附件管理实现过程记录

1.整体功能演示

附件管理包括以下功能：上传附件、删除附件、下载单个文件、打包下载多个文件。全部功能演示如下：

2.程序入口

	//打开上传附件界面
	function selfUploadFile()
	{
		var url = "<%=request.getContextPath()%>/scripts/common/document/DocumentList.jsp?fileID=<%=oFile.getFILEID()%>&r="+new Date().getTime();
		var rtn = window.showModalDialog(url,document,'dialogWidth:650px;dialogHeight:500px;dialogLeft:600px;dialogTop:250px;scroll:no;');
	}

3.界面设计

3.1 带图标按钮，实现绑定点击事件、鼠标进入和离开的样式

4.上传附件功能,实现选择文件后自动上传，并刷新列表界面

目标：为点击按钮，打开文件选择框，选择文件后自动上传，上传结束后，进行提示，并刷新列表界面。

初始设计：一开始，设计为在form表单里放一个隐藏的input type="file"控件，一个“上传”按钮。在“上传”按钮的点击事件里用js调用input type="file"控件的click()事件，弹出文件选择框选择文件后，js提交form表单。结果，一提交，文件框自动清空，后台获取不到提交的文件。经测试，必须手动点击文件框选择文件后提交后台才能获取到文件。

改进设计：在“上传”按钮上放置form表单，表单enctype="multipart/form-data"，表单里放一个input type="file"控件，

设置向左偏移并透明margin-left: -80px;FILTER: alpha(opacity=0)，

文件选择改变后提交表单onchange="document.getElementById('form').submit();"，

后台处理程序保存文件action="<%=request.getContextPath()%>/scripts/common/document/UploadFiles.jsp?referenceID=<%=referenceID%>"

后台保存上传的文件后自动刷新页面String url = request.getHeader("referer");response.sendRedirect(url);

前端代码：

后台处理程序核心代码(UploadFiles.jsp)：

		DiskFileItemFactory factory = new DiskFileItemFactory();
		factory.setSizeThreshold(1024 * 1024  * 20);////设置上传工厂的限制
		ServletFileUpload upload = new ServletFileUpload(factory);
		upload.setSizeMax(1024 * 1024 * 20);//设置最大的上传限制
		List items = upload.parseRequest(request);//处理HTTP请求，items是所有的表单项
		for(int i =0; i < items.size(); i ++){
			FileItem fileItem=(FileItem)items.get(i);
			String name = fileItem.getName();
			if(name==null || name.trim().length()==0)
			{
				continue;
			}
			name = name.substring(name.lastIndexOf("\\")+1);
			String title = name.substring(0,name.lastIndexOf('.'));
			int size = (int)fileItem.getSize();
			String contentType=fileItem.getContentType();
			byte[] fileContent=fileItem.get();	
			Attachment attachment =  new Attachment();
			attachment.setFileName(name);
			attachment.setFileContentType(contentType);
			attachment.setFileSize(size);
			attachment.setFileContent(fileContent);			
			attachment.setFileTitle(title);
			attachment.setReferenceID(referenceID);
	//		attachment.setFileType(fileType);				
			attachment.setUploader(userid);			
			String result = ga.update("xt_document",attachment);
		}

5.ajax实现删除文件，并刷新界面

5.1 台前ajax请求删除

        var url = "<%=request.getContextPath()%>/scripts/common/document/DeleteFiles.jsp";
		$.ajax({
               cache: true,
               type: "POST",
               dataType:"json",
               url:url,
               data:{fileIDs:fileIDs},
               async: false,
               error: function(request) {
                   alert("error");
               },
               success: function(data) {
                   if(data.code==0)
                   {
                   	  alert(data.msg);
                   }else
                   {
                        alert(data.msg);
						reload.href =  window.location.href; 
						reload.click();	
                   }
               }
		    });

5.2 后台删除处理程序核心代码(DeleteFiles.jsp)

	request.setCharacterEncoding("UTF-8");
	
	JSONObject retJson = new JSONObject();
	String code = "1";
	String msg = "操作成功";
	String data = "";

