本实例要用的到jar包:
如果你用的是maven,pom.xml文件如下:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>springMVC_upload</groupId> <artifactId>springMVC_upload</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>war</packaging> <name /> <description /> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> </properties> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.11</version> </dependency> <!--Spring --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>3.2.1.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>3.2.1.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context-support</artifactId> <version>3.2.1.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> <version>3.2.1.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aop</artifactId> <version>3.2.1.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>3.2.1.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>3.2.1.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>3.2.1.RELEASE</version> <scope>test</scope> </dependency> <!--log4j --> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>1.2.17</version> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> <version>1.2</version> <scope>provided</scope> </dependency> <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>jsp-api</artifactId> <version>2.1</version> <scope>provided</scope> </dependency> <!-- servlet --> <dependency> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> <version>2.5</version> <scope>provided</scope> </dependency> <!--fileUpload --> <dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>1.2.2</version> </dependency> <!--io --> <dependency> <groupId>commons-io</groupId> <artifactId>commons-io</artifactId> <version>2.4</version> </dependency> </dependencies> <build> <plugins> <plugin> <artifactId>maven-war-plugin</artifactId> </plugin> <plugin> <artifactId>maven-compiler-plugin</artifactId> <configuration> <source>1.6</source> <target>1.6</target> </configuration> </plugin> </plugins> </build> </project>
配置文件:spring_mvc.xml
<?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-3.0.xsd"> <!-- 注解资源扫描包路径 --> <context:component-scan base-package="org.yzr.controller" /> <bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" /> <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" /> <!-- 对模型视图名称的解析,即在模型视图名称添加前后缀,在requestmapping输入的地址后自动调用该类进行视图解析 --> <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" /> <property name="prefix" value="/" /><!-- 跳转页面的前缀路径 如 /web-inf/user/ --> <property name="suffix" value=".jsp"></property><!-- 跳转页面后缀 如 helloWorld.jsp --> </bean> <!-- 上传拦截,如最大上传值及最小上传值 --> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <!-- one of the properties available; the maximum file size in bytes --> <property name="maxUploadSize" value="10000000" /> </bean> </beans>
配置文件:web.xml
<?xml version="1.0" encoding="UTF-8"?> <web-app version="3.0" 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_3_0.xsd"> <display-name></display-name> <!-- Spring监听器 --> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring_mvc.xml</param-value> </context-param> <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> <filter-mapping> <filter-name>encodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!-- spring mvc servlet --> <servlet> <description>spring mvc servlet</description> <servlet-name>springMvc</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <description>spring mvc 配置文件</description> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring_mvc.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>springMvc</servlet-name> <url-pattern>*.do</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>multipartFileUpload.jsp</welcome-file> <welcome-file>oneFileUpload.jsp</welcome-file> <welcome-file>index.jsp</welcome-file> </welcome-file-list> </web-app>
文件上传与下载:FileUploadAndDownloadController.java
package org.yzr.controller; import java.io.File; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.util.ArrayList; import java.util.List; import java.util.UUID; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.io.FileUtils; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.multipart.MultipartFile; import org.springframework.web.multipart.MultipartHttpServletRequest; import org.yzr.model.UploadFile; /** * 上传文件 * * @author yizhaorong * */ @Controller public class FileUploadAndDownloadController { /** * 单文件上传 * * @param request * @param name * @param file * @return */ @RequestMapping(value = "/oneFileUpload", method = RequestMethod.POST) public String handleFormUpload(HttpServletRequest request, @RequestParam("name") String name, @RequestParam("file") MultipartFile file) { String dir = request.getSession().getServletContext().getRealPath("/") + "upload"; List<UploadFile> uploadFiles = new ArrayList<UploadFile>(); if (!file.isEmpty()) { try { String realName = this.copyFile(file.getInputStream(), dir, file.getOriginalFilename()); UploadFile u = new UploadFile(); u.setRealName(realName); u.setName(name); uploadFiles.add(u); } catch (IOException e) { e.printStackTrace(); } } request.setAttribute("uploadFiles", uploadFiles); return "success"; } /** * 多文件上传 * * @param request * @param name * @return */ @RequestMapping(value = "/multipartFileUpload", method = RequestMethod.POST) public String upload2(MultipartHttpServletRequest request, @RequestParam("name") String name // 页面上的控件值 ) { List<UploadFile> uploadFiles = new ArrayList<UploadFile>(); List<MultipartFile> files = request.getFiles("file"); String dir = request.getSession().getServletContext().getRealPath("/") + "upload"; for (int i = 0; i < files.size(); i++) { if (!files.get(i).isEmpty()) { try { String realName = this.copyFile(files.get(i).getInputStream(), dir, files.get(i).getOriginalFilename()); UploadFile u = new UploadFile(); u.setRealName(realName); u.setName(files.get(i).getOriginalFilename()); uploadFiles.add(u); } catch (IOException e) { e.printStackTrace(); } } } request.setAttribute("uploadFiles", uploadFiles); return "success"; } /** * 文件下载 * * @param response * @param request * @param realName * @param name */ @RequestMapping("/download/{realName}/{name}") public void download(HttpServletResponse response, HttpServletRequest request, @PathVariable String realName, @PathVariable String name) { OutputStream os = null; response.reset(); realName = request.getSession().getServletContext().getRealPath("/") + "upload" + File.separator + realName; response.setHeader("Content-Disposition", "attachment; filename=" + name); response.setContentType("application/octet-stream; charset=utf-8"); try { os = response.getOutputStream(); os.write(FileUtils.readFileToByteArray(new File(realName))); os.flush(); } catch (IOException e) { e.printStackTrace(); } finally { if (os != null) { try { os.close(); } catch (IOException e) { e.printStackTrace(); } } } } /** * 写文件到当前目录的upload目录中 * * @param in * @param fileName * @throws IOException */ private String copyFile(InputStream in, String dir, String fileName) throws IOException { fileName = fileName.substring(fileName.lastIndexOf(".")); String realName = UUID.randomUUID().toString() + fileName; File file = new File(dir, realName); if (!file.exists()) { if (!file.getParentFile().exists()) { file.getParentFile().mkdirs(); } file.createNewFile(); } FileUtils.copyInputStreamToFile(in, file); return realName; } }
用于保存上传文件的基本属性的类:UploadFile.java
package org.yzr.model; import java.io.Serializable; public class UploadFile implements Serializable { private static final long serialVersionUID = 1L; private int id; private String realName; private String name; public int getId() { return id; } public void setId(int id) { this.id = id; } public String getRealName() { return realName; } public void setRealName(String realName) { this.realName = realName; } public String getName() { return name; } public void setName(String name) { this.name = name; } }
附件提供的是maven版的文件