\Config::set('database.connections.mysql.host',$project_db_setting->host);
\Config::set('database.connections.mysql.port',$project_db_setting->port);
\Config::set('database.connections.mysql.database',$project_db_setting->database);
\Config::set('database.connections.mysql.username',$project_db_setting->username);
\Config::set('database.connections.mysql.password',$project_db_setting->password);
//下面这句很重要，要重连下数据库，要不然，连的还是原数据库
\DB::reconnect();
