我正在尝试解析以下SOAP响应，因为它不是一个有效的响应我试图使用以下过滤器删除其命名空间但它会遇到错误。
响应
<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<soap:Body>
<SearchFlightsResponse xmlns="ElsyArres.API">
<SoapMessage>
<Username>TEST</Username>
<Password>TESTs</Password>
<LanguageCode>EN</LanguageCode>
<ErrorMessage />
<ErrorCode>0</ErrorCode>
<AppVersion>8.0.3</AppVersion>
<Request>
<Departure>FDH</Departure>
<Destination>HAM</Destination>
<DepartureDate>2014-08-08</DepartureDate>
<ReturnDate />
<NumADT>1</NumADT>
<NumINF>0</NumINF>
<NumCHD>0</NumCHD>
<CurrencyCode>EUR</CurrencyCode>
<CarrierList />
<FareClasses />
<Providers />
<WaitForResult>true</WaitForResult>
<NearbyDepartures>true</NearbyDepartures>
<NearbyDestinations>true</NearbyDestinations>
<RROnly>false</RROnly>
<MetaSearch>true</MetaSearch>
</Request>
<Response>
<SearchFlightId>140514114543-02-43064-52</SearchFlightId>
<Roundtrip>false</Roundtrip>
<CurrencyCode>EUR</CurrencyCode>
<Flights>
<Flight>
<Outbound>
<CarName>Inter Sky</CarName>
<CarCode>3L</CarCode>
<DepName>Friedrichshafen</DepName>
<DepCode>FDH</DepCode>
<DestName>Hamburg</DestName>
<DestCode>HAM</DestCode>
<Duration>01:45</Duration>
<FlightNo>3L370</FlightNo>
<DepDateTime>2014-08-08T06:10:00</DepDateTime>
<ArrDateTime>2014-08-08T07:55:00</ArrDateTime>
<Legs>
<Leg>
<Sequence>0</Sequence>
<FlightNo>3L370</FlightNo>
<DepCode>FDH</DepCode>
<DepName>Friedrichshafen</DepName>
<DestCode>HAM</DestCode>
<DestName>Hamburg</DestName>
<DepTime>06:10</DepTime>
<ArrTime>07:55</ArrTime>
<CarCode>3L</CarCode>
<CarName>Inter Sky</CarName>
<FareClass>Economy</FareClass>
<ArrDateTime>2014-08-08T07:55:00</ArrDateTime>
<DepDateTime>2014-08-08T06:10:00</DepDateTime>
</Leg>
</Legs>
<Taxes>0</Taxes>
<FareADT>6500</FareADT>
<FareCHD>0</FareCHD>
<FareINF>0</FareINF>
<MiscFees>6400</MiscFees>
<Idx>307963</Idx>
<FareClass>Economy</FareClass>
<FareType>Web</FareType>
<FareId>3L0</FareId>
</Outbound>
<BagFee>0</BagFee>
<CcFee>600</CcFee>
<HandlingFee>500</HandlingFee>
<TotalFare>12900</TotalFare>
<FlightId>140514114543-02-21212-2</FlightId>
<Link2Book>http://sample.com</Link2Book>
<Provider>ElsyArres</Provider>
</Flight>
<Flight>
<Outbound>
<CarName>Inter Sky</CarName>
<CarCode>3L</CarCode>
<DepName>Friedrichshafen</DepName>
<DepCode>FDH</DepCode>
<DestName>Hamburg</DestName>
<DestCode>HAM</DestCode>
<Duration>01:45</Duration>
<FlightNo>3L376</FlightNo>
<DepDateTime>2014-08-08T18:00:00</DepDateTime>
<ArrDateTime>2014-08-08T19:45:00</ArrDateTime>
<Legs>
<Leg>
<Sequence>0</Sequence>
<FlightNo>3L376</FlightNo>
<DepCode>FDH</DepCode>
<DepName>Friedrichshafen</DepName>
<DestCode>HAM</DestCode>
<DestName>Hamburg</DestName>
<DepTime>18:00</DepTime>
<ArrTime>19:45</ArrTime>
<CarCode>3L</CarCode>
<CarName>Inter Sky</CarName>
<FareClass>Economy</FareClass>
<ArrDateTime>2014-08-08T19:45:00</ArrDateTime>
<DepDateTime>2014-08-08T18:00:00</DepDateTime>
</Leg>
</Legs>
<Taxes>0</Taxes>
<FareADT>10500</FareADT>
<FareCHD>0</FareCHD>
<FareINF>0</FareINF>
<MiscFees>6400</MiscFees>
<Idx>307964</Idx>
<FareClass>Economy</FareClass>
<FareType>Web</FareType>
<FareId>3L0</FareId>
</Outbound>
<BagFee>0</BagFee>
<CcFee>600</CcFee>
<HandlingFee>500</HandlingFee>
<TotalFare>16900</TotalFare>
<FlightId>140514114543-02-21212-3</FlightId>
<Link2Book>http://sample.com</Link2Book>
