Question

我不确定如何在Ubuntu Linux上使用C ++连接到MySQL数据库。具体来说，我希望能够创建一个名为“ new ”的数据库。我不确定在哪里放置查询。下面是我正在使用的代码。

driver = get_driver_instance（）; 向我提供错误消息对'get_driver_instance'的未定义引用

#include <cstdlib>
#include "mysql_driver.h"
#include "mysql_connection.h"
#include <cppconn/driver.h>
#include <cppconn/exception.h>
#include <cppconn/resultset.h>
#include <cppconn/statement.h>
using namespace std;

int main(int argc, char** argv) {

cout << endl;
cout << "Running 'SELECT 'Hello World!' AS _message'..." << endl;

try {
  sql::Driver *driver;
  sql::Connection *con;
  sql::Statement *stmt;
  sql::ResultSet *res;

 /* Create a connection */
 driver = get_driver_instance();
 /* Write your own driver details */
 con = driver->connect("tcp://127.0.0.1:3306", "root", "pass");
 /* Connect to the MySQL test database */
 con->setSchema("test");

 stmt = con->createStatement();
 res = stmt->executeQuery("SELECT 'Hello World!' AS _message");
 while (res->next()) {
   cout << "\t... MySQL replies: ";
 /* Access column data by alias or column name */
cout << res->getString("_message") << endl;
cout << "\t... MySQL says it again: ";
/* Access column data by numeric offset, 1 is the first column */
cout << res->getString(1) << endl;
}
delete res;
delete stmt;
delete con;

}catch (sql::SQLException &e) {
  cout << "# ERR: SQLException in " << __FILE__;
  cout << "(" << __FUNCTION__ << ") on line ";
  cout  << __LINE__ << endl;
  cout << "# ERR: " << e.what();
  cout << " (MySQL error code: " << e.getErrorCode();
  cout << ", SQLState: " << e.getSQLState() << " )" << endl;
}

 cout << endl;

 return EXIT_SUCCESS;
}

Answer 1

在终端上尝试此命令：

~# sudo g++ -Wall -I/usr/include/cppconn -o <output name> <codename.cpp> -L/usr/lib -lmysqlcppconn

如何用C ++连接MySQL数据库（ubuntu）

1 个答案: