备份程序-遍历

#include "fllemanage.h"

#include "ui_fllemanage.h"

fllemanage::fllemanage(QWidget *parent)

	: QWidget(parent)

	, ui(new Ui::fllemanage)

{

	ui->setupUi(this);

        //copy测试！！！！！！

//        QFile src("F:/src");

//        QFile dst("F:/dst");

//        bool success = true;

//        success &= src.open( QFile::ReadOnly );

//        success &= dst.open( QFile::WriteOnly | QFile::Truncate );

//        success &= dst.write( src.readAll() ) >= 0;

//       QFile::copy("F:/src/1.txt" , "F:/dst/2.txt");

//        src.close();

//        dst.close();

	//    //写文本

	//    QFile f("F:/src/1.txt");

	//    if(!f.open(QIODevice::WriteOnly | QIODevice::Text))

	//    {

	//        qDebug() << "Open failed." << endl;

	//    }

	//    QTextStream txtOutput(&f);

	//    QString s1("123");

	//    quint32 n1(123);

	//    txtOutput << s1 << endl;

	//    txtOutput << n1 << endl;

	//    f.close();

	//   //读文本

	//    QFile f("F:/src/1.txt");

	//    if(!f.open(QIODevice::ReadOnly | QIODevice::Text))

	//    {

	//        qDebug() << "Open failed." << endl;

	//    }

	//    QTextStream txtInput(&f);

	//    QString lineStr;

	//    while(!txtInput.atEnd())

	//    {

	//        lineStr = txtInput.readLine();

	//        qDebug() << lineStr << endl;

	//    }

	//    f.close();

}

fllemanage::~fllemanage()

{

	delete ui;

}

void fllemanage::on_pushButton_clicked()

{

	//    int count = 0;

	//    QString dirpath = "C:/Users/00/Desktop/git clone/OpenCV-Python-Tutorial/.idea";

	//    //设置要遍历的目录

	//    QDir dir(dirpath);

	//    qDebug()<<dirpath<<endl;

	//    //设置文件过滤器

	//    QStringList nameFilters;

	//    //设置文件过滤格式

	//    nameFilters << "*.xml";

	//    dir.setNameFilters(nameFilters);

	//    qDebug()<<dir.entryList()<<endl;

	//    qDebug()<<dir.entryInfoList()<<endl;

	//    //将过滤后的文件名称存入到files列表中

	//    QStringList files = dir.entryList(nameFilters, QDir::Files|QDir::Readable, QDir::Name);

	//    for(int i = 0; i<files.size(); i++)

	//    {

	//        qDebug()<<"now, it's output from QStringlist"<<endl;

	//        qDebug()<<files[i]<<endl;

	//    }

    //QStringList list = findALLfiles("C:/Users/00/Desktop/vsrun/123");

    //QStringList list = findALLfiles("C:/Users/00/Desktop/vsrun");

    QStringList list = findALLfiles("C:/Users/00/Desktop/git clone");

                                                                        //for(int i = 0 ; i <list.size(); i++)

	  //qDebug() <<list[i]<<endl;

	QStringList purposelist;

    purposelist = list.filter(".jpg");

	int count = 0;

	for (int i = 0; i < purposelist.size(); i++)

	{

		qDebug() << purposelist[i] << endl;

		count++;

	}

	qDebug() << "the max file has " << list.size() << endl;

	qDebug() << "the purpose file has " << count << endl;

	//新建文件夹（目标文件保存的位置）

//     QDir dir("C:/Users/00/Desktop/vsrun");

//     if(!dir.exists("copy to here")){

//         dir.mkdir("copy to here");

//     }

    QString toDir = "C:/Users/00/Desktop/123";

	//toDir.replace("\","/");

	QDir dir(toDir);

	if (!dir.exists(toDir)) {

		dir.mkdir(toDir);

	}

	QFile destFile(toDir);

	bool success = true;

	success &= destFile.open(QFile::WriteOnly | QFile::Truncate);

	for (int i = 0; i < purposelist.size(); i++)

    {

        std::string pur = purposelist[i].toStdString();//都转换为string

       // qDebug()<<pur<<endl;

        std::string sdir = toDir.toStdString();

        int pos = pur.find_last_of('/'); //找到最后/

        std::string s(pur.substr(pos+1));

        sdir.append("/");

        sdir.append(s);

        QString qsdir = QString(QString::fromLocal8Bit(sdir.c_str()));

        qDebug()<<qsdir<<endl;

        if (QFile::copy(purposelist[i], qsdir)) {  //将文件复制到新的文件路径下

            {

                if(QFile::copy(purposelist[i],toDir))

                 qDebug() << QStringLiteral("复制成功");

			}

		}

	}

}

//迭代器遍历所有文件并返回

QStringList fllemanage::findALLfiles(const QString &dir_path) {

	QStringList get_files;

	QDir dir(dir_path);

	if (!dir.exists())

	{

		qDebug() << "it is not true dir_path";

	}

	/*设置过滤参数，QDir::NoDotAndDotDot表示不会去遍历上层目录*/

	QDirIterator dir_iterator(dir_path, QDir::Files | QDir::Dirs | QDir::NoDotAndDotDot, QDirIterator::Subdirectories);

	while (dir_iterator.hasNext())

	{

		dir_iterator.next();

		QFileInfo file_info = dir_iterator.fileInfo();

		QString files = file_info.absoluteFilePath();

		get_files.append(files);

	}

	return get_files;

}