ZipInputStream zis = new ZipInputStream(inputStream);
ZipEntry ze;
long totalBytesRead = 0;
while ((ze = zis.getNextEntry()) != null) {
    BufferedOutputStream outStream = new BufferedOutputStream(new FileOutputStream(ze.getName()));
    byte[] buffer = new byte[4096];
    int i;
    while ((i = zis.read(buffer)) != -1) {
    	totalBytesRead+=i;
    	outStream.write(buffer,0,i);
    }
    outStream.close();
}
inputStream.close();

import java.io.FilterInputStream;
import java.io.IOException;
import java.io.InputStream;

/**
 *
 */

/**
 * @author clint
 *
 */
public class ByteCountingInputStream extends FilterInputStream {

  public int totalRead = 0;

  /**
   * @param in
   */
  protected ByteCountingInputStream(InputStream in) {
    super(in);
    // TODO Auto-generated constructor stub
  }

  /* (non-Javadoc)
   * @see java.io.FilterInputStream#read()
   */
  @Override
  public int read() throws IOException {
    int ret = super.read();
    totalRead++;
    return ret;
  }

  /* (non-Javadoc)
   * @see java.io.FilterInputStream#read(byte[], int, int)
   */
  @Override
  public int read(byte[] b, int off, int len) throws IOException {
    int ret = super.read(b, off, len);
    totalRead += ret;
    return ret;
  }

  /* (non-Javadoc)
   * @see java.io.FilterInputStream#read(byte[])
   */
  @Override
  public int read(byte[] b) throws IOException {
    int ret = super.read(b);
    totalRead += ret;
    return ret;
  }

  /* (non-Javadoc)
   * @see java.io.FilterInputStream#skip(long)
   */
  @Override
  public long skip(long n) throws IOException {
    //What to do?
    return super.skip(n);
  }

  /**
   * @return the totalRead
   */
  protected int getTotalRead() {
    return this.totalRead;
  }

}

ZipInputStream zis = new ZipInputStream(new ByteCountingInputStream(inputStream));

import java.io.FilterInputStream;
import java.io.IOException;
import java.io.InputStream;

public class CountingInputStream extends FilterInputStream {

    private long totalBytes = 0;

    protected CountingInputStream(InputStream in) {
    	super(in);
    }

    public int getTotalBytesRead() {
    	return totalBytes;
    }

    @Override
    public int read() throws IOException {
    	int byteValue = super.read();
    	if (byteValue != -1) totalBytes++;
    	return byteValue;
    }

    @Override
    public int read(byte[] b) throws IOException {
    	int bytesRead = super.read(b);
    	if (bytesRead != -1) totalBytes+=bytesRead;
    	return bytesRead;
    }

    @Override
    public int read(byte[] b, int off, int len) throws IOException {
    	int bytesRead = super.read(b,off,len);
    	if (bytesRead != -1) totalBytes+=bytesRead;
    	return bytesRead;
    }
}