使用 Stax 使用 DTD 解析 XML 时出错
Error parsing XML with DTD using Stax
我必须解析包含以下内容的有效 xml 文档：
<?xml version='1.0' encoding="ISO-8859-1" standalone="no" ?>
<!DOCTYPE WMT_MS_Capabilities SYSTEM "http://schemas.opengis.net/wms/1.1.1/WMS_MS_Capabilities.dtd"
[
<!ELEMENT VendorSpecificCapabilities (inspire_vs:ExtendedCapabilities)><!ELEMENT inspire_vs:ExtendedCapabilities ((inspire_common:MetadataUrl, inspire_common:SupportedLanguages, inspire_common:ResponseLanguage) | (inspire_common:ResourceLocator+, inspire_common:ResourceType, inspire_common:TemporalReference+, inspire_common:Conformity+, inspire_common:MetadataPointOfContact+, inspire_common:MetadataDate, inspire_common:SpatialDataServiceType, inspire_common:MandatoryKeyword+, inspire_common:Keyword*, inspire_common:SupportedLanguages, inspire_common:ResponseLanguage, inspire_common:MetadataUrl?))><!ATTLIST inspire_vs:ExtendedCapabilities xmlns:inspire_vs CDATA #FIXED "http://inspire.ec.europa.eu/schemas/inspire_vs/1.0" ><!ELEMENT inspire_common:MetadataUrl (inspire_common:URL, inspire_common:MediaType*)><!ATTLIST inspire_common:MetadataUrl xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" xmlns:xsi CDATA #FIXED "http://www.w3.org/2001/XMLSchema-instance" xsi:type CDATA #FIXED "inspire_common:resourceLocatorType" ><!ELEMENT inspire_common:URL (#PCDATA)><!ATTLIST inspire_common:URL xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0"><!ELEMENT inspire_common:MediaType (#PCDATA)><!ATTLIST inspire_common:MediaType xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0"><!ELEMENT inspire_common:SupportedLanguages (inspire_common:DefaultLanguage, inspire_common:SupportedLanguage*)><!ATTLIST inspire_common:SupportedLanguages xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" ><!ELEMENT inspire_common:DefaultLanguage (inspire_common:Language)><!ATTLIST inspire_common:DefaultLanguage xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" ><!ELEMENT inspire_common:SupportedLanguage (inspire_common:Language)><!ATTLIST inspire_common:SupportedLanguage xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" ><!ELEMENT inspire_common:ResponseLanguage (inspire_common:Language)><!ATTLIST inspire_common:ResponseLanguage xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" ><!ELEMENT inspire_common:Language (#PCDATA)><!ATTLIST inspire_common:Language xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" ><!ELEMENT inspire_common:ResourceLocator (inspire_common:URL, inspire_common:MediaType*)><!ATTLIST inspire_common:ResourceLocator xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0"><!ELEMENT inspire_common:ResourceType (#PCDATA)> <!ATTLIST inspire_common:ResourceType xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" ><!ELEMENT inspire_common:TemporalReference (inspire_common:DateOfCreation?, inspire_common:DateOfLastRevision?, inspire_common:DateOfPublication*, inspire_common:TemporalExtent*)><!ATTLIST inspire_common:TemporalReference xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" ><!ELEMENT inspire_common:DateOfCreation (#PCDATA)> <!ATTLIST inspire_common:DateOfCreation xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0"><!ELEMENT inspire_common:DateOfLastRevision (#PCDATA)><!ATTLIST inspire_common:DateOfLastRevision xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0"><!ELEMENT inspire_common:DateOfPublication (#PCDATA)><!ATTLIST inspire_common:DateOfPublication xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0"><!ELEMENT inspire_common:TemporalExtent (inspire_common:IndividualDate | inspire_common:IntervalOfDates)><!ATTLIST inspire_common:TemporalExtent xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" ><!ELEMENT inspire_common:IndividualDate (#PCDATA)> <!ATTLIST inspire_common:IndividualDate xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0"><!ELEMENT inspire_common:IntervalOfDates (inspire_common:StartingDate, inspire_common:EndDate)><!ATTLIST inspire_common:IntervalOfDates xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" ><!ELEMENT inspire_common:StartingDate (#PCDATA)><!ATTLIST inspire_common:StartingDate xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" ><!ELEMENT inspire_common:EndDate (#PCDATA)><!ATTLIST inspire_common:EndDate xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" ><!ELEMENT inspire_common:Conformity (inspire_common:Specification, inspire_common:Degree)><!ATTLIST inspire_common:Conformity xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" ><!ELEMENT inspire_common:Specification (inspire_common:Title, (inspire_common:DateOfPublication | inspire_common:DateOfCreation | inspire_common:DateOfLastRevision), inspire_common:URI*, inspire_common:ResourceLocator*)><!ATTLIST inspire_common:Specification xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" ><!ELEMENT inspire_common:Title (#PCDATA)><!ATTLIST inspire_common:Title xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" ><!ELEMENT inspire_common:URI (#PCDATA)><!ATTLIST inspire_common:URI xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" ><!ELEMENT inspire_common:Degree (#PCDATA)><!ATTLIST inspire_common:Degree xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" ><!ELEMENT inspire_common:MetadataPointOfContact (inspire_common:OrganisationName, inspire_common:EmailAddress)><!ATTLIST inspire_common:MetadataPointOfContact xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" ><!ELEMENT inspire_common:OrganisationName (#PCDATA)><!ATTLIST inspire_common:OrganisationName xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" ><!ELEMENT inspire_common:EmailAddress (#PCDATA)><!ATTLIST inspire_common:EmailAddress xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" ><!ELEMENT inspire_common:MetadataDate (#PCDATA)><!ATTLIST inspire_common:MetadataDate xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" ><!ELEMENT inspire_common:SpatialDataServiceType (#PCDATA)><!ATTLIST inspire_common:SpatialDataServiceType xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" ><!ELEMENT inspire_common:MandatoryKeyword (inspire_common:KeywordValue)><!ATTLIST inspire_common:MandatoryKeyword xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" ><!ELEMENT inspire_common:KeywordValue (#PCDATA)><!ATTLIST inspire_common:KeywordValue xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" ><!ELEMENT inspire_common:Keyword (inspire_common:OriginatingControlledVocabulary?, inspire_common:KeywordValue)><!ATTLIST inspire_common:Keyword xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" xmlns:xsi CDATA #FIXED "http://www.w3.org/2001/XMLSchemainstance" xsi:type (inspire_common:inspireTheme_bul | inspire_common:inspireTheme_cze | inspire_common:inspireTheme_dan | inspire_common:inspireTheme_dut | inspire_common:inspireTheme_eng | inspire_common:inspireTheme_est | inspire_common:inspireTheme_fin | inspire_common:inspireTheme_fre | inspire_common:inspireTheme_ger | inspire_common:inspireTheme_gre | inspire_common:inspireTheme_hun | inspire_common:inspireTheme_gle | inspire_common:inspireTheme_ita | inspire_common:inspireTheme_lav | inspire_common:inspireTheme_lit | inspire_common:inspireTheme_mlt | inspire_common:inspireTheme_pol | inspire_common:inspireTheme_por | inspire_common:inspireTheme_rum | inspire_common:inspireTheme_slo | inspire_common:inspireTheme_slv | inspire_common:inspireTheme_spa | inspire_common:inspireTheme_swe) #IMPLIED ><!ELEMENT inspire_common:OriginatingControlledVocabulary (inspire_common:Title, (inspire_common:DateOfPublication | inspire_common:DateOfCreation | inspire_common:DateOfLastRevision), inspire_common:URI*, inspire_common:ResourceLocator*)><!ATTLIST inspire_common:OriginatingControlledVocabulary xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0">
]> <!-- end of DOCTYPE declaration -->
<WMT_MS_Capabilities version="1.1.1">
<!-- more elements -->
<VendorSpecificCapabilities>
<inspire_vs:ExtendedCapabilities>
<!-- more elements -->
</inspire_vs:ExtendedCapabilities>
</VendorSpecificCapabilities>
</WMT_MS_Capabilities>
我尝试了这些 StaX 实现：com.sun.xml.internal.stream.XMLInputFactoryImpl 和 com.ctc.wstx.stax.WstxInputFactory (Woodstox)。
在 Stax 处理元素时，两种方式都会出现异常 <inspire_vs:ExtendedCapabilities>:
使用 Woodstox：
com.ctc.wstx.exc.WstxParsingException: Undeclared namespace prefix "inspire_vs" at [row,col {unknown-source}]: [117,35] at com.ctc.wstx.sr.StreamScanner.constructWfcException(StreamScanner.java:618) ~[woodstox-core-5.0.1.jar:5.0.1] at com.ctc.wstx.sr.StreamScanner.throwParseError(StreamScanner.java:491) ~[woodstox-core-5.0.1.jar:5.0.1] at com.ctc.wstx.sr.InputElementStack.resolveAndValidateElement(InputElementStack.java:503) ~[woodstox-core-5.0.1.jar:5.0.1] at com.ctc.wstx.sr.BasicStreamReader.handleStartElem(BasicStreamReader.java:3052) ~[woodstox-core-5.0.1.jar:5.0.1] at com.ctc.wstx.sr.BasicStreamReader.nextFromTree(BasicStreamReader.java:2912) ~[woodstox-core-5.0.1.jar:5.0.1] at com.ctc.wstx.sr.BasicStreamReader.next(BasicStreamReader.java:1115) ~[woodstox-core-5.0.1.jar:5.0.1] at org.codehaus.stax2.ri.Stax2EventReaderImpl.nextEvent(Stax2EventReaderImpl.java:255) ~[stax2-api-3.1.4.jar:?]
