解析xml文件时未知的主机异常 [英] unknown host exception while parsing an xml file
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问题描述
当我尝试解析xml时,出现以下异常:-
when i am trying to parse an xml, i am getting following exception :-
java.net.UnknownHostException: hibernate.sourceforge.net
at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at sun.net.NetworkClient.doConnect(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient.<init>(Unknown Source)
at sun.net.www.http.HttpClient.New(Unknown Source)
at sun.net.www.http.HttpClient.New(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.connect(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
at org.apache.xerces.impl.XMLEntityManager.setupCurrentEntity(Unknown Source)
at org.apache.xerces.impl.XMLEntityManager.startEntity(Unknown Source)
at org.apache.xerces.impl.XMLEntityManager.startDTDEntity(Unknown Source)
at org.apache.xerces.impl.XMLDTDScannerImpl.setInputSource(Unknown Source)
at org.apache.xerces.impl.XMLDocumentScannerImpl$DTDDispatcher.dispatch(Unknown Source)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.DOMParser.parse(Unknown Source)
at org.apache.xerces.jaxp.DocumentBuilderImpl.parse(Unknown Source)
at javax.xml.parsers.DocumentBuilder.parse(Unknown Source)
我用来解析xml的代码如下:-
The code that i am using to parse the xml is below:-
File hbmFile = new File(hbmFileName);
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
Document doc = db.parse(hbmFile);
我正在尝试解析为hibernate编写的xml,实际上它是一个hibernate映射文件.
i am trying to parse the xml that has been written for hibernate, actually it is a hibernate mapping file.
我要解析的xml如下:-
The xml that i am trying to parse is below:-
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="org.hibernate.entity.Student" table="table_student">
<id name="rollNo" column="rool_no" type="int"/>
<property name="name" column="st_name" type="string"/>
<set name="marks" table="table_marks">
<key column="roll_no"/>
<composite-element class="org.hibernate.entity.StudentMarks">
<property name="subject" column="st_sub"/>
<property name="marks" column="st_marks"/>
</composite-element>
</set>
</class>
</hibernate-mapping>
请帮助.
推荐答案
我使用了以下代码,对我来说这很好.
i used the following code and this is working fine for me..
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
dbf.setValidating(false);
DocumentBuilder db = dbf.newDocumentBuilder();
db.setEntityResolver(new EntityResolver() {
@Override
public InputSource resolveEntity(String arg0, String arg1)
throws SAXException, IOException {
if(arg0.contains("Hibernate")) {
return new InputSource(new StringReader(""));
} else {
// TODO Auto-generated method stub
return null;
}
}
});
Document doc = db.parse(hbmFile);
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