qCompress/qUncompress

Qter

Qt中提供了qCompress/qUncompress来进行文件的压缩与解压，但存在两个问题：

• 无法很好地压缩/解压缩文件夹。
• 只能将一个文件压缩为某种格式，压缩后的文件无法通过其它解压工具打开（如：7zip，或WinRAR），只能通过qUncompress解压读取，也就是说qCompress生成的压缩文件不包含普通压缩文件的一些头信息，导致无法解压。
  

Qter

1. void MainWindow::zipUnZip()
   
2. {
   
3.     //zipping
   
4.    Zip("/home/qt/comm_record.txt","/home/qt/demo.dor");
   
5.    qDebug() << "Done zipping";
   
6. 
   
7.    //unzipping
   
8.    Unzip("/home/qt/demo.dor","/home/qt/demo_unzipped.txt");
   
9.    qDebug() << "Done unzipping";
   
10. }
    
11. 
    
12. 
    
13. void Zip (QString filename , QString zipfilename){
    
14. 
    
15.     QFile infile(filename);
    
16.     QFile outfile(zipfilename);
    
17.     infile.open(QIODevice::ReadOnly);
    
18.     outfile.open(QIODevice::WriteOnly);
    
19.     QByteArray uncompressedData = infile.readAll();
    
20.     QByteArray compressedData = qCompress(uncompressedData,9);
    
21.     outfile.write(compressedData);
    
22.     infile.close();
    
23.     outfile.close();
    
24. }
    
25. 
    
26. void Unzip (QString zipfilename , QString filename){
    
27.     QFile infile(zipfilename);
    
28.     QFile outfile(filename);
    
29.     infile.open(QIODevice::ReadOnly);
    
30.     outfile.open(QIODevice::WriteOnly);
    
31.     QByteArray uncompressedData = infile.readAll();
    
32.     QByteArray compressedData = qUncompress(uncompressedData);
    
33.     outfile.write(compressedData);
    
34.     infile.close();
    
35.     outfile.close();
    
36. }
    
37. 
    
38. #include <QtCore/QFile>
    
39. #include <QByteArray>
    
40. #include <QBitArray>

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