	String p_userid = (String)session.getAttribute("userid");
	ICommonService	gd = (ICommonService)ServiceHelper.getService(CommonConstants.COMMON_SERVICE);
	String fileIDs = StringUtility.toTrimString(request.getParameter("fileIDs"));
	Set<String> fileIDsSet = new HashSet<String>();

	try{
		if(fileIDs!=null && fileIDs.trim().length()>0)
		{
	        String[] fileIDsArr = fileIDs.split(",");
	        gd.deleteData("XT_Document", "FileID/[@0]", fileIDsArr);
		}
		
		retJson.put("code", code);
		retJson.put("msg", msg);
		retJson.put("data", "");
		out.write(retJson.toString());
	} catch (Exception e) {
		e.printStackTrace(System.out);
		code = "0";
		msg = e.getMessage();
		retJson.put("code", code);
		retJson.put("msg", msg);
		retJson.put("data", "");
		out.write(retJson.toString());
	}

5.3 使用JS刷新showModalDialog窗口,JS刷新模式对话框

5.3.1 在showModalDialo窗口的<html>与<Head>之间加上<base target="_self"> ,使这个页面上链接都在本窗口中打开 
5.3.2 在页面中加一个隐藏<a>标签，如：<a id="reload" href="" tyle="display:none">reload</a> 
5.3.3 在JS中把当前页面的地址赋到<a>的href属性中，执行单击事件。 
reload.href =  window.location.href ; 
reload.click(); 
说明：reload为定义的<a>标签的ID

6.文件下载功能

6.1 前台调用下载功能js

    function downloadAttachment()//下载
    {
        var fileIDs = getSelectedIDs();
        if(fileIDs==null || fileIDs=="" || fileIDs==undefined)
        {
 	        alert("请选择记录");
 	        return;
        }
        var url = "<%=request.getContextPath()%>/scripts/common/document/DownloadFiles.jsp?fileIDs="+fileIDs;
        var rtn = window.open(url);
    }
    function downloadAllAttachment()//下载全部
    {
        var url = "<%=request.getContextPath()%>/scripts/common/document/DownloadFiles.jsp?referenceID=<%=referenceID%>";
        var rtn = window.open(url);
    }

6.1 单个文件下载核心代码(DownloadFiles.jsp)

  		    String fileID = fileIDsSet.iterator().next();
  		    Attachment att = gatt.getAttachment("XT_Document",fileID);
			String fileName = new String(att.getFileName().getBytes(),"iso-8859-1");
			byte[] context = att.getFileContent();
            //1.设置文件ContentType类型，这样设置，会自动判断下载文件类型  
            response.setContentType("multipart/form-data");  
            //2.设置文件头：最后一个参数是设置下载文件名 
            response.setHeader("Content-Disposition", "attachment;fileName="+fileName);  
            java.io.OutputStream os = response.getOutputStream();
  
            os.write(context);   
            //注意看以下几句的使用  
            os.flush();  
            os.close();
            response.flushBuffer();  
            out.clear();  
            out = pageContext.pushBody();

6.2多个文件打包下载核心代码(DownloadFiles.jsp)

  			response.reset();
			response.setContentType("application/zip");
			response.setHeader("Content-Disposition", "attachment;filename=attachment.zip");
			java.io.OutputStream os = response.getOutputStream();
			ZipArchiveOutputStream zos = new ZipArchiveOutputStream(os);
			Iterator<String> it = fileIDsSet.iterator();
  		    while(it.hasNext())
  		    {
  		        String fileID = it.next();
  		        Attachment att = gatt.getAttachment("XT_Document",fileID);
				String fileName = att.getFileName();
				String fileTitle = att.getFileTitle();
				byte[] context = att.getFileContent();
				int fileSize = att.getFileSize();
				String strFileSize = "";
				if (fileSize > 1024)
				{
					strFileSize = fileSize / 1024 + "KB";
				}
				else
				{
					strFileSize = fileSize + "Byte";
				}
				ZipArchiveEntry entry = new ZipArchiveEntry(fileName);
				zos.putArchiveEntry(entry);
				zos.write(context);
				zos.closeArchiveEntry();
  		    }
			zos.flush();
			zos.close();
            //注意看以下几句的使用  
            os.flush();  
            os.close();
            response.flushBuffer();  
            out.clear();  
            out = pageContext.pushBody();

