24.qint64转QString 以及获取文件属性

• qint64转QString

   qint64 size = info.size();
       //qint64 转QString
       QString size2 = tr("%1").arg(size);

• 获取文件属性

   #include "mainwindow.h"
   #include "ui_mainwindow.h"
   3 #include <QFileDialog>
   4 #include <QDebug>
   5 #include <QFileInfo>
   6 #include <QDateTime>
  
   MainWindow::MainWindow(QWidget *parent) :
       QMainWindow(parent),
       ui(new Ui::MainWindow)
   {
       ui->setupUi(this);
   }
  
   MainWindow::~MainWindow()
   {
       delete ui;
   }
  
   void MainWindow::on_pushButton_clicked()
   {
  22     QString str = QFileDialog::getOpenFileName(this,"openfile","/","*.*");
  23     ui->lineEdit->setText(str);
  
       QString strall;
       //根据路径初始化
       QFileInfo info(str);
  
       qint64 size = info.size();
       //qint64 转QString
       QString size2 = tr("%1").arg(size);
       QDateTime created = info.created();
       QDateTime lastchange = info.lastModified();
       QDateTime lastread = info.lastRead();
  
       strall = strall + "文件大小:" + size2 + "\n";
  37     strall = strall + "创建时间:" + created.toString() + "\n";
  38     strall = strall + "最后修改时间:" + lastchange.toString() + "\n";
  39     strall = strall + "最后阅读时间:" + lastread.toString() + "\n";
  
       //判断是否是目录
       bool isdir = info.isDir();
       //判断是否是exe
       bool isexe = info.isExecutable();
       //判读是否为隐藏文件
       info.isHidden();
       //判断是否为文件
       info.isFile();
       //判断是否为根目录
       info.isRoot();
       //判断是否为只读
       info.isReadable();
  
       ui->textEdit->setText(strall);
  
   }

• 运行效果
•