总结下近期学习SpringMVC在网上看到的资料后，自己优化实现的多文件上传和下载的功能。如有问题，请留言哦~
1、依赖jar包
ant.jar
commons-fileupload-1.3.1.jar
connom-io.jar
2、spring-mvc.xml文件配置
<?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:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.2.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd">
<!-- 扫描路径 -->
<context:component-scan base-package="com.sc.controller">
<context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
<!-- 视图层配置 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/view/"/>
<property name="suffix" value=".jsp"/>
</bean>
<!--<!–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>
</beans>
3、文件上传的页面:fileOperate/upload.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>文件上传</title>
</head>
<body>
<form method="post" action="/fileupload" enctype="multipart/form-data">
<center>
<input type="file" name="file1" />
别名：<input type="text" name="alais" />
<br />
<input type="file" name="file2" />
别名：<input type="text" name="alais" />
<br />
<input type="file" name="file3" />
别名：<input type="text" name="alais" />
<br><br>
<input type="submit" value="上传" />
</center>
</form>
</body>
</html>
上传成功后的页面:fileOperate/list.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@page isELIgnored="false" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>上传文件列表</title>
</head>
<body>
<h1>上传多个附件的列表</h1>
<c:forEach items="${result}" var="item">
<c:forEach items="${item}" var="m">
<c:if test="${m.key eq 'realName' }">
上传文件原名: ${m.value }
<br />
</c:if>
<c:if test="${m.key eq 'storeName' }">
上传文件名（压缩后）: ${m.value } <a href="/filedownload?filename=${m.value}">下载</a>
<br />
</c:if>
<c:if test="${m.key eq 'path' }">
上传文件路径: ${m.value }
<br />
</c:if>
<c:if test="${m.key eq 'alais' }">
别名: ${m.value }
<br />
</c:if>
</c:forEach>
</c:forEach>
</body>
</html>
Controller类：FileOperateController.java
package com.sc.controller;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.sc.utils.FileOperateUtil;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.ServletRequestUtils;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
/**
* 文件的上传和下载
*
* @author zcq12
*
*/
@Controller
public class FileOperateController {
/**
* 到上传文件的位置
*
* @author geloin
* @date 2012-3-29 下午4:01:31
* @return
*/
@RequestMapping(value = "/to_upload")
public String toUpload() {
return "fileOperate/upload";
}
/**
* 上传文件
*
* @author sundy
* @param request
* @return
* @throws Exception
*/
@RequestMapping(value = "/fileupload")
public ModelAndView upload(HttpServletRequest request) throws Exception {
Map<String, Object> map = new HashMap<String, Object>();
// 别名
String[] alaises = ServletRequestUtils.getStringParameters(request, "alais");
String[] params = new String[] { "alais" };
Map<String, Object[]> values = new HashMap<String, Object[]>();
values.put("alais", alaises);
List<Map<String, Object>> result = FileOperateUtil.upload(request, params, values);
map.put("result", result);
return new ModelAndView("fileOperate/list", map);
}
/**
* 下载
*
* @author sundy
* @param request
* @param response
* @return
* @throws Exception
*/
@RequestMapping(value = "/filedownload")
public ModelAndView download(HttpServletRequest request, HttpServletResponse response) throws Exception {
// 下载源
String storeName = request.getParameter("filename");
System.out.println(storeName+"~~~~~~~~~~~~~~~~~~~~~~~~~~~~~");
// 下载之后的文件名
String realName = "myPhoto.zip";
String contentType = "application/octet-stream";
FileOperateUtil.download(request, response, storeName, contentType, realName);
return null;
}
}
工具类：FileOperateUtil.java
package com.sc.utils;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.tools.zip.ZipEntry;
import org.apache.tools.zip.ZipOutputStream;
import org.springframework.util.FileCopyUtils;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.MultipartHttpServletRequest;
public class FileOperateUtil {
private static final String REALNAME = "realName";
private static final String STORENAME = "storeName";
private static final String SIZE = "size";
private static final String SUFFIX = "suffix";