6.3 获取和保存sql server image类型字段值的方法

6.4 servlet下载文件中文文件名无法识别的问题

7.全部代码清单

7.1 DocumentList.jsp

<%@page import="java.text.SimpleDateFormat"%>
<%@page import="java.text.DateFormat"%>
<%@page import="com.costech.common.helper.AuthHelper" %>
<%@page import="com.costech.common.util.StringUtility" %>
<%@page import="com.costech.common.constants.CommonConstants"%>
<%@page import="com.costech.common.service.ICommonService"%>
<%@page import="com.costech.common.helper.ServiceHelper"%>
<%@page import="com.costech.common.bean.Attachment" %>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
	String path = request.getContextPath();
	String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
	DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
	ICommonService	gd = (ICommonService)ServiceHelper.getService(CommonConstants.COMMON_SERVICE);
	String referenceID = StringUtility.toTrimString(request.getParameter("fileID"));
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title>附件管理</title>
    <base target="_self">
    <script src='<%=request.getContextPath() %>/include/jquery-1.11.1.min.js'></script>
	<SCRIPT language=JavaScript src="<%=request.getContextPath()%>/include/list.js"></SCRIPT>
    <style type="text/css">
		table{border-right:1px solid #B2CCE5;border-bottom:1px solid #B2CCE5;font-size: 12px;} 
		table th{background-color:#E0EAF7; border-left:1px solid #B2CCE5;border-top:1px solid #B2CCE5;color:#01245E;}
		table td{border-left:1px solid #B2CCE5;border-top:1px solid #B2CCE5;}
    </style>
    
<script language="JavaScript" type="text/JavaScript">
    function getSelectedIDs()
    {
        var fileIDs = "";
        var i=0;
		$("input[name='chxCheckFileID']").each(function(){
		   var fileID = $(this).val();
		   if($(this).is(":checked") && fileID !== null && fileID !== undefined && fileID !== '')
		   {
		       if(i==0)
		       {
		           fileIDs = fileID;
		       }else
		       {
		           fileIDs = fileIDs+","+fileID;
		       }
		       i++;
		   }
 	    });
		return fileIDs;
    }
    
	function deleteAttachment()
	{
        var fileIDs = getSelectedIDs();
        if(fileIDs==null || fileIDs=="" || fileIDs==undefined)
        {
 	        alert("请选择记录");
 	        return;
        }
        if(!confirm("确认要删除？"))
        {  
        	return;  
        } 
        var url = "<%=request.getContextPath()%>/scripts/common/document/DeleteFiles.jsp";
		$.ajax({
               cache: true,
               type: "POST",
               dataType:"json",
               url:url,
               data:{fileIDs:fileIDs},
               async: false,
               error: function(request) {
                   alert("error");
               },
               success: function(data) {
                   if(data.code==0)
                   {
                   	  alert(data.msg);
                   }else
                   {
                        alert(data.msg);
						reload.href =  window.location.href; 
						reload.click();	
                   }
               }
		    });
	}
	
    function downloadAttachment()//下载
    {
        var fileIDs = getSelectedIDs();
        if(fileIDs==null || fileIDs=="" || fileIDs==undefined)
        {
 	        alert("请选择记录");
 	        return;
        }
        var url = "<%=request.getContextPath()%>/scripts/common/document/DownloadFiles.jsp?fileIDs="+fileIDs;
        var rtn = window.open(url);
    }
    function downloadAllAttachment()//下载全部
    {
        var url = "<%=request.getContextPath()%>/scripts/common/document/DownloadFiles.jsp?referenceID=<%=referenceID%>";
        var rtn = window.open(url);
    }
    function allCheckbox_onclick(obj)
    {
		$("input[name='chxCheckFileID']").attr("checked",obj.checked);
    }
</script>
    
