java - MultipartResolver和AbstractAnnotationConfigDispatcherServletInitializer

我在将CommonsMultipartResolver bean与扩展AbstractAnnotationConfigDispatcherServletInitializer的初始化程序结合使用时遇到麻烦。

我已经在先前的项目中成功使用CommonsMultipartResolver，但是初始化程序实现了WebApplicationInitializer。

凭直觉，我在扩展AbstractAnnotationConfigDispatcherServletInitializer的初始化程序中进行了此操作。

@Override
  protected Class<?>[] getRootConfigClasses() {
    return new Class<?>[]{
        MultipartUploadConfig.class
    };
  }

  @Override
  protected Class<?>[] getServletConfigClasses() {
    return new Class<?>[]{
        WebMvcConfig.class

    };
  }

我认为这与WebApplicationInitializer中的此代码具有相同的效果(这是有效的配置)。

@Override
    public void onStartup(ServletContext servletContext) throws ServletException {
        AnnotationConfigWebApplicationContext dispatcherServlet = new AnnotationConfigWebApplicationContext();
        dispatcherServlet.register(WebMvcConfig.class);

        ServletRegistration.Dynamic dispatcher = servletContext.addServlet("dispatcher", new DispatcherServlet(dispatcherServlet));
        dispatcher.setLoadOnStartup(1);
        dispatcher.addMapping("/");

        AnnotationConfigWebApplicationContext rootContext = new AnnotationConfigWebApplicationContext();
        rootContext.register(MultipartUploadConfig.class);

        servletContext.addListener(new ContextLoaderListener(rootContext));
    }

使用AbstractAnnotationConfigDispatcherServletInitializer，出现以下错误:

Could not parse multipart servlet request; nested exception is java.lang.IllegalStateException: Unable to process parts as no multi-part configuration has been provided

因此，谁知道如何使AbstractAnnotationConfigDispatcherServletInitializer与multipartResolver bean一起使用？

其他相关信息:

WebMvcConfig.java

@Configuration
@EnableWebMvc
@ComponentScan(basePackages = ...)
public class WebMvcConfig extends WebMvcConfigurerAdapter {
  ...

  @Override
  public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
    configurer.enable();
  }

}

MultipartUploadConfig.java

@Configuration
public class MultipartUploadConfig {

  @Bean
  public CommonsMultipartResolver multipartResolver() {
    CommonsMultipartResolver multipartResolver = new CommonsMultipartResolver();
    multipartResolver.setMaxUploadSize(8192);
    multipartResolver.setDefaultEncoding("utf-8");
    return multipartResolver;
  }
}

堆栈跟踪:

[http-nio-8080-exec-4] org.apache.catalina.core.StandardWrapperValve.invoke Servlet.service() for servlet [dispatcher] in context with path [] threw exception
 org.springframework.web.multipart.MultipartException: Could not parse multipart servlet request; nested exception is java.lang.IllegalStateException: Unable to process parts as no multi-part configuration has been provided
    at org.springframework.web.multipart.support.StandardMultipartHttpServletRequest.parseRequest(StandardMultipartHttpServletRequest.java:100)
    at org.springframework.web.multipart.support.StandardMultipartHttpServletRequest.<init>(StandardMultipartHttpServletRequest.java:78)
    at org.springframework.web.multipart.support.StandardServletMultipartResolver.resolveMultipart(StandardServletMultipartResolver.java:76)
    at org.springframework.web.multipart.support.MultipartFilter.doFilterInternal(MultipartFilter.java:108)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:610)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:516)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1086)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:659)
    at org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:223)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1558)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1515)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.IllegalStateException: Unable to process parts as no multi-part configuration has been provided
    at org.apache.catalina.connector.Request.parseParts(Request.java:2669)
    at org.apache.catalina.connector.Request.getParts(Request.java:2636)
    at org.apache.catalina.connector.RequestFacade.getParts(RequestFacade.java:1083)
    at org.springframework.web.multipart.support.StandardMultipartHttpServletRequest.parseRequest(StandardMultipartHttpServletRequest.java:85)
    ... 23 more

最佳答案

得到它了。 AbstractAnnotationConfigDispatcherServletInitializer和WebApplicationInitializer版本确实确实相互对应。没问题。问题在于，在使用AbstractAnnotationConfigDispatcherServletInitializer的项目中，还存在Spring Security，这使事情搞砸了。

使用Spring Security时，多部分解析器的Bean名称应为@Bean(name = "filterMultipartResolver")。当然，这意味着应像这样在MultipartFilter中设置AbstractSecurityWebApplicationInitializer。

@Override
  protected void beforeSpringSecurityFilterChain(ServletContext servletContext) {
    insertFilters(servletContext, new MultipartFilter());
  }