解析没有根元素的XML流

SequenceInputStream可以解决：

    SAXParserFactory saxFactory = SAXParserFactory.newInstance();    SAXParser parser = saxFactory.newSAXParser();    parser.parse(        new SequenceInputStream( Collections.enumeration(Arrays.asList( new InputStream[] {     new ByteArrayInputStream("<dummy>".getBytes()),     new FileInputStream(file),//bogus xml     new ByteArrayInputStream("</dummy>".getBytes()), }))        ),         new DefaultHandler()    );