  </head>
  
  <body>
  	<div style="width: 100%;height: 20px;background-color: #E0EAF7;">
   		<button type="button" style="valign: middle;cursor: hand;background-color: transparent; border: 0;">
				<img src="<%=request.getContextPath() %>/image/common/attach_upload.gif" width="15" height="15" align="absbottom">上传
		</button>
  	    <form id="form" action="<%=request.getContextPath()%>/scripts/common/document/UploadFiles.jsp?referenceID=<%=referenceID%>" 
  	    	  method="post" enctype="multipart/form-data" style="display: inline;"> 
  	        <input type="file" name="fileSelect" id="fileSelect" style="width: 0px;margin-left: -80px;FILTER: alpha(opacity=0);cursor: hand;" 
  	               onchange="document.getElementById('form').submit();"/>
  	    </form>
  		<button type="button" style="valign: middle;cursor: hand;background-color: transparent; border: 0;"
				onclick="deleteAttachment()" onmouseover="style.backgroundColor='white'" onMouseOut="style.backgroundColor='#E0EAF7'">
				<img src="<%=request.getContextPath() %>/image/common/attach_delete.gif" width="15" height="15" align="absbottom">删除 
		</button>
  		<button type="button" style="valign: middle;cursor: hand;background-color: transparent; border: 0;"
				onclick="downloadAttachment()" onmouseover="style.backgroundColor='white'" onMouseOut="style.backgroundColor='#E0EAF7'">
				<img src="<%=request.getContextPath() %>/image/common/putintofolder.gif" width="15" height="15" align="absbottom">下载 
		</button>
  		<button type="button" style="valign: middle;cursor: hand;background-color: transparent; border: 0;"
				onclick="downloadAllAttachment()" onmouseover="style.backgroundColor='white'" onMouseOut="style.backgroundColor='#E0EAF7'">
				<img src="<%=request.getContextPath() %>/image/common/putintofolder.gif" width="15" height="15" align="absbottom">下载全部 
		</button>
  	</div>
  	<div style="height: 98%;OVERFLOW-Y: auto;border: 3px solid #B2CCE5;">
  		<table style="width: 100%;" cellspacing="0" cellpadding="0">
  			<thead>
  				<tr>
  					<th style="width:30px;text-align: center;"><input type="checkbox" onclick="allCheckbox_onclick(this)"/></th>
  					<th style="width:30px;">序号</th>
  					<th>文件名</th>
  					<th>文件大小</th>
  					<th>上传人</th>
  					<th>上传时间</th>
  				</tr>
  			</thead>
  			<tbody>
  			<%
  			String sql = "select d.FileID,d.FileName,d.FileSize,d.FileTitle,u.username Uploader,d.UploadDate from XT_Document d "
  			    +" left join xt_user u on d.Uploader=u.userid "
  			    +" where d.ReferenceID ='" + referenceID + "'";
  			List list = gd.getDataList(sql, Attachment.class);
  			
  			for(int i=0;i<list.size();i++)
  			  {
  			    Attachment att = (Attachment)list.get(i);
  			    int fileSize = att.getFileSize();
				String strFileSize = "";
				
				if (fileSize>1024*1024)
				{
				    strFileSize = fileSize/1024/1024 + "M";
				}else if(fileSize>1024)
				{
					strFileSize = fileSize/1024 + "KB";
				}
				else
				{
					strFileSize = fileSize + "Byte";
				}
  			    String uploadDate = "";
  			    if(att.getUploadDate()!=null)
  			    {
  			      uploadDate = df.format(att.getUploadDate());
  			    }
  			%>
  				<tr onmouseover="style.backgroundColor='#B2CCE5'" onmouseout="style.backgroundColor='<%=(i%2==0?"#FFFFFF":"#ECF6F9")%>'" style="background-color: <%=(i%2==0?"#FFFFFF":"#ECF6F9")%>">
  					<td style="text-align: center;"><input type="checkbox" name='chxCheckFileID' value="<%=att.getFileID() %>"/></td>
  					<td style="text-align: center;"><%=i+1 %></td>
  					<td><%=att.getFileName() %></td>
  					<td><%=strFileSize %></td>
  					<td><%=att.getUploader() %></td>
  					<td><%=uploadDate %></td>
  				</tr>
			<%
  			  }
  			%>
  			</tbody>
  		</table>
  	</div>
   	<a id="reload" href="" tyle="display:none">reload</a>
  </body>
</html>

