数据库连接池的管理,只有当用户真正需要进行数据库操作时，系统才从连接池申请一个连接，数据库操作完毕，连接立即释放到连接池中，以供其他用户使用。这样，不仅大大提高了数据库连接的使用效率，使得大量用户可以共享较少的数据库连接，而且省去了建立连接的时间。-Database connection pool management, and only when the user genuine need to carry out database operations, the system only from the connection pool to apply for a connection, the database operation has finished, connect the immediate release of the connection pool for other users. In this way, not only greatly improve the efficiency in the use of database connection, making a large number of users can be shared with less database connection, and eliminates the need to establish a connection time.