前端controller写法

@RequestMapping(value = "/excel/export")public void exportExcel(HttpServletResponse response) {    try {        String filename ="统计";        OutputStream os = response.getOutputStream();// 取得输出流        response.reset();// 清空输出流        response.setCharacterEncoding("utf-8");        // 取得文件名。        response.setContentType("application/x-msdownload");        response.setHeader("Content-Disposition", "attachment;filename= "+new String(filename.getBytes("gb2312"),"iso8859-1")+".xls");        WritableWorkbook book = Workbook.createWorkbook(os);        // 生成名为“第一页”的工作表，参数0表示这是第一页        WritableSheet sheet = null;        Service.creteEcxel(sheet,book);        book.write();        book.close();    } catch (Exception e) {        e.printStackTrace();    }}