对浏览器提供数据导出后台

// 输出Excel文件
try {
   OutputStream output = response.getOutputStream();
   response.reset();
   // 设置分区中文名
   String filename = "商品价格预警";
   // 设置响应的编码
   response.setContentType("application/x-download");// 下面三行是关键代码，处理乱码问题
   response.setCharacterEncoding("utf-8");
   // 设置浏览器响应头对应的Content-disposition
   response.setHeader("Content-disposition",
         "attachment;filename=" + new String(filename.getBytes("gbk"), "iso8859-1") + ".xls");
   workBook.write(output);
   output.close();
   workBook.close();
} catch (IOException e) {
   e.printStackTrace();
}


//poi写法