SpringMVC基础(二)采用注解上传文件
同时需要注意的是,上传文件无论什么框架都需要用到"enctype"上传方式必须采用method方式。
上传两个jar包:
com.springsource.org.apache.commons.fileupload
com.springsource.org.apache.commons
web.xml
<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*:config/springAnnotation-servlet.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <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> <init-param> <param-name>forceEncoding</param-name> <param-value>true</param-value> </init-param> </filter> <!-- encoding filter for jsp page --> <filter-mapping> <filter-name>encodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <servlet-mapping> <servlet-name>springMVC</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping>
springAnnotation-servlet.xml文件
<!-- 注解扫描包 --> <context:component-scan base-package="com.tgb.web.controller.annotation" /> <!-- 开启注解 --> <mvc:annotation-driven/> <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/"></property> <property name="suffix" value=".jsp"></property> </bean> <!-- SpringMVC上传文件时,需要配置MultipartResolver处理器 --> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <property name="defaultEncoding" value="utf-8" /> <!-- 指定所上传文件的总大小。注意maxUploadSize属性的限制不是针对单个文件,而是所有文件的容量之和 --> <property name="maxUploadSize" value="10485760000" /> <property name="maxInMemorySize" value="40960" /> </bean>
jsp页面:
<body> <h>添加用户</h> <form name="userForm" action="/springMVC7/file/upload2" method="post" enctype="multipart/form-data" > 选择文件:<input type="file" name="file"> <input type="submit" value="上传" > </form> </body>
controller:
@RequestMapping("/upload2") public String upload2(HttpServletRequest request,HttpServletResponse response) throws IllegalStateException, IOException{ //定义一个解释器,解析request,拿到springMVC初始化的上下文,解析上下文 CommonsMultipartResolver multipartResolver = new CommonsMultipartResolver(request.getSession().getServletContext()); //判断request是否为map类型数据 if(multipartResolver.isMultipart(request)){ //转换SpringMVC封装好的文件类型 MultipartHttpServletRequest multiRequest = (MultipartHttpServletRequest)request; //定义迭代器获取文件名称 Iterator<String> iter = multiRequest.getFileNames(); while(iter.hasNext()){ //获取文件,MultipartFile定义文件类型 MultipartFile file = multiRequest.getFile((String)iter.next()); if(file != null){ //定义输出文件名称 String fileName = "demoUpload" + file.getOriginalFilename(); //定义输出路径 String path = "D:/" + fileName; //new 一个文件类型 File localFile = new File(path); //将上传文件转到本地文件 file.transferTo(localFile); } } } return "/success"; } }
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