SpringBoot 下載static目錄下的靜態(tài)文件

• 后端

@PostMapping("/download/file")
public void downloadTemplate(HttpServletResponse response, 
           @RequestParam("name") String fileName) throws IOException {
       String path = "/static/files/"+fileName;
       downloadFile(response, path, fileName);
}

private void downloadFile(HttpServletResponse response, String path, String fileName) throws IOException {
       /** 將文件名稱進行編碼 */
       response.setHeader("content-disposition", "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));
       response.setContentType("content-type:octet-stream");
       /** 讀取服務器端模板文件 */
       InputStream inputStream = this.getClass().getResourceAsStream(path);

       /** 將流中內容寫出去 */
       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();
   }

• 前端

var downloadFile = function (fileName){
        let url = "/download/file";
        var params = new URLSearchParams();
        params.append("name", fileName);
        axios.post(url, params,
            {responseType: 'blob'}  //這個不能少,讓response二進制形式,如果你按照網上教程不設置這個將返回值進行BLOB([])進行處理可能會出現解析錯誤
        ).then(response => {
            const href = URL.createObjectURL(response.data);
            const a = document.createElement('a');
            a.setAttribute('href', href);
            a.setAttribute('download', fileName);
            a.click();
            URL.revokeObjectURL(href);
        });
    }

代碼源于網絡幻件，整理一下，有問題可留言绰沥。