Java 通过url下载图片

//web端通过点击下载图片到本地图片url是服务上的访问路径前端代码a href javascript:void(0) οnclickdownloadImg(${root}/web/${url}) classc-3277de mlr-6下载/a说明${url}是图片路径如http://xxx/图片.png//下载海报function downloadImg(url) {window.location.href url;}后端代码RequestMapping(value /web/{url}) ResponseBody public void downloadImg(HttpServletResponse response, PathVariable String url) { OutputStream outputStream null; InputStream inputStream null; try { if (CommonUtil.isNotNull(url)) { logger.info(读取图片中); response.setContentType(application/force-download); response.setCharacterEncoding(utf-8); String fileNameactivityId.png; if(request.getHeader(user-agent).contains(Firefox))//判断是否为火狐 fileNamenew String(fileName.getBytes(utf-8), ISO8859-1); else fileNameURLEncoder.encode(fileName, utf-8); response.setHeader(Content-Disposition, attachment;filename\fileName\); //图片下载 URL url new URL(url); URLConnection conn url.openConnection(); outputStream response.getOutputStream(); inputStream conn.getInputStream(); IOUtils.copy(inputStream, outputStream); } } catch (Exception e) { logger.error(下载图片失败,e); }finally { IOUtils.closeQuietly(inputStream); IOUtils.closeQuietly(outputStream); } }