目录多对一：怎么区分主表和副表？级联属性映射：association分步查询延迟加载一对多一对多的实现通常包括两种实现方式：collection：分步查询：延迟加载多对一：
I\'ve been attempting to write a client/server app with boost now, so far it sends and receives but I can\'t seem to just read X bytes into a vector.
加载中,请稍侯......