SpringMVC上传下载，页面不刷新提交带附件的form表单

周所周知，如果要提交的form表单内带有附件，那么需要设置属性enctype="multipart/form-data"

当我们要实现页面不刷新提交form表单的时候需要用到ajax，但是ajax提交form表单的时候需要将表单值进行序列化操作（$(formId).formSerialize()）。

所以问题出现了，表单序列化后form表单内的文件在后台就接不到了。

所以带有附件的form表单不能用ajax提交。既然我们要实现页面不刷新，那就需要模拟ajax进行提交form表单。   

我是用隐藏的iframe实现的：

前提条件：

springmvc配置文件中加上     <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"/> 

需要jar包：ant-1.6.5.jar;commons-fileupload-1.2.2.jar;commons-io-2.0.1.jar

代码示例：

上传文件jsp页面：

<form  id="form2"  name="form2"   target="hidden_frame" enctype="multipart/form-data"  method="post" >  <!--two end-->   <h4 class="title_bg_b">      <span class="title_left">软件升级</span> </h4> <ul class="form_list_ul clear">       <li class="clear">               <span class="list_li_span">软件安装包：</span>              <input type="file"   id="file1"  name="file1"/>            <input type="button"  name="button2"  onclick="uploadFile()" class="blue_btn" value="上传" /><span id="msgspan"></span>            <input type="button"  name="button2" id="shengji" class="blue_btn" onclick="Upgrade()" title="正在实现" value="升级" />                       </li> </ul>  </form> <iframe name='hidden_frame' id="hidden_frame" style='display:none' width="99%"></iframe>

js函数：

function createPrompt(info){var msgw,msgh,bordercolor;msgw=400;//提示窗口的宽度msgh=100;//提示窗口的高度titleheight=25//提示窗口标题高度bordercolor="#336699";//提示窗口的边框颜色titlecolor="#99CCFF";//提示窗口的标题颜色var sWidth,sHeight;sWidth=document.body.offsetWidth;//浏览器工作区域内页面宽度 或使用 screen.width//屏幕的宽度sHeight=screen.height;//屏幕高度（垂直分辨率）//背景层（大小与窗口有效区域相同，即当弹出对话框时，背景显示为放射状透明灰色）var bgObj=document.createElement("div");//创建一个div对象（背景层） //动态创建元素，这里创建的是 div//定义div属性，即相当于(相当于，但确不是，必须对对象属性进行定义//<div id="bgDiv" style="position:absolute; top:0; background-color:#777; filter:progid:DXImagesTransform.Microsoft.Alpha(style=3,opacity=25,finishOpacity=75); opacity:0.6; left:0; width:918px; height:768px; z-index:10000;"></div>bgObj.setAttribute('id','bgDiv');bgObj.style.position="absolute";bgObj.style.top="0";bgObj.style.background="#777";bgObj.style.filter="progid:DXImageTransform.Microsoft.Alpha(style=3,opacity=25,finishOpacity=75";bgObj.style.opacity="0.6";bgObj.style.left="0";bgObj.style.width=sWidth + "px";bgObj.style.height=sHeight + "px";bgObj.style.zIndex = "10000";document.body.appendChild(bgObj);//在body内添加该div对象//创建一个div对象（提示框层）var msgObj=document.createElement("div")//定义div属性，即相当于//<div id="msgDiv" align="center" style="background-color:white; border:1px solid #336699; position:absolute; left:50%; top:50%; font:12px/1.6em Verdana,Geneva,Arial,Helvetica,sans-serif; margin-left:-225px; margin-top:npx; width:400px; height:100px; text-align:center; line-height:25px; z-index:100001;"></div>msgObj.setAttribute("id","msgDiv");msgObj.setAttribute("align","center");msgObj.style.background="white";msgObj.style.border="1px solid " + bordercolor;msgObj.style.position = "absolute";msgObj.style.left = "50%";msgObj.style.top = "50%";msgObj.style.font="12px/1.6em Verdana, Geneva, Arial, Helvetica, sans-serif";msgObj.style.marginLeft = "-225px" ;msgObj.style.marginTop = -75+document.documentElement.scrollTop+"px";msgObj.style.width = msgw + "px";msgObj.style.height =msgh + "px";msgObj.style.textAlign = "center";msgObj.style.lineHeight ="25px";msgObj.style.zIndex = "10001";document.body.appendChild(msgObj);//在body内添加提示框div对象msgObjvar txt=document.createElement("p");//创建一个p对象（提示框提示信息）//定义p的属性，即相当于//<p style="margin:1em 0;" id="msgTxt">测试效果</p>txt.style.margin="1em 0"txt.setAttribute("id","msgTxt");txt.innerHTML=info;//来源于函数调用时的参数值document.getElementById("msgDiv" ).appendChild(txt);//在提示框div中添加提示信息对象txtvar img=document.createElement("img");img.src="/resources/images/waiting.gif";img.style.width="150";img.style.height="25";img.style.align="center";document.getElementById("msgDiv").appendChild(img);}

