-1

FileWriter と PrintWriter を使用して、テキストペインにあるものを保存しようとしています。

// Save file
    fileItem2.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            System.out.println("Pressed menu item! Save");
            jStyledTextPane.setText("Pressed menu item! Save");
        }
    });

私はすでにファイルを開く方法を持っており、テキストペインに表示されるテキストを同じにしようとしています。 これは私の完全なコードです:

public class CSC9V4TextEditor implements ActionListener {

private JStyledTextPane jStyledTextPane;

private JMenuBar menubar() {

    // Initialising JMenu.
    JMenuBar menubar = new JMenuBar();

    // Creating the Menus.
    JMenu filemenu = new JMenu("File");
    filemenu.add(new JSeparator());

    // Creating the sub Menus.
    JMenuItem fileItem1 = new JMenuItem("Open");
    JMenuItem fileItem2 = new JMenuItem("Save");
    JMenuItem fileItem3 = new JMenuItem("Exit");
    fileItem3.add(new JSeparator());

    // Adding the sub Menus to the File menu.
    filemenu.add(fileItem1);
    filemenu.add(fileItem2);
    filemenu.add(fileItem3);

    // Adding the sub Menus to the Edit menu.
    menubar.add(filemenu);

    // Exit action
    fileItem3.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            System.out.println("Exit");
            System.exit(0);
        }
    });

    // open file
    fileItem1.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            JFileChooser chooser = new JFileChooser();
            Component parent = null;
            int returnVal = chooser.showOpenDialog(parent);
            if (returnVal == JFileChooser.APPROVE_OPTION) {
                System.out.println("You chose to open this file: "
                        + chooser.getSelectedFile().getName());
                File file = chooser.getSelectedFile();
                try {
                    BufferedReader br = null;
                    String sCurrentLine;
                    br = new BufferedReader(new FileReader(file
                            .getAbsoluteFile()));
                    while ((sCurrentLine = br.readLine()) != null) {
                        jStyledTextPane.read(br, null);
                    }
                } catch (IOException e1) {
                    System.out.println("problem accessing file"
                            + file.getAbsolutePath());
                }
            }
            // jStyledTextPane.setText("You chose to open this file: "
            // + chooser.getSelectedFile().getName());
        }
    });

    // Save file
    fileItem2.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            System.out.println("Pressed menu item! Save");
            jStyledTextPane.setText("Pressed menu item! Save");
        }
    });

    return menubar;
}

private void initialiseGUI() {

    // Create the frame.
    JFrame frame = new JFrame("CSC9V4 Text Editor");

    // Set the exit button.
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    // Adding the menu bar to the frame.
    frame.setJMenuBar(menubar());

    // Size the frame.
    frame.setSize(600, 600);

    // Show the frame.
    frame.setVisible(true);

    jStyledTextPane = new JStyledTextPane();

    // Adding the JStyledTextPane to the frame.
    frame.add(jStyledTextPane);
}

@SuppressWarnings("unused")
public static void main(String[] args) {
    CSC9V4TextEditor TextEditor = new CSC9V4TextEditor();
}

public CSC9V4TextEditor() {
    initialiseGUI();
}

@Override
public void actionPerformed(ActionEvent e) {
    // TODO Auto-generated method stub

}

}

4

1 に答える 1

2

の内容を保存するには、適切なシリアル化の方法を使用してファイルに保存JTextPaneできます。また、コンテンツを再度ロードしたい場合は、同じように に表示できます。以下のコードを検討してください。serializeDefaultStyledDocumentJTextPanedeserializeJTextPane

import javax.swing.*;
import javax.swing.text.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;

