jdon 论坛的 DataUnformatFilter 类是做什么用的?看不懂 public XMLProperties(String file) { this.file = new File(file); try { SAXBuilder builder = new SAXBuilder(); // Strip formatting DataUnformatFilter format = new DataUnformatFilter(); builder.setXMLFilter(format); doc = builder.build(new File(file)); } catch (Exception e) { System.err.println("Error creating XML parser in " + "PropertyManager.java"); e.printStackTrace(); } } DataUnformatFilter format = new DataUnformatFilter(); builder.setXMLFilter(format);上面两句执行后,总读取不出来xml的正文,只能读取注释。害得我只好注释掉希望得到帮助