【Qt5开发及实例】27、获得文件的信息

fileinfo.h

/**
* 书本:【Qt5开发及实例】
* 功能:获得文件的信息
* 文件:fileinfo.h
* 时间:2015年2月4日17:23:38
* 作者:cutter_point
*/

#ifndef FILEINFO_H
#define FILEINFO_H

#include <QDialog>
#include <QLabel>
#include <QPushButton>
#include <QLineEdit>
#include <QCheckBox>

class fileinfo : public QDialog
{
  Q_OBJECT

public:
  fileinfo(QWidget *parent = 0, Qt::WindowFlags f = 0);
  ~fileinfo();

public slots:
  //按钮文件响应的事件槽函数
  void slotFile();
  //按钮获得文件信息槽函数
  void slotGet();

private:
  //一共是6个label 5个lineEdit 2个pushbutton 7个checkbox
  //第一行
  QLabel *fileNameLabel;
  QLineEdit *fileNameLineEdit;
  QPushButton *fileBtn;

  //第二行
  QLabel *sizeLabel;
  QLineEdit *sizeLineEdit;

  //第三行
  QLabel *createTimeLabel;
  QLineEdit *createTimeLineEdit;

  //第四行
  QLabel *lastModifiedLabel;
  QLineEdit *lastModifiedLineEdit;

  //第五行
  QLabel *lastReadLabel;
  QLineEdit *lastReadLineEdit;

  //最后选择框
  QLabel *propertyLabel;
  QCheckBox *isDirCheckBox;
  QCheckBox *isFileCheckBox;
  QCheckBox *isSymLinkCheckBox;
  QCheckBox *isHiddenCheckBox;
  QCheckBox *isReadableCheckBox;
  QCheckBox *isWritableCheckBox;
  QCheckBox *isExecutableCheckBox;

  QPushButton *getBtn;


};

#endif // FILEINFO_H

fileinfo.cpp

/**
* 书本:【Qt5开发及实例】
* 功能:获得文件的信息
* 文件:fileinfo.h
* 时间:2015年2月4日17:23:38
* 作者:cutter_point
*/

#include "fileinfo.h"

#include <QGridLayout>
#include <QHBoxLayout>
#include <QVBoxLayout>
#include <QFileDialog>
#include <QDateTime>

fileinfo::fileinfo(QWidget *parent, Qt::WindowFlags f)
  : QDialog(parent, f)
{
  fileNameLabel = new QLabel(tr("文件名："));
  fileNameLineEdit = new QLineEdit;
  fileBtn = new QPushButton(tr("文件"));

  sizeLabel = new QLabel(tr("大小:"));
  sizeLineEdit = new QLineEdit;

  createTimeLabel = new QLabel(tr("创建时间:"));
  createTimeLineEdit = new QLineEdit;

  lastModifiedLabel = new QLabel(tr("最后修改时间："));
  lastModifiedLineEdit = new QLineEdit;

  lastReadLabel = new QLabel(tr("最后访问时间："));
  lastReadLineEdit = new QLineEdit;

  propertyLabel = new QLabel(tr("属性："));

  isDirCheckBox = new QCheckBox(tr("目录"));
  isFileCheckBox = new QCheckBox(tr("文件"));
  isSymLinkCheckBox = new QCheckBox(tr("符号连接"));
  isHiddenCheckBox = new QCheckBox(tr("隐藏"));
  isReadableCheckBox = new QCheckBox(tr("可读"));
  isWritableCheckBox = new QCheckBox(tr("可写"));
  isExecutableCheckBox = new QCheckBox(tr("执行"));

  getBtn = new QPushButton(tr(" 获得文件信息:"));

  QGridLayout *gridLayout = new QGridLayout;
  //fileNameLabel = new QLabel(tr("文件名："));
  gridLayout->addWidget(fileNameLabel, 0, 0);
  gridLayout->addWidget(fileNameLineEdit, 0, 1);
  gridLayout->addWidget(fileBtn, 0, 2);

  //sizeLabel = new QLabel(tr("大小："));
  gridLayout->addWidget(sizeLabel, 1, 0);
  gridLayout->addWidget(sizeLineEdit, 1, 1, 1, 2);

