Re: Cannot close an XML file used for parsing

From: Robert Koberg <rob@k...>
To: Jack Bush <netbeansfan@y...>
Cc: xml-dev@l...
Sent: Tuesday, 28 October, 2008 9:42:21 AM
Subject: Re: Cannot close an XML file used for parsing


close the stream or reader in a finally block to avoid leaving it open 
if an error occurs.

try{
}catch(....){
}finally {
}

On Oct 27, 2008, at 6:03 PM, Jack Bush wrote:

> Hi All,
>
> I appears to have difficulty closing (possibly flushing it first) an 
> XML file that was subsequently being parsed without success. The 
> error generated is:
>
> org.jdom.input.JDOMParseException: Error on line 23: The element 
> type "form" must be terminated by the matching end-tag "</form>".
>
> Below is the code snippets of readData() to retrieve (HTML) data 
> from a website, save it to a file, then convert to XML format before 
> returning the new filename:
> public String readData() {
>
>    try {
>          URL url  = new URL("http://www.abc.com/");
>          URLConnection connection = url.openConnection();
>          InputStream isInHtml = url.openStream();  // throws an 
> IOException
>          disInHtml = new DataInputStream(new 
> BufferedInputStream(isInHtml));
>          System.out.flush();
>          FileOutputStream fosOutHtml = null;
>          fosOutHtml = new FileOutputStream("C:\\Temp\\ABC.html");
>          int oneChar, count=0;
>          while ((oneChar=disInHtml.read()) != -1)
>              fosOutHtml.write(oneChar);
>          isInHtml.close();
>          disInHtml.close();
>          fosOutHtml.flush();    // optional
>          fosOutHtml..close();
>          .....
>    }
>
>    try {
>          File fileInHtml = new File("C:\\Temp\\ABC.html");
>          FileReader frInHtml = new FileReader(fileInHtml);
>          BufferedReader brInHtml = new BufferedReader(frInHtml);
>          String string = "";
>          while (brInHtml.ready())
>              string += brInHtml.readLine() + "\n";
>          fwOutXml  = new FileWriter("C:\\Temp\\ABC.xml");
>          pwOutXml  = new PrintWriter(fwOutXml);
>          light_html2xml html2xml = new light_html2xml();
>          pwOutXml.print(html2xml.Html2Xml(string));
>          system.out.flush()    // optional
>          fwOutXml.flush();      // optional
>          fwOutXml.close();
>          pwOutXml.flush();      // optional
>          pwOutXml.close();
>          return fileInHtml.getAbsolutePath();
>          ....
>    }
> }
>
> // parseData reads the XML file using the name returned by readData()
> public void parseData(String XMLFilename)
> {
>    try
>    {
>        FileReader frInXml = new FileReader(FileName);
>        BufferedReader brInXml = new BufferedReader(frInXml);
>        SAXBuilder saxBuilder = new 
> SAXBuilder("org.apache.xerces.parsers.SAXParser"); // 
> JDOMParseException generated.
>        ....
> }
> These codes would worked when they were in a single method but I 
> have since placed some structure around them using a number methods.
>
> This issue has risen in th past where I have been able to close the 
> XML file prior to reading them again. However, I don't have a 
> solution for it this time round.
>
> I am running JDK 1.6.0_10, Netbeans 6.1, JDOM 1.1 on Windows XP 
> platform.
>
> Any assistance would be appreciated..
>
> Many thanks,
>
> Jack
>
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