详解Ubuntu10.10下Qt连接Mysql数据库

转载自：http://mobile.51cto.com/symbian-273262.htm

 

详解Ubuntu10.10下Qt连接Mysql数据库是本文要介绍的内容，很详细的步骤，我们先来看内容。

第一步：安装qt开发环境

xhy@xhy-desktop:~$sudo apt-get install qt4-dev-tools qt4-doc qt4-qtconfig qt4-demos qt4-designer

第二步：安装mysql开发环境

xhy@xhy-desktop:~$sudo apt-get install mysql-server mysql-client
xhy@xhy-desktop:~$sudo apt-get install libmysqlclient15-dev
xhy@xhy-desktop:~$sudo apt-get install libqt4-sql-mysql
xhy@xhy-desktop:~$sudo /etc/init.d/mysql restart

第三步：给普通用户授权操作数据库

xhy@xhy-desktop:~$ mysql -u root -p      (root登录数据库)
mysql> create database mydb;                     (创建一个数据库)
mysql> grant all privileges on *.* to username@localhost identified by 'password';
mysql> quit;

给特定用户分配数据操作权限的格式是:

grant 权限1,权限2,...权限n on 数据库名称.表名称 to 用户名@用户ip地址 identified by '密码';

第四步：测试环境

#include <QApplication>
#include <QtSql>
#include <QTableView>
#include <iostream>

using namespace std;

int main(int argc, char *argv[])
{
QApplication app(argc, argv);

QSqlDatabase db = QSqlDatabase::addDatabase("QMYSQL");
db.setHostName("localhost");
db.setDatabaseName("mydb");
db.setUserName("username");
db.setPassword("password");
db.open();

QSqlQuery query;
query.exec("create table hello(id bigint not null auto_increment,name varchar(255),age bigint,primary key (id))");
/*query.exec("insert into hello(name, age) values('xiaoxi', 18)");
query.exec("insert into hello(name, age) values('xiaonan', 19)");
query.exec("insert into hello(name, age) values('xiaobei', 20)");
query.exec("insert into hello(name, age) values('xiaodong', 21)");*/

//ODBC风格
query.prepare("insert into hello(name, age)" "values(?, ?)");
query.addBindValue("xiaoxi");
query.addBindValue(18);
query.exec();
query.addBindValue("xiaonan");
query.addBindValue(19);
query.exec();
query.addBindValue("xiaobei");
query.addBindValue(20);
query.exec();
query.addBindValue("xiaodong");
query.addBindValue(21);
query.exec();

//Oracle风格
/*query.prepare("insert into hello(name, age) values(:name, :age)");
query.bindValue(":name", "xiaoxi");
query.bindValue(":age", 18);
query.exec();
query.bindValue(":name", "xiaonan");
query.bindValue(":age", 19);
query.exec();
query.bindValue(":name", "xiaobei");
query.bindValue(":age", 20);
query.exec();
query.bindValue(":name", "xiaodong");
query.bindValue(":age", 21);
query.exec();*/

QSqlQueryModel *model = new QSqlQueryModel;
model->setQuery("select * from hello");
model->setHeaderData(0, Qt::Horizontal, "id");
model->setHeaderData(1, Qt::Horizontal, "name");
model->setHeaderData(2, Qt::Horizontal, "age");
QTableView *view = new QTableView;
view->setWindowTitle("QSqlQueryModel");
view->setModel(model);
view->show();

/*QSqlTableModel *model = new QSqlTableModel;
model->setTable("hello");
model->select();
for (int i = 0; i < model->rowCount(); ++i)
{
QSqlRecord record = model->record(i);
int id = record.value(0).toInt();
QString name = record.value(1).toString();
int age = record.value(2).toInt();
cout << id << " " << qPrintable(name) << " " << age << endl;
}*/
db.close();
return app.exec();
}

编译：

xhy@xhy-desktop:~$ qmake -project
xhy@xhy-desktop:~$ qmake

一定别忘了在工程的.pro文件里加上下面一行:

QT += sql
xhy@xhy-desktop:~$make
xhy@xhy-desktop:~$./mysql