How do I close an opened XML-file I just read?

[Robert Jaeger]

Hi!
I am using the following code to open XML files:

SAXBuilder builder = new SAXBuilder ("org.apache.xerces.parsers.SAXParser");
Document doc = builder.build(new File("test.xml"));

Now, after surfing on the webpages for a while(generated with jsp, content source is XML) Tomcat reported that too many documents are opened. I had to restart Tomcat.
So do I have to explicitly close the xml-files? How?
Thanks for your help,
Robert.

[Roseanne Zhang]

Don't be lazy, construct a FileReader first, after build, close it. This will solve too many files open problem. This is extremely important to busy websites. The resources will be used really quickly. You don't DOS (deny of services) by your own mistake. You original code will never close the valuable resources.

        try {
            SAXBuilder builder =
                new SAXBuilder("org.apache.xerces.parsers.SAXParser");
            docarray = new Document[60];
            FileReader[] farray = new FileReader[60];
            for (int i = 0; i < 60; i++) {
                farray[i] = new FileReader(new File("test" + i + ".xml"));
                docarray[i] = builder.build(farray[i]);
                // even all Filereader is closed, the doc is still available
                farray[i].close();
            }
        } catch (JDOMException jde) {
            jde.printStackTrace();
        } catch (IOException ioe) {
            ioe.printStackTrace();
        }
        // all XML doc are available, random choose one
        //for (int i=59; i>=0; i--) {
        traveseDoc(34);
        //}   

All 60 files are closed after build, but all Documents are still available for traversal.
See complete tested code here:
http://bobcat.webappcabaret.net/javachina/faq/xml_java_01.htm#jaxp_jdom_Q30
[ April 12, 2003: Message edited by: Roseanne Zhang ]