springMvc的配置文件的代码
使用springMVC包装的解析器（CommonsMultipartResolver）进行文件上传控制 需要引入 apache的 common-fileupload组件包加上common-io
[html] view plain copy <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd "> <!-- 配置扫描 --> <context:component-scan base-package="cn.et"></context:component-scan> <!-- 配置上传的解析器 id是写死的不能改变 --> [html] view plain copy <span style="white-space:pre"> </span><!-- 名称必须使用 multipartResolver 因为spring容器使用名称注入 文件上传解析器--> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <!-- 上传的大小限制 --> <property name="maxUploadSize" value="1048576"></property> <span style="white-space:pre"> </span></bean> </beans> action的代码
[java] view plain copy @Controller @RequestMapping(value="/day0601") public class UploadingDownloadAction { //上传的默认路径 private final String FILEPATH="E:/upload"; //下载的默认路径 private final String DOWNFILEPATH="E:/mydownload"; /** * 文件上传 * @param multipartFile * @return * @throws IllegalStateException * @throws IOException */ @RequestMapping(value="/uploading.action") public String uploading(@RequestParam(name="uploadingFile") MultipartFile multipartFile) throws IllegalStateException, IOException{ //获取上传的文件名 String fileName=multipartFile.getOriginalFilename(); //上传文件的存储路径 String file=FILEPATH+"/"+fileName; //调用这个方法直接上传 multipartFile.transferTo(new File(file)); return "/day20170601/success.jsp"; } /** * 文件下载 [java] view plain copy <span style="white-space:pre"> </span>SpringMVC使用消息转换器 ByteArrayHttpMessageConverter 设置文件内容为响应体 通过设置响应头ContentDisposition 通知浏览器下载的附件名称 * @return * @throws Exception */ @RequestMapping(value="/download.action") public ResponseEntity<byte[]> fileDowload(String downloadFile) throws Exception{ //下载文件的路径 String fileName=DOWNFILEPATH+"/"+downloadFile; //创建这个文件 File file=new File(fileName); //设置响应头 HttpHeaders hh=new HttpHeaders(); //设置下载的文件的名称 hh.setContentDispositionFormData("attachment", URLEncoder.encode(downloadFile, "UTF-8")); //读取目标文件为二进制数组 byte[] fileByte=FileCopyUtils.copyToByteArray(file); //构建ResponseEntity对象 ResponseEntity<byte[]> re=new ResponseEntity<byte[]>(fileByte, hh, HttpStatus.CREATED); return re; } }
jsp的代码
编写jsp文件跳转的动作只能是form表单，并且添加属性enctype="multipart/form-data"必需要是post提交
[html] view plain copy <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>My JSP 'uplodDownl.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> </head> <body> <form action="${pageContext.request.contextPath}/day0601/uploading.action" method="post" enctype="multipart/form-data"> <input type="file" name="uploadingFile"/> <input type="submit" value="上传"/> <a href="${pageContext.request.contextPath}/day0601/download.action?downloadFile=A.txt">下载</a> </form> </body> </html>
web.xml配置
[html] view plain copy <?xml version="1.0" encoding="UTF-8"?> <web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> <!-- spring自带的解决乱码的过滤器 --> <filter> <filter-name>utf</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> </filter> <filter-mapping> <filter-name>utf</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <filter> <!-- 配置这个selevlet来加载sprinmvc的配置文件 --> <filter-name>hidden</filter-name> <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class> </filter> <filter-mapping> <filter-name>hidden</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <servlet> <servlet-name>springmvc</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <!-- 通过这个参数去找配置文件 不加这个参数默认在 /WEB-INF/找spservlet-name-servlet.xml这个文件--> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:/springmvc.xml</param-value> </init-param> <!-- 启动tomcat的时候就加载 --> <load-on-startup>0</load-on-startup> </servlet> <servlet-mapping> <servlet-name>springmvc</servlet-name> <!-- /拦截所有以.action结尾的 --> <url-pattern>*.action</url-pattern> <!-- /拦截所有servlet --> <url-pattern>/</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> </web-app>
