springMvc 文件上传

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xml配置如下：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
   xmlns:context="http://www.springframework.org/schema/context"
   xsi:schemaLocation="http://www.springframework.org/schema/beans
      http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
      http://www.springframework.org/schema/context
      http://www.springframework.org/schema/context/spring-context-3.0.xsd">
   
   <bean id="multipartResolver"
       class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
       
       <property name="maxUploadSize" value="3145728" />
       <property name="defaultEncoding" value="UTF-8"></property>
   </bean>
</beans>

java代码如下：

/*****

   * 修改用户头像将文件上传请求映射到该方法
   *
   * @param request
   * @param 用户id
   * @param mFile
   *            上传文件
   * @return
   */
   @RequestMapping(value = "/modPTT/0", method = RequestMethod.POST)
   @ResponseBody
   public Object handleFormUpload(
           @RequestHeader("saikeMobileHead") Map<String, String> headMap,
           @RequestParam("userId") Integer id,// 设置请求参数的名称和类型
           @RequestParam("uploadfile") CommonsMultipartFile mFile) { // 请求参数一定要与form中的参数名对应
       logger.info("saikeMobileHead:" + JSON.toJSONString(headMap));
       logger.info("/modPTT/0");
       logger.info("request:" + id + ":" + JSON.toJSONString(mFile));
       if (mFile.isEmpty()) {
           return ErrorInfoUtil.setErrorInfo(
                   ErrorCodeConsField.ERROR_MSG_10001, propertiesUtil
                           .getMessage(ErrorCodeConsField.ERROR_MSG_10001)); // "redirect:uploadFailure";返回失败视图
       }
       // String url=mFile.getFileItem().getName();
       // String path = "/opt/apache-tomcat-7.0.47/bartackserver/";

       String imgurl = id + "_" + DateUtil.getNowDate() + ".jpg";
       String pttUrl = propertiesUtil.getMessage(ConsField.IMAGE_UPLOAD_URL)
               + imgurl;// "/PTT/"+
       // MD5Util.getMD5(new
       // Date().getTime()+"")+
       // ".jpg";//设置存储路径
       try {
           File file = new File(pttUrl);
           if (!file.exists()) {
               file.getParentFile().mkdirs();
               file.createNewFile();
           }
           mFile.getFileItem().write(file); // 将上传的文件写入新建的文件中

       } catch (Exception e) {
           logger.error("头像文件上传出错" + e.getMessage());
           e.printStackTrace();
           return ErrorInfoUtil.setErrorInfo(
                   ErrorCodeConsField.ERROR_MSG_10002, propertiesUtil
                           .getMessage(ErrorCodeConsField.ERROR_MSG_10002));
       }

       logger.info("头像文件写入成功");
       User user = new User();
       user.setId(Integer.valueOf(id));
       // + mFile.getFileItem().getName();// 设置读图片路径
       // propertiesUtil.getMessage("image.load.url")
       user.setPttUrl(imgurl);
       boolean flag = this.userDAO.updatePtt(user);
       if (flag) {
           return ResultInfoUtil.setSuccessInfo(propertiesUtil
                   .getMessage("image.http.url")
                   + propertiesUtil.getMessage("image.load.url") + imgurl);// "redirect:uploadSuccess"返回成功信息
       }
       logger.error("头像写入错误:" + id);
       return ErrorInfoUtil.setErrorInfo(ErrorCodeConsField.ERROR_MSG_10002,
               propertiesUtil.getMessage(ErrorCodeConsField.ERROR_MSG_10002));

   }

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