public class SaveEditor extends JFrame implements ActionListener{
     public static final String text = "As told by Wikipedia\n"
    +"Java is a general-purpose, concurrent, class-based, object-oriented computer programming language."
    + "It is specifically designed to have as few implementation "
    + "dependencies as possible. It is intended to let application developers write once, run anywhere (WORA), "
    + "meaning that code that runs on one platform does not need to be recompiled to run on another. "
    + "Java applications are typically compiled to bytecode (class file) that can run on any Java virtual "
    + "machine (JVM) regardless of computer architecture. Java is, as of 2012, one of the most popular programming "
    + "languages in use, particularly for client-server web applications, with a reported 10 million users.";
    JTextPane pane ;
    DefaultStyledDocument doc ;
    StyleContext sc;
    JButton save;
    JButton load;
    public static void main(String[] args) 
    {
        try 
        {
            UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
            SwingUtilities.invokeLater(new Runnable()
            {
                public void run()
                {
                    SaveEditor se = new SaveEditor();
                    se.createAndShowGUI();
                }
            });
        } catch (Exception evt) {}
    }
    public void createAndShowGUI()
    {
        setTitle("TextPane");
        sc = new StyleContext();
        doc = new DefaultStyledDocument(sc);
        pane = new JTextPane(doc);
        save = new JButton("Save");
        load = new JButton("Load");
        JPanel panel = new JPanel();
        panel.add(save);panel.add(load);
        save.addActionListener(this);load.addActionListener(this);
        final Style heading2Style = sc.addStyle("Heading2", null);
        heading2Style.addAttribute(StyleConstants.Foreground, Color.red);
        heading2Style.addAttribute(StyleConstants.FontSize, new Integer(16));
        heading2Style.addAttribute(StyleConstants.FontFamily, "serif");
        heading2Style.addAttribute(StyleConstants.Bold, new Boolean(true));
        try 
        {
            doc.insertString(0, text, null);
            doc.setParagraphAttributes(0, 1, heading2Style, false);
        } catch (Exception e) 
        {
            System.out.println("Exception when constructing document: " + e);
            System.exit(1);
        }
        getContentPane().add(new JScrollPane(pane));
        getContentPane().add(panel,BorderLayout.SOUTH);
        setSize(400, 300);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setVisible(true);
    }
    public void actionPerformed(ActionEvent evt)
    {
        if (evt.getSource() == save)
        {
            save();
        }
        else if (evt.getSource() == load)
        {
            load();
        }
    }
    private void save()//Saving the contents .
    {
        JFileChooser chooser = new JFileChooser(".");
        chooser.setDialogTitle("Save");
        int returnVal = chooser.showSaveDialog(this);
        if(returnVal == JFileChooser.APPROVE_OPTION) 
        {
            File file = chooser.getSelectedFile();
            if (file != null)
            {
                FileOutputStream fos = null;
                ObjectOutputStream os = null;
                try
                {
                    fos = new FileOutputStream(file);
                    os = new ObjectOutputStream(fos);
                    os.writeObject(doc);
                    JOptionPane.showMessageDialog(this,"Saved successfully!!","Success",JOptionPane.INFORMATION_MESSAGE);
                }
                catch (Exception ex)
                {
                    ex.printStackTrace();
                }
                finally
                {
                    if (fos != null)
                    {
                        try
                        {
                            fos.close();
                        }
                        catch (Exception ex){}

                    }
                    if (os != null)
                    {
                        try
                        {
                            os.close();
                        }
                        catch (Exception ex){}

                    }
                }
            }
            else 
            {
                JOptionPane.showMessageDialog(this,"Please enter a fileName","Error",JOptionPane.ERROR_MESSAGE);
            }
        }
    }
    private void load()//Loading the contents
    {
        JFileChooser chooser = new JFileChooser(".");
        chooser.setDialogTitle("Open");
        chooser.setFileSelectionMode(JFileChooser.FILES_ONLY);
        int returnVal = chooser.showOpenDialog(this);
        if(returnVal == JFileChooser.APPROVE_OPTION) 
        {
            File file = chooser.getSelectedFile();
            if (file!= null)
            {
                FileInputStream fin = null;
                ObjectInputStream ins = null;
                try
                {
                    fin = new FileInputStream(file);
                    ins = new ObjectInputStream(fin);
                    doc = (DefaultStyledDocument)ins.readObject();
                    pane.setStyledDocument(doc);
                    JOptionPane.showMessageDialog(this,"Loaded successfully!!","Success",JOptionPane.INFORMATION_MESSAGE);
                }
                catch (Exception ex)
                {
                    ex.printStackTrace();
                }
                finally
                {
                    if (fin != null)
                    {
                        try
                        {
                            fin.close();
                        }
                        catch (Exception ex){}

                    }
                    if (ins != null)
                    {
                        try
                        {
                            ins.close();
                        }
                        catch (Exception ex){}

                    }
                }
            }
            else 
            {
                JOptionPane.showMessageDialog(this,"Please enter a fileName","Error",JOptionPane.ERROR_MESSAGE);
            }
        }
    }

}
于 2013-03-19T14:52:31.227 に答える