android 数据的压缩和解压缩

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.util.zip.GZIPInputStream;
import java.util.zip.GZIPOutputStream;

public class ZipUtil
{
    public static byte[] compress(String source)
    {
        byte result[] = null;
        try
        {
            ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
            GZIPOutputStream gZIPPOutputStream = new GZIPOutputStream(byteArrayOutputStream);
            gZIPPOutputStream.write(source.getBytes("UTF-8"));
            gZIPPOutputStream.close();
            result = byteArrayOutputStream.toByteArray();
        }
        catch (Exception e)
        {
            // TODO: handle exception
        }
        return result;
    }

    public static String decompress(byte[] resource)
    {
        String result="";
        try
        {

            ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
            ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(resource);
            GZIPInputStream gZIPInputStream = new GZIPInputStream(byteArrayInputStream);
            byte[] buffer = new byte[256];
            int n;
            while ((n = gZIPInputStream.read(buffer)) >= 0)
            {
                byteArrayOutputStream.write(buffer, 0, n);
            }
            result =byteArrayOutputStream.toString(UTF-8); 
        }
        catch (Exception e)
        {
            // TODO: handle exception
        }
        // toString()使用平台默认编码，也可以显式的指定如toString("GBK")
        return result;
    }
}