用sax跳过节点

您可以执行以下操作：

import javax.xml.parsers.SAXParser;import javax.xml.parsers.SAXParserFactory;import org.xml.sax.XMLReader;public class Demo {    public static void main(String[] args) throws Exception {        SAXParserFactory spf = SAXParserFactory.newInstance();        SAXParser sp = spf.newSAXParser();        XMLReader xr = sp.getXMLReader();        xr.setContentHandler(new MyContentHandler(xr));        xr.parse("input.xml");    }}

MyContentHandler

此类负责处理您的XML文档。击中要忽略的节点时，可以在IgnoringContentHandler中进行交换，这将吞噬该节点的所有事件。

import org.xml.sax.Attributes;import org.xml.sax.SAXException;import org.xml.sax.XMLReader;import org.xml.sax.helpers.DefaultHandler;public class MyContentHandler extends DefaultHandler {    private XMLReader xmlReader;    public MyContentHandler(XMLReader xmlReader) {        this.xmlReader = xmlReader;    }    public void startElement(String uri, String localName, String qName, Attributes atts) throws SAXException {        if ("sodium".equals(qName)) { xmlReader.setContentHandler(new IgnoringContentHandler(xmlReader,         this));        } else { System.out.println("START " + qName);        }    }    public void endElement(String uri, String localName, String qName) throws SAXException {        System.out.println("END " + qName);    }    public void characters(char[] ch, int start, int length) throws SAXException {        System.out.println(new String(ch, start, length));    }}

忽略ContentHandler

当IgnoringContentHandler完成吞咽事件后，它将控制权传递回您的主ContentHandler。

import org.xml.sax.Attributes;import org.xml.sax.ContentHandler;import org.xml.sax.SAXException;import org.xml.sax.XMLReader;import org.xml.sax.helpers.DefaultHandler;public class IgnoringContentHandler extends DefaultHandler {    private int depth = 1;    private XMLReader xmlReader;    private ContentHandler contentHandler;    public IgnoringContentHandler(XMLReader xmlReader, ContentHandler contentHandler) {        this.contentHandler = contentHandler;        this.xmlReader = xmlReader;    }    public void startElement(String uri, String localName, String qName, Attributes atts) throws SAXException {        depth++;    }    public void endElement(String uri, String localName, String qName) throws SAXException {        depth--;        if(0 == depth) {xmlReader.setContentHandler(contentHandler);        }    }}