SpringBoot+thymeleaf实现文件下载（已实践，全流程）

￡神魔★判官ぃ 2023-10-18 16:04 42阅读 0赞

## 场景 ##

在页面中点击模板，实现excel模板的下载。

## 效果 ##

![Image 1][]![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70][]

## 实现 ##

thymeleaf页面代码

在当前页面引入js文件

js中

//模板下载按钮点击事件
        $("#dowloadBtn").click(function () {
            templateDowload()
        });

在实现方法中

//EXCel模板下载
    function templateDowload(){
        window.location.href="/wmsReceiveOrder/downloadOnlineLearnMaterials";
    }

请求到后台Controller

@Description("模板下载")
        @RequestMapping("/downloadOnlineLearnMaterials")
        public String downloadFile(HttpServletRequest request, HttpServletResponse response) {
            String fileName = "template.xlsx";// 设置文件名，根据业务需要替换成要下载的文件名
            if (fileName != null) {
                //设置文件路径
                String realPath = configProperties.getExcelTemplateDpwloadPath();//这里使用配置类配置文件路径
                File file = new File(realPath , fileName);
                if (file.exists()) {
                    response.setContentType("application/force-download");// 设置强制下载不打开
                    response.addHeader("Content-Disposition", "attachment;fileName=" + fileName);// 设置文件名
                    byte[] buffer = new byte[1024];
                    FileInputStream fis = null;
                    BufferedInputStream bis = null;
                    try {
                        fis = new FileInputStream(file);
                        bis = new BufferedInputStream(fis);
                        OutputStream os = response.getOutputStream();
                        int i = bis.read(buffer);
                        while (i != -1) {
                            os.write(buffer, 0, i);
                            i = bis.read(buffer);
                        }
                        System.out.println("success");
                    } catch (Exception e) {
                        e.printStackTrace();
                    } finally {
                        if (bis != null) {
                            try {
                                bis.close();
                            } catch (IOException e) {
                                e.printStackTrace();
                            }
                        }
                        if (fis != null) {
                            try {
                                fis.close();
                            } catch (IOException e) {
                                e.printStackTrace();
                            }
                        }
                    }
                }
            }
            return null;
        }

其中String realPath = configProperties.getExcelTemplateDpwloadPath();

是使用的配置类配置文件路径，这里可以根据具体业务修改，可以改为固定路径。

具体怎样使用配置文件以及配置类实现文件上传下载路径的修改

参照：

[https://blog.csdn.net/BADAO\_LIUMANG\_QIZHI/article/details/88786320][https_blog.csdn.net_BADAO_LIUMANG_QIZHI_article_details_88786320]

比如这里的模板文件，路径为

![Image 1][]![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70 1][]

[Image 1]: 
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20190325094316474.jpg?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk=,size_16,color_FFFFFF,t_70
[https_blog.csdn.net_BADAO_LIUMANG_QIZHI_article_details_88786320]: https://blog.csdn.net/BADAO_LIUMANG_QIZHI/article/details/88786320
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20190325094403801.jpg?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk=,size_16,color_FFFFFF,t_70