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)