采用connector-c++ 8.0操作数据库

1.下载最新的Connector
https://dev.mysql.com/downloads/connector/cpp/，下载带debug的库。

解压缩到本地，本次使用的是带debug模式的connector库：

注：其中mysqlcppconn与mysqlcppconn8的区别是：

2.在cmakelist中定义寻址头文件的路径与库的路径

#定义头文件需要寻址的路径
include_directories(D:/Library/mysql-connector-c++-8.2.0-winx64/include/jdbc
)#定义库文件需要寻址的路径
link_directories(D:/Library/mysql-connector-c++-8.2.0-winx64/lib64/vs14/debug
)target_link_libraries(QtDemo2Qt5::CoreQt5::GuiQt5::Widgets......mysqlcppconn
)

3.复制对应的DLL到可执行目录
把D:\Library\mysql-connector-c+±8.2.0-winx64\lib64\debug中的mysqlcppconn-9-vs14.dll复制到项目的可执行目录下。

3.基础使用
https://dev.mysql.com/doc/connector-cpp/1.1/en/connector-cpp-examples-connecting.html

#include "sql_connector.h"
#include "string"
#include <QDebug>#include "mysql_connection.h"
#include "cppconn/driver.h"
#include "cppconn/exception.h"
#include "cppconn/prepared_statement.h"void SqlConnector::process()
{qDebug("SqlConnector started....");std::string server = "tcp://localhost:3306";std::string username = "root";std::string password = "Xi1ozh#1";sql::Driver* driver;sql::Connection* connection;try{driver = get_driver_instance();connection = driver->connect(server, username, password);connection->setSchema("ws300");}catch (sql::SQLException e){std::cout << "Could not connect to server. Error message: " << e.what() << "\n";}//查询sql::SQLString sql("select * from users;");std::unique_ptr<sql::Statement> statment(connection->createStatement());statment->execute("set names utf8mb4");std::unique_ptr<sql::ResultSet> result(statment->executeQuery(sql));while (result->next()){auto data = result->getString("password").asStdString();qDebug("SqlConnector username: %s", data.c_str());}result->close();statment->close();connection->close();delete connection;qDebug("SqlConnector finished....");
}