构建自己的commons

web项目中加载配置信息，废话不说，直接上代码

 

			ClassLoader loader = Thread.currentThread().getContextClassLoader();
			URL url = null;
			String propertyName = "url.properties";

			if (loader instanceof URLClassLoader) {
				URLClassLoader ucl = (URLClassLoader) loader;
				url = ucl.findResource(propertyName);
			}
			if (url == null) {
				url = loader.getResource(propertyName);
			}
			if (url == null) {
				System.out.println("No properties file: " + propertyName + " found");
			} else {
				Properties bundle = new Properties();
				InputStream is = url.openStream();
				if (is != null) {
					bundle.load(is);
					is.close();
				} else {
					throw new IOException("Properties file " + propertyName + " not available");
				}
				Enumeration<?> propertyNames = bundle.propertyNames();
				while (propertyNames.hasMoreElements()) {
					String key = (String) propertyNames.nextElement();
					String value = bundle.getProperty(key);
					groupListMap.put(key, Arrays.asList(value.split(",")));
					System.out.print("Loaded user " + key + ":");
					for (String role : groupListMap.get(key)) {
						System.out.print(" " + role);
					}
					System.out.println();
				}
			}