@Controller
public class FirstController {@RequestMapping("/first")public String doFrist(MultipartFile upload, HttpSession session){//文件不能为空if (upload.getSize()>0){String childpath=upload.getOriginalFilename();//限定类型/*  if (childpath.endsWith("jsp")){}*/String fatherpath=session.getServletContext().getRealPath("/upload");System.out.print(fatherpath);//拼接路径File file=new File(fatherpath,childpath);try {//上传upload.transferTo(file);} catch (IOException e) {e.printStackTrace();}}else{System.out.print("文件为空");}return "/index.jsp";}
}

<context:component-scan base-package="day013shangchuan"></context:component-scan><bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"><property name="maxUploadSize" value="50000000"></property> //上传文件的总大小<property name="maxUploadSizePerFile" value="50000"></property>//单个文件的大小<property name="defaultEncoding" value="utf-8"></property> //编码的字符集</bean><mvc:annotation-driven></mvc:annotation-driven>

<form action="/first" method="post" enctype="multipart/form-data">文件：<input type="file" name="upload"><input type="submit">
</form>

@Controller
public class FirstControllers {@RequestMapping("/firsts")public String doFrist(@RequestParam MultipartFile [] upload, HttpSession session){for (MultipartFile item:upload){//文件不能为空if (item.getSize()>0){String childpath=item.getOriginalFilename();//限定类型/*  if (childpath.endsWith("jsp")){}*/String fatherpath=session.getServletContext().getRealPath("/upload");System.out.print(fatherpath);//拼接路径File file=new File(fatherpath,childpath);try {//上传item.transferTo(file);} catch (IOException e) {e.printStackTrace();}}else{System.out.print("文件为空");}}return "/index.jsp";}
}

<form action="/first" method="post" enctype="multipart/form-data">文件：<input type="file" name="upload">文件1：<input type="file" name="upload">文件2：<input type="file" name="upload"><input type="submit">
</form>

public class FirstInter implements HandlerInterceptor {public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o) throws Exception {System.out.println("111");return true;}public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {System.out.println("333");}public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {System.out.println("444");}}

<context:component-scan base-package="day013shangchuan"></context:component-scan><bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"><property name="maxUploadSize" value="50000000"></property><property name="maxUploadSizePerFile" value="50000"></property><property name="defaultEncoding" value="utf-8"></property></bean><mvc:interceptors><mvc:interceptor><mvc:mapping path="/**"/><bean class="day014lanjie.FirstInter"></bean></mvc:interceptor></mvc:interceptors><mvc:annotation-driven></mvc:annotation-driven>