springboot本地下载

傷城~ 2023-02-24 11:28 8阅读 0赞

将需要下载的资源放在resiurcs/static/中,然后下载下来

前端代码,使用thymeleaf模板为例index.html放在resources/templates中

<!DOCTYPE html>
    <html xmlns:th="http://www.thymeleaf.org">
    <head>
      <meta charset="UTF-8">
      <meta name="viewport" content="width=device-width, initial-scale=1.0">
      <meta http-equiv="X-UA-Compatible" content="ie=edge">
      <title>Document</title>
      <script src="https://cdn.bootcss.com/jquery/1.12.4/jquery.min.js"></script>
    </head>
    
    <body>
    <input type="button" onclick="down()" value="点击">
    </body>
    <script type="text/javascript">
      function down(){
        var url = window.encodeURI(this.axios.defaults.baseURL + '/ev/CommodityMaster/downloadTemp?fileName=D1120物资总清单导入模板.xlsx&token=' + localStorage.getItem("set_token"))
        window.location.href = url
        window.open("http://localhost:10000/download", '_blank')
        // window.location.href = 'http://localhost:10000/download'
      }
    </script>

后台代码

/**
         * 下载Excel模板
         */
        @ApiOperation(value = "下载物资总清单导入模板", notes = "下载物资总清单导入模板", httpMethod = "POST")
        @RequestMapping(value = "/downloadTemp", produces= MediaType.APPLICATION_OCTET_STREAM_VALUE)
        public void  downloadTemp(@RequestParam("fileName")String fileName,HttpServletRequest request, HttpServletResponse response) {
            //定义文件名
    //        String fileName = "D1120物资总清单导入模板.xlsx";
            try {
                //获取资源文件
                ClassPathResource classPathResource = new ClassPathResource("static/"+fileName);
                //设置响应类型
                response.setCharacterEncoding("UTF-8");
                String type = new MimetypesFileTypeMap().getContentType(fileName);
                response.setHeader("content-Type", type);
                if(Objects.equals(getBrowser(request), "FF")){//如果是火狐,解决火狐中文名乱码问题
                    response.setHeader("Content-Disposition",
                            "attachment;fileName=" +new String(fileName.getBytes("UTF-8"),"iso-8859-1"));
                }else{
                    response.setHeader("Content-Disposition",
                            "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));
                }
    
                //获取资源文件输入流和httpServletResponse的输出流
                try (InputStream inputStream =classPathResource.getInputStream(); ServletOutputStream servletOutputStream = response.getOutputStream()) {
                    //把资源文件的二进制流数据copy到response的输出流中
                    IOUtils.copy(inputStream, servletOutputStream);
                    //清除flush所有的缓冲区中已设置的响应信息至客户端
                    response.flushBuffer();
                } catch (Exception e) {
                    //错误日志记录
                    log.error(e.getMessage());
                }
            } catch (Exception e) {
                //自定义业务异常
                throw new ProjectException("导出模板失败");
            }
    
        }
    
        // 判断浏览器种类的方法
        private String getBrowser(HttpServletRequest request) {
            String UserAgent = request.getHeader("USER-AGENT").toLowerCase();
            if (UserAgent.contains("msie"))
                return "IE";
            if (UserAgent.contains("firefox"))
                return "FF";
            if (UserAgent.contains("safari"))
                return "SF";
            return null;
        }