学步园

1.读取XML文件的类：

public class XMLUtils {</p> <p> private final String DB_XML_FILE = "/XMLSetting.xml";</p> <p> public Properties getPropertiesFromXML() {<br /> URL url = XMLUtils.class.getResource(dBXMLFILE);<br /> URI uri;<br /> try {<br /> uri = url.toURI();<br /> InputSource xmlfile = new InputSource(uri.getPath());<br /> MyDefaultHandler handler = new MyDefaultHandler ();<br /> SAXParserFactory parserFactory = SAXParserFactory.newInstance();<br /> SAXParser parser = parserFactory.newSAXParser();<br /> parser.parse(xmlfile, handler);<br /> return handler.getProps();<br /> } catch (ParserConfigurationException e) {<br /> System.out.println(e.getMessage());<br /> return null;<br /> } catch (SAXException e) {<br /> System.out.println(e.getMessage());<br /> return null;<br /> } catch (IOException e) {<br /> System.out.println(e.getMessage());<br /> return null;<br /> } catch (URISyntaxException e) {<br /> System.out.println(e.getMessage());<br /> return null;<br /> }<br /> }</p> <p>}<br />

2.处理XML文件的类：

import java.util.Properties;</p> <p>import org.xml.sax.Attributes;<br /> import org.xml.sax.SAXException;<br /> import org.xml.sax.helpers.DefaultHandler;</p> <p>import com.app.common.Constants;</p> <p>public class MyDefaultHandler extends DefaultHandler {</p> <p> private Properties props;</p> <p> private String key = "";</p> <p> private StringBuffer value = new StringBuffer();</p> <p> public MyDefaultHandler() {<br /> props = new Properties();<br /> }<br /> @Override<br /> public void characters(char[] ch, int start, int length)<br /> throws SAXException {<br /> value.append(ch, start, length);<br /> }</p> <p> @Override<br /> public void endElement(String uri, String localName, String qName)<br /> throws SAXException {<br /> props.put(key, value.toString().trim());<br /> }</p> <p> @Override<br /> public void startElement(String uri, String localName, String qName,<br /> Attributes attributes) throws SAXException {<br /> value.delete(0, value.length());<br /> key = attributes.getValue(Constants.KEY);<br /> }</p> <p> public Properties getProps() {<br /> return this.props;<br /> }</p> <p>}<br />

3.main：

import java.util.Properties;</p> <p>public class TestMain {</p> <p> private static Properties properties = null;</p> <p> /**<br /> * @param args<br /> */<br /> public static void main(String[] args) {<br /> XMLUtils utils = new XMLUtils();<br /> properties = utils.getPropertiesFromXML();<br /> if (properties != null) {<br /> System.out.println(properties.getProperty("key1"));<br /> System.out.println(properties.getProperty("key2"));<br /> System.out.println(properties.getProperty("key3"));<br /> }<br /> }</p> <p>}<br />