  //createTimeLabel = new QLabel(tr("创建时间："));
  gridLayout->addWidget(createTimeLabel, 2, 0);
  gridLayout->addWidget(createTimeLineEdit, 2, 1, 1, 2);

  // lastModifiedLabel = new QLabel(tr("最后修改时间："));
  gridLayout->addWidget(lastModifiedLabel,3,0);
  gridLayout->addWidget(lastModifiedLineEdit,3,1,1,2);

  // lastReadLabel = new QLabel(tr("最后访问时间："));
  gridLayout->addWidget(lastReadLabel,4,0);
  gridLayout->addWidget(lastReadLineEdit,4,1,1,2);

  //然后就是我们的属性行和多选框
  QHBoxLayout *layout2 = new QHBoxLayout;
  layout2->addWidget(propertyLabel);    //属性
  layout2->addStretch();    //弹簧

  QHBoxLayout *layout3 = new QHBoxLayout;
  layout3->addWidget(isDirCheckBox);
  layout3->addWidget(isFileCheckBox);
  layout3->addWidget(isSymLinkCheckBox);
  layout3->addWidget(isHiddenCheckBox);
  layout3->addWidget(isReadableCheckBox);
  layout3->addWidget(isWritableCheckBox);
  layout3->addWidget(isExecutableCheckBox);

  //最后一个按钮
  QHBoxLayout *layout4 = new QHBoxLayout;
  layout4->addWidget(getBtn);

  //把所有空间竖着排列
  QVBoxLayout *mainLayout = new QVBoxLayout(this);
  mainLayout->addLayout(gridLayout);
  mainLayout->addLayout(layout2);
  mainLayout->addLayout(layout3);
  mainLayout->addLayout(layout4);

  connect(fileBtn, SIGNAL(clicked()), this, SLOT(slotFile()));
  connect(getBtn, SIGNAL(clicked()), this, SLOT(slotGet()));

}

//按钮文件响应的事件槽函数
//void slotFile();
void fileinfo::slotFile()
{
  //打开文件的对话框
  QString fileName = QFileDialog::getOpenFileName(this, " 打开 ", "/", "files(*)");
  fileNameLineEdit->setText(fileName);

}


//按钮获得文件信息槽函数
//void slotGet();
void fileinfo::slotGet()
{
  QString file = fileNameLineEdit->text();    //获取文件路径
  QFileInfo info(file);

  qint64 size = info.size();

    QDateTime created = info.created();   //文件创建时间
    QDateTime lastModified = info.lastModified(); //文件最后一次修改的时间
    QDateTime lastRead = info.lastRead();   //文件最后一次访问时间

    bool isDir = info.isDir();    //这个是目录
    bool isFile = info.isFile();    //是文件
    bool isSymLink = info.isSymLink();    //符号连接
    bool isHidden = info.isHidden();    //隐藏文件
    bool isReadable = info.isReadable();    //可读文件
    bool isWritable = info.isWritable();    //可写文件
    bool isExecutable = info.isExecutable();    //可执行文件

    sizeLineEdit->setText(QString::number(size));   //文件大小
    createTimeLineEdit->setText(created.toString());    //创建时间
    lastModifiedLineEdit->setText(lastModified.toString());   //最后一次修改的时间
    lastReadLineEdit->setText(lastRead.toString());   //最后一次访问时间

//    isDirCheckBox->setCheckState(isDir ? Qt::Checked : Qt::Unchecked);
    //是否选择，这个多选框
    isDirCheckBox->setCheckState(isDir?Qt::Checked:Qt::Unchecked);
    isFileCheckBox->setCheckState(isFile?Qt::Checked:Qt::Unchecked);
    isSymLinkCheckBox->setCheckState(isSymLink?Qt::Checked:Qt::Unchecked);
    isHiddenCheckBox->setCheckState(isHidden?Qt::Checked:Qt::Unchecked);
    isReadableCheckBox->setCheckState(isReadable?Qt::Checked:Qt::Unchecked);
    isWritableCheckBox->setCheckState(isWritable?Qt::Checked:Qt::Unchecked);
    isExecutableCheckBox->setCheckState(isExecutable?Qt::Checked:Qt:: Unchecked);
}


fileinfo::~fileinfo()
{

}

运行结果

【Qt5开发及实例】27、获得文件的信息

原文：http://blog.csdn.net/cutter_point/article/details/43973073