使用内部：
javax.xml.stream.XMLStreamException: ParseError at [row,col]:[117,36]
Message: http://www.w3.org/TR/1999/REC-xml-names-19990114#ElementPrefixUnbound?inspire_vs&inspire_vs:ExtendedCapabilities
at com.sun.org.apache.xerces.internal.impl.XMLStreamReaderImpl.next(XMLStreamReaderImpl.java:601) ~[?:1.8.0_31]
at com.sun.xml.internal.stream.XMLEventReaderImpl.nextEvent(XMLEventReaderImpl.java:83) ~[?:1.8.0_31]
我尝试了这些属性的几种组合 (true/false)，但没有任何效果：
javax.xml.stream.isSupportingExternalEntities
javax.xml.stream.supportDTD
javax.xml.stream.isValidating
如何使用 Stax 解析此文档？
您的问题不是文档对于 DTD 无效，而是它不是 namespace-well-formed，因为元素 ExtendedCapabilities 有前缀 inspire_vs，但没有命名空间为此声明（即通过命名空间声明xmlns:inspire_vs="...uri..."）。
作为解决方法，您可以在 Staxreader/XMLStreamReader 中关闭名称空间感知。
当您通过 XMLInputFactory 创建 reader 时，您需要设置：
XMLInputFactory factory = XMLInputFactory.newFactory();
factory.setProperty(XMLInputFactory.IS_NAMESPACE_AWARE, Boolean.FALSE);
XMLStreamReader reader = factory.createXMLStreamReader(...);
我必须解析包含以下内容的有效 xml 文档：
<?xml version='1.0' encoding="ISO-8859-1" standalone="no" ?>
<!DOCTYPE WMT_MS_Capabilities SYSTEM "http://schemas.opengis.net/wms/1.1.1/WMS_MS_Capabilities.dtd"
[
<!ELEMENT VendorSpecificCapabilities (inspire_vs:ExtendedCapabilities)><!ELEMENT inspire_vs:ExtendedCapabilities ((inspire_common:MetadataUrl, inspire_common:SupportedLanguages, inspire_common:ResponseLanguage) | (inspire_common:ResourceLocator+, inspire_common:ResourceType, inspire_common:TemporalReference+, inspire_common:Conformity+, inspire_common:MetadataPointOfContact+, inspire_common:MetadataDate, inspire_common:SpatialDataServiceType, inspire_common:MandatoryKeyword+, inspire_common:Keyword*, inspire_common:SupportedLanguages, inspire_common:ResponseLanguage, inspire_common:MetadataUrl?))><!ATTLIST inspire_vs:ExtendedCapabilities xmlns:inspire_vs CDATA #FIXED "http://inspire.ec.europa.eu/schemas/inspire_vs/1.0" ><!ELEMENT inspire_common:MetadataUrl (inspire_common:URL, inspire_common:MediaType*)><!ATTLIST inspire_common:MetadataUrl xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" xmlns:xsi CDATA #FIXED "http://www.w3.org/2001/XMLSchema-instance" xsi:type CDATA #FIXED "inspire_common:resourceLocatorType" ><!ELEMENT inspire_common:URL (#PCDATA)><!ATTLIST inspire_common:URL xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0"><!ELEMENT inspire_common:MediaType (#PCDATA)><!ATTLIST inspire_common:MediaType xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0"><!ELEMENT inspire_common:SupportedLanguages (inspire_common:DefaultLanguage, inspire_common:SupportedLanguage*)><!ATTLIST inspire_common:SupportedLanguages xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" ><!ELEMENT inspire_common:DefaultLanguage (inspire_common:Language)><!ATTLIST inspire_common:DefaultLanguage xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" ><!ELEMENT inspire_common:SupportedLanguage (inspire_common:Language)><!ATTLIST inspire_common:SupportedLanguage xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" ><!ELEMENT inspire_common:ResponseLanguage (inspire_common:Language)><!ATTLIST inspire_common:ResponseLanguage xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" ><!ELEMENT inspire_common:Language (#PCDATA)><!ATTLIST inspire_common:Language xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" ><!ELEMENT inspire_common:ResourceLocator (inspire_common:URL, inspire_common:MediaType*)><!ATTLIST inspire_common:ResourceLocator xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0"><!ELEMENT inspire_common:ResourceType (#PCDATA)> <!ATTLIST inspire_common:ResourceType xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" ><!ELEMENT