JEditorPane/JTextPane常见操作（字体，颜色，字号，加粗，斜线，下划线，保存，行间距 等操作）以及HTML空格处理

 

 

 

使用HTML的文档格式：

HTMLEditorKit editorKit = new HTMLEditorKit();
HTMLDocument  document = (HTMLDocument) editorKit.createDefaultDocument();

textPane = new JTextPane(document);
textPane.setContentType("text/html");

 

JEditorPane已经提供了字体，颜色，字号，加粗等基本操作的Action

Action[] actions = TextAction.augmentList(editorPane.getActions(), defaultActions);

commands = new Hashtable();

for(int i = 0; i < actions.length; i++)
 {
Action a = actions[i];
commands.put(a.getValue(Action.NAME), a);
}

 

//函数，返回Action

    protected Action getAction(String cmd)
    {
        return (Action) commands.get(cmd);
    }

 

Action boldAction = this.getAction("font-bold");

 

Action copyAction = this.getAction("copy-to-clipboard");
Action cutAction = this.getAction("cut-to-clipboard");
Action pasteAction = this.getAction("paste-from-clipboard");
Action boldAction = this.getAction("font-bold");
Action italicAction = this.getAction("font-italic");
Action underlineAction = this.getAction("font-underline");
Action leftAction = this.getAction("left-justify");
Action centerAction = this.getAction("center-justify");
Action rightAction = this.getAction("right-justify");

 

//颜色：

ActionListener colorActionListener = new StyledEditorKit.ForegroundAction("set-foreground-", color);
colorActionListener.actionPerformed(new ActionEvent(editorPane, 0, ""));

 

//行间距：

if(editorPane instanceof JTextPane)
{
 StyledDocument doc = ((JTextPane) editorPane).getStyledDocument();
 MutableAttributeSet attr = new SimpleAttributeSet();
 StyleConstants.setLineSpacing(attr, (float) DoubleUtil.getAsDouble(t));
 doc.setParagraphAttributes(editorPane.getSelectionStart(), editorPane.getSelectionEnd(), attr, false);

}

 

//插入图片（针对JTextPane）：

((JTextPane)editorPane).insertIcon(new ImageIcon(file.getPath()));

 

//保存(随机一个文件名):

BufferedInputStream d = (BufferedInputStream) this.getPage().getContent();
        byte[] c = new byte[d.available()];
        d.read(c);
        HTMLDocument doc = (HTMLDocument) this.getDocument();
        Random rand = new Random();
        int t = rand.nextInt();
        File f = new File("m" + t + ".html");
        FileOutputStream fstrm = new FileOutputStream(f);
        ObjectOutput ostrm = new ObjectOutputStream(fstrm);
        ostrm.writeObject(this.getDocument());
        ostrm.flush();

   jtextpanel

              FileOutputStream fstrm = new FileOutputStream(file);
            ObjectOutput ostrm = new ObjectOutputStream(fstrm);
            ostrm.writeObject(this.getDocument());
           
           
            Log.info(this.getDocument().getText(0, this.getDocument().getLength()));
           
           
            ostrm.flush();

 

 

 

//打开JEditorPane

this.setPage("file:///" + f.getAbsolutePath());

JTextPanel

File f = new File("temptextpanelfile");
            FileInputStream fin = new FileInputStream(f);
            ObjectInputStream istrm = new ObjectInputStream(fin);
            Document doc = (Document) istrm.readObject();
            if(this.getDocument() != null)
                this.getDocument().removeUndoableEditListener(toolbar.undoHandler);
            this.setDocument(doc);
            doc.addUndoableEditListener(toolbar.undoHandler);
            resetUndoManager();
            validate();
            istrm.close();
            fin.close();
           
            f.delete();

 

 

 

一般来说使用JEditorPane时使用setPage(url)来显示，储存时存为文件。

在我的应用中，我不想存为文件，我想得到完整的HTML格式的字符。所以我使用getText()(不要用document来返回)来返回字符，用setText来显示，基本上差不多，但有个问题就是用getText返回时会自动去掉你输入的空格。搞死人，Google上猛搜索了一下后得到如下解决方法：

//新建一个DocumentFilter

public class CustDocumentFilter extends DocumentFilter
{
    static String space = " ";
    static String spaceSeq = "\240";
    static String tab = "\t";
    static String tabSeq = "\240\240\240\240";

    // important: always overwrite all three methods
    public void insertString(DocumentFilter.FilterBypass fb, int offset, String string, AttributeSet attr)
            throws BadLocationException
    {
        string = doFiltering(string);
        fb.insertString(offset, string, attr);
    }
    public void remove(DocumentFilter.FilterBypass fb, int offset, int length) throws BadLocationException
    {
        fb.remove(offset, length);
    }

    public void replace(DocumentFilter.FilterBypass fb, int offset, int length, String text, AttributeSet attrs)
            throws BadLocationException
    {
        text = doFiltering(text);
        fb.replace(offset, length, text, attrs);
    }
    private String doFiltering(String in)
    {
        String out = in.replaceAll(space, spaceSeq);
        return out.replaceAll(tab, tabSeq);
    }
}

然后使用

((HTMLDocument)this.getDocument()).setDocumentFilter(new CustDocumentFilter());

这样就可以避免你输入的空格别吃掉了。

我的QQ: 

 

下边是一个JTextPanel的基本应用：