gzip压缩

String data="aaaaaaaaaaaaaaaaaa";

byte[] b = data.getBytes();

ByteArrayOutputStream out = new ByteArrayOutputStream();  //带缓存的字节输出流

GZIPOutputStream gout = new GZIPOutputStream(out);

gour.write(b);

b = out.toByteArray();

response.setHeader("Content-Encoding", "gzip");                //通知客户端数据的压缩编码

response.setHeader("Content-Length", b.length+"");

response.getOutputStream().wwrite(b);

原文：http://www.cnblogs.com/tuifeideyouran/p/4367766.html