文件属性

#include <QCoreApplication>

//Qt Console Application   桌面控制台

#include <QDir>//文件夹

#include <QDebug>

int main(int argc, char *argv[])

{

    QCoreApplication a(argc, argv);
//QDir 提供的static 方法  

    qDebug()<<"home:"<<QDir::homePath();

    qDebug()<<"root:"<<QDir::rootPath();

    qDebug()<<"temp:"<<QDir::tempPath();

    return a.exec();

}

#include "mainwindow.h"

#include "ui_mainwindow.h"

#include <QFileInfo>//文件属性

#include <QFileDialog>

#include <QDateTime>  //时间类型的类

#include <QMessageBox>

#include <QDir>

//  qint64   longlong

//  接口与实现  的切换   F4

MainWindow::MainWindow(QWidget *parent) :

    QMainWindow(parent),

    ui(new Ui::MainWindow)

{

    ui->setupUi(this);

}

MainWindow::~MainWindow()

{

    delete ui;

}

void MainWindow::on_openfile_clicked()

{

    QString filename = QFileDialog::getOpenFileName(this,"Open File",QDir::homePath());

    if(filename.isEmpty())

        {

       // QMessageBox::information(this,"open file error","filename is Empty");

        QMessageBox::information(this,"Error Message","Please Select a file!");

        return;

    }

    //实例化对象

    QFileInfo fileinfo(filename);

    //  把数字转化为字符呈

    ui->filesize->setText(QString::number(fileinfo.size()));

    //时间

    QDateTime createtime=fileinfo.created();

    //将时间类型转化为QString

    ui->createtime->setText(createtime.toString("yyyy-MM-dd hh:mm:ss"));

    QDateTime lasttime=fileinfo.lastRead();

    //将时间类型转化为QString

    ui->accesstime->setText(lasttime.toString("yyyy-MM-dd hh:mm:ss"));

    if(fileinfo.isDir())

        {

        ui->isdir->setText("是");

    }

    else

        {

        ui->isdir->setText("不是");

    }

}

void MainWindow::on_pushButton_clicked()

{

}