Qt 文件拷贝带进度条显示

来源：互联网发布：2017淘宝评价计分规则编辑：程序博客网时间：2024/06/05 10:37

1、拷贝中

2、拷贝结束

3、拷贝线程源码，拷贝做了过滤，只复制源文件夹下的 .jpg、.avi文件

#ifndef COPYTHREAD_H

#define COPYTHREAD_H

#include <QThread>

#include <QStringList>

enum{

    COPY_START=0,

    COPY_STOP,

    COPY_FILE_NAME,

    COPY_TOTAL_RATE,

    COPY_SINGLE_RATE,

    COPY_ERROR_MEM_FULL

}COPY_STATION;

enum{

    SUCCESS=0,

    ERROR_SRC_PATH_NULL,

    ERROR_DES_PATH_NULL,

    ERROR_NO_FILES,

    ERROR_MEM_FULL

}RETURN_VALUE;

class CopyThread : public QThread

    Q_OBJECT

public:

    CopyThread();

    void run();

    int copyStart();

    void copyStop();

    void setSrcDirPath(QString path) { srcPath=path; }

    void setDesDirPath(QString path) { desPath=path; }

private:

    QStringList fileList;

    QString srcPath;

    QString desPath;

    bool bStop;

    unsigned long fileTotalSize;

    unsigned long curSize;

    int fileCopy(QString fileName);

signals:

    void copyStationSig(int flag,QString qsText);

};

#endif // COPYTHREAD_H

.cpp

#include "copythread.h"

#include <QDebug>

#include <QFileInfo>

#include <QDir>

CopyThread::CopyThread()

int CopyThread::copyStart()

    // loading filelist

    QString fileType;

    QString fileName;

    QDir fileDir;

    QFileInfoList fileInfoList;

    QFileInfo fileInfo;

    int i=0;

    // check path

    fileInfo.setFile(srcPath);

    if(!fileInfo.isDir()) return ERROR_SRC_PATH_NULL;

    fileInfo.setFile(desPath);

    if(!fileInfo.isDir()) return ERROR_DES_PATH_NULL;

    fileList.clear();

    fileTotalSize=0;

    curSize=0;

    fileDir.setPath(srcPath);

    fileDir.setFilter(QDir::Files);             // 只选择文件其他的过滤掉

    fileInfoList = fileDir.entryInfoList();     // 获取文件信息列表

do{

        fileInfo = fileInfoList.at(i);

        fileType = fileInfo.fileName().split(".").last();

        if(fileType=="jpg" || fileType=="avi")   // jpg、avi

            fileTotalSize+=fileInfo.size()/1024;

            fileName=srcPath+"/"+fileInfo.fileName();

            fileList<<fileName;

        else

            fileInfoList.removeOne(fileInfo);

            continue;

        i++;

    }while(i<fileInfoList.size());

    if(0==fileList.count()) return ERROR_NO_FILES;

    bStop=false;

    emit copyStationSig(COPY_START,NULL);

    this->start();

    emit copyStationSig(COPY_STOP,NULL);

    return SUCCESS;

void CopyThread::copyStop()

    bStop=true;

void CopyThread::run()

    int i;

    QString fileName;

    for(i=0;i<fileList.count();++i)

        fileName = fileList.at(i);

        emit copyStationSig(COPY_FILE_NAME,fileName.split("/").last());

        if(ERROR_MEM_FULL==fileCopy(fileName))

            bStop=true;

            emit copyStationSig(COPY_ERROR_MEM_FULL,NULL);

            this->exit();

            return;

        if(bStop) break;

    emit copyStationSig(COPY_STOP,fileName);

int CopyThread::fileCopy(QString fileName)

    QFileInfo fileInfo;

    QString desFileName;

    QByteArray byteArray;

    unsigned long fileSize;

    QString qsStaText;

    unsigned long count=0;

    unsigned long freeSpace= 5*1024*1024;

    desFileName=desPath + "/" + fileName.split("/").last();

    fileInfo.setFile(fileName);

    fileSize=fileInfo.size()/1024;

    if(fileSize>freeSpace) return ERROR_MEM_FULL;

    fileInfo.setFile(desFileName);

    if(fileInfo.isFile())                       // 存在则删除

        qDebug()<<desFileName<<" 该文件已存在！";

        QFile::remove(desFileName);

    // 创建目标文件

    QFile desFile(desFileName);

    desFile.open(QIODevice::WriteOnly);

    // 打开原文件

    QFile srcFile(fileName);

    srcFile.open(QIODevice::ReadOnly);

    while(!srcFile.atEnd())

        count++;

        byteArray=srcFile.read(1024);

        desFile.write(byteArray);

        qsStaText = QString::number(100*count/fileSize);

        emit copyStationSig(COPY_SINGLE_RATE,qsStaText);

        qsStaText = QString::number(100*(curSize+count)/fileTotalSize);

        emit copyStationSig(COPY_TOTAL_RATE,qsStaText);

        if(bStop)

            desFile.close();

            srcFile.close();

            QFile::remove(desFileName);

            return SUCCESS;

    desFile.close();

    srcFile.close();

    curSize+=fileSize;

    return SUCCESS;

4、工程链接：http://download.csdn.net/detail/qq_18854309/9829694

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