SAX解析器。如何阻止SAX解析器连接到Internet?
我想解析11384 XML文件到一个SQLite数据库。其中之一:SAX解析器。如何阻止SAX解析器连接到Internet?
<?xml version="1.0" encoding="UTF-8"?>
<!--
Copyright (C) 2009/2010/2011 Ulrich Apel.
This work is distributed under the conditions of the Creative Commons
Attribution-Share Alike 3.0 Licence. This means you are free:
* to Share - to copy, distribute and transmit the work
* to Remix - to adapt the work
Under the following conditions:
* Attribution. You must attribute the work by stating your use of KanjiVG in
your own copyright header and linking to KanjiVG's website
(http://kanjivg.tagaini.net)
* Share Alike. If you alter, transform, or build upon this work, you may
distribute the resulting work only under the same or similar license to this
one.
See http://creativecommons.org/licenses/by-sa/3.0/ for more details.
-->
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.0//EN" "http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd" [
<!ATTLIST g
xmlns:kvg CDATA #FIXED "http://kanjivg.tagaini.net"
kvg:element CDATA #IMPLIED
kvg:variant CDATA #IMPLIED
kvg:partial CDATA #IMPLIED
kvg:original CDATA #IMPLIED
kvg:part CDATA #IMPLIED
kvg:number CDATA #IMPLIED
kvg:tradForm CDATA #IMPLIED
kvg:radicalForm CDATA #IMPLIED
kvg:position CDATA #IMPLIED
kvg:radical CDATA #IMPLIED
kvg:phon CDATA #IMPLIED >
<!ATTLIST path
xmlns:kvg CDATA #FIXED "http://kanjivg.tagaini.net"
kvg:type CDATA #IMPLIED >
]>
<svg xmlns="http://www.w3.org/2000/svg" width="109" height="109" viewBox="0 0 109 109">
<g id="kvg:StrokePaths_0ff01" style="fill:none;stroke:#000000;stroke-width:3;stroke-linecap:round;stroke-linejoin:round;">
<g id="kvg:0ff01">
<path id="kvg:0ff01-s1" d="M54.5,15.79c0,6.07-0.29,55.49-0.29,60.55"/>
<path id="kvg:0ff01-s2" d="M54.5,88 c -0.83,0 -1.5,0.67 -1.5,1.5 0,0.83 0.67,1.5 1.5,1.5 0.83,0 1.5,-0.67 1.5,-1.5 0,-0.83 -0.67,-1.5 -1.5,-1.5"/>
</g>
</g>
<g id="kvg:StrokeNumbers_0ff01" style="font-size:8;fill:#808080">
<text transform="matrix(1 0 0 1 45 16)">1</text>
<text transform="matrix(1 0 0 1 45 88)">2</text>
</g>
</svg>
我使用SAX解析器:
public class SaxKanjivgHandler extends DefaultHandler {
.....
File folder = new File(KANJIVG_DIRECTORY);
if (folder.isDirectory()) {
File[] listOfFiles = folder.listFiles();
for (File file : listOfFiles) {
if (file.isFile()) {
currentFileName = file.getName();
readXmlFromFile(file);
}
}
}
.....
public void readXmlFromFile(File file) throws ParserConfigurationException,
SAXException, IOException {
SAXParserFactory factory = SAXParserFactory.newInstance();
SAXParser parser = factory.newSAXParser();
parser.parse(file, this);
}
当我解析的文件,我收到此错误:
Exception in thread "main" java.net.SocketException: Connection reset at java.net.SocketInputStream.read(Unknown Source) at java.net.SocketInputStream.read(Unknown Source) at java.io.BufferedInputStream.fill(Unknown Source) at java.io.BufferedInputStream.read1(Unknown Source) at java.io.BufferedInputStream.read(Unknown Source) at sun.net.www.MeteredStream.read(Unknown Source) at java.io.FilterInputStream.read(Unknown Source) at sun.net.www.protocol.http.HttpURLConnection$HttpInputStream.read(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLEntityManager$RewindableInputStream.read(Unknown Source) at com.sun.org.apache.xerces.internal.impl.io.UTF8Reader.read(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLEntityScanner.load(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLEntityScanner.skipSpaces(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLDTDScannerImpl.scanEntityDecl(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLDTDScannerImpl.scanDecls(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLDTDScannerImpl.scanDTDExternalSubset(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$DTDDriver.dispatch(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$DTDDriver.next(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source) at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source) at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source) at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source) at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source) at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source) at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl.parse(Unknown Source) at javax.xml.parsers.SAXParser.parse(Unknown Source) at SaxKanjivgHandler.readXmlFromFile(SaxKanjivgHandler.java:63) at SaxKanjivgHandler.(SaxKanjivgHandler.java:44) at Main.main(Main.java:28)
首先,我认为这错误是由于一个确切的文件。但是不同时间的不同文件会发生错误。如何使SAX解析器停止连接到Internet?
您可以提供自己的EntityResolver
public class DummyEntityResolver implements EntityResolver {
public InputSource resolveEntity(String publicID, String systemID)
throws SAXException {
return new InputSource(new StringReader(""));
}
}
和
public void readXmlFromFile(File file) throws ParserConfigurationException,
SAXException, IOException {
SAXParserFactory factory = SAXParserFactory.newInstance();
SAXParser parser = factory.newSAXParser();
parser.getXMLReader().setEntityResolver(new DummyEntityResolver());
parser.parse(file, this);
}
这将阻止外部实体解析。如果你有一些外部实体,你想提供,你可以检查publicID
和systemID
。
HTH。
另外你可能会注意到,Saxon有一个EntityResolver,net.sf.saxon.lib.StandardEntityResolver,它知道最常见的W3C DTD和外部实体文件,并将它们重定向到本地副本保存在Saxon JAR文件中。 – 2015-02-11 22:01:34
Thx为提示。没有意识到这一点。 – mp911de 2015-02-12 07:06:46
以上解决方案不适用于解析器。使用XMLReader .... XMLReader reader = XMLReaderFactory.createXMLReader(); reader.setEntityResolver(new DtdResolver()); – user001 2015-09-01 09:55:53
我只是猜测,但它可能是你没有[关闭DTD验证](https://*.com/questions/1185519/how-to-read-well-formed-xml-in- java-but-skip-the-schema) – hd1 2015-02-11 17:46:08