1 <!-- 配置springMVC上传文件和下载文件 -->2     <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">3         <property name="defaultEncoding" value="utf-8"></property><!-- 编码格式，与jsp格式一致 -->4         <property name="maxUploadSize" value="52428880"></property><!-- 文件上传的最大限制 5mb -->5         <property name="uploadTempDir" value="upload/temp"></property><!-- 上传文件的临时路径。文件上传后，会自动消失 -->6         <property name="maxInMemorySize" value="4096"/> 7     </bean>

 1     /** 2      * SpringMVC的文件上传 3      * 【1】上传的文件，会自动被绑定到MultipartFile的对象中。该对象的api 4      *         (1)byte[] getBytes()获取文件数据 5      *         (2)String getContentType()获取文件的MIME类型，如image/pjpeg,text/plain等 6      *         (3)InputStream getInputStream()获取文件流 7      *         (4)Sring getName()获取表单中文件组件的名称 8      *         (5)String getOriginalFilename()获取上传文件的原名 9      *         (6)long getSize()获取文件的字节大小，单位为byte10      *         (7)boolean isEmpty():是否有上传的文件11      *         (8)void transferTo(File dest) 可以使用给文件将上传文件保存到一个目标目录下        12     * @Title: uploadMyPictrue 13     * @Description: TODO(这里用一句话描述这个方法的作用) 14     * @param file 为前台form表单中<input type="file" name="file"/>中的name15     * @return16     * @return String    返回类型 17     * @author 尚晓飞18     * @date 2014-10-31 下午2:01:2319      */20     @RequestMapping("/uploadMyPictrue")21     public String  uploadMyPictrue(HttpServletRequest request,@RequestParam("file") MultipartFile file){22         System.out.println("StudentController.uploadMyPictrue()");23         boolean flag=file.isEmpty();24         if(!file.isEmpty()){25             String mimesString=file.getContentType();//获取mime类型26             System.out.println("MiME:"+mimesString);//MiME:image/jpeg27             long size=file.getSize();28             System.out.println("size:"+size);//size:8906729             String nameString=file.getName();30             System.out.println("组件名称："+nameString);//组件名称：file31             String realName=file.getOriginalFilename();32             System.out.println("文件原名:"+realName);//文件原名:图片.jpg33             34             //获取项目跟目录35             String path=request.getSession().getServletContext().getRealPath("");36             //拼接上传文件的存放目录37             path=path+"/uploadfile";38             //为上传文件起一个新名字39             Integer index=realName.lastIndexOf(".");40             String suffix=realName.substring(index);41             //获取当前时间戳42             long fileNam=System.currentTimeMillis();43             String fileNames=fileNam+suffix;//新的完整文件名44             String pathString=path+"/"+fileNames;45             File file2=new File(pathString);46             47             if(!file2.exists()){48                 file2.mkdir();//不存在就创建文件49             }50             //将文件上传到项目制定的目录下51             52             try {53                 file.transferTo(file2);54             } catch (IllegalStateException e) {55                 // TODO Auto-generated catch block56                 e.printStackTrace();57             } catch (IOException e) {58                 // TODO Auto-generated catch block59                 e.printStackTrace();60             }finally{61                 62             }63             64             65         }else{66             //上传文件为空67         }68         return "/page/success";69     }

 1     /** 2      * 多文件上传 3     * @Title: moreUploadFile  4     * @Description: TODO(这里用一句话描述这个方法的作用)  5     * @param request 6     * @param response 7     * @param errors 8     * @return 9     * @return String    返回类型 10     * @author 尚晓飞11     * @date 2014-10-31 下午3:12:1612      */13     @RequestMapping("/moreUploadFile")14     public String moreUploadFile(HttpServletRequest request,HttpServletResponse response ){15         //将请求作用域转换成上传作用域16         MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request; 17         //获取封装了多个上传文件的map18         Map<String, MultipartFile> fileMap=multipartRequest.getFileMap();19         //获取项目根目录20         String rootPath=request.getSession().getServletContext().getRealPath("");21         //拼接上传目录22         rootPath=rootPath+"\\uploadfile";23         //逐个上传文件24         Set<String> set=fileMap.keySet();25         for(String name:set){26             //该name的值，为前台form表单中<input type="file" name="xxx">中的xxx27             MultipartFile file=fileMap.get(name);28             String filename=file.getOriginalFilename();29             String fileName=file.getName();//获取组件名 此处的值也是xxx的值30             File file2=new File(rootPath+"\\"+filename);31             if(file2.exists()){32                 file2.mkdir();33             }34             try {35                 file.transferTo(file2);36             } catch (IllegalStateException e) {37                 // TODO Auto-generated catch block38                 e.printStackTrace();39             } catch (IOException e) {40                 // TODO Auto-generated catch block41                 e.printStackTrace();42             }43             44         }45         46         47         48         return "/page/success";49     }

 1     /** 2      * 文件下载 3     * @Title: downLoadFile  4     * @Description: TODO(这里用一句话描述这个方法的作用)  5     * @param request 6     * @param response 7     * @return void    返回类型  8     * @author 尚晓飞 9     * @date 2014-10-31 下午3:53:1610      */11     @RequestMapping("/downLoadFile")12     public void downLoadFile(String name,HttpServletRequest request,HttpServletResponse response){13         //模拟从数据库查处文件的名14         String fileName=name;15         //拼接文件全路径16         String rootPath=request.getSession().getServletContext().getRealPath("\\uploadfile")+"\\"+name;17         //生成文件18         File file=new File(rootPath);19         long fileLength =file.length();//获取文件的大小  20         21         //输入流和输出流22         BufferedInputStream bis = null;  23         BufferedOutputStream bos = null;  24         25         26         try {27             //设置下载的参数配置28             response.setContentType("text/html;charset=utf-8");  29             request.setCharacterEncoding("UTF-8");30             response.setContentType("application/x-msdownload;");  31             String files= new String(fileName.getBytes("utf-8"), "ISO8859-1");32             response.setHeader("Content-disposition", "attachment; filename="+files);  33             response.setHeader("Content-Length", String.valueOf(fileLength));  34             35             //添加输入流36             bis=new BufferedInputStream(new FileInputStream(file));37             //添加输出流38             bos=new BufferedOutputStream(response.getOutputStream());39             byte[] buff = new byte[2048];  40             int bytesRead;  41             while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) {  42                 bos.write(buff, 0, bytesRead);  43             }      44             45         } catch (Exception e) {46             // TODO Auto-generated catch block47             e.printStackTrace();48         }finally{49             try {50                 if(bis!=null){51                     bis.close();52                 }53                 if(bos!=null){54                     bos.close();55                 }56             } catch (IOException e) {57                     // TODO Auto-generated catch block58                     e.printStackTrace();59             }60             61         }  62         63         64     }