inspire_common:TemporalReference (inspire_common:DateOfCreation?, inspire_common:DateOfLastRevision?, inspire_common:DateOfPublication*, inspire_common:TemporalExtent*)><!ATTLIST inspire_common:TemporalReference xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" ><!ELEMENT inspire_common:DateOfCreation (#PCDATA)> <!ATTLIST inspire_common:DateOfCreation xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0"><!ELEMENT inspire_common:DateOfLastRevision (#PCDATA)><!ATTLIST inspire_common:DateOfLastRevision xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0"><!ELEMENT inspire_common:DateOfPublication (#PCDATA)><!ATTLIST inspire_common:DateOfPublication xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0"><!ELEMENT inspire_common:TemporalExtent (inspire_common:IndividualDate | inspire_common:IntervalOfDates)><!ATTLIST inspire_common:TemporalExtent xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" ><!ELEMENT inspire_common:IndividualDate (#PCDATA)> <!ATTLIST inspire_common:IndividualDate xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0"><!ELEMENT inspire_common:IntervalOfDates (inspire_common:StartingDate, inspire_common:EndDate)><!ATTLIST inspire_common:IntervalOfDates xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" ><!ELEMENT inspire_common:StartingDate (#PCDATA)><!ATTLIST inspire_common:StartingDate xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" ><!ELEMENT inspire_common:EndDate (#PCDATA)><!ATTLIST inspire_common:EndDate xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" ><!ELEMENT inspire_common:Conformity (inspire_common:Specification, inspire_common:Degree)><!ATTLIST inspire_common:Conformity xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" ><!ELEMENT inspire_common:Specification (inspire_common:Title, (inspire_common:DateOfPublication | inspire_common:DateOfCreation | inspire_common:DateOfLastRevision), inspire_common:URI*, inspire_common:ResourceLocator*)><!ATTLIST inspire_common:Specification xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" ><!ELEMENT inspire_common:Title (#PCDATA)><!ATTLIST inspire_common:Title xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" ><!ELEMENT inspire_common:URI (#PCDATA)><!ATTLIST inspire_common:URI xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" ><!ELEMENT inspire_common:Degree (#PCDATA)><!ATTLIST inspire_common:Degree xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" ><!ELEMENT inspire_common:MetadataPointOfContact (inspire_common:OrganisationName, inspire_common:EmailAddress)><!ATTLIST inspire_common:MetadataPointOfContact xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" ><!ELEMENT inspire_common:OrganisationName (#PCDATA)><!ATTLIST inspire_common:OrganisationName xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" ><!ELEMENT inspire_common:EmailAddress (#PCDATA)><!ATTLIST inspire_common:EmailAddress xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" ><!ELEMENT inspire_common:MetadataDate (#PCDATA)><!ATTLIST inspire_common:MetadataDate xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" ><!ELEMENT inspire_common:SpatialDataServiceType (#PCDATA)><!ATTLIST inspire_common:SpatialDataServiceType xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" ><!ELEMENT inspire_common:MandatoryKeyword (inspire_common:KeywordValue)><!ATTLIST inspire_common:MandatoryKeyword xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" ><!ELEMENT inspire_common:KeywordValue (#PCDATA)><!ATTLIST inspire_common:KeywordValue xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" ><!ELEMENT inspire_common:Keyword (inspire_common:OriginatingControlledVocabulary?, inspire_common:KeywordValue)><!ATTLIST