Qt学习之路之获取文件信息 「爱情、让人受尽委屈。」 2022-08-06 08:27 241阅读 0赞 **QFileInfo类提供了对文件进行操作时获取的文件信息，包括文件名， 文件大小(字节)， 文件创建时间，** **文件最后修改时间，文件最近访问时间以及一些文件是否为目录，文件，或者符号连接，和读写等属性。** **不废话了，先看看代码~~~~** **fileInfo\_widget.h** #ifndef FILEWIDGET_H #define FILEWIDGET_H #include <QWidget> #include <QLabel> #include <QTextCodec> //---j解决中文乱码 #include <QPushButton> #include <QCheckBox> #include <QLineEdit> #include <QHBoxLayout> #include <QVBoxLayout> #include <QFileDialog> #include <QGridLayout> #include <QDateTime> class FileInfoWidget : public QWidget { Q_OBJECT public: FileInfoWidget(QWidget *parent=0); public slots: void slotFile(); //-----通过标准文件对话框获取文件名功能 void slotGetInfo(); //-----获取文件的具体信息 private: QLabel *fileNameLabel; QLineEdit *fileNameEdit; QPushButton *openFileBtn; QPushButton *GetFileInfoBtn; QLabel *sizeLabel; //---大小 QLineEdit *sizeLabelEdit; QLabel *buildTimeLabel; //--创建时间 QLineEdit *buildTimeEdit; QLabel *lastModifiedTimeLabel; //---最近修改时间 QLineEdit *lastModifiedEdit; QLabel *lastVisitLabel; //--最后访问时间 QLineEdit *lastVisitEidt; QLabel *propertyLabel; //--属性 QCheckBox *isDirCheckBox; //--目录 QCheckBox *isFileCheckBox; //--文件 QCheckBox *isSymbolLinkCheckBox; //--符号连接 QCheckBox *isHiddenCheckBox; //--隐藏 QCheckBox *isReadableCheckBox; //--读 QCheckBox *isWriteableCheckBox; //--写 QCheckBox *isExecutableCheckBox; //-执行 }; #endif //FILEWIDGET_H **fileInfo\_widget.cpp** #include "fileInfo_widget.h" FileInfoWidget::FileInfoWidget(QWidget *parent/*=0*/):QWidget(parent) { //----Qt5解决中文乱码 QTextCodec *codec = QTextCodec::codecForName("GB18030"); //----------------------------------- fileNameLabel = new QLabel(codec->toUnicode("文件名")); fileNameEdit = new QLineEdit(); openFileBtn = new QPushButton(codec->toUnicode("文件")); sizeLabel = new QLabel(codec->toUnicode("大小")); sizeLabelEdit = new QLineEdit(); buildTimeLabel = new QLabel(codec->toUnicode("创建时间")); buildTimeEdit = new QLineEdit(); lastModifiedTimeLabel = new QLabel(codec->toUnicode("最后修改时间")); lastModifiedEdit = new QLineEdit(); lastVisitLabel = new QLabel(codec->toUnicode("最近访问时间")); lastVisitEidt = new QLineEdit(); propertyLabel = new QLabel(codec->toUnicode("属性")); isDirCheckBox = new QCheckBox(codec->toUnicode("目录")); isFileCheckBox = new QCheckBox(codec->toUnicode("文件")); isSymbolLinkCheckBox = new QCheckBox(codec->toUnicode("符号连接")); isHiddenCheckBox = new QCheckBox(codec->toUnicode("隐藏")); isReadableCheckBox = new QCheckBox(codec->toUnicode("读")); isWriteableCheckBox = new QCheckBox(codec->toUnicode("写")); isExecutableCheckBox = new QCheckBox(codec->toUnicode("执行")); GetFileInfoBtn = new QPushButton(codec->toUnicode("获取文件信息")); //------布局控件 QGridLayout *gridLayout = new QGridLayout(); gridLayout->addWidget(fileNameLabel, 0, 0); gridLayout->addWidget(fileNameEdit, 0, 1); gridLayout->addWidget(openFileBtn, 0, 2); gridLayout->addWidget(sizeLabel, 1, 0); gridLayout->addWidget(sizeLabelEdit, 1, 1, 1, 2); gridLayout->addWidget(buildTimeLabel, 2, 0); gridLayout->addWidget(buildTimeEdit, 2, 1, 1, 2); gridLayout->addWidget(lastVisitLabel, 3, 0); gridLayout->addWidget(lastVisitEidt, 3, 1, 1, 