Java JTextPane HTML Editor UTF-8 characters encodi

问题:

I'm using JTextPane as simple html editor.

jtp=new JTextPane();
jtp.setContentType("text/html;charset=UTF-8");
jtp.setEditorKit(new HTMLEditorKit());

When I call jtp.getText() I get nice html code with all special chars escaped. But I don't want escape national characters (polish) but only special html chars like &, <, > When I enter in editor

<foo>ą ś &

I get

<foo>ą ś &

but I would like get

<foo>ą ś &

How it is possile?

回答1:

That's not possible, unfortunately.

There's a flaw inside javax.swing.text.html.HTMLWriter -- it is hardcoded to convert any symbol that is not ASCII to its numeric representation:

default:
    if (chars[counter] < ' ' || chars[counter] > 127) {
        if (counter > last) {
            super.output(chars, last, counter - last);
        }
        last = counter + 1;
        // If the character is outside of ascii, write the
        // numeric value.
        output("&#");
        output(String.valueOf((int)chars[counter]));
        output(";");
    }
    break;
}

This logic cannot be controlled in any way.

BUT If you really really need that functionality you could do the crazy stuff:

1. copy and paste HTMLWriter sources into HTMLWriterHack (in the same package javax.swing.text.html and renaming all strings inside)
2. Replace the above listed three output lines with something like output(String.valueOf(chars[counter]));
3. copy and paste HTMLDocument sources into HTMLDocumentHack (in the same package javax.swing.text.html, renaming all strings inside, making it extend HTMLDocument and removing clashing methods)
4. Use the CustomEditorKit listed below instead of HTMLEditorKit

---

class CustomEditorKit extends HTMLEditorKit {
    @Override
    public void write(Writer out, Document doc, int pos, int len) throws IOException, BadLocationException {
        HTMLWriterHack writer = new HTMLWriterHack(out, (HTMLDocumentHack) doc);
        writer.write();
    }
    @Override
    public Document createDefaultDocument() {
        StyleSheet styles = getStyleSheet();
        StyleSheet ss = new StyleSheet();
        ss.addStyleSheet(styles);
        HTMLDocumentHack doc = new HTMLDocumentHack(ss);
        doc.setParser(getParser());
        doc.setAsynchronousLoadPriority(4);
        doc.setTokenThreshold(100);
        return doc;
    }
}

---

Although the steps above work (I tested it), I certainly wouldn't recommend doing that.

回答2:

It is not possible, all characters above code 127 are translated to a numeric entity & # number ;. The HTML-entities are translated into named entities & lt ; , and so on. So you may easily resubstitute them. (This is done in HTMLWriter.output, and there seems to be no provision for character sets whatsoever.)