JTextPane仅在第一行正确设置字符属性

Question

        private void changeColor(StyledDocument styledDocument)
        {
            String keywords[] = {"html", "body", "div", "teste"};
            String texto      = edtEditing.getText();

            int startIndex;
            int start;

            StyleContext context = StyleContext.getDefaultStyleContext();

            Style styleDefault = context.getStyle(StyleContext.DEFAULT_STYLE); // default
            styledDocument.setCharacterAttributes(0, texto.length(), styleDefault, true);

            AttributeSet attr = context.addAttribute(context.getEmptySet(), StyleConstants.Foreground, Color.red);

            for (String word:keywords)
            {
                startIndex = 0;
                start      = texto.indexOf(word, startIndex);
                while (start >= 0)
                {
                    styledDocument.setCharacterAttributes(start, word.length(), attr, true);
                    startIndex += word.length();
                    start = texto.indexOf(word, startIndex);
                }
            }
        }

Answer 1

这种副作用是由这一行引起的：

String texto      = edtEditing.getText();

您将直接从JTextPane获取文本，但要在StyledDocument对象上设置属性。将此行更改为：

StyledDocument document = edtEditing.getStyledDocument();
String texto = document.getText(0, document.getLength());

并处理可能的异常。

JTextPane pane = new JTextPane();
pane.setText("Something html\r\nSomething html");
StyledDocument document = pane.getStyledDocument();
String text2 = pane.getText();
String text1 = document.getText(0, document.getLength());
System.out.println(text1.equals(text2));