使用StAX读取XML字符串
我第一次使用stax解析XML字符串。我找到了一些示例，但无法使我的代码正常工作。这是我的代码的最新版本：
public class AddressResponseParser{
private static final String STATUS = "status";
private static final String ADDRESS_ID = "address_id";
private static final String CIVIC_ADDRESS = "civic_address";
String status = null;
String addressId = null;
String civicAddress = null;
public static AddressResponse parseAddressResponse(String response)
{
try
{
byte[] byteArray = response.getBytes("UTF-8");
ByteArrayInputStream inputStream = new ByteArrayInputStream(byteArray);
XMLInputFactory inputFactory = XMLInputFactory.newInstance();
XMLStreamReader reader = inputFactory.createXMLStreamReader(inputStream);
while (reader.hasNext())
{
int event = reader.next();
if (event == XMLStreamConstants.START_ELEMENT)
{
String element = reader.getLocalName();
if (element.equals(STATUS))
{
status = reader.getElementText();
continue;
}
if (element.equals(ADDRESS_ID))
{
addressId = reader.getText();
continue;
}
if (element.equals(CIVIC_ADDRESS))
{
civicAddress = reader.getText();
continue;
}
}
}
}
catch (Exception e)
{
log.error("Couldn't parse AddressResponse", e);
}
}
}
我将手表放在“事件”和“ reader.getElementText（）”上。当代码停止时
String element = reader.getLocalName();将显示“ reader.getElementText（）”值，但是一旦它偏离该行，就无法评估。当代码停止时：
status = reader.getElementText();“元素”手表显示正确的值。最后，当我又将代码步进一行时，我捕获了此异常：
(com.ctc.wstx.exc.WstxParsingException) com.ctc.wstx.exc.WstxParsingException: Current state not START_ELEMENT at [row,col {unknown-source}]: [1,29]
我尝试使用status = reader.getText();代替，但随后出现此异常：
(java.lang.IllegalStateException) java.lang.IllegalStateException: Not a textual event (END_ELEMENT)有人可以指出我在做什么错吗？
编辑：
添加用于测试的JUnit代码：
public class AddressResponseParserTest{
private String status = "OK";
private String address_id = "123456";
private String civic_address = "727";
@Test
public void testAddressResponseParser() throws UnsupportedEncodingException, XMLStreamException
{
AddressResponse parsedResponse = AddressResponseParser.parseAddressResponse(this.responseXML());
assertEquals(this.status, parsedResponse.getStatus());
assertEquals(this.address_id, parsedResponse.getAddress()
.getAddressId());
assertEquals(this.civic_address, parsedResponse.getAddress()
.getCivicAddress());
}
private String responseXML()
{
StringBuffer buffer = new StringBuffer();
buffer.append("<response>");
buffer.append("<status>OK</status>");
buffer.append("<address>");
buffer.append("<address_id>123456</address_id>");
buffer.append("<civic_address>727</civic_address>");
buffer.append("</address>");
buffer.append("</response>");
return buffer.toString();
}
}
回答：
我找到了一个使用XMLEventReader而不是XMLStreamReader的解决方案：
public MyObject parseXML(String xml) throws XMLStreamException, UnsupportedEncodingException
{
byte[] byteArray = xml.getBytes("UTF-8");
ByteArrayInputStream inputStream = new ByteArrayInputStream(byteArray);
XMLInputFactory inputFactory = XMLInputFactory.newInstance();
XMLEventReader reader = inputFactory.createXMLEventReader(inputStream);
MyObject object = new MyObject();
while (reader.hasNext())
{
XMLEvent event = (XMLEvent) reader.next();
if (event.isStartElement())
{
StartElement element = event.asStartElement();
if (element.getName().getLocalPart().equals("ElementOne"))
{
event = (XMLEvent) reader.next();
if (event.isCharacters())
{
String elementOne = event.asCharacters().getData();
object.setElementOne(elementOne);
}
continue;
}
if (element.getName().getLocalPart().equals("ElementTwo"))
{
event = (XMLEvent) reader.next();
if (event.isCharacters())
{
String elementTwo = event.asCharacters().getData();
object.setElementTwo(elementTwo);
}
continue;
}
}
}
return object;
}
我仍然会对看到使用XMLStreamReader的解决方案感兴趣。
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