java解析xml字符串

你可以使用Java内置的DOM或者SAX解析器来解析XML字符串。

使用DOM解析器：

import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.DocumentBuilder;
import org.w3c.dom.Document;
import org.w3c.dom.NodeList;
import org.w3c.dom.Node;
import org.w3c.dom.Element;

String xmlString = "your xml string";
DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
Document doc = dBuilder.parse(new InputSource(new StringReader(xmlString)));
doc.getDocumentElement().normalize();
NodeList nList = doc.getElementsByTagName("your tag name");

for (int temp = 0; temp < nList.getLength(); temp++) {
    Node nNode = nList.item(temp);
    if (nNode.getNodeType() == Node.ELEMENT_NODE) {
        Element eElement = (Element) nNode;
        String value = eElement.getElementsByTagName("your sub tag name").item(0).getTextContent();
    }
}

使用SAX解析器：

import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

String xmlString = "your xml string";
SAXParserFactory factory = SAXParserFactory.newInstance();
SAXParser saxParser = factory.newSAXParser();
DefaultHandler handler = new DefaultHandler() {
    boolean bTag = false;
    boolean bSubTag = false;

    public void startElement(String uri, String localName,String qName,
            Attributes attributes) throws SAXException {
        if (qName.equalsIgnoreCase("your tag name")) {
            bTag = true;
        } else if (qName.equalsIgnoreCase("your sub tag name")) {
            bSubTag = true;
        }
    }

    public void endElement(String uri, String localName,
            String qName) throws SAXException {
        if (qName.equalsIgnoreCase("your tag name")) {
            bTag = false;
        } else if (qName.equalsIgnoreCase("your sub tag name")) {
            bSubTag = false;
        }
    }

    public void characters(char ch[], int start, int length) throws SAXException {
        if (bSubTag) {
            String value = new String(ch, start, length);
        }
    }
};
saxParser.parse(new InputSource(new StringReader(xmlString)), handler);