load_2_files

public void test_load_2_files() {
		CompositeConfiguration config = new CompositeConfiguration();
		try {
			config.addConfiguration(new PropertiesConfiguration(
					"user.properties"));
			config.addConfiguration(new PropertiesConfiguration(
					"app.properties"));

			Configuration extConfig = config.interpolatedConfiguration();

			Iterator<String> iter = extConfig.getKeys();
			while (iter.hasNext()) {
				String key = iter.next();
				Object value = extConfig.getProperty(key);
				System.out.println("key=" + key + ",value=" + value);
			}

		} catch (ConfigurationException e) {
			e.printStackTrace();
		}
	}