private static final String CONTENTTYPE = "contentType";
private static final String CREATETIME = "createTime";
private static final String UPLOADDIR = "uploadDir";
/**
* 将上传的文件进行重命名
*
* @author zhang_cq
* @param name
* @return
*/
private static String rename(String name) {
Long now = Long.parseLong(new SimpleDateFormat("yyyyMMddHHmmss").format(new Date()));
Long random = (long) (Math.random() * now);
String fileName = now + "" + random;
if (name.indexOf(".") != -1) {
fileName += name.substring(name.lastIndexOf("."));
}
return fileName;
}
/**
* 压缩后的文件名
*
* @author zhang_cq
* @param name
* @return
*/
private static String zipName(String name) {
String prefix = "";
if (name.indexOf(".") != -1) {
prefix = name.substring(0, name.lastIndexOf("."));
} else {
prefix = name;
}
return prefix + ".zip";
}
/**
* 上传文件
*
* @author sundy
* @param request
* @param params
* @param values
* @return
* @throws Exception
*/
public static List<Map<String, Object>> upload(HttpServletRequest request, String[] params, Map<String, Object[]> values) throws Exception {
List<Map<String, Object>> result = new ArrayList<Map<String, Object>>();
MultipartHttpServletRequest mRequest = (MultipartHttpServletRequest) request;
// 获得上传的文件
Map<String, MultipartFile> fileMap = mRequest.getFileMap();
// 文件上传后存放的地址
String uploadDir = request.getSession().getServletContext().getRealPath("/") + FileOperateUtil.UPLOADDIR+File.separator;
File file = new File(uploadDir);
if (!file.exists()) {
file.mkdir();
}
// 文件名称
String fileName = null;
int i = 0;
for (Iterator<Map.Entry<String, MultipartFile>> it = fileMap.entrySet().iterator(); it.hasNext(); i++) {
Map.Entry<String, MultipartFile> entry = it.next();
MultipartFile mFile = entry.getValue();
// 上传的文件名
fileName = mFile.getOriginalFilename();
// 将文件名重新命名
String storeName = rename(fileName);
// 上传文件的路径+名称
String noZipName = uploadDir + storeName;
// 压缩后的文件名
String zipName = zipName(noZipName);
// 上传成为压缩文件
ZipOutputStream outputStream = new ZipOutputStream(new BufferedOutputStream(new FileOutputStream(zipName)));
outputStream.putNextEntry(new ZipEntry(fileName));
outputStream.setEncoding("GBK");
FileCopyUtils.copy(mFile.getInputStream(), outputStream);
if(fileName!=null && !"".equals(fileName) && !"null".equals(fileName)){
// request.setAttribute("filename",storeName+"zip");
System.out.println(storeName+"--------------------------------------------------");
Map<String, Object> map = new HashMap<String, Object>();
// 固定参数值对
map.put(FileOperateUtil.REALNAME, fileName); // 图片元名
map.put(FileOperateUtil.STORENAME, zipName(storeName)); // 压缩后的名称
map.put(FileOperateUtil.SIZE, new File(zipName).length()); // 图片大小
map.put(FileOperateUtil.SUFFIX, "zip"); //后缀
map.put(FileOperateUtil.CONTENTTYPE, "application/octet-stream"); // 格式
map.put(FileOperateUtil.CREATETIME, new Date()); // 创建日期
map.put("path", uploadDir);
// 自定义参数值对
for (String param : params) {
map.put(param, values.get(param)[i]);
}
result.add(map);
}
}
return result;
}
/**
* 下载
*
* @author sundy
* @param request
* @param response
* @param storeName
* @param contentType
* @param realName
* @throws Exception
*/
public static void download(HttpServletRequest request, HttpServletResponse response, String storeName,
String contentType, String realName) throws Exception {
response.setContentType("text/html;charset=UTF-8");
request.setCharacterEncoding("UTF-8");
BufferedInputStream bis = null;
BufferedOutputStream bos = null;
// 下载源路径
String ctxPath = request.getSession().getServletContext().getRealPath("/") + FileOperateUtil.UPLOADDIR+File.separator;
String downLoadPath = ctxPath + storeName;
long fileLength = new File(downLoadPath).length();
response.setContentType(contentType);
response.setHeader("Content-disposition",
"attachment; filename=" + new String(realName.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);
}
bis.close();
bos.close();
}
}
ok，现在看一下实现效果。
启动tomcat,在浏览器中输入地址：http://localhost:8080/to_upload
image.png
image.png
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