Qt开发之获取文件元数据的信息

效果展示：

源码如下：

头文件(.h)

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QWidget>
#include <QLabel>
#include <QLineEdit>
#include <QPushButton>
#include <QCheckBox>
#include <QHBoxLayout>
#include <QVBoxLayout>
#include <QGridLayout>
#include <QFileDialog>
#include <QDateTime>

class MainWindow : public QWidget
{
    Q_OBJECT

public:
    MainWindow(QWidget *parent = nullptr);
    ~MainWindow();

private slots:
    void onGetFile(); //打开文件

private:
    QLabel *m_pFileNameLabel;
    QLabel *m_pFileSizeLabel;
    QLabel *m_pFileCreateTimeLabel;
    QLabel *m_pFileLastModifiedTimeLabel;
    QLabel *m_pFileLastReadTimeLabel;

    QLineEdit *m_pFileNameEdit;
    QLineEdit *m_pFileSizeEdit;
    QLineEdit *m_pFileCreateTimeEdit;
    QLineEdit *m_pFileLastModifiedTimeEdit;
    QLineEdit *m_pFileLastReadTimeEdit;

    QPushButton *m_pFileButton;

    QLabel *m_pFilePropertyLabel;
    QCheckBox *m_pDirCheckBox;
    QCheckBox *m_pFileCheckBox;
    QCheckBox *m_pSymLinkCheckBox;
    QCheckBox *m_pHiddenCheckBox;
    QCheckBox *m_pReadableCheckBox;
    QCheckBox *m_pWriteableCheckBox;
    QCheckBox *m_pExecuteAbleCheckBox;
};
#endif // MAINWINDOW_H

源文件(.cpp)　

#include "main_window.h"

MainWindow::MainWindow(QWidget *parent)
    : QWidget(parent)
{
    this->setWindowTitle("获取文件元数据的信息");

    m_pFileNameLabel = new QLabel("文件名称：", this);
    m_pFileNameEdit = new QLineEdit(this);

    m_pFileButton = new QPushButton("选择文件...", this);
    connect(m_pFileButton, &QPushButton::clicked, this, &MainWindow::onGetFile);

    m_pFileSizeLabel = new QLabel("文件大小：", this);
    m_pFileSizeEdit = new QLineEdit(this);

    m_pFileCreateTimeLabel = new QLabel("创建时间：", this);
    m_pFileCreateTimeEdit = new QLineEdit(this);

    m_pFileLastModifiedTimeLabel = new QLabel("最后修改时间：", this);
    m_pFileLastModifiedTimeEdit = new QLineEdit(this);

    m_pFileLastReadTimeLabel = new QLabel("最后访问时间：", this);
    m_pFileLastReadTimeEdit = new QLineEdit(this);

    m_pFilePropertyLabel = new QLabel("属性：", this);

    m_pDirCheckBox = new QCheckBox("目录", this);
    m_pFileCheckBox = new QCheckBox("文件", this);
    m_pSymLinkCheckBox = new QCheckBox("符号链接", this);
    m_pHiddenCheckBox = new QCheckBox("隐藏", this);
    m_pReadableCheckBox = new QCheckBox("读", this);
    m_pWriteableCheckBox = new QCheckBox("写", this);
    m_pExecuteAbleCheckBox = new QCheckBox("执行", this);

    QGridLayout *pGlayout = new QGridLayout(this);
    pGlayout->addWidget(m_pFileNameLabel, 0, 0);
    pGlayout->addWidget(m_pFileNameEdit, 0, 1);
    pGlayout->addWidget(m_pFileButton, 0 ,2);
    pGlayout->addWidget(m_pFileSizeLabel, 1,0);
    pGlayout->addWidget(m_pFileSizeEdit, 1, 1, 1, 2);
    pGlayout->addWidget(m_pFileCreateTimeLabel, 2, 0);
    pGlayout->addWidget(m_pFileCreateTimeEdit, 2, 1, 1, 2);
    pGlayout->addWidget(m_pFileLastModifiedTimeLabel, 3, 0);
    pGlayout->addWidget(m_pFileLastModifiedTimeEdit, 3, 1, 1, 2);
    pGlayout->addWidget(m_pFileLastReadTimeLabel, 4, 0);
    pGlayout->addWidget(m_pFileLastReadTimeEdit, 4, 1, 1, 2);
    pGlayout->addWidget(m_pFilePropertyLabel, 5, 0, 1, 3);

    QHBoxLayout *pHlayout = new QHBoxLayout(this);
    pHlayout->addWidget(m_pDirCheckBox);
    pHlayout->addWidget(m_pFileCheckBox);
    pHlayout->addWidget(m_pSymLinkCheckBox);
    pHlayout->addWidget(m_pHiddenCheckBox);
    pHlayout->addWidget(m_pReadableCheckBox);
    pHlayout->addWidget(m_pWriteableCheckBox);
    pHlayout->addWidget(m_pExecuteAbleCheckBox);

    pGlayout->addLayout(pHlayout, 6, 0, 1, 3);
}

MainWindow::~MainWindow()
{
}

void MainWindow::onGetFile()
{
    QString strFileName = QFileDialog::getOpenFileName(this, "选择文件", QDir::homePath(), "files(*)");
    m_pFileNameEdit->setText(strFileName);

    QFileInfo fileInfo(strFileName);

    //文件大小
    qint64 fileSize = fileInfo.size();
    m_pFileSizeEdit->setText(QString::number(fileSize));

    //文件创建时间
    QDateTime createdTime = fileInfo.birthTime();
    m_pFileCreateTimeEdit->setText(createdTime.toString("yyyy-MM-dd hh:mm:ss"));

    //文件最后修改时间
    QDateTime lastModifiedTime = fileInfo.lastModified();
    m_pFileLastModifiedTimeEdit->setText(lastModifiedTime.toString("yyyy-MM-dd hh:mm:ss"));

    //文件最后访问时间
    QDateTime lastAccessedTime = fileInfo.lastRead();
    m_pFileLastReadTimeEdit->setText(lastAccessedTime.toString("yyyy-MM-dd hh:mm:ss"));


    if (fileInfo.isDir()) {
        m_pDirCheckBox->setChecked(true);
    }

    if (fileInfo.isFile()) {
        m_pFileCheckBox->setChecked(true);
    }

    if (fileInfo.isSymLink()) {
        m_pSymLinkCheckBox->setChecked(true);
    }

    if (fileInfo.isHidden()) {
        m_pHiddenCheckBox->setChecked(true);
    }

    QFile file(strFileName);
    if (file.exists()) {
        if (file.permissions() & QFile::ReadUser) {
            m_pReadableCheckBox->setChecked(true);
        }

        if (file.permissions() & QFile::WriteUser) {
           m_pWriteableCheckBox->setChecked(true);
        }

        if (file.permissions() & QFile::ExeUser) {
            m_pExecuteAbleCheckBox->setChecked(true);
        }
    }
}