java - Spring MVC - 使用 Ajax 上传多部分文件(无法解析多部分 servlet 请求)

Question

我正在尝试使用 Ajax、Spring MVC 3.2.0、Tomcat 8.0.9 上传一个多部分文件，但无法正常工作。我在 stackoverflow 上阅读了很多博客和类似的帖子(Spring upload file problems、MultipartConfig with Servlet 3.0 on Spring MVC、...)，它们似乎有类似的原因，但无法弄清楚如何解决。奇怪的是，当文件小于 1MB 时上传工作正常，但是当录制的视频超过该大小时，会引发以下错误:

org.springframework.web.multipart.MultipartException: Could not parse multipart servlet request; nested exception is org.apache.commons.fileupload.FileUploadBase$IOFileUploadException: Processing of multipart/form-data request failed. null
org.springframework.web.multipart.commons.CommonsMultipartResolver.parseRequest(CommonsMultipartResolver.java:163)
org.springframework.web.multipart.commons.CommonsMultipartResolver.resolveMultipart(CommonsMultipartResolver.java:139)
org.springframework.web.multipart.support.MultipartFilter.doFilterInternal(MultipartFilter.java:110)

在下面你可以看到我所做的所有配置:

1. AJAX POST 请求:

   var videoBlob = e.data;
   var pathArray = window.location.pathname.split( '/' );
   var userID;
   
   for (i = 0; i < pathArray.length; i++) {
       if (pathArray[i].toString() == "edit"){
           userID = pathArray[i+1];
       }
   }
   
   var fd = new FormData();
   fd.append('fname', 'video');
   fd.append('data', videoBlob);
   
   $.ajax({
       url: '/user/edit/uploadVideo/' + userID,
       data: fd,
       processData: false,
       contentType: false,
       type: 'POST',
       success: function(data)
       {
           $('#result').html(data + "uploaded by FormData!");
       }
   });
   

2. web.xml

   <context-param>
       <param-name>contextConfigLocation</param-name>
       <param-value>classpath*:root-context.xml</param-value>
   </context-param>
   
   <context-param>
       <param-name>spring.profiles.default</param-name>
       <param-value>common</param-value>
   </context-param>
   
   <listener>
       <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
   </listener>
   
   <servlet>
       <servlet-name>appServlet</servlet-name>
       <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
       <init-param>
           <param-name>contextConfigLocation</param-name>
           <param-value>classpath*:servlet-context.xml</param-value>
       </init-param>
       <load-on-startup>1</load-on-startup>
   </servlet>
   
   <servlet-mapping>
       <servlet-name>appServlet</servlet-name>
       <url-pattern>/</url-pattern>
   </servlet-mapping>
   
   <filter>
       <display-name>springMultipartFilter</display-name>
       <filter-name>springMultipartFilter</filter-name>
       <filter-class>org.springframework.web.multipart.support.MultipartFilter</filter-class>
   </filter>
   
   <filter-mapping>
       <filter-name>springMultipartFilter</filter-name>
       <url-pattern>/*</url-pattern>
   </filter-mapping>
   

3. servlet-context.xml

   <mvc:annotation-driven />
   <mvc:resources mapping="/**" location="/resources/" />
   
   <context:component-scan base-package="de.talentwuerfel"/>
   
   <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
   <property name="prefix" value="/WEB-INF/pages/" />
   <property name="suffix" value=".jsp" />
   </bean>
   
   <bean id="myDataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
   <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
   <property name="url" value="jdbc:mysql://localhost:3306/schema"/>
   <property name="username" value="root"/>
   <property name="password" value=""/>
   <property name="validationQuery" value="SELECT 1"/>
   </bean>
   
   <bean id="mySessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
   <property name="dataSource" ref="myDataSource"/>
   <property name="packagesToScan">
       <array>
           <value>de.talentwuerfel</value>
       </array>
   </property>
   <property name="hibernateProperties">
       <props>
           <prop key="hibernate.hbm2ddl.auto">update</prop>
           <prop key="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</prop>
           <prop key="hibernate.show_sql">true</prop>
       </props>
   </property>
   </bean>
   
   <bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
   <property name="sessionFactory" ref="mySessionFactory"/>
   </bean>
   
   <bean id="persistenceExceptionTranslationPostProcessor"
     class="org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor"/>
   
   <tx:annotation-driven transaction-manager="transactionManager"/>
   

4. 我定义 MultipartResolver 的 root-context.xml

   <bean id="filterMultipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
       <property name="maxUploadSize"   value="100000000"/>
       <property name="maxInMemorySize" value="4096"/>
   </bean>
   

5. Java Controller

   @RequestMapping(value = "/edit/uploadVideo/{id}", method = RequestMethod.POST)
   public @ResponseBody String uploadVideo(@PathVariable long id, MultipartHttpServletRequest request, HttpServletResponse response) throws IOException {
         //.... file handling
   }
   

我该如何解决这个问题？

编辑:

我尝试了建议的方法并使用 Servlet 实现来管理我的视频文件上传。已进行以下调整，但仍会导致类似的错误:

1. 调整@Controller:

   @RequestMapping(value = "/edit/uploadVideo/{id}", method = RequestMethod.POST)
   public String uploadVideo(@PathVariable long id, @RequestParam("data") Part file) {
   
   //...
   }
   

2. root-controller 已删除，我将 multipartResolver 添加到 servlet-context.xml

   <bean id="multipartResolver" class="org.springframework.web.multipart.support.StandardServletMultipartResolver">
   </bean>
   

3. web.xml 中的标签已通过以下 Multipart-Configuration 扩展:

   <servlet>
       <servlet-name>appServlet</servlet-name>
       <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
       <init-param>
           <param-name>contextConfigLocation</param-name>
           <param-value>classpath*:servlet-context.xml</param-value>
       </init-param>
       <load-on-startup>1</load-on-startup>
       <multipart-config>
           <location>/tmp</location>
           <max-file-size>20848820</max-file-size>
           <max-request-size>418018841</max-request-size>
           <file-size-threshold>1048576</file-size-threshold>
       </multipart-config>
   </servlet>
   

但是，我仍然遇到异常，无法上传大于 1MB 的 blob 文件:

Could not parse multipart servlet request; nested exception is java.io.IOException: org.apache.tomcat.util.http.fileupload.FileUploadBase$IOFileUploadException: Processing of multipart/form-data request failed. null
    org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:927)
    org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:822)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:644)
    org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:796)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:725) 

我实现了一个类似的文件上传，其中只选择了一个文件，并且在使用相同配置的情况下发送大文件完全有效。所以我相信它与 Ajax POST 或附加的 blob 文件有相当大的关系？!

Answer 1

您可以在您的应用程序中将此添加到 Activity 的 Servlet3.0 MultiParsing:

 @Bean
    public MultipartConfigElement multipartConfigElement() {
        MultiPartConfigFactory factory = new MultiPartConfigFactory();
        factory.setMaxFileSize("128KB");
        factory.setMaxRequestSize("128KB");
        return factory.createMultipartConfig();
    }

或者用 XML 做。