QT文件查询，查询单个文件和文件夹下所有文件行数

#include "mainwindow.h" #include "ui_mainwindow.h" #include<qfiledialog.h> #include<QDebug> #include<QMessageBox> MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent) , ui(new Ui::MainWindow) { ui->setupUi(this); Init(); } MainWindow::~MainWindow() { delete ui; } void MainWindow::Init() { ui->tableWidget->setColumnCount(3); QStringList t_stringlist; t_stringlist.push_back("文件名"); t_stringlist.push_back("行数"); t_stringlist.push_back("大小"); ui->tableWidget->setHorizontalHeaderLabels(t_stringlist); //ui->tableWidget->horizontalHeader()->setStretchLastSection(true); //ui->tableWidget->horizontalHeader()->setSectionResizeMode(QHeaderView::Stretch); fswatcher.addPath("E:\\demo"); connect(&fswatcher , SIGNAL(directoryChanged(QString)) , this , SLOT(directoryChanged1(QString))); } void MainWindow::on_pushButton_clicked() { QString t_str_filepath = QFileDialog::getOpenFileName(this , "" , "/" , ""); ui->lineEdit->setText(t_str_filepath); } void MainWindow::on_pushButton_start_clicked() { ui->tableWidget->clearContents(); ui->tableWidget->setRowCount(0); QString t_filename = ui->lineEdit->text(); qDebug()<<t_filename; if(t_filename.length()==0) { QMessageBox::critical(this , "警告" , "选取的文件为空 ， 请重新选择" ); return; } //开始读取文件行数 QFile info(t_filename); qint64 t_intsize = info.size()/1024; QString t_str_size = QString::number(t_intsize); //文件大小 QTableWidgetItem *t_item1 = new QTableWidgetItem(t_filename); ui->tableWidget->setItem(0,0,t_item1); QTableWidgetItem *t_item2 = new QTableWidgetItem(t_str_size+"K"); ui->tableWidget->setItem(0,2,t_item2); QFile mfile(t_filename); QFileInfoList t_filelist; t_filelist.push_back(t_filename); GetInfo(t_filelist); } void MainWindow::on_pushButtondir_clicked() { QString t_str_dir = QFileDialog::getExistingDirectory(this); if(t_str_dir.length()==0) { QMessageBox::information(this , "警告" ,"选择文件夹为空，请重新选择"); } else { ui->lineEditdir->setText(t_str_dir); } } void MainWindow::on_pushButtondir_2_clicked() { // 清空表格并重新设置行列数 ui->tableWidget->clearContents(); ui->tableWidget->setRowCount(0); QString t_str_dirname = ui->lineEditdir->text(); if(t_str_dirname.length()==0) { QMessageBox::information(this , "警告" ,"选择文件夹为空，请重新选择"); return; } //开始遍历目标文件夹下的所有文件 QFileInfoList m_fileinfolist; GetAllfilesFromDir(t_str_dirname , m_fileinfolist); //到此获取到所有文件 //开始获取文件大小，文件行数，文件名 GetInfo(m_fileinfolist); } int MainWindow::GetFileLine(QString p_str_filename) { QFile mfile(p_str_filename); int m_count=0; if(mfile.open(QIODevice::ReadOnly)) { while(true) { char buffer[2048]={0}; int readsize = mfile.readLine(buffer , sizeof(buffer)); if(readsize!=-1) { m_count++; } else { break; } } } return m_count; } void MainWindow::GetInfo(QFileInfoList p_QFileInfoList) { int i=0; foreach(QFileInfo info , p_QFileInfoList) { ui->tableWidget->insertRow(i); int t_intsize = info.size(); int t_line = GetFileLine(info.absoluteFilePath()); QString t_str_name = info.absoluteFilePath(); QString str_line = QString::number(t_line); QString str_size = QString::number(t_line); QTableWidgetItem *t_item = new QTableWidgetItem(t_str_name); ui->tableWidget->setItem(i,0,t_item); QTableWidgetItem *t_item1 = new QTableWidgetItem(str_line); ui->tableWidget->setItem(i,1,t_item1); QTableWidgetItem *t_item2 = new QTableWidgetItem(str_size); ui->tableWidget->setItem(i,2,t_item2); i++; } } void MainWindow::GetAllfilesFromDir(QString p_str_dirname , QFileInfoList &m_fileinfolist) { QDir t_dir(p_str_dirname); if(!t_dir.exists()) { QMessageBox::information(this , "警告" ,"选择文件夹为空，请重新选择"); return; } foreach(QFileInfo info , t_dir.entryInfoList(QDir::NoDotAndDotDot | QDir::Dirs)) { GetAllfilesFromDir(info.filePath() , m_fileinfolist); } foreach(QFileInfo info , t_dir.entryInfoList(QDir::Files)) { m_fileinfolist.push_back(info); } foreach(QFileInfo info , m_fileinfolist) { qDebug()<<"---"<<info.absoluteFilePath()<<"---"<<info<<endl; } } void MainWindow:: directoryChanged1(QString p_path) { ui->textEdit->setText("文件发生改变"); ui->textEdit->append(p_path); QMessageBox::warning(this , "warning" , "监视文件发生改变"); }