add HTML DTD on top line to default.jspx, it cause error.for what?
everybody know every html page have HTML DTD,
like below:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
ever this page have html dtd like:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
but i add that to my WEB-INF/layout/default.jspx first line,it cause:
严重: Servlet.service() for servlet jsp threw exception
java.io.IOException: Server returned HTTP response code: 503 for URL: http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd
at sun.net.http://www.protocol.http.HttpURLConn...tion.java:1313)
at com.sun.org.apache.xerces.internal.impl.XMLEntityM anager.setupCurrentEntity(XMLEntityManager.java:67 7)
at com.sun.org.apache.xerces.internal.impl.XMLEntityM anager.startEntity(XMLEntityManager.java:1315)
at com.sun.org.apache.xerces.internal.impl.XMLEntityM anager.startDTDEntity(XMLEntityManager.java:1282)
at com.sun.org.apache.xerces.internal.impl.XMLDTDScan nerImpl.setInputSource(XMLDTDScannerImpl.java:283)
at com.sun.org.apache.xerces.internal.impl.XMLDocumen tScannerImpl$DTDDriver.dispatch(XMLDocumentScanner Impl.java:1194)
at com.sun.org.apache.xerces.internal.impl.XMLDocumen tScannerImpl$DTDDriver.next(XMLDocumentScannerImpl .java:1090)
at com.sun.org.apache.xerces.internal.impl.XMLDocumen tScannerImpl$PrologDriver.next(XMLDocumentScannerI mpl.java:1003)
at com.sun.org.apache.xerces.internal.impl.XMLDocumen tScannerImpl.next(XMLDocumentScannerImpl.java:648)
at com.sun.org.apache.xerces.internal.impl.XMLNSDocum entScannerImpl.next(XMLNSDocumentScannerImpl.java: 140)
at com.sun.org.apache.xerces.internal.impl.XMLDocumen tFragmentScannerImpl.scanDocument(XMLDocumentFragm entScannerImpl.java:511)
at com.sun.org.apache.xerces.internal.parsers.XML11Co nfiguration.parse(XML11Configuration.java:808)
at com.sun.org.apache.xerces.internal.parsers.XML11Co nfiguration.parse(XML11Configuration.java:737)
at com.sun.org.apache.xerces.internal.parsers.XMLPars er.parse(XMLParser.java:119)
at com.sun.org.apache.xerces.internal.parsers.Abstrac tSAXParser.parse(AbstractSAXParser.java:1205)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserI mpl$JAXPSAXParser.parse(SAXParserImpl.java:522)
at javax.xml.parsers.SAXParser.parse(SAXParser.java:3 95)
why?
