qt实现通过界面输入数据库表名和列数据信息，创建一张数据库表的程序

下面是一个简单的 Qt 程序，可以通过界面输入数据库表名和列数据信息，创建一张数据库表。

#include <QtWidgets>
#include <QtSql>

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    
    // 创建数据库连接
    QSqlDatabase db = QSqlDatabase::addDatabase("QSQLITE");
    db.setDatabaseName("mydatabase.db");
    if (!db.open()) {
        QMessageBox::critical(nullptr, QObject::tr("无法打开数据库"),
                              QObject::tr("无法建立到指定数据库的连接。"),
                              QMessageBox::Cancel);
        return -1;
    }
    
    // 创建界面
    QWidget window;
    window.setWindowTitle("创建数据库表");
    
    QLabel *labelTableName = new QLabel("表名：");
    QLineEdit *editTableName = new QLineEdit;
    QHBoxLayout *layoutTableName = new QHBoxLayout;
    layoutTableName->addWidget(labelTableName);
    layoutTableName->addWidget(editTableName);
    
    QLabel *labelColumnNames = new QLabel("列名（用逗号分隔）：");
    QLineEdit *editColumnNames = new QLineEdit;
    QHBoxLayout *layoutColumnNames = new QHBoxLayout;
    layoutColumnNames->addWidget(labelColumnNames);
    layoutColumnNames->addWidget(editColumnNames);
    
    QLabel *labelColumnTypes = new QLabel("列类型（用逗号分隔）：");
    QLineEdit *editColumnTypes = new QLineEdit;
    QHBoxLayout *layoutColumnTypes = new QHBoxLayout;
    layoutColumnTypes->addWidget(labelColumnTypes);
    layoutColumnTypes->addWidget(editColumnTypes);
    
    QVBoxLayout *layout = new QVBoxLayout;
    layout->addLayout(layoutTableName);
    layout->addLayout(layoutColumnNames);
    layout->addLayout(layoutColumnTypes);
    
    QPushButton *buttonCreateTable = new QPushButton("创建表");
    layout->addWidget(buttonCreateTable);
    
    window.setLayout(layout);
    window.show();
    
    // 创建表
    QObject::connect(buttonCreateTable, &QPushButton::clicked, [&]() {
        QString tableName = editTableName->text();
        QString columnNames = editColumnNames->text();
        QString columnTypes = editColumnTypes->text();
        QStringList columnNamesList = columnNames.split(",");
        QStringList columnTypesList = columnTypes.split(",");
        if (columnNamesList.size() != columnTypesList.size()) {
            QMessageBox::critical(nullptr, QObject::tr("错误"),
                                  QObject::tr("列名和列类型的数量不一致。"),
                                  QMessageBox::Cancel);
            return;
        }
        QSqlQuery query(db);
        QString sql = QString("CREATE TABLE %1 (").arg(tableName);
        for (int i = 0; i < columnNamesList.size(); ++i) {
            sql += QString("%1 %2,").arg(columnNamesList[i]).arg(columnTypesList[i]);
        }
        sql.chop(1); // 去掉最后一个逗号
        sql += ")";
        if (!query.exec(sql)) {
            QMessageBox::critical(nullptr, QObject::tr("错误"),
                                  query.lastError().text(),
                                  QMessageBox::Cancel);
            return;
        }
        QMessageBox::information(nullptr, QObject::tr("成功"),
                                 QObject::tr("创建表成功。"),
                                 QMessageBox::Ok);
    });
    
    return app.exec();
}

该程序创建一个包含三个文本框和一个按钮的窗口，用户可以在文本框中输入表名、列名和列类型，然后单击按钮创建表。注意，该程序仅限于 SQLite 数据库，如果您使用的是其他类型的数据库，请修改 `QSqlDatabase::addDatabase` 和 `QSqlQuery` 的参数。