springMVC4--文件上传CommonsMultipartFile

springMVC4--文件上传CommonsMultipartFile

springMVC4--文件上传CommonsMultipartFile----------------------------------文件下载-----------------------------------------------------------//dtopublic class MailFileUploadDto {private String m_id        ;  //与tb_mail_info表的m_id对应 private String a_id        ;  //主键，操作类型1018    private String oldname     ;  //原始文件名            private String newname     ;  //新文件名              private String dir         ;  //新文件所在路径        private Date   create_time ;  //创建时间   …………………………………………………………………………………………………………………………………………………}//controller/**邮件附件上传  * @param file * @param vo * @param response * @throws Exception */@RequestMapping(value="/mailUpload")public void mailUpload(@RequestParam(name="file")CommonsMultipartFile file, MailFileUploadDto vo,HttpServletResponse response)throws Exception{if(file==null||file.getSize()==0){throw new BusinessException("UPLOAD", "无上传文件或文件大小为0");}String filename = file.getOriginalFilename();  String suffix = filename.substring(filename.lastIndexOf(".")+1);  //获取文件上传类型if( (!"doc".equals(suffix))  && (!"docx".equals(suffix)) &&  (!"xls".equals(suffix)) && (!"xlsx".equals(suffix))&&  (!"ppt".equals(suffix)) && (!"pptx".equals(suffix)) &&  (!"rar".equals(suffix)) && (!"zip".equals(suffix))&& (!"pdf".equals(suffix))&& (!"exe".equals(suffix))){throw new BusinessException("UPLOAD", "附件类型为：.doc，.docx，.xls，.xlsx，.ppt，.pptx，.pdf，.exe，.rar或者 .zip文件（要上传其他类型文件时，可压缩上传）");}boolean flag=mailService.checkFileSl(vo);if(!flag){throw new BusinessException("UPLOAD", "一次最多只能上传6个附件！");}List<MailFileUploadDto> list=mailService.upload(file,vo);response.setContentType("text/html;charset=utf-8");Writer writer = response.getWriter();writer.write("{\"success\":true,\"data\":"+JsonUtils.getJsonData(list)+"}");writer.flush();}//impl@Overridepublic List<MailFileUploadDto> upload(CommonsMultipartFile file,MailFileUploadDto vo) throws Exception {// TODO Auto-generated method stubTimeContext<?> timeContext = AccessContextManagerUtils.application().get(TimeContext.class);Date d = new Date(timeContext.getDatabaseTime());String m_id="";//Long file_size=file.getSize();if(vo.getM_id()==null || StringUtils.isBlank(vo.getM_id())){String sequence="SELECT FUNC_GENERATE_LSH('1017') FROM dual ";  //tb_mail_file表m_idm_id=jdbcTemplate.queryForObject(sequence, String.class);vo.setM_id(m_id);}String filename = file.getOriginalFilename();  String suffix = filename.substring(filename.lastIndexOf(".")+1);  //获取文件上传类型String newfilename = "Mail_"+DateUtils.formatDate(d, "yyyyMMddHHmmssSSS") + "." + suffix;String newpath = PropUtils.getProperty("mailUploadPath");String newfile = newpath + newfilename;//文件上传路径File savedir=new File(newpath);if(!savedir.exists()){savedir.mkdir();}FileInputStream fis = null;     FileOutputStream fos = null; //写文件 try {fos = new FileOutputStream(newfile); fos.write(file.getBytes()); } catch (FileNotFoundException e) {throw new BusinessException("args", "文件不存在");} catch (IOException e) {throw new BusinessException("args", "文件上传失败");} finally{if (fos != null) {            try {                     fos.close();                } catch (IOException e) {                     e.printStackTrace();                }            }            if (fis != null) {            try {                fis.close();            } catch (IOException e) {                e.printStackTrace();            }            }}String a_id = "SELECT FUNC_GENERATE_LSH('1018') FROM dual";  //tb_mail_file表a_ida_id=jdbcTemplate.queryForObject(a_id, String.class);String insert="INSERT INTO tb_mail_file (m_id, a_id, oldname, newname, dir, create_time) " +"VALUES ('"+vo.getM_id()+"', '"+a_id+"','"+filename+"','"+newfilename+"','"+newfile+"',sysdate)";jdbcTemplate.update(insert);return findMailUploadFile(vo);}----------------------------------下载文件-----------------------------------------------------------//control/** * 下载文件 * @param @return    设定文件  * @return RecordView    返回类型  * @throws  */@RequestMapping(value="/downloadMailFile") //Download mail attachmentspublic ResponseEntity<byte[]> downloadMailFile(MailFileUploadDto vo,HttpSession session) throws IOException{if(vo.getA_id()==null||"".equals(vo.getA_id())){throw new BusinessException("lsh", "参数错误");}MailFileUploadDto dto = mailService.downloadMA(vo);byte [] body = null;ServletContext servletContext = session.getServletContext();String newFileName = PropUtils.getProperty("mailUploadPath")+dto.getNewname();InputStream in = new FileInputStream(newFileName);body = new byte[in.available()];in.read(body);HttpHeaders headers = new HttpHeaders();headers.add("Content-Disposition", "attachment;filename="+java.net.URLEncoder.encode(dto.getOldname(),"UTF-8"));HttpStatus statusCode = HttpStatus.OK;ResponseEntity<byte[]> response = new ResponseEntity<byte[]>(body, headers, statusCode);return response;}