javaweb 的文件下载

• 前台代码

 1 //模板下载
 2             templatesDownload : function(){
 3                 var form = $("<form>");   //定义一个form表单
 4                 form.attr(‘style‘, ‘display:none‘);   //在form表单中添加查询参数
 5                 form.attr(‘target‘, ‘‘);
 6                 form.attr(‘method‘, ‘post‘);
 7                 form.attr(‘action‘, getPath() + ‘/ExpertLibController.json?getBatchImportTemplate=true‘);
 8                 $(‘body‘).append(form);  //将表单放置在web中
 9                 form.submit().remove();
10             },

• 后台处理

 1     /**
 2      * 模板下载
 3      */
 4     @RequestMapping(params = "getBatchImportTemplate")
 5     public void getBatchImportTemplate(HttpServletRequest request, HttpServletResponse response){
 6         response.setCharacterEncoding("UTF-8");
 7         response.setContentType("application/octet-stream");
 8         response.setHeader("Content-disposition","attachment;filename=batchExpertsTemplate.xls");
 9         try {
10             FileInputStream fis = new FileInputStream(request.getSession().getServletContext().getRealPath("/zjfxjk/expertsLib/templates/batchExpertsTemplate.xls"));
11             System.out.println("清单批量 rar 文件路径："+request.getSession().getServletContext().getRealPath("/zjfxjk/expertsLib/templates/batchExpertsTemplate.xls"));
12             IOUtils.copy(fis,response.getOutputStream());
13             fis.close();
14         } catch (Exception e) {
15             e.printStackTrace();
16         }
17     }

原文地址：https://www.cnblogs.com/zhangjieatbky/p/8176440.html