public class List2MapUtils {

 /**
  * K: key class type, V: value class type
  * 
  * @param sourceList
  * @param keyName
  *      key property
  * @param keyClass
  *      key Class type
  * @return
  */
 public static <K, V> Map<K, V> convert2Map(List<V> sourceList, String keyName, Class<K> keyClass) {
  Map<K, V> map = new HashMap<K, V>();

  if (sourceList == null || sourceList.isEmpty()) {
   return map;
  }

  for (V value : sourceList) {

   BeanWrapper beanWrapper = PropertyAccessorFactory.forBeanPropertyAccess(value);
   beanWrapper.setAutoGrowNestedPaths(true);

   K key = keyClass.cast(beanWrapper.getPropertyValue(keyName));
   if (key == null) {
    continue;
   }
   map.put(key, value);
  }

  return map;
 }
}