QT-监测文件内容重复工具)

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一、演示效果

二、核心代码

#include "widget.h"
#include "ui_widget.h"
#include <QDir>
#include <QFile>
#include <QCryptographicHash>
#include <QApplication>
#include <QDebug>
#include <QFileDialog>
#include <QMessageBox>
#include <QCloseEvent>Widget::Widget(QWidget *parent): QWidget(parent), ui(new Ui::Widget)
{ui->setupUi(this);thread.start();md5.moveToThread(&thread);//跨線程傳遞自定義類型/模板時，要使用下列方法先注冊，否則會報錯qRegisterMetaType<QHash<QByteArray,QStringList>>("QHash<QByteArray,QStringList>");/** 按下按鈕->發送&Widget::checkDumplate( 信號 )* &Widget::checkDumplate( 信號 )與&FileMd5::checkDumplate( 槽 )相連接* &FileMd5::checkDumplate( 槽 )發送 &FileMd5::gotDumplate( 信號 )* &FileMd5::gotDumplate( 信號 )與&Widget::onGotDumplate( 槽 )相連接* 最後：&Widget::onGotDumplate( 槽 )將重複文件的hash添加到listWidget中*/connect(this,&Widget::checkDumplate,&md5,&FileMd5::checkDumplate);connect(&md5,&FileMd5::gotDumplate,this,&Widget::onGotDumplate);connect(&md5,&FileMd5::process,this,&Widget::onProcess);}Widget::~Widget()
{//關閉線程thread.exit();thread.wait();delete ui;
}void Widget::closeEvent(QCloseEvent *event)
{if(!isDone){QMessageBox::warning(this,"警告","文件加載中，請物關閉窗口");//忽略這個事件，當前窗口不會關閉event->ignore();}else{//接收這個事件，當前窗口會關閉event->accept();}}void Widget::on_pushButton_clicked()
{ui->progressBar->setValue(0);ui->listWidget->clear();//判斷是否有文件正在加載if(!isDone){QMessageBox::warning(this,"警告","年輕人別太心急，我跑不動了");return;}isDone = false;//選擇目錄QString path = QFileDialog::getExistingDirectory(this,"Choose Dir",".");ui->lineEdit->setText(path);emit checkDumplate(path);
}void Widget::onGotDumplate(const QHash<QByteArray, QStringList> &dumplates)
{this->dumplates = dumplates;for(QHash<QByteArray,QStringList>::const_iterator it = dumplates.begin(); it != dumplates.end(); it++){if(it.value().count()>1){ui->listWidget->addItem(it.key());}}if(ui->listWidget->count()==0){ui->listWidget->addItem("沒有重複的文件");}}void Widget::onProcess(int current, int total)
{ui->progressBar->setValue(current);ui->progressBar->setMaximum(total);if(current == total){isDone = true;}
}void Widget::on_listWidget_currentTextChanged(const QString &currentText)
{ui->listWidget_2->clear();QStringList fileList = this->dumplates[currentText.toLocal8Bit()];ui->listWidget_2->addItems(fileList);
}

#include "FileMd5.h"
#include <QFileInfo>
#include <QDir>
#include <QCryptographicHash>
#include <QApplication>
#include <QDebug>FileMd5::FileMd5(QObject *parent) : QObject(parent)
{}void FileMd5::checkDumplate(const QString &path)
{//寫代碼檢測文件重複QHash<QByteArray,QStringList> ret;QStringList files = getFiles(path);for(int i = 0; i < files.count(); i++){QString fileName = files.at(i);QByteArray md5 = getFileMd5(fileName);ret[md5].append(fileName);emit process(i+1,files.count());}emit gotDumplate(ret);
}QStringList FileMd5::getFiles(const QString &path)
{QStringList ret;QDir dir(path);//.表示當前目錄，..表示上一級目錄//entryInfoList：返回目錄中所有文件和目錄的QFileInfo對象列表QFileInfoList infoList = dir.entryInfoList(QDir::Files | QDir::Dirs | QDir::NoDotAndDotDot);for(int i=0; i < infoList.count(); i++){QFileInfo info = infoList.at(i);if(info.isDir()){QString subDir = info.absoluteFilePath();QStringList files = getFiles(subDir);ret.append(files);}else{QString fileName = info.absoluteFilePath();ret.append(fileName);}}return ret;
}QByteArray FileMd5::getFileMd5(const QString &fileName)
{QFile file(fileName);if(!file.open(QIODevice::ReadOnly)){return QByteArray();}QCryptographicHash hash(QCryptographicHash::Md5);while(!file.atEnd()){QByteArray content = file.read(100 * 1024 * 1024); //一次讀取100MB的內容hash.addData(content); //將content的數據添加到密碼散列qApp->processEvents(); //防止整個程序卡住(作用不大)}QByteArray md5 = hash.result().toHex(); //獲取最終的哈希值file.close();return md5;
}

三、下载链接

https://download.csdn.net/download/u013083044/89654075