while (em.hasMoreElements()) {
properties.putAll(getProperties((URL) em.nextElement()));
}
StringBuilder sb = new StringBuilder();
@SuppressWarnings("rawtypes")
List keys = CollectUtils.newArrayList(properties.keySet());
Collections.sort(keys);
for (Iterator<String> iter = keys.iterator(); iter.hasNext();) {
String key = iter.next();
String value = (String) properties.get(key);
if (key == null) { throw new IOException(