浅谈对象与Map相互转化

 /** 
 * 将对象装换为map 
 * @param bean 
 * @return 
 */
public static <T> Map<String, Object> beanToMap(T bean) { 
  Map<String, Object> map = Maps.newHashMap(); 
  if (bean != null) { 
    BeanMap beanMap = BeanMap.create(bean); 
    for (Object key : beanMap.keySet()) { 
      map.put(key+"", beanMap.get(key)); 
    }       
  } 
  return map; 
} 
/** 
 * 将map装换为javabean对象 
 * @param map 
 * @param bean 
 * @return 
 */
public static <T> T mapToBean(Map<String, Object> map,T bean) { 
  BeanMap beanMap = BeanMap.create(bean); 
  beanMap.putAll(map); 
  return bean; 
} 
/** 
 * 将List<T>转换为List<Map<String, Object>> 
 * @param objList 
 * @return 
 * @throws JsonGenerationException 
 * @throws JsonMappingException 
 * @throws IOException 
 */
public static <T> List<Map<String, Object>> objectsToMaps(List<T> objList) { 
  List<Map<String, Object>> list = Lists.newArrayList(); 
  if (objList != null && objList.size() > 0) { 
    Map<String, Object> map = null; 
    T bean = null; 
    for (int i = 0,size = objList.size(); i < size; i++) { 
      bean = objList.get(i); 
      map = beanToMap(bean); 
      list.add(map); 
    } 
  } 
  return list; 
} 
/** 
 * 将List<Map<String,Object>>转换为List<T> 
 * @param maps 
 * @param clazz 
 * @return 
 * @throws InstantiationException 
 * @throws IllegalAccessException 
 */
public static <T> List<T> mapsToObjects(List<Map<String, Object>> maps,Class<T> clazz) throws InstantiationException, IllegalAccessException { 
  List<T> list = Lists.newArrayList(); 
  if (maps != null && maps.size() > 0) { 
    Map<String, Object> map = null; 
    T bean = null; 
    for (int i = 0,size = maps.size(); i < size; i++) { 
      map = maps.get(i); 
      bean = clazz.newInstance(); 
      mapToBean(map, bean); 
      list.add(bean); 
    } 
  } 
  return list; 
}