第一步：导入commons-fileupload-1.3.1.jar 和commons-io-2.2.jar 架包
第二步：在applicationContext.xml中 配置
<bean id=”multipartResolver” class=”org.springframework.web.multipart.commons.CommonsMultipartResolver”/>
第三步：在页面 <form>标签添加属性enctype=”multipart/form-data” 这个是上传文件必须的
具体一个简单方法如下
1.web.xml
1 <?xml version="1.0" encoding="UTF-8"?> 2 <web-app version="3.0" 3 xmlns="http://java.sun.com/xml/ns/javaee" 4 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 5 xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 6 http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"> 7 <display-name></display-name> 8 <welcome-file-list> 9 <welcome-file>index.jsp</welcome-file> 10 </welcome-file-list> 11 12 <!-- 配置pringmvc前端控制器 --> 13 <servlet> 14 <servlet-name>dispatcherServlet</servlet-name> 15 <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> 16 <!-- 设置springmvc的配置文件 --> 17 <init-param> 18 <param-name>contextConfigLocation</param-name> 19 <param-value>/WEB-INF/shopping-servlet.xml</param-value> 20 </init-param> 21 <load-on-startup>1</load-on-startup> 22 </servlet> 23 <servlet-mapping> 24 <servlet-name>dispatcherServlet</servlet-name> 25 <url-pattern>/</url-pattern> 26 </servlet-mapping> 27 </web-app>
2.shopping-servlet.xml
1 <?xml version="1.0" encoding="UTF-8"?> 2 <beans xmlns="http://www.springframework.org/schema/beans" 3 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 4 xmlns:p="http://www.springframework.org/schema/p" 5 xmlns:context="http://www.springframework.org/schema/context" 6 xsi:schemaLocation=" 7 http://www.springframework.org/schema/beans 8 http://www.springframework.org/schema/beans/spring-beans.xsd 9 http://www.springframework.org/schema/context 10 http://www.springframework.org/schema/context/spring-context.xsd"> 11 12 <!-- 让spring容器自动探知bean Controller Service Respoise Componet --> 13 <!-- 14 <bean class="org.springframework.web.portlet.mvc.annotation.DefaultAnnotationHandlerMapping"></bean> 15 --> 16 17 <context:component-scan base-package="com.bdqnsjz.shopping.controller"></context:component-scan> 18 19 <bean id="multipartResolver" 20 class="org.springframework.web.multipart.commons.CommonsMultipartResolver" p:maxUploadSize="34564356345456" p:maxUploadSizePerFile="3456435634545" p:defaultEncoding="utf-8"> 21 <!-- 22 <property name="defaultEncoding" value="utf-8"></property> 23 --> 24 </bean> 25 26 27 <!-- 配置视图解析器 --> 28 <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> 29 <property name="prefix" value="/WEB-INF/pages/"></property> 30 <property name="suffix" value=".jsp"></property> 31 </bean> 32 33 34 35 </beans>
3.controller
1 @RequestMapping(value="/upload1", method=RequestMethod.POST) 2 public String upload1(@RequestParam(value = "file", required = false) MultipartFile file, 3 HttpServletRequest request){ 4 5 String fileName = file.getOriginalFilename(); 6 System.out.println(fileName); 7 8 //获取扩展名 9 String extension = fileName.substring(fileName.lastIndexOf(".")); 10 11 //新的文件名 234-135234532l34kjlkj.jpg 12 String savedFileName = java.util.UUID.randomUUID().toString() + extension; 13 14 String folderPath = request.getRealPath("/WEB-INF/upload"); 15 16 File savedFile = new File(folderPath, savedFileName); 17 18 19 //保存文件 20 try { 21 file.transferTo(savedFile); 22 } catch (IOException e) { 23 e.printStackTrace(); 24 } 25 26 return "upload1"; 27 }