qt调用7z.exe压缩文件

qt有个quazip的库,但是倒腾过来还要编译,我是qt小白,一直没做出来.

考虑只需要windows的环境能用就行,改用QProcess和7z.exe直接按命令行操作实现一个类;

参考连接 : <<7z命令行>>https://www.jianshu.com/p/4f9be6b47161

参考连接 : <<7z 压缩命令行工具>>https://www.cnblogs.com/Frank99/p/5951177.html

参考连接 : <>https://blog.csdn.net/yuchunhai321/article/details/100089384?depth_1-utm_source=distribute.pc_relevant.none-task&utm_source=distribute.pc_relevant.none-task

分享代码仅做参考,有以下缺点:

1现在还是同步操作,压缩大文件耗时较长的,会卡UI,需要的请改线程方式;

2输入输出异常不做异常捕获,容易输入错误导致执行失败;

3数据无价,代码仅为分享和学习.不要轻易应用到你的程序中,导致数据丢失不负责.

 

7z.exe和7z.dll从7z官网安装包中获取即可,我是从安装包7z1900.exe改为7z1900.rar直接解压缩.取的文件;

虽然很多文件没带上,但是用来压缩解压好像是没问题;

7z.exe和7z.dll加入qrc资源文件这个不解释.

#ifndef ZIP7Z_H
#define ZIP7Z_H

#include 
#include 
#include 
#include 

class Zip7z : public QObject
{
    Q_OBJECT
public:
    static bool Zip(QString dest,QString src_partten,QString &out);
    static bool UnZip(QString src,QString dest,QString &out);
private:
    static bool Init(QString &out);
};

#endif // ZIP7Z_H

#include "zip7z.h"

bool Zip7z::Zip(QString dest,QString src_partten,QString &out){
    QString filestate = "";
    out = "";
    if(Init(filestate)==false){
        out = filestate + QString::fromLocal8Bit("不能执行压缩");
        return false;
    }
    else{
        QProcess p(0);
        QStringList args = QStringList();
        args.append("a");
        args.append(dest);
        args.append(src_partten);
        p.start(QApplication::applicationDirPath() + "/7z.exe",args);
        p.waitForStarted();
        p.waitForFinished();
        out = QString::fromLocal8Bit(p.readAllStandardOutput());
        return true;
    }
}
bool Zip7z::UnZip(QString src,QString dest,QString &out){
    QString filestate = "";
    out = "";
    if(Init(filestate)==false){
        out = filestate + QString::fromLocal8Bit("不能执行压缩");
        return false;
    }
    else{
        QProcess p(0);
        QStringList args = QStringList();
        args.append("x");
        args.append(src);
        args.append("-o" + dest);//-o和目标目录必须连在一起
        args.append("-aoa");//不提示,直接覆盖同名文件
        p.start(QApplication::applicationDirPath() + "/7z.exe",args);
        p.waitForStarted();
        p.waitForFinished();
        out = QString::fromLocal8Bit(p.readAllStandardOutput());
        return true;
    }
}
bool Zip7z::Init(QString &out){
    out = "";
    QStringList depends = QStringList();
    depends.append("7z.exe");
    depends.append("7z.dll");
    for(QString file : depends){
        QString loaclfile = QApplication::applicationDirPath() + "/" + file;
        if(QDir().exists(file)==false){
            //从资源释放文件到本地
            QString qrcfile = ":/7z/" + file;
            QFile::copy(qrcfile,loaclfile);
        }
    }
    out=QString::fromLocal8Bit("文件检查完成,正常.");
    return true;
}

调用:

void MainWindow::on_pushButton_4_clicked()
{
    QString out;
    bool successful = Zip7z::Zip(QApplication::applicationDirPath() + "/123.zip",
               QApplication::applicationDirPath() + "/789.txt",out);
    if(!successful){
        QApplication::beep();
    }
    qDebug() << out;
    qDebug() << "--------------------------------------------------------";
    Zip7z::UnZip(QApplication::applicationDirPath() + "/123.zip",
                   QApplication::applicationDirPath() + "/unzip",out);
    qDebug() << out;
}

输出:

7-Zip 19.00 (x86) : Copyright (c) 1999-2018 Igor Pavlov : 2019-02-21

Open archive: C:/Users/user/Desktop/qt_cpp_lib/build-cpp_lib/debug/123.zip
--
Path = C:/Users/user/Desktop/qt_cpp_lib/build-cpp_lib/debug/123.zip
Type = zip
Physical Size = 44090955

Scanning the drive:
1 file, 45059039 bytes (43 MiB)

Updating archive: C:/Users/user/Desktop/qt_cpp_lib/build-cpp_lib/debug/123.zip

Add new data to archive: 1 file, 45059039 bytes (43 MiB)


Files read from disk: 1
Archive size: 44090955 bytes (43 MiB)
Everything is Ok

--------------------------------------------------------

7-Zip 19.00 (x86) : Copyright (c) 1999-2018 Igor Pavlov : 2019-02-21

Scanning the drive for archives:
1 file, 44090955 bytes (43 MiB)

Extracting archive: C:\Users\user\Desktop\qt_cpp_lib\build-cpp_lib\debug\123.zip
--
Path = C:\Users\user\Desktop\qt_cpp_lib\build-cpp_lib\debug\123.zip
Type = zip
Physical Size = 44090955

Everything is Ok

Size:       45059039
Compressed: 44090955