后台控制类：

package com.bohui.ipview.common;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.servlet.ModelAndView;import com.bohui.ipview.bean.FileUploadBean;/** *  * @author caohaicheng * @date 2014-3-20 上午11:56:35 */@Controller@RequestMapping(value = "fileOperate")public class FileOperateController {/** * 上传文件 *  * @author caohaicheng * @date 2014-3-20 上午11:56:35 * @param request * @return * @throws Exception */@RequestMapping(value = "upload1")public ModelAndView  upload(HttpServletRequest request) throws Exception {ModelAndView mv=new ModelAndView("sysconfig/fileUploadResult");FileUploadBean fup  = new FileUploadBean();fup=FileOperateUtil.upload(request );mv.addObject("fileName",fup.getFileName() );mv.addObject("fileSize",fup.getFileSize() );mv.addObject("FileCreateDate", fup.getFileCreateDate());mv.addObject("returnDesc", fup.getReturnDesc());mv.addObject("returnFlag",fup.getReturnFlag() );return mv;}/** * 下载 *  * @author caohaicheng * @date 2014-3-20 上午11:56:35 * @param attachment * @param request * @param response * @return * @throws Exception */@RequestMapping(value = "download")public ModelAndView download(HttpServletRequest request,HttpServletResponse response) throws Exception {String storeName = "201205051340364510870879724.zip";String realName = "Java设计模式.zip";String contentType = "application/octet-stream";FileOperateUtil.download(request, response, storeName, contentType,realName);return null;}}

