springMVC4--文件上传CommonsMultipartFile

springMVC4--文件上传CommonsMultipartFile

----------------------------------文件下载-----------------------------------------------------------

//dto
		public 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   
			
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			}

//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
			@Override
				public List<MailFileUploadDto> upload(CommonsMultipartFile file,
						MailFileUploadDto vo) throws Exception {
					// TODO Auto-generated method stub
					TimeContext<?> 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_id
						m_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_id
					a_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 attachments
			public 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;
			}