// // Created by dongl on 23-4-25. // #include "linkDB.h" DB::DB() {} DB::~DB() { delete pool; } ConnectionPool* DB::pool = nullptr; mysqlpp::Connection* DB::link() { if (pool == nullptr) { pool = new ConnectionPool("124.221.152.192", "ims", "IMS", "WimTFC8N58kznx2k"); } return pool->safe_grab(); }