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spring mvc文件上传下载
web xml springMvc 注册添加
<multipart-config> <max-file-size>20848820</max-file-size> <max-request-size>418018841</max-request-size> <file-size-threshold>1048576</file-size-threshold></multipart-config>
springMvc配置添加
<!--文件上传 200*1024*1024即200M resolveLazily属性启用是为了推迟文件解析，以便捕获文件大小异常 --> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <property name="maxUploadSize" value="209715200" /> <property name="defaultEncoding" value="UTF-8" /> <property name="resolveLazily" value="true" /> </bean>
maven添加
<dependency> <groupId>commons-io</groupId> <artifactId>commons-io</artifactId> <version>2.4</version></dependency>
上传页面
<%@ page language="java" import="java.util.*" contentType="text/html; charset=utf-8"%><%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%> <%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %><%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 ‘addfile_Jsp.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="http://www.mamicode.com/styles.css"> --> </head> <body> <form:form commandName="uploadedFile" action="file/save" method="post" enctype="multipart/form-data"> <input type="file" name="files[0]" /> <input type="text" name="alais" /><br /> <input type="file" name="files[1]" /> <input type="text" name="alais" /><br /> <input type="file" name="files[2]" /> <input type="text" name="alais" /><br /> <input type="submit" value="上传" /> </form:form> </body></html>
下载页面
<%@ page language="java" import="java.util.*" contentType="text/html; charset=utf-8"%><%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%><%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 ‘allFile_Jsp.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="http://www.mamicode.com/styles.css"> --> </head> <body> 00 <c:forEach items="${files}" var="userFile"> <tr> <td>${userFile.id}</td> <td>${userFile.name}</td> <td>${userFile.serverName}</td> <td><a href="${pageContext.request.contextPath}/file/dow?id=${userFile.id}">dow</a></td> </tr> <br/> </c:forEach> </body></html>
controller
package com.dr.controller;import java.util.List;import javax.annotation.Resource;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.springframework.stereotype.Controller;import org.springframework.ui.Model;import org.springframework.web.bind.annotation.RequestHeader;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;import org.springframework.web.bind.annotation.RequestParam;import com.dr.domain.UploadedFile;import com.dr.domain.UserFile;import com.dr.service.UserFileService;@Controller@RequestMapping("file")public class FileController { @Resource(name = "userFilesericeImpl") private UserFileService userFileService; @RequestMapping("add") public String fileAdd(Model model) { model.addAttribute("uploadedFile",new UploadedFile()); return "addfile_jsp"; } @RequestMapping("save") public String fileSave(UploadedFile uploadedFile, HttpServletRequest request,Model model) { userFileService.add(uploadedFile, request); List<UserFile>files=userFileService.getAllFile(); model.addAttribute("files",files); return "allFile_Jsp"; } @RequestMapping("allFile") public String allFile(Model model){ List<UserFile>files=userFileService.getAllFile(); model.addAttribute("files",files); return "allFile_Jsp"; } @RequestMapping(value="dow",method = RequestMethod.GET) public void getFile(@RequestParam("id")int id, HttpServletRequest request, HttpServletResponse response, @RequestHeader String referer){ userFileService.dow(id, request, response, referer); }}
servers
package com.dr.service.impl;import java.io.BufferedInputStream;import java.io.File;import java.io.FileInputStream;import java.io.IOException;import java.io.OutputStream;import java.util.ArrayList;import java.util.List;import javax.annotation.Resource;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.springframework.stereotype.Service;import org.springframework.web.multipart.MultipartFile;import com.dr.dao.UserFileDao;import com.dr.domain.UploadedFile;import com.dr.domain.UserFile;import com.dr.service.UserFileService;@Servicepublic class UserFilesericeImpl implements UserFileService { @Resource(name = "userFileDaoImpl") private UserFileDao fileDao; public boolean add(UploadedFile uploadedFile, HttpServletRequest request) { ArrayList<MultipartFile> files = uploadedFile.getFiles(); // 判断file数组不能为空并且长度大于0 if (files != null && files.size() > 0) { // 循环获取file数组中得文件 for (int i = 0; i < files.size(); i++) { MultipartFile file = files.get(i); // TODO Auto-generated method stub // 判断文件是否为空 if (!file.isEmpty()) { try { // 服务器名称防止重名 String ServiceName = System.currentTimeMillis() + "" + (int) (1 + Math.random() * (100 - 1 + 1)); // 文件保存路径 String filePath = request.getSession() .getServletContext().getRealPath("/") + "WEB-INF/file/" + ServiceName; // 转存文件 file.transferTo(new File(filePath)); // 图片信息存入数据库 UserFile userFile = new UserFile(); userFile.setName(file.getOriginalFilename()); userFile.setServerName(ServiceName); fileDao.save(userFile); } catch (Exception e) { e.printStackTrace(); return false; } } } } return true; } @Override public List<UserFile> getAllFile() { // TODO Auto-generated method stub return fileDao.findAll(UserFile.class); } @Override public void deleteFile(int id) { // TODO Auto-generated method stub fileDao.delete(UserFile.class, id); } @Override public void dow(int id, HttpServletRequest request, HttpServletResponse response, String referer) { // TODO Auto-generated method stub if (referer != null) { String filePath = request.getSession().getServletContext() .getRealPath("/") + "WEB-INF/file"; UserFile userFile = fileDao.get(UserFile.class, id); File file = new File(filePath, userFile.getServerName()); if (file.exists()) { byte[] buffer = new byte[1024]; FileInputStream fis = null; BufferedInputStream bis = null; // if you‘re using Java 7, use try-with-resources try { response.setContentType("application/octet-stream"); // 名字还原 response.setHeader( "Content-disposition", "attachment; filename=" + new String(userFile.getName().getBytes( "utf-8"), "ISO8859-1")); fis = new FileInputStream(file); bis = new BufferedInputStream(fis); OutputStream os = response.getOutputStream(); int i = bis.read(buffer); while (i != -1) { os.write(buffer, 0, i); i = bis.read(buffer); } } catch (IOException ex) { // do something here } finally { if (bis != null) { try { bis.close(); } catch (IOException e) { } } if (fis != null) { try { fis.close(); } catch (IOException e) { } } } } } }}
上传列表实体
package com.dr.domain;import java.io.Serializable;import java.util.ArrayList;import org.springframework.web.multipart.MultipartFile;public class UploadedFile implements Serializable { private static final long serialVersionUID = 72348L; private ArrayList<MultipartFile> files; public ArrayList<MultipartFile> getFiles() { return files; } public void setFiles(ArrayList<MultipartFile> files) { this.files = files; }}
文件实体类
package com.dr.domain;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.GenerationType;import javax.persistence.Id;import javax.persistence.Table;@Entity@Table(name="user_file")public class UserFile { @Id @GeneratedValue(strategy=GenerationType.IDENTITY) private Integer id; private String name; private String serverName; public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getServerName() { return serverName; } public void setServerName(String serverName) { this.serverName = serverName; } @Override public String toString() { return "UserFile [id=" + id + ", name=" + name + ", serverName=" + serverName + "]"; } public UserFile(Integer id, String name, String serverName) { super(); this.id = id; this.name = name; this.serverName = serverName; } public UserFile() { super(); } }
spring mvc文件上传下载
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