springMVC实现文件上传

通过maven引入相关jar包

<dependency>
   <groupId>commons-fileupload</groupId>
   <artifactId>commons-fileupload</artifactId>
   <version>1.3.1</version>
</dependency>
<dependency>
   <groupId>commons-io</groupId>
   <artifactId>commons-io</artifactId>
   <version>2.4</version>
</dependency>
配置springmvc上传配置

 <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">  
       <property name="defaultEncoding" value="utf-8"></property>   
       <property name="maxUploadSize" value="10485760000"></property>  
       <property name="maxInMemorySize" value="40960"></property>  
  </bean>  

springMvc上传代码

@RequestMapping("upload"  )  
   public String upload(HttpServletRequest request,HttpServletResponse response) throws IllegalStateException, IOException {  
       //创建一个通用的多部分解析器  
       CommonsMultipartResolver multipartResolver = new CommonsMultipartResolver(request.getSession().getServletContext());  
       //判断 request 是否有文件上传,即多部分请求  
       if(multipartResolver.isMultipart(request)){  
           //转换成多部分request    
           MultipartHttpServletRequest multiRequest = (MultipartHttpServletRequest)request;  
           //取得request中的所有文件名  
           Iterator<String> iter = multiRequest.getFileNames();  
           while(iter.hasNext()){  
               //记录上传过程起始时的时间，用来计算上传时间  
               int pre = (int) System.currentTimeMillis();  
               //取得上传文件  
               MultipartFile file = multiRequest.getFile(iter.next());
               if(file != null){
                   //取得当前上传文件的文件名称
                   String myFileName = file.getOriginalFilename();  
                   //如果名称不为“”,说明该文件存在，否则说明该文件不存在  
                   if(myFileName.trim() !=""){  
                       System.out.println(myFileName);  
                       //重命名上传后的文件名
                       String fileName = "SpringMVCUpload/" + file.getOriginalFilename();  
                       //定义上传路径  
                       String path = "D:/" + fileName;  
                       File localFile = new File(path);  
                       file.transferTo(localFile);  
                   }  
               }  
               //记录上传该文件后的时间  
               int finaltime = (int) System.currentTimeMillis();  
               System.out.println(finaltime - pre);  
           }  
             
       }  
       return "forward:home/success.jsp";  
   }