classpath下加载文件资源的一种方式

public class DaoFactory {private static BaseDao baseDao = null;private static DaoFactory instance = new DaoFactory();private DaoFactory() {try {Properties prop = new Properties();// 只要在类路径下就可以找到InputStream inputStream = DaoFactory.class.getClassLoader().getResourceAsStream("dao.properties");//new FileInputStream(new File("src/dao.properties"));prop.load(inputStream);String userDaoClass = prop.getProperty("userDaoClass");Class clazz =  Class.forName(userDaoClass);baseDao = (BaseDao) clazz.newInstance();} catch (Exception e) {e.printStackTrace();throw new ExceptionInInitializerError(e);}}public static DaoFactory getInstance() {return instance;}public BaseDao getBaseDao() {return baseDao;}}