java zip浏览器导出

public void exportDmZip(HttpServletResponse response) throws Exception {
        OutputStream out = response.getOutputStream();
        String fileName = "C:\Users\xx\Desktop\2.zip";
        byte[] data = getByte(fileName);
        response.reset();
        response.addHeader("Content-Length", ""+data.length);
        response.setContentType("application/zip;charset=UTF-8");
        response.setHeader("Content-Disposition","attachment;filename="+fileName);
        IOUtils.write(data, out);
        out.flush();
        out.close(); 
    }

private byte[] getByte(String zipFileName) {
    try {
        FileInputStream fin  = new FileInputStream(zipFileName);
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        int read;
        byte[] bytes=new byte[1024];
        while((read = fin.read(bytes)) >0){
            out.write(bytes, 0, read);
        }
        fin.close();
        bytes = out.toByteArray(); 
        out.close();
        return bytes;
    } catch (IOException e) {
        e.printStackTrace();
        return null;
    }
}

此方法需要本地已生成压缩包，zipFileName为压缩包的路径