java提交浏览器下载excel

public void excel(HttpServletResponse response) throws IOException {
        HSSFWorkbook workbook = new HSSFWorkbook();
        HSSFSheet sheet = workbook.createSheet("法人");//定义一个表名
        HSSFRow row=null;
        for(int i=0;i<5;i++){
             row = sheet.createRow(i);//定义第一行
            row.createCell(0).setCellValue("序号");//列标题
            row.createCell(1).setCellValue("账号");
            row.createCell(2).setCellValue("");
            row.createCell(3).setCellValue("起期");
            row.createCell(4).setCellValue("止期");
            row.createCell(5).setCellValue("");
            row.createCell(6).setCellValue("部门");
            }
        OutputStream outStream = response.getOutputStream();
        response.reset();
        response.setContentType("application/vnd.ms-excel;charset=GBK");
        response.setHeader("Content-Disposition",
                new String("attachment;filename=工作簿.xls".getBytes("GBK"),
                        "ISO8859-1"));

        try {
            workbook.write(outStream);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            outStream.close();
        }
        }