我的文件中有dtd,但我无法删除它。当我尝试在Java中解析它时,我会收到“Caused by: java.net.SocketException: Network is unreachable: connect”错误,因为它是远程dtd。我能否以某种方式禁用dtd检查?
您应该能够指定自己的EntityResolver,或使用解析器的特定功能。参见这里,了解一些方法。
一个更完整的例子:
<?xml version="1.0"?>
<!DOCTYPE foo PUBLIC "//FOO//" "foo.dtd">
<foo>
<bar>Value</bar>
</foo>
还有XPath的使用:
import java.io.File;
import java.io.IOException;
import java.io.StringReader;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathFactory;
import org.w3c.dom.Document;
import org.xml.sax.EntityResolver;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
public class Main {
public static void main(String[] args) throws Exception {
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
builder.setEntityResolver(new EntityResolver() {
@Override
public InputSource resolveEntity(String publicId, String systemId)
throws SAXException, IOException {
System.out.println("Ignoring " + publicId + ", " + systemId);
return new InputSource(new StringReader(""));
}
});
Document document = builder.parse(new File("src/foo.xml"));
XPathFactory xpathFactory = XPathFactory.newInstance();
XPath xpath = xpathFactory.newXPath();
String content = xpath.evaluate("/foo/bar/text()", document
.getDocumentElement());
System.out.println(content);
}
}
希望这有所帮助…这对我有效:
SAXParserFactory saxfac = SAXParserFactory.newInstance();
saxfac.setValidating(false);
try {
saxfac.setFeature("http://xml.org/sax/features/validation", false);
saxfac.setFeature("http://apache.org/xml/features/nonvalidating/load-dtd-grammar", false);
saxfac.setFeature("http://apache.org/xml/features/nonvalidating/load-external-dtd", false);
saxfac.setFeature("http://xml.org/sax/features/external-general-entities", false);
saxfac.setFeature("http://xml.org/sax/features/external-parameter-entities", false);
}
catch (Exception e1) {
e1.printStackTrace();
}
saxfac.setFeature("http://apache.org/xml/features/nonvalidating/load-external-dtd", false);
- Denys Kniazhev-Support Ukraine我曾经遇到过这个问题,解决方法是下载并存储DTD的本地副本,然后根据本地副本进行验证。您需要编辑XML文件以指向本地副本。
<!DOCTYPE root-element SYSTEM "filename">
这里有更多信息:http://www.w3schools.com/dtd/dtd_intro.asp
我认为你也可以在解析XML时手动将某种验证属性设置为“false”。这取决于你用来解析XML的库。