QT 文件复制，移动(剪切)操作_qt剪切文件到指定路径-CSDN博客 

如何移动一个文件？ 

    QString old_name=QString("D:\\c++\\c++优秀源码学习.txt");QString new_name=QString("D:\\c++优秀源码学习.txt");bool x= QFile::rename(old_name,new_name); //A路径移动到B路径qDebug()<<x;//true

    QString old_name=QString("D:\\c++\\c++优秀源码学习.txt");QString new_name=QString("D:\\123456\\c++优秀源码学习.txt");bool x= QFile::rename(old_name,new_name); //A路径移动到B路径qDebug()<<x;//false:因为没有D:\\123456这个目录。需要先创建该目录。

如何移动文件夹（包含里面的全部内容）：

#include "widget.h"
#include <QApplication>
#include <QFile>
#include <QDebug>
#include <QDir>
#include <unistd.h>
QString old_path;
QString new_path;
void create_Multilevel_folder(char* path)
{int len = strlen(path);int _len = 0;for (int i = 0; i < len; ++i){if (path[i] == '/') {_len++;}}int* a = new int[_len];memset(a, 0, sizeof(a));for (int i = 0, b = 0; i < len; ++i){if (path[i] == '/') {a[b] = i;b++;}}for (int i = 0; i < _len; i++){char p[4096];strcpy(p, path);p[a[i]] = '\0';if (access(p, 0) == -1) {qDebug()<<"不存在，创建一个";mkdir(p);}}
}void print_Files(QString path)
{QDir dir(path);dir.setFilter(QDir::Files | QDir::NoDotAndDotDot);QStringList list = dir.entryList();for (int i = 0; i < list.count(); ++i){QString path1 = path + "/" + list[i];qDebug() <<"Old_Files:"<< path1;//替换QString path2=path1.right(path1.length()-old_path.length());QString path3=new_path+path2;qDebug()<<path3;qDebug()<<"New_Files:"<<QFile::rename(path1,path3);}
}
void print_files_and_dirs(QString path)
{QDir dir(path);dir.setFilter(QDir::Dirs | QDir::NoDotAndDotDot);QStringList list = dir.entryList();for (int i = 0; i < list.count(); ++i){QString path1 = path + "/" + list[i];qDebug() <<"old_Dir:"<< path1;QString path2=path1.right(path1.length()-old_path.length());QString path3=new_path+path2+"/";qDebug()<<"new_Dir:"<<path3;create_Multilevel_folder(path3.toLocal8Bit().data());print_files_and_dirs(path1);//前面要加上前缀}print_Files(path);
}int main(int argc, char *argv[])
{QApplication a(argc, argv);old_path="D:/Qt/zip";new_path="D:/Qt/aaa";QString str=new_path+"/";create_Multilevel_folder(str.toLocal8Bit().data());print_files_and_dirs(old_path);return a.exec();
}

如何删除文件夹：

Qt拷贝文件、文件夹、创建文件夹、删除文件夹操作_qtmakedir文件夹-CSDN博客

    QString str="D:/Qt/a";QDir dir(str);if(!dir.exists()){qDebug()<<"not exists";}qDebug()<<dir.rmpath(dir.absolutePath());

当文件夹为空时，删除成功。

当文件夹不为空时，删除失败。

删除文件夹（递归）（文件夹中必须只有文件夹）

bool del_folder(QString str)
{QDir dir(str);if(!dir.exists()){qDebug()<<"not exists";}return dir.rmpath(dir.absolutePath());
}void del_folders(QString path)
{QDir dir(path);dir.setFilter(QDir::Dirs | QDir::NoDotAndDotDot);QStringList list = dir.entryList();//qDebug()<<"count:"<<list.count();//qDebug()<<list;for (int i = 0; i < list.count(); ++i){QString path1 = path + "/" + list[i];qDebug() <<"old_Dir:"<< path1;del_folders(path1);}if(list.count()==0){del_folder(path);}
}
int main(int argc, char *argv[])
{QApplication a(argc, argv);old_path="D:/app/f";del_folders(old_path);//好像找不到.vs文件return a.exec();
}

但经过测试：.vs文件夹是删不掉的。

因为.vs 是隐藏文件夹

需要添加：QDir::Hidden字段。

dir.setFilter(QDir::Hidden|QDir::Dirs | QDir::NoDotAndDotDot);

功能：把文件夹从A移动到B，原位置删除。

#include "widget.h"
#include <QApplication>
#include <QFile>
#include <QDebug>
#include <QDir>
#include <unistd.h>
QString old_path;
QString new_path;
void create_Multilevel_folder(char* path)
{int len = strlen(path);int _len = 0;for (int i = 0; i < len; ++i){if (path[i] == '/') {_len++;}}int* a = new int[_len];memset(a, 0, sizeof(a));for (int i = 0, b = 0; i < len; ++i){if (path[i] == '/') {a[b] = i;b++;}}for (int i = 0; i < _len; i++){char p[4096];strcpy(p, path);p[a[i]] = '\0';if (access(p, 0) == -1) {qDebug()<<"不存在，创建一个";mkdir(p);}}
}void print_Files(QString path)
{QDir dir(path);dir.setFilter(QDir::Hidden|QDir::Files | QDir::NoDotAndDotDot);QStringList list = dir.entryList();for (int i = 0; i < list.count(); ++i){QString path1 = path + "/" + list[i];qDebug() <<"Old_Files:"<< path1;//替换QString path2=path1.right(path1.length()-old_path.length());QString path3=new_path+path2;qDebug()<<path3;qDebug()<<"New_Files:"<<QFile::rename(path1,path3);}
}
void print_files_and_dirs(QString path)
{QDir dir(path);dir.setFilter(QDir::Hidden|QDir::Dirs | QDir::NoDotAndDotDot);QStringList list = dir.entryList();for (int i = 0; i < list.count(); ++i){QString path1 = path + "/" + list[i];qDebug() <<"old_Dir:"<< path1;QString path2=path1.right(path1.length()-old_path.length());QString path3=new_path+path2+"/";qDebug()<<"new_Dir:"<<path3;create_Multilevel_folder(path3.toLocal8Bit().data());print_files_and_dirs(path1);//前面要加上前缀}print_Files(path);
}
bool del_folder(QString str)
{QDir dir(str);if(!dir.exists()){qDebug()<<"not exists";}return dir.rmpath(dir.absolutePath());
}void del_folders(QString path)
{QDir dir(path);dir.setFilter(QDir::Hidden|QDir::Dirs | QDir::NoDotAndDotDot);QStringList list = dir.entryList();//qDebug()<<"count:"<<list.count();//qDebug()<<list;for (int i = 0; i < list.count(); ++i){QString path1 = path + "/" + list[i];qDebug() <<"old_Dir:"<< path1;del_folders(path1);}if(list.count()==0){del_folder(path);}
}int main(int argc, char *argv[])
{QApplication a(argc, argv);old_path="D:/VS/ConsoleApplication1";new_path="D:/VS/ConsoleApplication2";QString str=new_path+"/";create_Multilevel_folder(str.toLocal8Bit().data());print_files_and_dirs(old_path);del_folders(old_path);return a.exec();
}