springboot 应用中静态资源下载

一. 场景介绍

• Excel模板静态资源在,应用中的static文件夹中,文件名称包含中文;
• 需求:页面直接访问下载Excel模板.

二.目录结构

　　

三.后台代码

　　 @GetMapping("/downloadTemplateForUserTest")
    @ResponseBody
    public void downloadLocal(HttpServletResponse response) throws Exception {
        /** 获取静态文件的路径 .*/
        String path = ResourceUtils.getURL("classpath:").getPath() + "static/js/CRM_客户_导入模板.xlsx";

        /** 获取文件的名称 . */
        String fileName = path.substring(path.lastIndexOf("/") +1);
        File file = new File(path);
        if (!file.exists()){
            logger.error("路径有误，文件不存在！");
        }

        /** 将文件名称进行编码 */
        response.setHeader("content-disposition","attachment;filename=" + URLEncoder.encode(fileName,"UTF-8"));
        response.setContentType("content-type:octet-stream");
        BufferedInputStream inputStream = new BufferedInputStream(new FileInputStream(file));
        OutputStream outputStream = response.getOutputStream();
        byte[] buffer = new byte[1024];
        int len;
        while ((len = inputStream.read(buffer)) != -1){ /** 将流中内容写出去 .*/
            outputStream.write(buffer ,0 , len);
        }
        inputStream.close();
        outputStream.close();
    }

---

2019-04-19  16:49:19 -- 1.0v

二.在服务器端使用上述方法的时候,文件路径找不到

错误:CUsershzcuixiaoqing.m2 epositorycom eteaseqacloudqa fit .1.0nfit-0.1.0.jar!cmdline_config_CPU.txt,服务器中获取静态文件时出现!号

分析定位原因:读取路径出现了"!",在网上找了很多的资料

@GetMapping("/downloadTemplateForUser")
    @ResponseBody
    public void downloadTemplateForUser(HttpServletResponse response) throws Exception {
        String path = "/static/excel/导入到课程顾问模板.xlsx" ;
        String fileName = path.substring(path.lastIndexOf("/") + 1);
        downExcelTemplate(response, path, fileName);
        return;

    }

    private void downExcelTemplate(HttpServletResponse response, String path, String fileName) throws IOException {
        /** 将文件名称进行编码 */
        response.setHeader("content-disposition", "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));
        response.setContentType("content-type:octet-stream");
        /** 读取服务器端模板文件*/
        InputStream inputStream = DownloadFileController.class.getResourceAsStream(path);

        /** 将流中内容写出去 .*/
        OutputStream outputStream = response.getOutputStream();
        byte[] buffer = new byte[1024];
        int len;
        while ((len = inputStream.read(buffer)) != -1) {
            outputStream.write(buffer, 0, len);
        }
        inputStream.close();
        outputStream.close();
    }

使用上述的方法,可以解决服务器端的路径问题.

2019-05-06  --v1.1