spring mvc实现文件上传并携带其他参数的示例

这是主要使用到的jar 文件是：spring mvc +apache common-fileuplad

第一步：web.xml 文件。【重点是spring mvc的拦截器和相关监听器】

<?xml version="1.0" encoding="UTF-8"?> 
<web-app version="2.5"  
  xmlns="http://java.sun.com/xml/ns/javaee"  
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
  xsi:schemaLocation="http://java.sun.com/xml/ns/javaee  
  http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> 
 <display-name></display-name>  
 <!-- Spring和mybatis的配置文件 --> 
  <context-param> 
    <param-name>contextConfigLocation</param-name> 
    <param-value>classpath:spring-mybatis.xml</param-value> 
  </context-param> 
  <!-- 编码过滤器 --> 
  <filter> 
    <filter-name>encodingFilter</filter-name> 
    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>    
    <init-param> 
      <param-name>encoding</param-name> 
      <param-value>UTF-8</param-value> 
    </init-param> 
  </filter> 
  <filter-mapping> 
    <filter-name>encodingFilter</filter-name> 
    <url-pattern>/*</url-pattern> 
  </filter-mapping> 
  <!-- Spring监听器 --> 
  <listener> 
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> 
  </listener> 
  <!-- 防止Spring内存溢出监听器 --> 
  <listener> 
    <listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class> 
  </listener> 
 
  <!-- Spring MVC servlet --> 
  <servlet> 
    <servlet-name>SpringMVC</servlet-name> 
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> 
    <init-param> 
      <param-name>contextConfigLocation</param-name> 
      <param-value>classpath:spring-mvc.xml</param-value> 
    </init-param> 
    <load-on-startup>1</load-on-startup>     
  </servlet> 
  <servlet-mapping> 
    <servlet-name>SpringMVC</servlet-name> 
    <!-- 此处可以可以配置成*.do，对应struts的后缀习惯 --> 
    <url-pattern>/</url-pattern> 
  </servlet-mapping> 
  <welcome-file-list> 
    <welcome-file>/index.jsp</welcome-file> 
  </welcome-file-list> 
</web-app>

第二步：spring-mvc 配置文件【重点：spring mvc 视图模式，spring mvc 文件上传限定参数，spring mvc 资源拦截管理和其他】

<?xml version="1.0" encoding="UTF-8"?> 
<beans xmlns="http://www.springframework.org/schema/beans" 
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p" 
  xmlns:context="http://www.springframework.org/schema/context" 
  xmlns:mvc="http://www.springframework.org/schema/mvc" 
  xsi:schemaLocation="http://www.springframework.org/schema/beans  
            http://www.springframework.org/schema/beans/spring-beans-3.1.xsd  
            http://www.springframework.org/schema/context  
            http://www.springframework.org/schema/context/spring-context-3.1.xsd  
            http://www.springframework.org/schema/mvc  
            http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd"> 
  <!-- 自动扫描该包，使SpringMVC认为包下用了@controller注解的类是控制器 --> 
  <mvc:annotation-driven />  
  <mvc:default-servlet-handler/>  
  <context:annotation-config/>  
  <context:component-scan base-package="com" /> 
  <!--避免IE执行AJAX时，返回JSON出现下载文件 --> 
  <bean id="mappingJacksonHttpMessageConverter" 
    class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter"> 
    <property name="supportedMediaTypes"> 
      <list> 
        <value>text/html;charset=UTF-8</value> 
      </list> 
    </property> 
  </bean> 
  <!-- 启动SpringMVC的注解功能，完成请求和注解POJO的映射 --> 
  <bean 
    class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"> 
    <property name="messageConverters"> 
      <list> 
        <ref bean="mappingJacksonHttpMessageConverter" /> <!-- JSON转换器 --> 
      </list> 
    </property> 
  </bean> 
  <!-- 定义跳转的文件的前后缀 ，视图模式配置--> 
  <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> 
    <!-- 这里的配置我的理解是自动给后面action的方法return的字符串加上前缀和后缀，变成一个 可用的url地址 --> 
    <property name="prefix" value="/backstage/jsp/" /> 
    <property name="suffix" value=".jsp" /> 
  </bean> 
   
  <!-- 配置文件上传，如果没有使用文件上传可以不用配置，当然如果不配，那么配置文件中也不必引入上传组件包 --> 
  <bean id="multipartResolver"  
    class="org.springframework.web.multipart.commons.CommonsMultipartResolver">  
    <!-- 默认编码 -->){"