Qt 文件搜索

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Qt 文件搜索

代码无意间在网上找到，下载回来后改了几个格式，编译后经测试可以正常使用，这个个文件搜索的很好的例子，有两种搜索方式：一种是按文件名作为关键字进行搜索，一种是以文档中所包含的关键字进行搜索，贴两张图先：

上图为两个文本文档(都位于C盘根目录下)，其中都包含有"2010-12-05"这样的关键字，一会就用这个关键字搜索看看行不行...

注意：这个实例程序无法进行递归的查找，只能搜索指定目录这一层的文件，另外它只能匹配文本文档。

 1 #ifndef WINDOW_H 2 #define WINDOW_H 3  4 #include<QDialog> 5 class QComboBox; 6 class QDir; 7 class QLabel; 8 class QPushButton; 9 class QTableWidget;10 11 class Window:public QDialog12 {13 Q_OBJECT14 public:15 Window(QWidget *parent=0);16 private slots:17     void browse();18     void find();19 private:20     QStringList findFiles(const QDir &directory,const QStringList &files,21                           const QString &text);22     void showFiles(const QDir &directory,const QStringList &files);23     QPushButton *createButton(const QString &text,const char *member);24     QComboBox *createComboBox(const QString &text = QString());25     void createFilesTable();26     QComboBox *fileComboBox;27     QComboBox *textComboBox;28     QComboBox *directoryComboBox;29     QLabel *fileLabel;30     QLabel *textLabel;31     QLabel *directoryLabel;32     QLabel *filesFoundLabel;33     QPushButton *browseButton;34     QPushButton *findButton;35     QTableWidget *filesTable;36 };37 38 #endif39

