Qt：获取文件信息类QFileInfo用法总结

比眉伴天荒 2022-10-24 11:47 323阅读 0赞

#include "dialog.h"
    #include <QFileDialog>
    #include <QDateTime>
    Dialog::Dialog(QWidget *parent)
        : 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()));
    }
    
    Dialog::~Dialog()
    {
    
    }
    
    void Dialog::slotFile()
    {
        QString fileName = QFileDialog::getOpenFileName(this,"打开","/","files (*)");
        fileNameLineEdit->setText(fileName);
    }
    
    void Dialog::slotGet()
    {
        QString file = fileNameLineEdit->text();
        QFileInfo info(file);
    
        qint64 size = info.size();         //获取大小
        QDateTime created = info.created();//创建时间
        QDateTime lastModified = info.lastModified();//最后修改时间
        QDateTime lastRead = info.lastRead();//最后访问时间
    
        bool isDir = info.isDir();   //是否是目录
        bool isFile = info.isFile();  //是否是文件
        bool isSymLink = info.isSymLink(); //符合链接
        bool isHidden = info.isHidden();  //隐藏属性
        bool isReadable = info.isReadable(); //读属性
        bool isWritable = info.isWritable();  //写属性
        bool isExecutable = info.isExecutable(); //可执行属性
    
        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);
    }

![5400946378628d109a3a2ca1273c88f0dfc.jpg][]

\---

[5400946378628d109a3a2ca1273c88f0dfc.jpg]: /images/20221024/71cf31b7c8e74140ba9a6a5fb5670074.png