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POCode for Using StAX in java
 

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    <p>I have an 200 MB xml of the following form:</p> <pre><code> &lt;school name = "some school"&gt; &lt;class standard = "2A"&gt; &lt;student&gt; ..... &lt;/student&gt; &lt;student&gt; ..... &lt;/student&gt; &lt;student&gt; ..... &lt;/student&gt; &lt;/class&gt; &lt;/school&gt; </code></pre> <p>I need to <strong>split this xml into several files</strong> using StAX such <strong>that n students come under each xml file</strong> and the structure is preserved as <code>&lt;school&gt;</code> then <code>&lt;class&gt;</code> and <code>&lt;students&gt;</code> under them. The attributes of School and class also must be preserved in the resultant xmls.</p> <p>Here is the code I am using:</p> <pre><code>XMLInputFactory inputFactory = XMLInputFactory.newInstance(); String xmlFile = "input.XML"; XMLEventReader reader = inputFactory.createXMLEventReader(new FileReader(xmlFile)); XMLOutputFactory outputFactory = XMLOutputFactory.newInstance(); outputFactory.setProperty("javax.xml.stream.isRepairingNamespaces", Boolean.TRUE); XMLEventWriter writer = null; int count = 0; QName name = new QName(null, "student"); try { while (true) { XMLEvent event = reader.nextEvent(); if (event.isStartElement()) { StartElement element = event.asStartElement(); if (element.getName().equals(name)) { String filename = "input"+ count + ".xml"; writer = outputFactory.createXMLEventWriter(new FileWriter(filename)); writeToFile(reader, event, writer); writer.close(); count++; } } if (event.isEndDocument()) break; } } catch (XMLStreamException e) { throw e; } catch (IOException e) { e.printStackTrace(); } finally { reader.close(); } private static void writeToFile(XMLEventReader reader, XMLEvent startEvent, XMLEventWriter writer) throws XMLStreamException, IOException { StartElement element = startEvent.asStartElement(); QName name = element.getName(); int stack = 1; writer.add(element); while (true) { XMLEvent event = reader.nextEvent(); if (event.isStartElement() &amp;&amp; event.asStartElement().getName().equals(name)) stack++; if (event.isEndElement()) { EndElement end = event.asEndElement(); if (end.getName().equals(name)) { stack--; if (stack == 0) { writer.add(event); break; } } } writer.add(event); } } </code></pre> <p>Please check the function call <code>writeToFile(reader, event, writer)</code> in the try block. Here the reader object has only the <code>student</code> tag. I need the reader has the <code>school</code>, <code>class</code>, and then n <code>students</code> in it. so that the file generated has a similar structure as the original only with lesser children per file.</p> <p>Thanks in advance.</p>
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    1. COThis is not a code-generation service. Try it yourself (using the samples you found) and post a **concrete** question when you run into a problem.
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      1. USJoachim Sauer
    2. COthen **post** what you attempted and **explain** where you are stuck. I **do** want to help, but I don't want to be a code-generation service (and I don't want this site to become one).
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    3. COPlease refrain from reprimanding users with about 260 times your reputation.
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      1. USmusiKk
 

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