1. springmvc.xml必須配置:

<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver" p:defaultEncoding="utf-8"/>

2. WEB-INF/lib下必加入:

commons-fileupload.jar與commons-io-1.4.jar二個(gè)文件

3. 表單屬性為:

enctype="multipart/form-data"

工程項(xiàng)目圖片如下:

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4. 具體代碼如下:

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　　FileUploadBean.java???????

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public class FileUploadBean { private byte[] file;public void setFile(byte[] file) {this.file = file;}public byte[] getFile() {return file;} } package net.liuzd.web;import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.net.BindException; import java.util.ArrayList;import java.util.List; import java.util.Map;import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse;import org.springframework.stereotype.Controller; import org.springframework.util.FileCopyUtils; 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.springframework.web.multipart.commons.CommonsMultipartFile; import org.springframework.web.servlet.ModelAndView;/*** Title: Description: Copyright: Copyright (c) 2011* Company:http://liuzidong.iteye.com/ Makedate:2011-5-27 下午01:52:17* * @author liuzidong* @version 1.0* @since 1.0* */ @Controller public class FileUploadController {@RequestMapping(value = "/upload", method = RequestMethod.POST)public ModelAndView onSubmit(HttpServletRequest request,HttpServletResponse response, BindException errors)throws Exception {MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;CommonsMultipartFile file = (CommonsMultipartFile) multipartRequest.getFile("file");String name = multipartRequest.getParameter("name");System.out.println("name: " + name);// 獲得文件名：String realFileName = file.getOriginalFilename();System.out.println("獲得文件名：" + realFileName);// 獲取路徑String ctxPath = request.getSession().getServletContext().getRealPath("/")+ "images/";// 創(chuàng)建文件File dirPath = new File(ctxPath);if (!dirPath.exists()) {dirPath.mkdir();}File uploadFile = new File(ctxPath + realFileName);FileCopyUtils.copy(file.getBytes(), uploadFile);request.setAttribute("files", loadFiles(request));return new ModelAndView("success");}@RequestMapping(value = "/upload2", method = RequestMethod.POST)public ModelAndView onSubmit2(HttpServletRequest request,HttpServletResponse response, BindException errors)throws Exception {// 轉(zhuǎn)型為MultipartHttpRequestMultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;// 根據(jù)前臺(tái)的name名稱得到上傳的文件MultipartFile file = multipartRequest.getFile("file");// 獲得文件名：String realFileName = file.getOriginalFilename();// 獲取路徑String ctxPath = request.getSession().getServletContext().getRealPath("/")+ "\\" + "images\\";// 創(chuàng)建文件File dirPath = new File(ctxPath);if (!dirPath.exists()) {dirPath.mkdir();}File uploadFile = new File(ctxPath + realFileName);FileCopyUtils.copy(file.getBytes(), uploadFile);request.setAttribute("files", loadFiles(request));return new ModelAndView("success");}@RequestMapping(value = "/upload3", method = RequestMethod.POST)public String upload(@RequestParam("file")MultipartFile image, HttpServletRequest request) throws IOException {String ctxPath = request.getSession().getServletContext().getRealPath("/")+ "\\" + "images\\";System.out.println("路徑：" + ctxPath);File file = new File(ctxPath + "/" + image.getOriginalFilename());// FileCopyUtils.copy(image.getBytes(),new// File(ctxPath+"/"+image.getOriginalFilename()));try {image.transferTo(file); // 保存上傳的文件} catch (IllegalStateException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}request.setAttribute("files", loadFiles(request));return "success";}// 多文件上傳@RequestMapping(value = "/upload4", method = RequestMethod.POST)public ModelAndView fileUpload(HttpServletRequest request,HttpServletResponse response, BindException errors)throws Exception {MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;Map<String, MultipartFile> fileMap = multipartRequest.getFileMap();String ctxPath = request.getSession().getServletContext().getRealPath("/")+ "\\" + "images\\";File file = new File(ctxPath);if (!file.exists()) {file.mkdir();}String fileName = null;for (Map.Entry<String, MultipartFile> entity : fileMap.entrySet()) {// 上傳文件名// System.out.println("key: " + entity.getKey());MultipartFile mf = entity.getValue();fileName = mf.getOriginalFilename();File uploadFile = new File(ctxPath + fileName);FileCopyUtils.copy(mf.getBytes(), uploadFile);}request.setAttribute("files", loadFiles(request));return new ModelAndView("success");}// @ModelAttribute("files")//此屬性用于初始類時(shí)調(diào)用,但上傳文件后不能時(shí)時(shí)反應(yīng)上傳文件個(gè)數(shù),不適合動(dòng)態(tài)數(shù)據(jù)public List<String> loadFiles(HttpServletRequest request) {List<String> files = new ArrayList<String>();String ctxPath = request.getSession().getServletContext().getRealPath("/")+ "\\" + "images\\";File file = new File(ctxPath);if (file.exists()) {File[] fs = file.listFiles();String fname = null;for (File f : fs) {fname = f.getName();if (f.isFile()) {files.add(fname);}}}return files;}@RequestMapping("/download/{fileName}")public ModelAndView download(@PathVariable("fileName")String fileName, HttpServletRequest request, HttpServletResponse response)throws Exception {response.setContentType("text/html;charset=utf-8");request.setCharacterEncoding("UTF-8");java.io.BufferedInputStream bis = null;java.io.BufferedOutputStream bos = null;String ctxPath = request.getSession().getServletContext().getRealPath("/")+ "\\" + "images\\";String downLoadPath = ctxPath + fileName;System.out.println(downLoadPath);try {long fileLength = new File(downLoadPath).length();response.setContentType("application/x-msdownload;");response.setHeader("Content-disposition", "attachment; filename="+ new String(fileName.getBytes("utf-8"), "ISO8859-1"));response.setHeader("Content-Length", String.valueOf(fileLength));bis = new BufferedInputStream(new FileInputStream(downLoadPath));bos = new BufferedOutputStream(response.getOutputStream());byte[] buff = new byte[2048];int bytesRead;while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) {bos.write(buff, 0, bytesRead);}} catch (Exception e) {e.printStackTrace();} finally {if (bis != null)bis.close();if (bos != null)bos.close();}return null;} }

