code: public static List<String> getStringsWithGroup(String groupName,String...keys){
          try {
          	if(JedisProviderFactory.isCluster(groupName)){
          		return JedisProviderFactory.getMultiKeyJedisClusterCommands(groupName).mget(keys);
          	}else{
          		return JedisProviderFactory.getMultiKeyCommands(groupName).mget(keys);
          	}
  		} finally {
  			JedisProviderFactory.getJedisProvider(groupName).release();
  		}
  	}
docs: 按key批量从redis获取值（指定缓存组名）
  @param groupName
  @param keys
  @return list<String>