线程“main”中的异常java.net.MalformedURLException：未知协议：c
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时间：2020-08-11 02:44:13 来源:igfitidea点击:
Exception in thread "main" java.net.MalformedURLException: unknown protocol: c
提问by James
I am trying to use a SAX Parser to parse a XML file. Although I keep getting the error below in my code:
我正在尝试使用 SAX 解析器来解析 XML 文件。尽管我的代码中不断出现以下错误：
Exception in thread "main" java.net.MalformedURLException: unknown protocol: c
at java.net.URL.<init>(URL.java:592)
at java.net.URL.<init>(URL.java:482)
at java.net.URL.<init>(URL.java:431)
at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.setupCurrentEntity(XMLEntityManager.java:605)
at com.sun.org.apache.xerces.internal.impl.XMLVersionDetector.determineDocVersion(XMLVersionDetector.java:189)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:799)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:764)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:123)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1137)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:580)
at main.main(main.java:28)
Java Result: 1
Here Is My handler Class:
这是我的处理程序类：
public class MySaxParser extends DefaultHandler {
Index i = new Index(12);
String bookxmlfilename;
String tmpValue;
BookCitation c;
JournalArticle j;
Unpublished u;
ConfProceedings p;
public MySaxParser() {
}
@Override
public void startElement(String s, String s1, String elementName, Attributes attr) throws SAXException {
if (elementName.equalsIgnoreCase("JournalArticle")) {
if (elementName.equalsIgnoreCase("Pages")) {
j.setstartPage(Integer.parseInt(attr.getValue("StartPage")));
j.setendPage(Integer.parseInt(attr.getValue("EndPage")));
}
}
if (elementName.equalsIgnoreCase("ConferenceProceedings")) {
if (elementName.equalsIgnoreCase("Pages")) {
p.setstartPage(Integer.parseInt(attr.getValue("StartPage")));
p.setendPage(Integer.parseInt(attr.getValue("EndPage")));
}
}
}
@Override
public void endElement(String s, String s1, String element) throws SAXException {
if (element.equalsIgnoreCase("book")) {
i.addCitation(c);
if (element.equalsIgnoreCase("name")) {
c.setName(tmpValue);
}
if (element.equalsIgnoreCase("publisher")) {
c.setpublisher(tmpValue);
}
if (element.equalsIgnoreCase("publicationDate")) {
c.setdateOfPublication(tmpValue);
}
if (element.equalsIgnoreCase("authors")) {
if (element.equalsIgnoreCase("author")) {
c.addAuthor(tmpValue);
}
}
if (element.equalsIgnoreCase("keywords")) {
if (element.equalsIgnoreCase("keyword")) {
c.addKeyword(tmpValue);
}
}
}
if (element.equalsIgnoreCase("JournalArticle")) {
i.addCitation(j);
if (element.equalsIgnoreCase("name")) {
j.setName(tmpValue);
}
if (element.equalsIgnoreCase("TitleOfJournal")) {
j.settitleOfJournal(tmpValue);
}
if (element.equalsIgnoreCase("TitleOfJournal")) {
j.settitleOfJournal(tmpValue);
}
if (element.equalsIgnoreCase("PublicationDate")) {
j.setpublicationDate(tmpValue);
}
if (element.equalsIgnoreCase("volNumber")) {
j.setvolNumber(Integer.parseInt(tmpValue));
}
if (element.equalsIgnoreCase("IssueNumber")) {
j.setissueNumber(Integer.parseInt(tmpValue));
}
if (element.equalsIgnoreCase("authors")) {
if (element.equalsIgnoreCase("author")) {
j.addAuthor(tmpValue);
}
if (element.equalsIgnoreCase("keywords")) {
if (element.equalsIgnoreCase("keyword")) {
j.addKeyword(tmpValue);
}
}
}
}
if (element.equalsIgnoreCase("Unpublished")) {
i.addCitation(u);
if (element.equalsIgnoreCase("name")) {
u.setName(tmpValue);
}
if (element.equalsIgnoreCase("authors")) {
if (element.equalsIgnoreCase("author")) {
