Qt 通过ODBC连接MySQL数据库

软件版本

• Qt Creator 4.3.1
• MySQL 5.7

连接MySQL

1. 工程 .pro文件中添加QT += sql

2. 头文件中添加如下内容：

   #include 
   #include 
   #include 
   #include 
   #include 
   
   #include 
   using namespace std;
   

3. 测试支持驱动类型

   void catDriver(){
       qDebug()<<"Available drivers:";
       QStringList drivers = QSqlDatabase::drivers();
       foreach(QString driver, drivers)
           qDebug() << driver;
   }
   

4. 连接数据库

   bool connectionSql(){
       QSqlDatabase db=QSqlDatabase::addDatabase ("QODBC3");
          QString dsn = QString("DRIVER={MySQL ODBC 8.0 Unicode Driver};"
                                "SERVER=%1;"
                                "DATABASE=%2;"
                                "UID=%3;"
                                "PWD=%4;")
                  .arg("127.0.0.1")
                  .arg("bzd")
                  .arg("root")
                  .arg("mysql");
          db.setDatabaseName(dsn);
          if(!db.open ())
          {
              cout<<"DataBase Error :"<<endl;
              qDebug()<<db.lastError().text();
          }
          else
          {
              cout<<"success"<<endl;
              QSqlQuery  query=db.exec("SELECT * FROM `sys_user`");
              while(query.next())
              {
                  cout<<(query.value(0).toInt())<< "\t";
                  cout<<string((const char *)query.value(1).toString().toLocal8Bit())<<"\t";
                  cout<<(query.value(2).toInt())<< "\t";
                  cout<<query.value(3).toInt()<<endl;
              }
          }
   }
   
   

5. 完整代码

   #include "mainwindow.h"
   #include 
   
   #include 
   #include 
   #include 
   #include 
   #include 
   
   #include 
   using namespace std;
   
   // 测试支持驱动类型
   void catDriver(){
       qDebug()<<"Available drivers:";
       QStringList drivers = QSqlDatabase::drivers();
       foreach(QString driver, drivers)
           qDebug() << driver;
   }
   
   // 连接数据库
   bool connectionSql(){
       QSqlDatabase db=QSqlDatabase::addDatabase ("ODBC");
          QString dsn = QString("DRIVER={MySQL ODBC 8.0 Unicode Driver};"
                                "SERVER=%1;"
                                "DATABASE=%2;"
                                "UID=%3;"
                                "PWD=%4;")
                  .arg("127.0.0.1")
                  .arg("bzd")
                  .arg("root")
                  .arg("mysql");
          db.setDatabaseName(dsn);
          if(!db.open ())
          {
              cout<<"DataBase Error :"<<endl;
              qDebug()<<db.lastError().text();
          }
          else
          {
              cout<<"success"<<endl;
              QSqlQuery  query=db.exec("SELECT * FROM `sys_user`");
              while(query.next())
              {
                  cout<<(query.value(0).toInt())<< "\t";
                  cout<<string((const char *)query.value(1).toString().toLocal8Bit())<<"\t";
                  cout<<(query.value(2).toInt())<< "\t";
                  cout<<query.value(3).toInt()<<endl;
              }
          }
   }
   
   int main(int argc, char *argv[])
   {
       QApplication a(argc, argv);
       
       catDriver();
       connectionSql();
   
       return a.exec();
   }