详解spring mvc(注解)上传文件的简单例子

<?xml version="0" encoding="UTF-8"?> <web-app xmlns:xsi="http://wwwworg/2001/XMLSchema-instance" xmlns="http://javasuncom/xml/ns/javaee" xmlns:web="http://javasuncom/xml/ns/javaee/web-app_2_xsd" xsi:schemaLocation="http://javasuncom/xml/ns/javaee http://javasuncom/xml/ns/javaee/web-app_2_xsd" id="WebApp_ID" version="5">  <display-name>webtest</display-name>   <listener>     <listener-class>orgspringframeworkwebcontextContextLoaderListener</listener-class>   </listener>   <context-param>     <param-name>contextConfigLocation</param-name>     <param-value>       /WEB-INF/config/applicationContextxml       /WEB-INF/config/codeifActionxml     </param-value>   </context-param>    <servlet>     <servlet-name>dispatcherServlet</servlet-name>     <servlet-class>orgspringframeworkwebservletDispatcherServlet</servlet-class>     <init-param>       <param-name>contextConfigLocation</param-name>       <param-value>/WEB-INF/config/codeifActionxml</param-value>     </init-param>     <load-on-startup>1</load-on-startup>   </servlet>   <!-- 拦截所有以do结尾的请求 -->   <servlet-mapping>     <servlet-name>dispatcherServlet</servlet-name>     <url-pattern>*do</url-pattern>   </servlet-mapping>   <welcome-file-list>   <welcome-file>indexdo</welcome-file>  </welcome-file-list> </web-app> 

<?xml version="0" encoding="UTF-8"?> <beans xmlns="http://wwwspringframeworkorg/schema/beans"   xmlns:xsi="http://wwwworg/2001/XMLSchema-instance" xmlns:p="http://wwwspringframeworkorg/schema/p"   xmlns:context="http://wwwspringframeworkorg/schema/context"   xsi:schemaLocation="http://wwwspringframeworkorg/schema/beans http://wwwspringframeworkorg/schema/beans/spring-beans-xsd   http://wwwspringframeworkorg/schema/context http://wwwspringframeworkorg/schema/context/spring-context-xsd"   default-lazy-init="true">    <!-- 启动Spring MVC的注解功能，完成请求和注解POJO的映射 -->   <bean class="orgspringframeworkwebservletmvcannotationAnnotationMethodHandlerAdapter" lazy-init="false" />    <!-- 另外最好还要加入DefaultAnnotationHandlerMapping，不然会被 XML或其它的映射覆盖！ -->   <bean class="orgspringframeworkwebservletmvcannotationDefaultAnnotationHandlerMapping" />    <!-- 对模型视图名称的解析，即在模型视图名称添加前后缀 -->   <bean class="orgspringframeworkwebservletviewInternalResourceViewResolver" p:prefix="/WEB-INF/jsp/" p:suffix="jsp" />    <!-- 支持上传文件 -->   <bean id="multipartResolver" class="orgspringframeworkwebmultipartcommonsCommonsMultipartResolver"/>  </beans> 

<?xml version="0" encoding="UTF-8"?> <beans xmlns="http://wwwspringframeworkorg/schema/beans"   xmlns:xsi="http://wwwworg/2001/XMLSchema-instance" xmlns:context="http://wwwspringframeworkorg/schema/context"   xsi:schemaLocation="http://wwwspringframeworkorg/schema/beans http://wwwspringframeworkorg/schema/beans/spring-beans-xsd   http://wwwspringframeworkorg/schema/context http://wwwspringframeworkorg/schema/context/spring-context-xsd"   default-lazy-init="true">    <bean id="uploadAction" class="comcodeifactionUploadAction" />  </beans> 

package comcodeifaction;  import javaioFile; import javautilDate;  import javaxservlethttpHttpServletRequest;  import orgspringframeworkstereotypeController; import orgspringframeworkuiModelMap; import orgspringframeworkwebbindannotationRequestMapping; import orgspringframeworkwebbindannotationRequestParam; import orgspringframeworkwebmultipartMultipartFile;  @Controller public class UploadAction {    @RequestMapping(value = "/uploaddo")   public String upload(@RequestParam(value = "file", required = false) MultipartFile file, HttpServletRequest request, ModelMap model) {      Systemoutprintln("开始");     String path = requestgetSession()getServletContext()getRealPath("upload");     String fileName = filegetOriginalFilename(); //    String fileName = new Date()getTime()+"jpg";     Systemoutprintln(path);     File targetFile = new File(path, fileName);     if(!targetFileexists()){       targetFilemkdirs();     }      //保存     try {       filetransferTo(targetFile);     } catch (Exception e) {       eprintStackTrace();     }     modeladdAttribute("fileUrl", requestgetContextPath()+"/upload/"+fileName);      return "result";   }  } 

<%@ page pageEncoding="utf-8"%> <!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>上传图片</title> </head> <body> <form action="uploaddo" method="post" enctype="multipart/form-data"> <input type="file" name="file" /> <input type="submit" value="Submit" /></form> </body> </html> 

<%@ page pageEncoding="utf-8"%> <!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>上传结果</title> </head> <body> <img alt="" src="${fileUrl }" /> </body> </html>