前端传来url地址与文件名，下载文件到浏览器
代码 (这里模拟，直接在代码里写了url,可以拼接在url后进行截取)请求接口 @GetMapping("/findOperatorBarVO2") @ApiOperation(value = "下载") public void findOperatorCharBar2(HttpServletResponse response)throws IOException{ toDownload(response); } 下载方法 public static void toDownload( HttpServletResponse response) { ServletOutputStream out = null; InputStream inputStream = null; try { //路径 String path = "http://10.202.61.66:11111/KEDFSFile/M00/00/1E/Cso9Ql7Z61CAZtQcAAAGqKgzHds335.txt"; // 取得文件的后缀名。 String ext = path.substring(path.lastIndexOf(".") + 1).toLowerCase(); //文件名 String pdfName = "问题."+ext; // 获取外部文件流 URL url = new URL(path); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); conn.setConnectTimeout(3 * 1000); //防止屏蔽程序抓取而返回403错误 conn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)"); inputStream = conn.getInputStream(); /** * 输出文件到浏览器 */ int len = 0; // 输出 下载的响应头，如果下载的文件是中文名，文件名需要经过url编码 response.setContentType("application/x-download"); response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(pdfName, "UTF-8")); response.setHeader("Cache-Control", "no-cache"); out = response.getOutputStream(); byte[] buffer = new byte[1024]; while ((len = inputStream.read(buffer)) > 0) { out.write(buffer, 0, len); } out.flush(); } catch (Exception e) { e.printStackTrace(); } finally { if (inputStream != null) { try { inputStream.close(); } catch (Exception e) { } } if (out != null) { try { out.close(); } catch (Exception e) { } } } } 前端代码 window.location.href = "http://localhost:9090/xx/evaOperator/findOperatorBarVO2";