Spring + FTP 文件上传下载
jopen
11年前
首先说一下ftp的特点是:传输速度快,适用于上传大文件,适用于局域网络。
直奔主题,这里采用apache提供的网络包,commons-net.jar。我用的3.3。
ftp上传需要ftp服务器。这里描述客户端的实现。
spring 文件上传这一块就不做描述
直接代码(上传)
@RequestMapping(value = "/uploadConfigFile") @ResponseBody public void uploadConfigFile(@RequestParam("uploadFile") MultipartFile uploadFile){ FTPClient ftpClient = new FTPClient(); try { ftpClient.connect("120.120.120.156",21); ftpClient.login("user1", "user1"); ftpClient.enterLocalPassiveMode(); ftpClient.setFileType(FTP.BINARY_FILE_TYPE); //设置上传目录 ftpClient.changeWorkingDirectory("/GOS_CAS/RECONVERT/cas_config_reconvert"); String fileName = new String(uploadFile.getOriginalFilename().getBytes("utf-8"),"iso-8859-1"); FTPFile[] fs = ftpClient.listFiles(); if (fs!=null && fs.length>0) { for(int i=0;i<fs.length;i++){ if (fs[i].getName().equals(fileName)) { ftpClient.deleteFile(fs[i].getName()); break; } } } OutputStream os = ftpClient.appendFileStream(fileName); byte[] bytes = new byte[1024]; InputStream is = uploadFile.getInputStream(); // 开始复制 其实net已经提供了上传的函数,但是我想可能是我这个版本有点问题 //ftpClient.storeFile("", fis);
// 于是我自己write出去了,其实我想都是一样的效果,在这里告诉大家这两种方式都能实现
int c; // 暂未考虑中途终止的情况 while ((c = is.read(bytes)) != -1) { os.write(bytes, 0, c); } os.flush(); is.close(); os.close(); RestoreConfiguration restoreConfiguration = new RestoreConfiguration(); restoreConfiguration.setStrName(fileName); getServiceStub().restoreConfiguration(restoreConfiguration); } catch (IOException e) { e.printStackTrace(); } finally { try { ftpClient.disconnect(); } catch (IOException e) { e.printStackTrace(); } } }
下载
@RequestMapping(value = "/downloadConfigFile") public void downloadConfigFile(HttpServletResponse response,@RequestParam("fileName")String fileName) { response.setCharacterEncoding("UTF-8"); response.setContentType("multipart/form-data"); FTPClient ftpClient = new FTPClient(); try { int reply; ftpClient.connect("120.120.120.156",21); ftpClient.login("user1", "user1"); reply = ftpClient.getReplyCode(); if (!FTPReply.isPositiveCompletion(reply)) { ftpClient.disconnect(); return; } ftpClient.changeWorkingDirectory("/GOS_CAS/BACKUP/cas_config_backup");//转移到FTP服务器目录 FTPFile[] fs = ftpClient.listFiles(); for(int i=0;i<fs.length;i++){ if(fs[i].getName().equals(fileName)){ String saveAsFileName = new String(fs[i].getName().getBytes("UTF-8"), "ISO8859-1"); response.setHeader("Content-Disposition", "attachment;fileName="+saveAsFileName); OutputStream os = response.getOutputStream(); ftpClient.retrieveFile(fs[i].getName(), os); os.flush(); os.close(); break; } } ftpClient.logout(); } catch (IOException e) { e.printStackTrace(); } finally { if (ftpClient.isConnected()) { try { ftpClient.disconnect(); } catch (IOException ioe) { } } } }以上就简单的自己总结了一下,希望对各位有点帮助,同时不足之处希望大神斧正