👀 Views: 29 💬 Answers: 1 📅 Created: 2025-08-22

xml java sax Java

I've spent hours debugging this and I've tried everything I can think of but I'm stuck trying to I tried several approaches but none seem to work. I'm currently facing an issue while parsing a large XML file (around 200 MB) using the SAXParser in Java. The XML file is structured with nested elements, and I expect the parsing to be efficient without running into memory issues. When I run the parser, I receive an error that states `java.lang.OutOfMemoryError: Java heap space`. I've already tried increasing the JVM heap size with `-Xmx2g`, but it still crashes halfway through the parsing process. Here’s a simplified version of my SAX handler: ```java import org.xml.sax.Attributes; import org.xml.sax.SAXException; import org.xml.sax.helpers.DefaultHandler; public class MyHandler extends DefaultHandler { @Override public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException { // Process start of element } @Override public void characters(char[] ch, int start, int length) throws SAXException { // Handle the character data } @Override public void endElement(String uri, String localName, String qName) throws SAXException { // Process end of element } } ``` And here’s how I’m initiating the parser: ```java import javax.xml.parsers.SAXParser; import javax.xml.parsers.SAXParserFactory; public class Main { public static void main(String[] args) { try { SAXParserFactory factory = SAXParserFactory.newInstance(); SAXParser saxParser = factory.newSAXParser(); MyHandler handler = new MyHandler(); saxParser.parse("path/to/largefile.xml", handler); } catch (Exception e) { e.printStackTrace(); } } } ``` I suspect that my handler might be holding onto too much data at once, but I'm unsure how to optimize it for such large files. I've already ensured that I’m not accidentally retaining references to any large objects within the handler. Are there any best practices or design patterns I should consider when working with large XML files in Java? Any help would be greatly appreciated! This is part of a larger application I'm building. What am I doing wrong? How would you solve this? Any pointers in the right direction? I'm on CentOS using the latest version of Java. I'd really appreciate any guidance on this.