2); gridLayout->addWidget(lastVisitLabel, 4, 0); gridLayout->addWidget(lastVisitEidt, 4, 1, 1, 2); QHBoxLayout *hLayout1 = new QHBoxLayout(); hLayout1->addWidget(propertyLabel); hLayout1->addStretch(); QHBoxLayout *hLayout2 = new QHBoxLayout(); hLayout2->addWidget(isDirCheckBox); hLayout2->addWidget(isFileCheckBox); hLayout2->addWidget(isHiddenCheckBox); hLayout2->addWidget(isSymbolLinkCheckBox); hLayout2->addWidget(isReadableCheckBox); hLayout2->addWidget(isWriteableCheckBox); hLayout2->addWidget(isExecutableCheckBox); QHBoxLayout *hLayout3 = new QHBoxLayout(); hLayout3->addWidget(GetFileInfoBtn); QVBoxLayout *vLayout = new QVBoxLayout(this); vLayout->addLayout(gridLayout); vLayout->addLayout(hLayout1); vLayout->addLayout(hLayout2); vLayout->addLayout(hLayout3); //---显示布局 setLayout(vLayout); //-----设置信号与槽 connect(openFileBtn, SIGNAL(clicked()), this, SLOT(slotFile())); connect(GetFileInfoBtn, SIGNAL(clicked()), this, SLOT(slotGetInfo())); //----设置窗口属性 setWindowTitle(codec->toUnicode("文件信息")); } //-----通过标准文件对话框获取文件名功能 void FileInfoWidget::slotFile() { //----Qt5解决中文乱码 QTextCodec *codec = QTextCodec::codecForName("GB18030"); QString fileNameStr = QFileDialog :: getOpenFileName (this); fileNameEdit->setText(fileNameStr); } //-----获取文件的具体信息 void FileInfoWidget::slotGetInfo() { //----Qt5解决中文乱码 QTextCodec *codec = QTextCodec::codecForName("GB18030"); //---获取文件名 QString fileStr = fileNameEdit->text(); QFileInfo fileInfo(fileStr); //---获取文件大小（字节） qint64 size = fileInfo.size(); //--获取文件创建时间 QDateTime buildTime = fileInfo.created(); //--获取文件最近修改时间 QDateTime lastMdTime = fileInfo.lastModified(); //---获取文件最近访问时间 QDateTime lastVisitTime = fileInfo.lastRead(); //--获取文件相关属性 bool isDir = fileInfo.isDir(); bool isFile = fileInfo.isFile(); bool isSymLink = fileInfo.isSymLink(); bool isHide = fileInfo.isHidden(); bool isRead = fileInfo.isReadable(); bool isWrite = fileInfo.isWritable(); bool isExecu = fileInfo.isExecutable(); //--显示属性 sizeLabelEdit->setText(QString :: number(size) + codec->toUnicode(" 字节")); buildTimeEdit->setText(buildTime.toString()); lastModifiedEdit->setText(lastMdTime.toString()); lastVisitEidt->setText(lastVisitTime.toString()); isDirCheckBox->setCheckState(isDir ? Qt::Checked : Qt :: Unchecked); isFileCheckBox->setCheckState(isFile ? Qt::Checked : Qt :: Unchecked); isSymbolLinkCheckBox->setCheckState(isSymLink ? Qt::Checked : Qt :: Unchecked); isHiddenCheckBox->setCheckState(isHide ? Qt::Checked : Qt :: Unchecked); isReadableCheckBox->setCheckState(isRead ? Qt::Checked : Qt :: Unchecked); isWriteableCheckBox->setCheckState(isWrite ? Qt::Checked : Qt :: Unchecked); isExecutableCheckBox->setCheckState(isExecu ? Qt::Checked : Qt :: Unchecked); } </span></strong> **main.cpp** #pragma once #include <QtWidgets/QApplication> #include "fileInfo_widget.h" int main(int argc, char *argv[]) { QApplication a(argc, argv); FileInfoWidget win; win.show(); return a.exec(); } **运行结果：** **![Center][]** **更多关于QFileInfo类的使用，请参考assistant。** [Center]: /images/20220806/7d8051d504994b3aa1eee0b82a1f1b3a.png
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