7.2 UploadFiles.jsp

<%@page contentType="text/html;charset=utf-8"%>
<%@ page language="java" import="java.util.List"%>
<%@ page language="java" import="org.apache.commons.fileupload.*"%>
<%@ page language="java" import="org.apache.commons.fileupload.disk.*"%>
<%@ page language="java" import="org.apache.commons.fileupload.servlet.*"%>
<%@page import="com.costech.common.util.StringUtility"%>
<%@page import="com.costech.common.helper.AttachmentHelper" %>
<%@page import="com.costech.common.bean.Attachment" %>
<%@page import="com.costech.common.service.ICommonService"%>
<%@page import="com.costech.common.helper.ServiceHelper"%>
<%@page import="com.costech.common.constants.CommonConstants"%>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<%
	request.setCharacterEncoding("utf-8");
	String referenceID = StringUtility.toStringValue(request.getParameter("referenceID"),"");
	ICommonService gd = (ICommonService)ServiceHelper.getService(CommonConstants.COMMON_SERVICE);
	AttachmentHelper ga = new AttachmentHelper();
	String userid = (String)session.getAttribute("userid");
	try{
		DiskFileItemFactory factory = new DiskFileItemFactory();
		factory.setSizeThreshold(1024 * 1024  * 20);////设置上传工厂的限制
		ServletFileUpload upload = new ServletFileUpload(factory);
		upload.setSizeMax(1024 * 1024 * 20);//设置最大的上传限制
		List items = upload.parseRequest(request);//处理HTTP请求，items是所有的表单项
		for(int i =0; i < items.size(); i ++){
			FileItem fileItem=(FileItem)items.get(i);
			String name = fileItem.getName();
			if(name==null || name.trim().length()==0)
			{
				continue;
			}
			name = name.substring(name.lastIndexOf("\\")+1);
			String title = name.substring(0,name.lastIndexOf('.'));
			int size = (int)fileItem.getSize();
			String contentType=fileItem.getContentType();
			byte[] fileContent=fileItem.get();	
			Attachment attachment =  new Attachment();
			attachment.setFileName(name);
			attachment.setFileContentType(contentType);
			attachment.setFileSize(size);
			attachment.setFileContent(fileContent);			
			attachment.setFileTitle(title);
			attachment.setReferenceID(referenceID);
	//		attachment.setFileType(fileType);				
			attachment.setUploader(userid);			
			String result = ga.update("xt_document",attachment);
		}
	}catch(Exception e)
	{
		e.printStackTrace();
	}
	String url = request.getHeader("referer");
	response.sendRedirect(url);
%>

7.3 DeleteFiles.jsp

<%@page import="java.util.*" %>
<%@page import="com.costech.common.constants.CommonConstants"%>
<%@page import="com.costech.common.service.ICommonService"%>
<%@page import="com.costech.common.helper.ServiceHelper"%>
<%@page import="com.costech.common.util.StringUtility" %>
<%@page import="com.costech.common.util.json.JSONObject"%>
<%@page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>


<%
	request.setCharacterEncoding("UTF-8");
	
	JSONObject retJson = new JSONObject();
	String code = "1";
	String msg = "操作成功";
	String data = "";

	String p_userid = (String)session.getAttribute("userid");
	ICommonService	gd = (ICommonService)ServiceHelper.getService(CommonConstants.COMMON_SERVICE);
	String fileIDs = StringUtility.toTrimString(request.getParameter("fileIDs"));
	Set<String> fileIDsSet = new HashSet<String>();

	try{
		if(fileIDs!=null && fileIDs.trim().length()>0)
		{
	        String[] fileIDsArr = fileIDs.split(",");
	        gd.deleteData("XT_Document", "FileID/[@0]", fileIDsArr);
		}
		
		retJson.put("code", code);
		retJson.put("msg", msg);
		retJson.put("data", "");
		out.write(retJson.toString());
	} catch (Exception e) {
		e.printStackTrace(System.out);
		code = "0";
		msg = e.getMessage();
		retJson.put("code", code);
		retJson.put("msg", msg);
		retJson.put("data", "");
		out.write(retJson.toString());
	}
%>

