7-Zip-JBinding Java压缩开源软件

static public int getSize(File file) {
    ZipFile zf = null;
    int total = -1;

    try {
        zf = new ZipFile(file);
        total = 0;
        for (Enumeration e = zf.entries(); e.hasMoreElements();) {
            e.nextElement();
            total++;
        }
        zf.close();
    } catch (ZipException ex) {
        Logger.getLogger(Zip.class.getName()).log(Level.SEVERE, null, ex);
    } catch (IOException ex) {
        Logger.getLogger(Zip.class.getName()).log(Level.SEVERE, null, ex);
    }

    return total;
}

public int getSize (File file) {
     RandomAccessFile randomAccessFile = null;
     ISevenZipInArchive inArchive = null;
     int total = -1;
     try {
         randomAccessFile = new RandomAccessFile(file.getAbsolutePath(), "r");
         inArchive = SevenZip.openInArchive(null, // autodetect archive type
                 new RandomAccessFileInStream(randomAccessFile));

         total = inArchive.getNumberOfItems();

     } catch (Exception e) {
         System.err.println("Error occurs: " + e);
         System.exit(1);
     } finally {
         if (inArchive != null) {
             try {
                 inArchive.close();
             } catch (SevenZipException e) {
                 System.err.println("Error closing archive: " + e);
             }
         }
         if (randomAccessFile != null) {
             try {
                 randomAccessFile.close();
             } catch (IOException e) {
                 System.err.println("Error closing file: " + e);
             }
         }
     }

     return total;
 }