public void addSystemMessage(String message) {
		Document docs = textArea.getDocument();

		SimpleAttributeSet attrSet = new SimpleAttributeSet();
		StyleConstants.setForeground(attrSet, Color.BLUE);
		// StyleConstants.setUnderline(attrSet, true);
		// StyleConstants.setItalic(attrSet, true);
		// StyleConstants.setFontSize(attrSet, 24);

		try {
			docs.insertString(docs.getLength(), "\r\n【系统】" + message, attrSet);
		} catch (BadLocationException e) {
			e.printStackTrace();
		}

		textArea.setCaretPosition(docs.getLength());
	}