java 下载文件服务端代码

HttpServletResponse  response = this.getResponse();
response.addHeader("Content-Disposition", 
       "attachment; filename="+filneName);
          try {
         OutputStream outStream = response.getOutputStream();
         outStream.write(blobBytes);
         outStream.flush();
         outStream.close();
} catch (IOException e) {
e.printStackTrace();
}