Spring MVC multipartfile upload file Error Resolution

Org.springframework.beans.BeanInstantiationException:Could not instantiate Bean class [    Org.springframework.web.multipart.MultipartFile]: Specified class is an interface    Org.springframework.beans.BeanUtils.instantiateClass (beanutils.java:101) Org.springframework.web.bind.annotation.support.HandlerMethodInvoker.resolveModelAttribute (    handlermethodinvoker.java:762) Org.springframework.web.bind.annotation.support.HandlerMethodInvoker.resolveHandlerArguments (    handlermethodinvoker.java:356) Org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod (    handlermethodinvoker.java:171) Org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod (    annotationmethodhandleradapter.java:426) Org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle ( annotationmethodhandleradapter.java:414) Org.springframework.web.servlet.DispatcherServlet.doDispatch ( dispatcherservlet.java:790) Org.springfraMework.web.servlet.DispatcherServlet.doService (dispatcherservlet.java:719)    Org.springframework.web.servlet.FrameworkServlet.processRequest (frameworkservlet.java:644)    Org.springframework.web.servlet.FrameworkServlet.doPost (frameworkservlet.java:560) Javax.servlet.http.HttpServlet.service (httpservlet.java:646) Javax.servlet.http.HttpServlet.service (    httpservlet.java:727) Org.apache.tomcat.websocket.server.WsFilter.doFilter (wsfilter.java:52)    Org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal (characterencodingfilter.java:88)    Org.springframework.web.filter.OncePerRequestFilter.doFilter (onceperrequestfilter.java:76) Org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal ( opensessioninviewfilter.java:198) Org.springframework.web.filter.OncePerRequestFilter.doFilter ( onceperrequestfilter.java:76)

After 2 hours, and finally went to Baidu to see the great God said this error in the controller's multipartfile parameters before adding @requestparam can solve

Spring MVC multipartfile upload file Error Resolution