5. spring.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.xsdhttp://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd"><!-- 自動(dòng)搜索@Controller標(biāo)注的類用于指明系統(tǒng)從哪個(gè)路徑下尋找controller，然后提前初始化這些對(duì)象。--><context:component-scan base-package="net.liuzd.web" /><!-- ③：對(duì)模型視圖名稱的解析，即在模型視圖名稱添加前后綴 --><beanclass="org.springframework.web.servlet.view.InternalResourceViewResolver"p:prefix="/WEB-INF/jsp/" p:suffix=".jsp" /><bean id="multipartResolver"class="org.springframework.web.multipart.commons.CommonsMultipartResolver" p:defaultEncoding="utf-8"><property name="maxUploadSize"><value>104857600</value></property><property name="maxInMemorySize"><value>4096</value></property></bean> </beans>

6. success.jsp

<%@ taglib prefix="c" uri="/WEB-INF/c.tld"%> <h1>Upload Successful</h1><c:forEach var="month" items="${files}"><li><a href="${pageContext.request.contextPath}/download/${month}.do">${month}</a></li></c:forEach><hr><br><a href="${pageContext.request.contextPath}/index.jsp">返回</a>

7. web.xml

<?xml version="1.0" encoding="UTF-8"?> <web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"><context-param><param-name>log4jConfigLocation</param-name><param-value>/WEB-INF/classes/log4j.properties</param-value></context-param><context-param><param-name>log4jRefreshInterval</param-name><param-value>60000</param-value></context-param><context-param><param-name>log4jExposeWebAppRoot</param-name><param-value>false</param-value></context-param><listener><listener-class>org.springframework.web.util.Log4jConfigListener</listener-class></listener><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>false</param-value></init-param></filter><filter-mapping><filter-name>encodingFilter</filter-name><url-pattern>*.do</url-pattern></filter-mapping><filter-mapping><filter-name>encodingFilter</filter-name><url-pattern>*.jsp</url-pattern></filter-mapping><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:springmvc.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>index.jsp</welcome-file></welcome-file-list> </web-app>

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