appsettingshandler.java

一个用struts tiles的在线影院web系统

package com.blue.web.common.util;


import org.w3c.dom.Element;
import org.w3c.dom.Document;

import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import java.net.URL;
import org.xml.sax.SAXParseException;

/**
 * 读取用户配置文件操作类
 * @author Lucifer
 *
 */
public class AppSettingsHandler {
	/**
	 * 创建AppSettings对象
	 * @param configURL	指向配置文件的URL
	 * @return
	 */
	public Object create(String configURL) {
		AppSettings config = AppSettings.getInstance();
		Element root = loadDocument(configURL);
		config.loadValuesFromConfigurationXml(root);
		return config;
	}
	/**
	 * 文件读取并格式化成XML Element对象
	 * @param configURL
	 * @return
	 */
	public Element loadDocument(String configURL) {
		Document doc = null;
		try {
			URL url = new URL(configURL);
			InputSource xmlInp = new InputSource(url.openStream());
			DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory.newInstance();
			DocumentBuilder parser = docBuilderFactory.newDocumentBuilder();
			doc = parser.parse(xmlInp);
			Element root = doc.getDocumentElement();
			root.normalize();
			XMLUtils.toXmlString(root);
			return root;
		} catch (SAXParseException err) {
			System.err.println("PassportConfigDataHandler.loadDocument : SAXParseException");
		} catch (SAXException e) {
			System.err.println("PassportConfigDataHandler.loadDocument : SAXException");
		} catch (java.net.MalformedURLException mfx) {
			System.err.println("PassportConfigDataHandler.loadDocument : MalformedURLException");
		} catch (java.io.IOException e) {
			System.err.println("PassportConfigDataHandler.loadDocument : IOException");
		} catch (Exception pce) {
			System.err.println("PassportConfigDataHandler.loadDocument : Exception");
		}
		return null;
	}
}