读取配置文件

package cms.utils;

import java.io.IOException;
import java.util.Properties;

import cms.backend.dao.ArticleDao;

public class PropertiesBeanFactory implements BeanFactory {
	Properties pro = new Properties();

	public PropertiesBeanFactory() {
		// 读取配置文件
		try {
			pro.load(Thread.currentThread().getContextClassLoader().getResourceAsStream("beans.properties"));
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

	public ArticleDao getArtcleDao() {
		String className = pro.getProperty("articleDao");
		try {
			Class clazz = Class.forName(className);
			//new 一个对象
			return (ArticleDao) clazz.newInstance();
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
		} catch (InstantiationException e) {
			e.printStackTrace();
		} catch (IllegalAccessException e) {
			e.printStackTrace();
		}
		return null;
	}
}