inspire_common:Keyword xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0" xmlns:xsi CDATA #FIXED "http://www.w3.org/2001/XMLSchemainstance" xsi:type (inspire_common:inspireTheme_bul | inspire_common:inspireTheme_cze | inspire_common:inspireTheme_dan | inspire_common:inspireTheme_dut | inspire_common:inspireTheme_eng | inspire_common:inspireTheme_est | inspire_common:inspireTheme_fin | inspire_common:inspireTheme_fre | inspire_common:inspireTheme_ger | inspire_common:inspireTheme_gre | inspire_common:inspireTheme_hun | inspire_common:inspireTheme_gle | inspire_common:inspireTheme_ita | inspire_common:inspireTheme_lav | inspire_common:inspireTheme_lit | inspire_common:inspireTheme_mlt | inspire_common:inspireTheme_pol | inspire_common:inspireTheme_por | inspire_common:inspireTheme_rum | inspire_common:inspireTheme_slo | inspire_common:inspireTheme_slv | inspire_common:inspireTheme_spa | inspire_common:inspireTheme_swe) #IMPLIED ><!ELEMENT inspire_common:OriginatingControlledVocabulary (inspire_common:Title, (inspire_common:DateOfPublication | inspire_common:DateOfCreation | inspire_common:DateOfLastRevision), inspire_common:URI*, inspire_common:ResourceLocator*)><!ATTLIST inspire_common:OriginatingControlledVocabulary xmlns:inspire_common CDATA #FIXED "http://inspire.ec.europa.eu/schemas/common/1.0">
]> <!-- end of DOCTYPE declaration -->
<WMT_MS_Capabilities version="1.1.1">
<!-- more elements -->
<VendorSpecificCapabilities>
<inspire_vs:ExtendedCapabilities>
<!-- more elements -->
</inspire_vs:ExtendedCapabilities>
</VendorSpecificCapabilities>
</WMT_MS_Capabilities>
我尝试了这些 StaX 实现：com.sun.xml.internal.stream.XMLInputFactoryImpl 和 com.ctc.wstx.stax.WstxInputFactory (Woodstox)。
在 Stax 处理元素时，两种方式都会出现异常 <inspire_vs:ExtendedCapabilities>:
使用 Woodstox：
com.ctc.wstx.exc.WstxParsingException: Undeclared namespace prefix "inspire_vs" at [row,col {unknown-source}]: [117,35] at com.ctc.wstx.sr.StreamScanner.constructWfcException(StreamScanner.java:618) ~[woodstox-core-5.0.1.jar:5.0.1] at com.ctc.wstx.sr.StreamScanner.throwParseError(StreamScanner.java:491) ~[woodstox-core-5.0.1.jar:5.0.1] at com.ctc.wstx.sr.InputElementStack.resolveAndValidateElement(InputElementStack.java:503) ~[woodstox-core-5.0.1.jar:5.0.1] at com.ctc.wstx.sr.BasicStreamReader.handleStartElem(BasicStreamReader.java:3052) ~[woodstox-core-5.0.1.jar:5.0.1] at com.ctc.wstx.sr.BasicStreamReader.nextFromTree(BasicStreamReader.java:2912) ~[woodstox-core-5.0.1.jar:5.0.1] at com.ctc.wstx.sr.BasicStreamReader.next(BasicStreamReader.java:1115) ~[woodstox-core-5.0.1.jar:5.0.1] at org.codehaus.stax2.ri.Stax2EventReaderImpl.nextEvent(Stax2EventReaderImpl.java:255) ~[stax2-api-3.1.4.jar:?]
使用内部：
javax.xml.stream.XMLStreamException: ParseError at [row,col]:[117,36]
Message: http://www.w3.org/TR/1999/REC-xml-names-19990114#ElementPrefixUnbound?inspire_vs&inspire_vs:ExtendedCapabilities
at com.sun.org.apache.xerces.internal.impl.XMLStreamReaderImpl.next(XMLStreamReaderImpl.java:601) ~[?:1.8.0_31]
at com.sun.xml.internal.stream.XMLEventReaderImpl.nextEvent(XMLEventReaderImpl.java:83) ~[?:1.8.0_31]
我尝试了这些属性的几种组合 (true/false)，但没有任何效果：
javax.xml.stream.isSupportingExternalEntities
javax.xml.stream.supportDTD
javax.xml.stream.isValidating
如何使用 Stax 解析此文档？
您的问题不是文档对于 DTD 无效，而是它不是 namespace-well-formed，因为元素 ExtendedCapabilities 有前缀 inspire_vs，但没有命名空间为此声明（即通过命名空间声明xmlns:inspire_vs="...uri..."）。
作为解决方法，您可以在 Staxreader/XMLStreamReader 中关闭名称空间感知。
当您通过 XMLInputFactory 创建 reader 时，您需要设置：
XMLInputFactory factory = XMLInputFactory.newFactory();
factory.setProperty(XMLInputFactory.IS_NAMESPACE_AWARE, Boolean.FALSE);
XMLStreamReader reader = factory.createXMLStreamReader(...);