7.4 DownloadFiles.jsp

<%@page import="java.util.*" %>
<%@page import="com.costech.common.helper.AuthHelper" %>
<%@page import="com.costech.common.constants.CommonConstants"%>
<%@page import="com.costech.common.service.ICommonService"%>
<%@page import="com.costech.common.helper.ServiceHelper"%>
<%@page import="com.costech.common.util.StringUtility" %>
<%@page import="com.costech.common.bean.Attachment" %>
<%@page import="com.costech.common.component.page.VOPager" %>
<%@page import="com.costech.common.helper.AttachmentHelper" %>
<%@page	import="java.io.BufferedInputStream"%>
<%@page	import="java.io.BufferedOutputStream"%>
<%@page	import="java.io.File"%>
<%@page import="java.io.FileInputStream"%>
<%@page	import="java.io.FileOutputStream"%>
<%@page	import="java.io.IOException"%>
<%@page	import="java.io.InputStream"%>
<%@page	import="java.io.OutputStream"%>
<%@page	import="org.apache.commons.compress.archivers.zip.*"%>
<%@page import="com.costech.module.hr.chk.util.ContantsAdmin"%>
<%@ include file="/include/General.jsp" %>

<%
	String p_userid = (String)session.getAttribute("userid");
	ICommonService	gd = (ICommonService)ServiceHelper.getService(CommonConstants.COMMON_SERVICE);
	AttachmentHelper gatt = new AttachmentHelper();
	String fileIDs = StringUtility.toTrimString(request.getParameter("fileIDs"));
	String referenceID = StringUtility.toTrimString(request.getParameter("referenceID"));
	Set<String> fileIDsSet = new HashSet<String>();
	if(fileIDs!=null && fileIDs.trim().length()>0)
	{
        String[] fileIDsArr = fileIDs.split(",");
        for(int i=0;i<fileIDsArr.length;i++)
        {
            if(fileIDsArr[i]==null || fileIDsArr[i].trim().length()==0)
            {
               continue;
            }
            fileIDsSet.add(fileIDsArr[i]);
        }
	}else if(referenceID!=null && referenceID.trim().length()>0)
	{
  	    String sql = "select FileID from XT_Document where ReferenceID ='" + referenceID + "'";
  		List list = gd.getDataList(sql, Attachment.class);
  		for(int i=0;i<list.size();i++)
  		{
  			Attachment att = (Attachment)list.get(i);
  			fileIDsSet.add(att.getFileID());
  	    }
	}else
	{
	    return;
	}


	try{
  		if(fileIDsSet.size()==1)//选择一个文件
  		{
  		    String fileID = fileIDsSet.iterator().next();
  		    Attachment att = gatt.getAttachment("XT_Document",fileID);
			String fileName = new String(att.getFileName().getBytes(),"iso-8859-1");
			byte[] context = att.getFileContent();
            //1.设置文件ContentType类型，这样设置，会自动判断下载文件类型  
            response.setContentType("multipart/form-data");  
            //2.设置文件头：最后一个参数是设置下载文件名 
            response.setHeader("Content-Disposition", "attachment;fileName="+fileName);  
            java.io.OutputStream os = response.getOutputStream();
  
            os.write(context);   
            //注意看以下几句的使用  
            os.flush();  
            os.close();
            response.flushBuffer();  
            out.clear();  
            out = pageContext.pushBody();
  		}else if(fileIDsSet.size()>1)//选择多个文件，则打包下载
  		{
  			response.reset();
			response.setContentType("application/zip");
			response.setHeader("Content-Disposition", "attachment;filename=attachment.zip");
			java.io.OutputStream os = response.getOutputStream();
			ZipArchiveOutputStream zos = new ZipArchiveOutputStream(os);
			Iterator<String> it = fileIDsSet.iterator();
  		    while(it.hasNext())
  		    {
  		        String fileID = it.next();
  		        Attachment att = gatt.getAttachment("XT_Document",fileID);
				String fileName = att.getFileName();
				String fileTitle = att.getFileTitle();
				byte[] context = att.getFileContent();
				int fileSize = att.getFileSize();
				String strFileSize = "";
				if (fileSize > 1024)
				{
					strFileSize = fileSize / 1024 + "KB";
				}
				else
				{
					strFileSize = fileSize + "Byte";
				}
				ZipArchiveEntry entry = new ZipArchiveEntry(fileName);
				zos.putArchiveEntry(entry);
				zos.write(context);
				zos.closeArchiveEntry();
  		    }
			zos.flush();
			zos.close();
            //注意看以下几句的使用  
            os.flush();  
            os.close();
            response.flushBuffer();  
            out.clear();  
            out = pageContext.pushBody();
  		}
	} catch (Exception e) {
		e.printStackTrace(System.out);
	} finally {

	}
%>