实现类：

package com.bohui.ipview.common;import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileInputStream;import java.text.SimpleDateFormat;import java.util.Date;import java.util.Iterator;import java.util.Map;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.springframework.util.FileCopyUtils;import org.springframework.web.multipart.MultipartFile;import org.springframework.web.multipart.MultipartHttpServletRequest;import com.bohui.ipview.bean.FileUploadBean;import com.bohui.ipview.util.DateTimeUtil;/** *  * @author caohaicheng * @date 2014-3-20 上午11:56:35 */public class FileOperateUtil {private static final String UPLOADDIR = "/bh/update/";// 上传后放在哪个位置(linux)private static final String UPLOADDIR1 = "/bh/backup/";// 上传后放在哪个位置(linux)/** * 将上传的文件进行重命名 *  * @author caohaicheng * @date 2014-3-20 上午11:56:35 * @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 caohaicheng * @date 2014-3-20 上午11:56:35 * @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 caohaicheng * @date 2014-3-20 上午11:56:35 * @param request * @param params * @param values * @return * @throws Exception */public static FileUploadBean upload(HttpServletRequest request) throws Exception {FileUploadBean fup  = new FileUploadBean();MultipartHttpServletRequest mRequest = (MultipartHttpServletRequest) request;Map<String, MultipartFile> fileMap = mRequest.getFileMap();//String uploadDir = request.getSession().getServletContext().getRealPath("/")+ FileOperateUtil.UPLOADDIR;   //上传至相对路径String uploadDir =  FileOperateUtil.UPLOADDIR;//上传至绝对路径String uploadDir1 =  FileOperateUtil.UPLOADDIR1;//上传至绝对路径,这个是备份文件夹File file = new File(uploadDir);File file1 = new File(uploadDir1);//如果不存在该路径就创建if (!file.exists()) {file.mkdir();}if (!file1.exists()) {file1.mkdir();} delAllFile(uploadDir); //删除完里面所有内容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();fileName = mFile.getOriginalFilename();//获得文件名字//String storeName = rename(fileName);//对文件进行重命名String noZipName = uploadDir + fileName;//文件路径String noZipName1 = uploadDir1 + fileName;        File uploadFile = new File(noZipName);           File uploadFile1 = new File(noZipName1);   //String zipName = zipName(noZipName);//获得压缩后的文件名字// 上传成为压缩文件/*  ZipOutputStream outputStream = new ZipOutputStream(new BufferedOutputStream(new FileOutputStream(noZipName)));outputStream.putNextEntry(new ZipEntry(fileName));outputStream.setEncoding("GBK");FileCopyUtils.copy(mFile.getInputStream(), outputStream); */        try {FileCopyUtils.copy(mFile.getBytes(), uploadFile);} catch (Exception e) {fup.setReturnDesc("升级文件上传失败");fup.setReturnFlag(false);e.printStackTrace();return fup;}                   try {FileCopyUtils.copy(mFile.getBytes(), uploadFile1);} catch (Exception e) {fup.setReturnDesc("升级文件备份失败");fup.setReturnFlag(false);e.printStackTrace();return fup;}           fup.setReturnFlag(true);        fup.setFileName(fileName);        fup.setFileCreateDate(DateTimeUtil.nowToString());        fup.setFileSize( new File(noZipName).length());}return fup;}/** * 下载 *  * @author caohaicheng * @date 2014-3-20 上午11:56:35 * @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;String ctxPath = request.getSession().getServletContext().getRealPath("/")+ FileOperateUtil.UPLOADDIR;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();}//删除指定文件夹下所有文件//param path 文件夹完整绝对路径   public static boolean delAllFile(String path) {       boolean flag = false;       File file = new File(path);       if (!file.exists()) {         return flag;       }       if (!file.isDirectory()) {         return flag;       }       String[] tempList = file.list();       File temp = null;       for (int i = 0; i < tempList.length; i++) {          if (path.endsWith(File.separator)) {             temp = new File(path + tempList[i]);          } else {              temp = new File(path + File.separator + tempList[i]);          }          if (temp.isFile()) {             temp.delete();          }          if (temp.isDirectory()) {             delAllFile(path + "/" + tempList[i]);//先删除文件夹里面的文件             flag = true;          }       }       return flag;     }}

上传状态实体类：

package com.bohui.ipview.bean;public class FileUploadBean {    private String fileName;    private Long fileSize;    private String FileCreateDate;    private String returnDesc;    private Boolean returnFlag;        public String getFileName() {return fileName;}public void setFileName(String fileName) {this.fileName = fileName;}public String getFileCreateDate() {return FileCreateDate;}public void setFileCreateDate(String fileCreateDate) {FileCreateDate = fileCreateDate;}public String getReturnDesc() {return returnDesc;}public void setReturnDesc(String returnDesc) {this.returnDesc = returnDesc;}public Boolean getReturnFlag() {return returnFlag;}public void setReturnFlag(Boolean returnFlag) {this.returnFlag = returnFlag;}public long getFileSize() {return fileSize;}public void setFileSize(long l) {this.fileSize = l;}        }

子页面jsp文件fileUploadResult.jsp：

<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="ISO-8859-1"%><!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>Insert title here</title><script  type="text/javascript">function parentTishi(){parent.tishi("${fileName}","${fileSize}","${FileCreateDate}","${returnDesc}","${returnFlag}");}</script></head><body onload="parentTishi()" >这里是上传文件的返回页面.....</body></html>