  1 #include <QtGui>  2 #include "window.h"  3 Window::Window(QWidget *parent)  4     : QDialog(parent)  5 {  6     browseButton = createButton(tr("&Browse..."),SLOT(browse()));  7     findButton = createButton(tr("&Find"),SLOT(find()));  8     fileComboBox = createComboBox(tr("*"));  9     textComboBox = createComboBox(); 10     directoryComboBox = createComboBox(QDir::currentPath()); 11     fileLabel = new QLabel(tr("Named:")); 12     textLabel = new QLabel(tr("Containing text:")); 13     directoryLabel = new QLabel(tr("In directory:")); 14     filesFoundLabel = new QLabel; 15     createFilesTable(); 16     QHBoxLayout *buttonsLayout = new QHBoxLayout; 17     buttonsLayout->addStretch(); 18     buttonsLayout->addWidget(findButton); 19     QGridLayout *mainLayout = new QGridLayout; 20     mainLayout->addWidget(fileLabel,0,0); 21     mainLayout->addWidget(fileComboBox,0,1,1,2); 22     mainLayout->addWidget(textLabel,1,0); 23     mainLayout->addWidget(textComboBox,1,1,1,2); 24     mainLayout->addWidget(directoryLabel,2,0); 25     mainLayout->addWidget(directoryComboBox,2,1); 26     mainLayout->addWidget(browseButton,2,2); 27     mainLayout->addWidget(filesTable,3,0,1,3); 28     mainLayout->addWidget(filesFoundLabel,4,0); 29     mainLayout->addLayout(buttonsLayout,5,0,1,3); 30     setLayout(mainLayout); 31     setWindowTitle(tr("Find Files")); 32     resize(700,300); 33 } 34 void Window::browse() 35 { 36     QString directory = QFileDialog::getExistingDirectory(this, 37                                QObject::tr("Find Files"),QDir::currentPath()); 38     if (!directory.isEmpty()) { 39         directoryComboBox->addItem(directory); 40         directoryComboBox->setCurrentIndex(directoryComboBox->currentIndex() + 1); 41     } 42 } 43 void Window::find() 44 { 45     filesTable->setRowCount(0); 46     QString fileName = fileComboBox->currentText(); 47     QString text = textComboBox->currentText(); 48     QString path = directoryComboBox->currentText(); 49     QDir directory = QDir(path); 50     QStringList files; 51     if (fileName.isEmpty()) fileName = "*"; 52     files = directory.entryList(QStringList(fileName), 53                                 QDir::Files | QDir::NoSymLinks); 54     if (!text.isEmpty()) 55         files = findFiles(directory,files,text); 56     showFiles(directory,files); 57 } 58 QStringList Window::findFiles(const QDir &directory,const QStringList &files, 59                               const QString &text) 60 { 61     QProgressDialog progressDialog(this); 62     progressDialog.setCancelButtonText(tr("&Cancel")); 63     progressDialog.setRange(0,files.size()); 64     progressDialog.setWindowTitle(tr("Find Files")); 65     QStringList foundFiles; 66     for (int i = 0; i < files.size(); ++i) { 67         progressDialog.setValue(i); 68         progressDialog.setLabelText(tr("Searching file number %1 of %2...") 69                                     .arg(i).arg(files.size())); 70         qApp->processEvents(); 71         if (progressDialog.wasCanceled()) break; 72         QFile file(directory.absoluteFilePath(files[i])); 73         if (file.open(QIODevice::ReadOnly)) { 74             QString line; 75             QTextStream in(&file); 76  77             while (!in.atEnd()) { 78                 if (progressDialog.wasCanceled()) break; 79                 line = in.readLine(); 80                 if (line.contains(text)) { 81                     foundFiles << files[i]; 82                     break; 83                 } 84             } 85         } 86     } 87     return foundFiles; 88 } 89 void Window::showFiles(const QDir &directory,const QStringList &files) 90 { 91     for (int i = 0; i < files.size(); ++i) { 92         QFile file(directory.absoluteFilePath(files[i])); 93         qint64 size = QFileInfo(file).size(); 94         QTableWidgetItem *fileNameItem = new QTableWidgetItem(files[i]); 95         fileNameItem->setFlags(Qt::ItemIsEnabled); 96         QTableWidgetItem *sizeItem = new QTableWidgetItem(tr("%1 KB") 97                                              .arg(int((size + 1023) / 1024))); 98         sizeItem->setTextAlignment(Qt::AlignRight | Qt::AlignVCenter); 99         sizeItem->setFlags(Qt::ItemIsEnabled);100         int row = filesTable->rowCount();101         filesTable->insertRow(row);102         filesTable->setItem(row,0,fileNameItem);103         filesTable->setItem(row,1,sizeItem);104     }105     filesFoundLabel->setText(tr("%1 file(s) found").arg(files.size()));106 }107 QPushButton *Window::createButton(const QString &text,const char *member)108 {109     QPushButton *button = new QPushButton(text);110     connect(button,SIGNAL(clicked()),this,member);111     return button;112 }113 QComboBox *Window::createComboBox(const QString &text)114 {115     QComboBox *comboBox = new QComboBox;116     comboBox->setEditable(true);117     comboBox->addItem(text);118     comboBox->setSizePolicy(QSizePolicy::Expanding,QSizePolicy::Preferred);119     return comboBox;120 }121 void Window::createFilesTable()122 {123     filesTable = new QTableWidget(0,2);124     QStringList labels;125     labels << tr("File Name") << tr("Size");126     filesTable->setHorizontalHeaderLabels(labels);127     filesTable->horizontalHeader()->setResizeMode(0,QHeaderView::Stretch);128     filesTable->verticalHeader()->hide();129     filesTable->setShowGrid(false);130 }131

 1 #include "window.h" 2 #include <QApplication> 3  4  int main(int argc,char *argv[]) 5 { 6     QApplication app(argc,argv); 7     Window window; 8     window.show(); 9     return app.exec();10 }11

转自：http://www.cnblogs.com/hicjiajia/archive/2010/12/05/1896823.html