spring mvc实现文件上传并携带其他参数的示例

<?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> 

<?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 -->     <property name="defaultEncoding" value="utf-8" />      <!-- 文件大小最大值 -->     <property name="maxUploadSize" value="10485760000" />      <!-- 内存中的最大值 -->     <property name="maxInMemorySize" value="40960" />    </bean>       <!-- 声明DispatcherServlet不要拦截下面声明的目录  -->    <mvc:resources location="/js/" mapping="/js/**" />     <mvc:resources location="/images/" mapping="/images/**"/>   <mvc:resources location="/css/" mapping="/css/**"/>   <mvc:resources location="/common/" mapping="/common/**"/>  </beans> 

<%@ page language="java" pageEncoding="UTF-8"%> <form action="<%=request.getContextPath()%>/users/add" method="POST" enctype="multipart/form-data">   username: <input type="text" name="username"/><br/>   nickname: <input type="text" name="nickname"/><br/>   password: <input type="password" name="password"/><br/>   yourmail: <input type="text" name="email"/><br/>   yourfile: <input type="file" name="myfiles"/><br/>    <input type="submit" value="添加新用户"/> </form> 

package com.wlsq.controller;  import java.io.File; import java.io.IOException; import java.util.HashMap; import java.util.List; import java.util.Map;  import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse;  import org.apache.commons.io.FileUtils; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.multipart.MultipartFile; import org.springframework.web.servlet.ModelAndView;  import com.wlsq.model.News; import com.wlsq.service.IUserMapperService; import com.wlsq.util.Pagination;  @Controller  @RequestMapping(value="/users") public class UserController {   @Autowired   private IUserMapperService userService;      @RequestMapping(value="/userAll")   public ModelAndView searchNews(HttpServletRequest request,HttpServletResponse response){     ModelAndView mv = null;     try{       mv = new ModelAndView();       int pageSize = Integer           .parseInt(request.getParameter("pageSize") == null ? "10"               : request.getParameter("pageSize"));       int pageNum = Integer           .parseInt(request.getParameter("pageNum") == null ? "1"               : request.getParameter("pageNum"));       Map<String, Object> maps = new HashMap<>();       maps.put("pageSize", pageSize);       maps.put("pageNum", (pageNum-1) * pageSize);       List<News> list =userService.selectAllUsers(maps);       int count = userService.selectCountUsers();       Pagination page = new Pagination(count);       page.setCurrentPage(pageNum);       mv.addObject("pnums", page.getPageNumList());       mv.addObject("currentPage", pageNum);       mv.addObject("pnext_flag", page.nextEnable());       mv.addObject("plast_flag", page.lastEnable());       page.lastPage();       mv.addObject("last_page", page.getCurrentPage());       mv.addObject("count", count);       mv.addObject("pageCount", page.getPages());       if(list !=null && list.size()>0){         //用户存在         mv.addObject("partners", list);                  //设置逻辑视图名，视图解析器会根据该名字解析到具体的视图页面         mv.setViewName("/users/users");        }else{         //用户存在         mv.addObject("partners", list);                  //设置逻辑视图名，视图解析器会根据该名字解析到具体的视图页面         mv.setViewName("/users/users");        }            }catch(Exception e){                  //设置逻辑视图名，视图解析器会根据该名字解析到具体的视图页面       mv.setViewName("/users/users");      }               return mv;   }      @RequestMapping(value="/add", method=RequestMethod.POST)   public String addUser(@RequestParam MultipartFile[] myfiles, HttpServletRequest request) throws IOException{     String username = request.getParameter("username");     String nickname = request.getParameter("nickname");     String password = request.getParameter("password");     String email = request.getParameter("email");          System.out.println("name:"+username);     System.out.println("nickname:"+nickname);     System.out.println("password:"+password);     System.out.println("email:"+email);     //如果只是上传一个文件，则只需要MultipartFile类型接收文件即可，而且无需显式指定@RequestParam注解     //如果想上传多个文件，那么 这里就要用MultipartFile[]类型来接收文件，并且还要指定@RequestParam注解     //并且上传多个文件时，前台表单中的所有<input type="file"/>的name都应该是myfiles，否则参数里的myfiles无法获取到所有上传的文件     for(MultipartFile myfile : myfiles){       if(myfile.isEmpty()){         System.out.println("文件未上传");       }else{         System.out.println("文件长度: " + myfile.getSize());         System.out.println("文件类型: " + myfile.getContentType());         System.out.println("文件名称: " + myfile.getName());         System.out.println("文件原名: " + myfile.getOriginalFilename());         System.out.println("========================================");         //如果用的是Tomcat服务器，则文件会上传到//%TOMCAT_HOME%//webapps//YourWebProject//WEB-INF//upload//文件夹中         String realPath = request.getSession().getServletContext().getRealPath("/WEB-INF/upload");         //这里不必处理IO流关闭的问题，因为FileUtils.copyInputStreamToFile()方法内部会自动把用到的IO流关掉，我是看它的源码才知道的         FileUtils.copyInputStreamToFile(myfile.getInputStream(), new File(realPath, myfile.getOriginalFilename()));       }     }          return "../../index";   }        }