springMVC使用multipartFile上传文件出错：MultipartHttpServletRequest: is a MultipartResolver configured?

17-Apr-2016 22:36:27.171 SEVERE [http-apr-8080-exec-4] org.apache.catalina.core.StandardWrapperValve.invoke Servlet.service() for servlet [dispatcher] in context with path [] threw exception [Request processing failed; nested exception is java.lang.IllegalArgumentException: 17-Apr-2016 22:36:27.171 SEVERE [http-apr-8080-