements ActionListener {

private JMenuItem openSerialFileItem = new JMenuItem("Open Serialized File");
private JMenuItem openTextFileItem = new JMenuItem("Open Text File");
private JMenuItem saveSerialFileItem = new JMenuItem("Save Serialized File");
private JMenuItem saveTextFileItem = new JMenuItem("Save Text File");
private JMenuItem exitItem = new JMenuItem("Exit");
private JMenuItem checkInTentItem = new JMenuItem("Check in tent");
private JMenuItem checkInRVItem = new JMenuItem("Check in RV");
private JMenuItem checkOutItem = new JMenuItem("Date Leaving");

private JTextField nameReservingTxt;
private JTextField dateInTxt;
private JTextField daysStayingTxt;
private JTextField checkOutOnTxt;
private JTextField siteNumberTxt;
private JTextField powerTxt;

private JFrame frame;
private JTable table;
private SiteModel model;
private JScrollPane scrollPane;
private DialogCheckInRv newRv;

public GUICampingReg() {
    setupFrame();
    newRv = new DialogCheckInRv(this);
    model = new SiteModel();
    table.setModel(model);
}

private void setupFrame() {
    frame = new JFrame();
    frame.setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
    frame.setTitle("Camping Registration Program");

    scrollPane = new JScrollPane();
    table = new JTable();

    JMenuBar menubar = new JMenuBar();

    JMenu fileMenu = new JMenu("File");
    fileMenu.add(openSerialFileItem);
    fileMenu.add(openTextFileItem);
    fileMenu.add(saveSerialFileItem);
    fileMenu.add(saveTextFileItem);
    fileMenu.add(exitItem);

    JMenu checkInMenu = new JMenu("Check In");
    checkInMenu.add(checkInRVItem);
    checkInMenu.add(checkInTentItem);

    JMenu checkOutMenu = new JMenu("Check Out");
    checkOutMenu.add(checkOutItem);

    menubar.add(fileMenu);
    menubar.add(checkInMenu);
    menubar.add(checkOutMenu);

    openSerialFileItem.addActionListener(this);
    openTextFileItem.addActionListener(this);
    saveSerialFileItem.addActionListener(this);
    saveTextFileItem.addActionListener(this);
    exitItem.addActionListener(this);
    checkInTentItem.addActionListener(this);
    checkInRVItem.addActionListener(this);
    checkOutItem.addActionListener(this);

    frame.setJMenuBar(menubar);

    scrollPane
            .setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
    table.setToolTipText("");
    table.setSelectionMode(javax.swing.ListSelectionModel.SINGLE_SELECTION);
    table.getTableHeader().setReorderingAllowed(false);
    table.addMouseListener(new java.awt.event.MouseAdapter() {
        public void mouseClicked(java.awt.event.MouseEvent evt) {
            tableMouseClicked();
        }

    });

    scrollPane.setViewportView(table);
    frame.add(scrollPane, BorderLayout.CENTER);

    frame.pack();
    frame.setLocationRelativeTo(null);
    frame.setVisible(true);
}

private void tableMouseClicked() {
    // TODO Auto-generated method stub

}

public void actionPerformed(ActionEvent evt) {
    Object pressed = evt.getSource();

    if (pressed == exitItem) {
        System.exit(0);
    }
    if (pressed == openSerialFileItem) {

    }
    if (pressed == openTextFileItem) {

    }
    if (pressed == saveSerialFileItem) {

    }
    if (pressed == saveTextFileItem) {

    }
    if (pressed == checkInTentItem) {

    }
    if (pressed == checkInRVItem) {
        newRv.clear();
        newRv.setVisible(true);
        if (newRv.isOk()) {
            String nameReserving = nameReservingTxt.getText();
            String checkIn = dateInTxt.getText();
            int daysStaying = Integer.parseInt(daysStayingTxt.getText());
            String checkOutOn = checkOutOnTxt.getText();
            int siteNumber = Integer.parseInt(siteNumberTxt.getText());
            int power = Integer.parseInt(powerTxt.getText());
            RV rv = new RV (nameReserving, checkIn, daysStaying, checkOutOn, siteNumber, power);
            model.add(rv);
        }

