QT获取文件信息（QFileInfo类的使用）

程序

.h
#ifndef FILEINFO_H
#define FILEINFO_H

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

class FileInfo : public QDialog
{
    Q_OBJECT

public:
    FileInfo(QWidget *parent =0 ,Qt::WindowFlags f=0);
    ~FileInfo();
public slots:
    void slotFile();
    void slotGet();
private:
    QLabel *fileNameLabel;
    QLineEdit *fileNameLineEdit;
    QPushButton *fileBtn;
    QLabel *sizeLabel;
    QLineEdit *sizeLineEdit;
    QLabel *createTimeLabel;
    QLineEdit *createTimeLineEdit;
    QLabel *lastModifiedLabel;
    QLineEdit *lastModifiedLineEdit;
    QLabel *lastReadLabel;
    QLineEdit *lastReadLineEdit;
    QLabel *propertyLabel;
    QCheckBox *isDirCheckBox;
    QCheckBox *isFileCheckBox;
    QCheckBox *isSymLinkCheckBox;
    QCheckBox *isHiddenCheckBox;
    QCheckBox *isReadableCheckBox;
    QCheckBox *isWritableCheckBox;
    QCheckBox *isExecutableCheckBox;
    QPushButton *getBtn;
};

#endif // FILEINFO_H

.cpp
#include "fileinfo.h"
#include <QHBoxLayout>
#include <QVBoxLayout>
#include <QFileDialog>
#include <QDateTime>

FileInfo::FileInfo(QWidget *parent,Qt::WindowFlags f)
    : QDialog(parent)
{
    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("读"));
    isWritableCheckBox = new QCheckBox(tr("写"));
    isExecutableCheckBox = new QCheckBox(tr("执行"));
    getBtn = new QPushButton(tr("获得文件信息"));
    QGridLayout *gridLayout = new QGridLayout;
    gridLayout->addWidget(fileNameLabel,0,0);
    gridLayout->addWidget(fileNameLineEdit,0,1);
    gridLayout->addWidget(fileBtn,0,2);
    gridLayout->addWidget(sizeLabel,1,0);
    gridLayout->addWidget(sizeLineEdit,1,1,1,2);
    gridLayout->addWidget(createTimeLabel,2,0);
    gridLayout->addWidget(createTimeLineEdit,2,1,1,2);
    gridLayout->addWidget(lastModifiedLabel,3,0);
    gridLayout->addWidget(lastModifiedLineEdit,3,1,1,2);
    gridLayout->addWidget(lastReadLabel,4,0);
    gridLayout->addWidget(lastReadLineEdit,4,1,1,2);
    QHBoxLayout *layout2 = new QHBoxLayout;
    layout2->addWidget(propertyLabel);
    layout2->addStretch();
    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);
    QHBoxLayout *layout4 = new QHBoxLayout;
    layout4->addWidget(getBtn);
    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()));
}

FileInfo::~FileInfo()
{

}

void FileInfo::slotFile()
{
    QString fileName= QFileDialog::getOpenFileName(this,"打开","/","files(*)");
    fileNameLineEdit->setText(fileName);
}

void FileInfo::slotGet()
{
    QString file=fileNameLineEdit->text();
    QFileInfo info(file);
    qint64 size=info.size();
    QDateTime created=info.created();
    QDateTime lastModified=info.lastModified();
    QDateTime lastRead =info.lastRead();
    /* 判断QFileInfo对象的文件类型属性 */
        bool isDir = info.isDir();		//是否为目录
        bool isFile = info.isFile();	//是否为文件
        bool isSymLink = info.isSymLink();		//判断QFileInfo对象是否为符号连接
        bool isHidden = info.isHidden();		//判断QFileInfo对象的隐藏属性
        bool isReadable = info.isReadable();	//判断QFileInfo对象的读属性
        bool isWritable = info.isWritable();	//判断QFileInfo对象的写属性
        bool isExecutable = info.isExecutable();//判断QFileInfo对象的可执行属性
        /* 根据上面得到的结果更新界面显示 */
        sizeLineEdit->setText(QString::number(size));
        createTimeLineEdit->setText(created.toString());
        lastModifiedLineEdit->setText(lastModified.toString());
        lastReadLineEdit->setText(lastRead.toString());
        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);

}

效果展示