How to config "CommonsMultipartResolver" in spring4 without xml to upload file

Question

I use xml config spring4 is work well.like this：

<bean id="multipartResolver"     class="org.springframework.web.multipart.commons.CommonsMultipartResolver"     p:defaultEncoding="utf-8" >     <!-- one of the properties available; the maximum file size in bytes -->       <!-- <property name="maxUploadSize" value="40000000" /> -->   </bean> 

when I config spring4 without xml.like this:

@Configuration @ComponentScan({ "common.user", "service" }) @EnableWebMvc public class SpringMVCConfig {  @Bean public ViewResolver createInternalResourceViewResolver() {     InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();     viewResolver.setViewClass(JstlView.class);     viewResolver.setContentType("text/html");     viewResolver.setPrefix("/view/");     //viewResolver.setSuffix(".jsp");     return viewResolver; }  @Bean public DefaultServletHttpRequestHandler createDefaultServletHttpRequestHandler() {     return new DefaultServletHttpRequestHandler(); }   @Bean public CommonsMultipartResolver createMultipartResolver() {     CommonsMultipartResolver resolver=new CommonsMultipartResolver();     resolver.setDefaultEncoding("utf-8");     return resolver; } 

}

It throws an exception:

 九月 30, 2014 6:01:08 下午 org.apache.catalina.core.StandardWrapperValve invoke 严重: Servlet.service() for servlet [dispatcher] in context with path [] threw exception [Request processing failed; nested exception is java.lang.IllegalStateException: Current request is not of type [org.springframework.web.multipart.MultipartHttpServletRequest]: org.apache.catalina.connector.RequestFacade@5ebfad8d] with root cause java.lang.IllegalStateException: Current request is not of type [org.springframework.web.multipart.MultipartHttpServletRequest]: org.apache.catalina.connector.RequestFacade@5ebfad8d     at org.springframework.web.servlet.mvc.method.annotation.ServletRequestMethodArgumentResolver.resolveArgument(ServletRequestMethodArgumentResolver.java:97)     at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:79)     at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:157)     at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:124)     at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)     at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:781)     at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:721)     at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:83)     at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:943)     at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:877)     at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:961)     at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:863)     at javax.servlet.http.HttpServlet.service(HttpServlet.java:646)     at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:837)     at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)     at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)     at common.servlet.RootFilter.doFilter(RootFilter.java:71)     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)     at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)     at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)     at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1070)     at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611)     at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)     at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)     at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)     at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)     at java.lang.Thread.run(Unknown Source) 

Answer 1

From MultipartResolver Javadoc : To define an implementation, create a bean with the id "multipartResolver" in a DispatcherServlet's application context.

In your xml configuration, the bean has the correct id of multipartResolver, but not in your current java configuration. You should write :

@Bean public CommonsMultipartResolver multipartResolver() {     CommonsMultipartResolver resolver=new CommonsMultipartResolver();     resolver.setDefaultEncoding("utf-8");     return resolver; } 

or

@Bean(name = "multipartResolver") public CommonsMultipartResolver createMultipartResolver() {     CommonsMultipartResolver resolver=new CommonsMultipartResolver();     resolver.setDefaultEncoding("utf-8");     return resolver; }