<Provider>ElsyArres</Provider>
</Flight>
</Flights>
</Response>
</SoapMessage>
</SearchFlightsResponse>
</soap:Body>
</soap:Envelope>
代码
message.writeTo(System.out); //show message details
URL endpoint = new URL("http://testv80.elsyarres.net/service.asmx");
SOAPMessage response = connection.call(message, endpoint);
connection.close();
SOAPMessage sm = response;
System.err.println("sm is:" + sm);
System.out.println("Response:");
ByteArrayOutputStream out = new ByteArrayOutputStream();
sm.writeTo(out);
System.out.println(out.toString()); //ValidSoap message
NamespaceFilter outFilter = new NamespaceFilter(null, false);
Reader in = new StringReader(out.toString()); //reading character stream
InputSource is = new InputSource(in);
SAXSource source = new SAXSource(outFilter,is);
第202行＆gt;＆gt;＆gt;
this.results = (SearchFlightsResponse) JAXB.unmarshal(source, SearchFlightsResponse.class);
System.err.println(">" + results.getSoapMessage().getUsername());
JAXBContext context = JAXBContext.newInstance(SearchFlightsResponse.class);
Marshaller m = context.createMarshaller();
m.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
m.marshal(results, System.out);
这是我发现的过滤器实现here
NamespaceFilter
public class NamespaceFilter extends XMLFilterImpl {
private String usedNamespaceUri;
private boolean addNamespace;
//State variable
private boolean addedNamespace = false;
public NamespaceFilter(String namespaceUri,
boolean addNamespace) {
super();
if (addNamespace)
this.usedNamespaceUri = namespaceUri;
else
this.usedNamespaceUri = "";
this.addNamespace = addNamespace;
}
@Override
public void startDocument() throws SAXException {
super.startDocument();
if (addNamespace) {
startControlledPrefixMapping();
}
}
@Override
public void startElement(String arg0, String arg1, String arg2,
Attributes arg3) throws SAXException {
super.startElement(this.usedNamespaceUri, arg1, arg2, arg3);
}
@Override
public void endElement(String arg0, String arg1, String arg2)
throws SAXException {
super.endElement(this.usedNamespaceUri, arg1, arg2);
}
@Override
public void startPrefixMapping(String prefix, String url)
throws SAXException {
if (addNamespace) {
this.startControlledPrefixMapping();
} else {
//Remove the namespace, i.e. don´t call startPrefixMapping for parent!
}
}
private void startControlledPrefixMapping() throws SAXException {
if (this.addNamespace && !this.addedNamespace) {
//We should add namespace since it is set and has not yet been done.
super.startPrefixMapping("", this.usedNamespaceUri);
//Make sure we dont do it twice
this.addedNamespace = true;
}
}
}
错误
java.lang.NullPointerException: No parent for filter
at org.xml.sax.helpers.XMLFilterImpl.setupParse(XMLFilterImpl.java:714)
at org.xml.sax.helpers.XMLFilterImpl.parse(XMLFilterImpl.java:356)
at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal0(UnmarshallerImpl.java:203)
at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal(UnmarshallerImpl.java:181)
at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal(UnmarshallerImpl.java:232)
at javax.xml.bind.JAXB.unmarshal(JAXB.java:259)
at com.test.retrieveFlights(test.java:202)
at com.test.App.main(App.java:17)
答案 0 :(得分：1)
JAXB（JSR-222）实现不应该对SOAP响应有任何问题。这个问题是对你在相关问题上得到答案的回应，但答案是错误的。
SOAPMessage实例是SOAP消息的DOM表示。您只需向下导航到已映射到的子元素并解组它。以下是我们针对您的一个相关问题提出的建议：