实现多文件上传CommonsMultipartResolver

1、在spring配置文件中配置文件上传解析器

<!-- 文件上传解析器 -->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
    <property name="defaultEncoding" value="utf-8"></property>
    <property name="maxUploadSize" value="10485760000"></property><!-- 最大上传文件大小 -->
    <property name="maxInMemorySize" value="10960"></property>
</bean>

@Controller  
public class FileController{  
      
    @RequestMapping("/fileUpload.do")  
    public String fileUpload(HttpServletRequest request,HttpServletResponse response){  
        long startTime=System.currentTimeMillis();   //获取开始时间  
          
        CommonsMultipartResolver multipartResolver = new CommonsMultipartResolver(request.getSession().getServletContext());  
        if(multipartResolver.isMultipart(request)){ //判断request是否有文件上传  
            MultipartHttpServletRequest multiRequest = (MultipartHttpServletRequest)request;  
            Iterator<String> ite = multiRequest.getFileNames();  
            while(ite.hasNext()){  
                MultipartFile file = multiRequest.getFile(ite.next());  
                if(file!=null){  
                    File localFile = new File("D:/"+file.getOriginalFilename());  
                    try {  
                        file.transferTo(localFile); //将上传文件写到服务器上指定的文件  
                    } catch (IllegalStateException e) {  
                        e.printStackTrace();  
                    } catch (IOException e) {  
                        e.printStackTrace();  
                    }  
                }  
            }  
        }  
        long endTime=System.currentTimeMillis(); //获取结束时间  
        System.out.println("上传文件共使用时间："+(endTime-startTime));  
          
        return "success";