Qt之操作数据库(SQLite)实例
时间:2021-07-01 10:21:17
帮助过:13人阅读
<QSql>
#include <QSqlDatabase>
#include <QSqlError>
#include <QSqlQuery>
#include <QString>
#include <QFile>
#include <QDebug>
#include <QVariantList>
int main(
int argc,
char *
argv[])
{
QCoreApplication a(argc, argv);
QSqlDatabase database = QSqlDatabase::addDatabase(
"QSQLITE");
database.setDatabaseName("CashSystem.db");
if(database.open())
{
qDebug()<<
"Database Opened";
QSqlQuery sql_query;
QString create_sql =
"create table member (id int primary key, name varchar(30), address varchar(30))";
//创建数据表
QString insert_sql =
"insert into member values(?,?,?)";
//插入数据
QString select_all_sql =
"select * from member";
sql_query.prepare(create_sql); //创建表
if(!sql_query.exec())
//查看创建表是否成功
{
qDebug()<<QObject::tr(
"Table Create failed");
qDebug()<<
sql_query.lastError();
}
else
{
qDebug()<<
"Table Created" ;
//插入数据
sql_query.prepare(insert_sql);
QVariantList GroupIDs;
GroupIDs.append(0);
GroupIDs.append(1);
GroupIDs.append(2);
QVariantList GroupNames;
GroupNames.append("hsp");
GroupNames.append("rl");
GroupNames.append("spl");
QVariantList GroupAddress;
GroupAddress.append("南充");
GroupAddress.append("宝鸡");
GroupAddress.append("南充");
sql_query.addBindValue(GroupIDs);
sql_query.addBindValue(GroupNames);
sql_query.addBindValue(GroupAddress);
if(!
sql_query.execBatch())
{
qDebug()<<
sql_query.lastError();
}
else
{
qDebug()<<
"插入记录成功";
}
//查询所有记录
sql_query.prepare(select_all_sql);
if(!
sql_query.exec())
{
qDebug()<<
sql_query.lastError();
}
else
{
while(sql_query.next())
{
int id = sql_query.value(
0).toInt();
QString name = sql_query.value(
1).toString();
QString address = sql_query.value(
2).toString();
qDebug()<<QString(
"ID:%1 Name:%2 Address:%3").arg(id).arg(name).arg(address);
}
}
}
}
database.close();
// QFile::remove("CashSystem.db");
return a.exec();
}
4、运行截图:
5、在项目的debug文件夹下,生成了对应的.db文件,使用navicat forSqlite工具打开,显示结果如下:
参考链接:
1、Qt之操作数据库(SQLite)实例
2、Qt---自带的数据库QSQLITE
3、在Qt中使用SQLite数据库
Qt之操作数据库(SQLite)实例
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