    }
    if (pressed == checkOutItem) {

    }

}

public static void main(String args[]) {
    SwingUtilities.invokeLater(new Runnable() {
        public void run() {
            new GUICampingReg();
        }
    });
}

}

网站模型类：

package campingPrj;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.ArrayList;

import javax.swing.table.AbstractTableModel;

public class SiteModel extends AbstractTableModel {

private static final long serialVersionUID = 1L;
private ArrayList<Site> listSites;
private String[] columnNames = { "Name Reserving", "Checked in Date",
        "Days Staying", "Site #", "Tenters/RV Power Needed" };

public SiteModel() {
    listSites = new ArrayList<Site>();
}

public String getColumnName(int col) {
    return columnNames[col];
}

public int getColumnCount() {
    return columnNames.length;
}

public int getRowCount() {
    return listSites.size();
}

public Object getValueAt(int row, int col) {
    Object val = null;
    switch (col) {
    case 0:
        val = listSites.get(row).getNameReserving();
        break;
    case 1:
        val = listSites.get(row).getCheckIn();
        break;
    case 2:
        val = listSites.get(row).getDaysStaying();
        break;
    case 3:
        val = listSites.get(row).getSiteNumber();
        break;
    case 4:
        val = listSites.get(row).getCheckOutOn();
        break;

    }
    return val;
}

public Site get(int index) {
    return listSites.get(index);
}

public int indexOf(Site s) {
    return listSites.indexOf(s);
}

public void add(Site s) {
    if (s != null) {
        listSites.add(s);
        fireTableRowsInserted(listSites.size() - 1, listSites.size() - 1);
    }
}

public void add(int index, Site s) {
    if (s != null) {
        listSites.add(index, s);
        fireTableRowsInserted(index, index);
    }
}

public void remove(int index) {
    listSites.remove(index);
    fireTableRowsDeleted(index, index);
    return;
}

public void remove(Site s) {
    remove(indexOf(s));
}

public void saveAsSerialized(String filename) throws IOException {
    FileOutputStream fos = new FileOutputStream(filename);
    ObjectOutputStream os = new ObjectOutputStream(fos);
    os.writeObject(listSites);
    os.close();
}

@SuppressWarnings("unchecked")
public void loadFromSerialized(String filename) throws IOException,
        ClassNotFoundException {
    FileInputStream fis = new FileInputStream(filename);
    ObjectInputStream is = new ObjectInputStream(fis);
    listSites = (ArrayList<Site>) is.readObject();
    is.close();
}

}

那么，我如何获得在JTable中显示的信息？

1 个答案:

答案 0 :(得分：2)

也许我误解了你的代码，但是我没有看到你在哪里提取用户输入对话框的信息。例如：

    if (newRv.isOk()) {
        String nameReserving = nameReservingTxt.getText();
        String checkIn = dateInTxt.getText();
        int daysStaying = Integer.parseInt(daysStayingTxt.getText());
        String checkOutOn = checkOutOnTxt.getText();
        int siteNumber = Integer.parseInt(siteNumberTxt.getText());
        int power = Integer.parseInt(powerTxt.getText());
        RV rv = new RV (nameReserving, checkIn, daysStaying, checkOutOn, siteNumber, power);
        model.add(rv);
    }

您似乎是从GUICampingReg持有的字段中提取信息，而不是从newRv对象中提取信息。你不应该调用newRv的方法来提取创建RV对象所需的数据吗？

例如，

    if (newRv.isOk()) {
        String nameReserving = newRv.getName();
        String checkIn = newRv.getDateIn();

        // .... etc

        RV rv = new RV (nameReserving, checkIn, daysStaying, checkOutOn, siteNumber, power);
        model.add(rv);
    }
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