Stax问题解析在同一行上有end元素和start元素的文档

时间:2011-12-19 06:09:41

标签: java xml stax

我有以下代码,用于使用Stax将XML文件的元素转换为String:

private static XMLStreamReader getReader(InputStream inputStream) throws XMLStreamException {
    XMLInputFactory xmlInputFactory = XMLInputFactory.newInstance();
    xmlInputFactory.setProperty("javax.xml.stream.isValidating", false);
    xmlInputFactory.setProperty("javax.xml.stream.supportDTD", false);
    XMLStreamReader xmlStreamReader = xmlInputFactory.createXMLStreamReader(inputStream);
    return xmlStreamReader;
}

private static String readElement(XMLStreamReader reader) throws XMLStreamException, TransformerException {
    TransformerFactory tf = TransformerFactory.newInstance();
    Transformer t = tf.newTransformer();
    ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
    StAXSource source = new StAXSource(reader);
    t.transform(source, new StreamResult(outputStream));
    return outputStream.toString();
}

public static void main(String[] args) throws Exception {
    InputStream inputStream = new FileInputStream("c:\\temp\\test.xml");

    XMLStreamReader xmlStreamReader = getReader(inputStream);
    int count = 0;
    while (xmlStreamReader.hasNext()) {
        int eventType = xmlStreamReader.next();
        if (eventType == XMLEvent.START_ELEMENT) {
            String elementName = xmlStreamReader.getName().getLocalPart();
            if (!elementName.toLowerCase().equals("element")) {
                continue;
            }
            String productStr = readElement(xmlStreamReader);
            System.out.println(productStr);
        }
    }
}

}

这适用于以下XML片段:

<testDoc>
  <element>
    <a>hello world</a>
    <b>hello world again</b>
  </element>
  <element>
    <a>foo</a>
    <b>foo bar</b>
  </element>
</testDoc>

但是,此片段存在问题,其中</element><element>位于同一行:

<testDoc>
  <element>
    <a>hello world</a>
    <b>hello world again</b>
  </element><element>
    <a>foo</a>
    <b>foo bar</b>
  </element>
</testDoc>

在第二个例子中,它似乎只处理第一个元素而不是第二个元素。有什么想法吗?

更新

我使用以下代码:

public static void main(String[] args) throws Exception {
    InputStream inputStream = new FileInputStream("c:\\temp\\test.xml");

    XMLStreamReader xmlStreamReader = getReader(inputStream);
    int count = 0;
    while (xmlStreamReader.hasNext()) {
        int eventType = xmlStreamReader.getEventType();
        if (eventType == XMLEvent.START_ELEMENT) {
            String elementName = xmlStreamReader.getName().getLocalPart();
            if (!elementName.toLowerCase().equals("element")) {
                xmlStreamReader.next();
                continue;
            }

            System.out.println(readElement(xmlStreamReader));
        } else {
            xmlStreamReader.next();
        }

    }
}

1 个答案:

答案 0 :(得分:2)

对我来说看起来像个错误。你没有说你正在使用哪个Stax解析器:其中一些非常有绳索。 Woodstox是最可靠的。