给页面添加Excel导出功能：

public void setResponse(HttpServletResponse response, HSSFWorkbook workbook, String excelName){    try {        if (response != null) {            response.setContentType("application/vnd.ms-excel;charset=utf-8");            response.setHeader("Content-Disposition", "attachment;filename=\"" + new String((excelName + 　　　　　　　　　".xls").getBytes("gb2312"), "ISO8859-1"));            OutputStream out = response.getOutputStream();            workbook.write(out);            out.close();        }    }catch (IOException e){        e.printStackTrace();    }}