Java JTextPane RTF Save

问题

i have the following code trying to save the contents of a JTextPane as RTF. although a file is created in the following code but it is empty!

any tips regarding what am i doing wrong? (as usual dont forget im a beginner!)

if (option == JFileChooser.APPROVE_OPTION) {
////////////////////////////////////////////////////////////////////////
//System.out.println(chooser.getSelectedFile().getName());

//System.out.println(chooser.getSelectedFile().getAbsoluteFile());
///////////////////////////////////////////////////////////////////////////

StyledDocument doc = (StyledDocument)textPaneHistory.getDocument();
RTFEditorKit kit = new RTFEditorKit();

BufferedOutputStream out;

try {
     out = new BufferedOutputStream(new FileOutputStream(chooser.getSelectedFile().getName()));

     kit.write(out, doc, doc.getStartPosition().getOffset(), doc.getLength());
} catch (FileNotFoundException e) {
} catch (IOException e){
} catch (BadLocationException e){
}
}

EDIT: HTMLEditorKit if i use HTMLEditorKit it works and thats what i really wanted. SOLVED!

回答1:

            if (textPaneHistory.getText().length() > 0){

            JFileChooser chooser = new JFileChooser();
            chooser.setMultiSelectionEnabled(false);

            int option = chooser.showSaveDialog(ChatGUI.this);

            if (option == JFileChooser.APPROVE_OPTION) {

                StyledDocument doc = (StyledDocument)textPaneHistory.getDocument();

                HTMLEditorKit kit = new HTMLEditorKit();

                BufferedOutputStream out;

                try {
                    out = new BufferedOutputStream(new FileOutputStream(chooser.getSelectedFile().getAbsoluteFile()));

                    kit.write(out, doc, doc.getStartPosition().getOffset(), doc.getLength());

                } catch (FileNotFoundException e) {

                } catch (IOException e){

                } catch (BadLocationException e){

                }
            }
        }

here is the solution. it works if HTMLEditorKit is used.

回答2:

Here is a solution for RTF and not HTML.

As RTF is not standardized, I needed some additional tags like \sb and \sa to force my Wordpad to display the file properly.

protected void exportToRtf() throws IOException, BadLocationException {
    final StringWriter out = new StringWriter();
    Document doc = textPane.getDocument();
    RTFEditorKit kit = new RTFEditorKit();
    kit.write(out, doc, doc.getStartPosition().getOffset(), doc.getLength());
    out.close();

    String rtfContent = out.toString();
    {
    // replace "Monospaced" by a well-known monospace font
    rtfContent = rtfContent.replaceAll("Monospaced", "Courier New");
    final StringBuffer rtfContentBuffer = new StringBuffer(rtfContent);
    final int endProlog = rtfContentBuffer.indexOf("\n\n");
    // set a good Line Space and no Space Before or Space After each paragraph
    rtfContentBuffer.insert(endProlog, "\n\\sl240");
    rtfContentBuffer.insert(endProlog, "\n\\sb0\\sa0");
    rtfContent = rtfContentBuffer.toString();
    }

    final File file = new File("c:\\temp\\test.rtf");
    final FileOutputStream fos = new FileOutputStream(file);
    fos.write(rtfContent.toString().getBytes());
    fos.close();
}

回答3:

This is how I did when I faced the same problem.

    public void actionPerformed(ActionEvent e) {

        text = textPane.getText();
        JFileChooser saveFile = new JFileChooser();
        int option = saveFile.showSaveDialog(null);
        saveFile.setDialogTitle("Save the file...");

        if (option == JFileChooser.APPROVE_OPTION) {

            File file = saveFile.getSelectedFile();
            if (!file.exists()) {

                try {
                    BufferedWriter writer = new BufferedWriter(
                            new FileWriter(file.getAbsolutePath() + ".rtf"));
                    writer.write(text);
                    writer.close();

                } catch (IOException ex) {

                    ex.printStackTrace();
                    System.out.println(ex.getMessage());
                    JOptionPane.showMessageDialog(null,
                            "Failed to save the file");
                }

            }

            else if (file.exists()) {

                int confirm = JOptionPane.showConfirmDialog(null,
                        "File exists do you want to save anyway?");
                if (confirm == 0) {

                    try {
                        BufferedWriter writer = new BufferedWriter(
                                new FileWriter(file.getAbsolutePath()
                                        + ".rtf"));
                        writer.write(text);
                        writer.close();

                    } catch (IOException ex) {

                        ex.printStackTrace();
                        System.out.println(ex.getMessage());
                        JOptionPane.showMessageDialog(null,
                                "Failed to save the file");
                    }

                }

                else if (confirm == 1) {

                    JOptionPane.showMessageDialog(null,
                            "The file was not saved.");

                }

            }

        }

        if (option == JFileChooser.CANCEL_OPTION) {

            saveFile.setVisible(false);

        }

    }// End of method

回答4:

The only problem I've seen in your code is that you're not closing the output stream (when content is actually written to disk).

Try out.close().

It should solve your problem.

来源：https://stackoverflow.com/questions/2725141/java-jtextpane-rtf-save