u.addAuthor(tmpValue);
}
if (element.equalsIgnoreCase("keywords")) {
if (element.equalsIgnoreCase("keyword")) {
u.addKeyword(tmpValue);
}
}
}
}
if (element.equalsIgnoreCase("ConferenceProceedings")) {
i.addCitation(p);
if (element.equalsIgnoreCase("name")) {
p.setName(tmpValue);
}
if (element.equalsIgnoreCase("publisher")) {
p.setpublisher(tmpValue);
}
if (element.equalsIgnoreCase("ConferenceLocation")) {
p.setlocationOfConference(tmpValue);
}
if (element.equalsIgnoreCase("TitleOfConferenceproceeding")) {
p.settitleOfConferenceProc(tmpValue);
}
if (element.equalsIgnoreCase("ConferenceYea")) {
p.setconfYear(Integer.parseInt(tmpValue));
}
if (element.equalsIgnoreCase("Editor")) {
p.seteditor(tmpValue);
}
if (element.equalsIgnoreCase("authors")) {
if (element.equalsIgnoreCase("author")) {
p.addAuthor(tmpValue);
}
if (element.equalsIgnoreCase("keywords")) {
if (element.equalsIgnoreCase("keyword")) {
p.addKeyword(tmpValue);
}
}
}
}
if (element.equalsIgnoreCase("FormattingStyle")) {
i.setFormatType("IEEE");
}
if (element.equalsIgnoreCase("FormattingStyle")) {
try {
i.formatIEEE(tmpValue);
} catch (IOException ex) {
Logger.getLogger(MySaxParser.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
@Override
public void characters(char[] ac, int i, int j) throws SAXException {
tmpValue = new String(ac, i, j);
}
}
Here is my main class:
这是我的主要课程：
public class main {
public static void main(String[] args) throws IOException, ParserConfigurationException, SAXException {
// Create scanner
Scanner OswegoNote = new Scanner(System.in);
//Create a parser factory
SAXParserFactory factory = SAXParserFactory.newInstance();
//Make the parser
SAXParser saxParser = factory.newSAXParser();
XMLReader parser = saxParser.getXMLReader();
//Create a handler
MySaxParser handler = new MySaxParser();
//Tell the parser to use this handler
parser.setContentHandler(handler);
//read and parse the document
parser.parse("C:\Users\mhromalik\Documents\Suny Oswego\fall2013\csc241fall2012\Assignment\MyCitation.html");
}
}
And here is part of my XML file:
这是我的 XML 文件的一部分：
<Citation>
<ConferenceProceedings>
<Name>An efficient implementation of Smith Waterman algorithm on GPU using CUDA, for massively parallel scanning of sequence databases</Name>
<Publisher>Parallel and Distributed Processing</Publisher>
<ConferenceLocation>Austin,TX</ConferenceLocation>
<TitleOfConferenceproceeding> IEEE International Conference on Parallel and Distributed Processing</TitleOfConferenceproceeding>
<ConferenceYear>2009</ConferenceYear>
<Editor>S. M. Mann</Editor>
<Pages StartPage="85" EndPage="102"/>
<Authors>
<author>L. L. Ligowski</author>
<author>W. A. Rudnicki</author>
</Authors>
<Keywords>
<Keyword>Sparse Data</Keyword>
<Keyword>DNA</Keyword>
<Keyword>GPU</Keyword>
<Keyword>Data Mining</Keyword>
</Keywords>
</ConferenceProceedings>
</Citation>
<FormattingStyle>IEEE</FormattingStyle>
<FilePath>C:\Users\mhromalik\Documents\Suny Oswego\fall2013\csc241fall2012\Assignment\MyCitation.html</FilePath>
</Index>
I can not figure out why this error is happening. Any help would be greatly appreciated!
我无法弄清楚为什么会发生此错误。任何帮助将不胜感激！
采纳答案by Juned Ahsan
You are missing the protocol when you set the path for your html file. As you are trying to read a local html file, you can use fileprotocol:
为 html 文件设置路径时，您缺少协议。当您尝试读取本地 html 文件时，您可以使用file协议：
file:///{yourfilepath}
回答by Michael Kay
parser.parse() expects a URI, not a filename. You can get from a filename to a URI in Java using
parser.parse() 需要 URI，而不是文件名。您可以使用从文件名到 Java 中的 URI
new File(filename).toURI()
