private static byte[] getUnzippedFile(ZipInputStream zin, 
                                      String fileExt) throws IOException, Exception {
    byte[] res = null;
    ZipEntry entry;
    try {    
        while ((entry = new ZipEntry(zin.getNextEntry())) != null) {
            if (entry.isDirectory()) 
                continue;            
            if (entry.getName().endsWith("." + fileExt)) {
               ByteArrayOutputStream streamBuilder = new ByteArrayOutputStream();
               int bytesRead;               
               byte[] tempBuffer = new byte[2048];
               
               try {
                    bytesRead = zin.read(tempBuffer);
                    while (bytesRead  > 0) {
                       streamBuilder.write(tempBuffer, 0, bytesRead);
                       bytesRead = zin.read(tempBuffer);
                    }                    
               }  catch (Exception ex) {
                   //System.out.println(ex.getMessage());
               }
               res = streamBuilder.toByteArray();
            }
        }
    } catch (Exception e) {
        //System.out.println(e.getMessage());        
    } finally {
        zin.close();
    }
    
    return res;
}

    public static void main(String[] args) {
        try(ZipInputStream zin = new ZipInputStream(new FileInputStream("C:\\test\\test.zip")))
        {
            ZipEntry entry;
            String name;
            long size;
            while((entry=zin.getNextEntry())!=null){                 
                name = entry.getName(); // получим название файла
                size=entry.getSize();  // получим его размер в байтах
                System.out.printf("Название: %s \t размер: %d \n", name, size);
            }
        }
        catch(Exception ex){             
            System.out.println(ex.getMessage());
        }

    }

    public static void main(String[] args) throws IOException {
        ZipFile zip = new ZipFile("C:\\test\\ttt.zip");
        Enumeration zipEntries = zip.getEntries();
        byte[] res = null;

        while (zipEntries.hasMoreElements()) {
           ZipEntry zipEntry = (ZipEntry) zipEntries.nextElement();
           System.out.println(zipEntry + "  *********************************************");           
           InputStream is = zip.getInputStream(zipEntry);
           int bytesRead;
           ByteArrayOutputStream streamBuilder = new ByteArrayOutputStream();
           byte[] tempBuffer = new byte[1024];          
           bytesRead = is.read(tempBuffer);
           while (bytesRead  > 0) {
              streamBuilder.write(tempBuffer, 0, bytesRead);
              bytesRead = is.read(tempBuffer);
           }           
           is.close();
           res = streamBuilder.toByteArray();
           streamBuilder.close();
           String st = new String(res, "Cp1251");
           System.out.println(st);           
        }
    }