问题
I am trying to parse the following SOAP response, as it is not a valid response I am trying to remove its namespace using the following filter but it runs into an error.
Response
<?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>
Code
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);
Line 202 >>>
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);
This is the filter implementation that I've found 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;
}
}
}
Error
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)
回答1:
A JAXB (JSR-222) implementation should not have any problems with that SOAP response as is. This question was in response to an answer you got on a related question, but that answer was incorrect.
- JAXB unmarshalling returns 'URI is not absolute' error
The SOAPMessage instance is a DOM representation of the SOAP message. You simply need to navigate down to the child element you have mapped to and unmarshal that. Below is what we came up with for one of your related questions:
- Can not unmarshall the SOAP response
来源：https://stackoverflow.com/questions/24228672/cannot-remove-namespace-of-soap-response-using-saxfilter