springmvc 文件上传和拦截器

文件上传：

单文件：

@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";} }

　　配置文件：

<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>

　　jsp页面：：

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

　　多文件上传：

@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";} }

　配置和上面的一样

  jsp页面：

<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>

   

 

   拦截器：

      

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");}}

　　

配置文件：

  

<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>

　　

 

 

 

        

转载于:https://www.cnblogs.com/xu06123/p/8694317.html

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