Java JTextPane HTML编辑器UTF-8字符编码

问题描述：

我正在使用JTextPane作为简单的html编辑器。

I'm using JTextPane as simple html editor.

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

当我调用jtp.getText（）时，我获得了很好的html代码，所有特殊字符都被转义。但是我不希望逃脱国家角色（波兰语），但只有特殊的html字符如&，<，>
当我进入编辑器时

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 &

我得到

&lt;foo&gt;&#261; &#347; &amp;

但我希望得到

&lt;foo&gt;ą ś &amp;

它是如何实现的？

答

不幸的是，这是不可能的。

That's not possible, unfortunately.

javax.swing.text.html.HTMLWriter - 将任何非ASCII符号转换为数字表示是硬编码的：

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;
}

无法以任何方式控制此逻辑。

This logic cannot be controlled in any way.

但如果你真的非常需要这种功能，你可以做疯狂的事情：

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

复制并粘贴 HTMLWriter 来源于 HTMLWriterHack （在同一个包中 javax.swing.text.html 并重命名里面的所有字符串）

替换上面列出的三个输出类似输出的行（String.valueOf（chars [counter]））;

复制并粘贴 HTMLDocument 来源 HTMLDocumentHack （在同一个包中 javax.swing.text.html ，renami内部所有字符串，使其扩展 HTMLDocument 并删除冲突方法）

使用下面列出的CustomEditorKit而不是HTMLEditorKit

copy and paste HTMLWriter sources into HTMLWriterHack (in the same package javax.swing.text.html and renaming all strings inside)
Replace the above listed three output lines with something like output(String.valueOf(chars[counter]));
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 *ing methods)
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;
    }
}

虽然上面的步骤（我测试过），但我当然不建议这样做。

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

Java JTextPane HTML编辑器UTF-8字符编码

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