Springmvc异步上传文件

1<script src="js/jquery.js" type="text/javascript"></script><script src="js/jquery.ext.js" type="text/javascript"></script><script src="js/jquery.form.js" type="text/javascript"></script><form action="" method="post" id="jvForm" enctype="multipart/form-data">
2        <input type="text" name="name"/>
3        <input type="file" name="pic" id="pic"/>
4        <input type="submit" value="提交"/>
5</form><script>      $(function(){          var options = {              url : "upload/uploadPic.do",              dataType : "json",              type : "post",              success : function(data){                  alert(2);              }          };          $("#pic").change(function(){              alert(1);             $("#jvForm").ajaxSubmit(options)          });      });</script

springmvc配置文件处理器：

1<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
2     <property name="maxUploadSize" value="1048576"/>
3</bean>

controller

1@Controller
2@RequestMapping(value = "/upload")
3public class UploadController {
4    
5    @RequestMapping(value = "/uploadPic.do")
6    public String uploadPic(@RequestParam(required=false) MultipartFile pic){
7        System.out.println(pic.getOriginalFilename());
8        return "success";
9    }
10    
11}