protected void downloadExcel(HSSFWorkbook workbook, HttpServletResponse response, String filename) throws IOException {
        OutputStream out = response.getOutputStream();

    response.setHeader("Content-disposition", "attachment;filename=" + URLEncoder.encode(filename, "UTF-8"));
    response.setContentType("application/msexcel;charset=UTF-8");
    workbook.write(out);
        
    out.close();        
}

------解决方案--------------------
response.getOutPutStream()，往里面写的文件的二进制流，就会在客户端弹出“另存为"文件对话框

------解决方案--------------------
探讨

response.getOutPutStream()，往里面写的文件的二进制流，就会在客户端弹出“另存为"文件对话框


------解决方案--------------------
加个按钮，点击此按钮将浏览保存的具体路径，获取路径即可