使用JFileChooser加載並讀取zip文件？

Question

我開發了一個程序，我想將不同的文件保存爲zip作爲備份，然後在單擊還原按鈕時加載它們。我有下面的保存文件代碼，但如何使用JFileChooser加載此文件？我不需要將它讀入程序，只需將它解壓縮到我的應用程序所在的文件夾中即可。我將如何做到這一點？我創建zip代碼如下：

public void createZip(){ 

    byte[] buffer = new byte[1024]; 
    String[] srcFiles = {"Payments.dat", "PaymentsPosted.dat", "Receipts.dat", "ReceiptsPosted.dat", "AccountDetails.dat", "AssetsLiabilities.dat", "UnitDetails.dat"}; 
    String zipFile = "Backups.zip"; 

    try{ 

     FileOutputStream fos = new FileOutputStream(zipFile); 
     ZipOutputStream zos = new ZipOutputStream(fos); 

     for (int i=0; i < srcFiles.length; i++) { 
      File srcFile = new File(srcFiles[i]); 
      FileInputStream fis = new FileInputStream(srcFile); 

      // begin writing a new ZIP entry, positions the stream to the start of the entry data 
      zos.putNextEntry(new ZipEntry(srcFile.getName())); 

      int length; 
      while ((length = fis.read(buffer)) > 0) { 
       zos.write(buffer, 0, length); 
      } 

      zos.closeEntry(); 
      // close the InputStream 
      fis.close(); 
     } 

     // close the ZipOutputStream 
     zos.close(); 

     }catch(IOException ex){ 
      ex.printStackTrace(); 
     } 
     JOptionPane.showMessageDialog(null,"File Saved! See Backups.zip in your program folder"); 
    } 
} 

另外我想，如果有人能告訴我怎麼也包上面的方法爲JFileChooser，以節省升值？

編輯：多虧了用戶184994.這是我完成的文件輸入代碼：

public class ZipInput { 

public void loadZip() { 

    // Create a filter so that we only see .zip files 
    FileFilter filter = new FileNameExtensionFilter(null, "zip"); 


    // Create and show the file filter 
    JFileChooser fc = new JFileChooser(); 
    fc.setFileFilter(filter); 
    fc.removeChoosableFileFilter(fc.getAcceptAllFileFilter()); 
    int response = fc.showOpenDialog(null); 

    // Check the user pressed OK, and not Cancel. 
    if (response == JFileChooser.APPROVE_OPTION) { 
     File backUp = fc.getSelectedFile(); 

     byte[] buffer = new byte[1024]; 

     try { 

      //get the zip file content 
      ZipInputStream zis = new ZipInputStream(new FileInputStream(backUp)); 
      //get the zipped file list entry 
      ZipEntry ze = zis.getNextEntry(); 

      while (ze != null) { 

       String fileName = ze.getName(); 
       File newFile = new File(fileName); 

       System.out.println("file unzip : " + newFile.getAbsoluteFile()); 

       //create all non exists folders 
       //else you will hit FileNotFoundException for compressed folder 
       //new File(newFile.getParent()).mkdirs(); 
       FileOutputStream fos = new FileOutputStream(newFile); 

       int len; 
       while ((len = zis.read(buffer)) > 0) { 
        fos.write(buffer, 0, len); 
       } 

       fos.close(); 
       ze = zis.getNextEntry(); 
      } 

      zis.closeEntry(); 
      zis.close(); 

      System.out.println("Done"); 

     } catch (IOException ex) { 
      ex.printStackTrace(); 
     } 
    } 

} 

}

Answer 1

要創建JFileChooser中，代碼應該是這樣的：

public void showOpenDialog() { 

    // Create a filter so that we only see .zip files 
    FileFilter filter = new FileNameExtensionFilter(null, "zip"); 

    // Create and show the file filter 
    JFileChooser fc = new JFileChooser(); 
    fc.setFileFilter(filter); 
    int response = fc.showOpenDialog(null); 

    // Check the user pressed OK, and not Cancel. 
    if (response == JFileChooser.APPROVE_OPTION) { 
     File yourZip = fc.getSelectedFile(); 
     // Do whatever you want with the file 
     // ... 
    }   
} 

就實際解壓縮壓縮文件而言，您可以找到更多信息here。