前言:
而今你们对“java实现文件下载到下载盘”大概比较看重,兄弟们都想要学习一些“java实现文件下载到下载盘”的相关知识。那么小编也在网上网罗了一些关于“java实现文件下载到下载盘””的相关知识,希望小伙伴们能喜欢,姐妹们一起来学习一下吧!最近在做一个临时的项目,APP端在检测到程序有更新时,需要去后台下载新的安装包。具体过程如下:
controller层:
/** * 下载app * @param response */ @RequestMapping("downApp") @ResponseBody public void Download(HttpServletResponse response) { String fileName ="wuye.apk"; String result = FileUtil.downloadFile(response, fileName); log.info("app包下载结果:",result); }
工具类:
public class FileUtil { public static String downloadFile(HttpServletResponse response, String fileName) { File path =null; response.setHeader("content-type","application/octet-stream"); response.setContentType("application/octet-stream"); try { response.setHeader("Content-Disposition","attachment;filename=" + java.net.URLEncoder.encode(fileName,"UTF-8")); }catch (UnsupportedEncodingException e2) { e2.printStackTrace(); } byte[] buff =new byte[1024]; BufferedInputStream bis =null; OutputStream os =null; try { path =new File(ResourceUtils.getURL("classpath:").getPath()); os = response.getOutputStream(); bis =new BufferedInputStream(new FileInputStream(new File(path +"/doc/" + fileName))); int i = bis.read(buff); while (i != -1) { os.write(buff,0, buff.length); os.flush(); i = bis.read(buff); } }catch (FileNotFoundException e1) { //e1.getMessage()+"系统找不到指定的文件"; return "系统找不到指定的文件"; }catch (IOException e) { e.printStackTrace(); }finally { if (bis !=null) { try { bis.close(); }catch (IOException e) { e.printStackTrace(); } } } return "success"; }
希望大家可以支持一下哦!谢谢大家支持!需要资料的小伙伴可以私信【Java】获取哦!
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