BeanFactory.java

package cn.jcenterhome.util;

import java.util.HashMap;
import java.util.Map;

import javax.xml.parsers.DocumentBuilderFactory;

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


public final class BeanFactory {
	private static Map<String, Object> map = null;
	
	static {
		map = new HashMap<String, Object>();
		try {
			Document doc = DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(
					FileHelper.getResourceAsStream("/beanfactory.xml"));
			NodeList daos = doc.getElementsByTagName("bean");
			Element e = null;
			int length = daos.getLength();
			for (int i = 0; i < length; i++) {
				e = (Element) daos.item(i);
				map.put(e.getAttribute("name"), Class.forName(e.getAttribute("class")).newInstance());
			}
		} catch (Exception ex) {
			ex.printStackTrace();
		}
	}

	
	public static Object getBean(String beanName) {
		return map.get(beanName);
	}
}