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用JSP實現上傳文件的兩種方法

以前用cos作文件上傳,但是對於文件上傳後的改名還需要借助其他的工具。

摘錄如下:


在用Java開發企業器系統的使用,特別是涉及到與辦公相關的軟件開發的時候,文件的上傳是客戶經常要提到的要求.因此有 一套很好文件上傳的解決辦法也能方便大家在這一塊的開發.

首先申明,該文章是為了自己記錄一備以後開發需要的時候,不用手忙腳亂哈哈........

現在在國內用的非常多的一般是兩種方法解決來解決文件上傳.

cos.jar + uploadbean.jar + filemover.jar
這個是用的非常普遍的,原因是因為他操作方便,是我們不必再去關注,那些文件的輸入和輸出流,使我們從底層的流中解脫出來.
UploadFile,UploadBean,MultipartFormDataRequest

<%@ page contentType="text/html;charset=gb2312" %>
<head>
<title>fbysss UploadBean 示例</title>
<!--meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"-->
<!--meta http-equiv="Content-Type" content="text/html; charset=gb2312"-->
</head>
<FORM name="form1" METHOD="POST" ACTION="sssupload.jsp" ENCTYPE="multipart/form-data">
<input name="title" type= "text" value="中文字">
<td class="bodystyle">附件</td>
<td class="bodystyle"> <input name="attach" type="FILE" id="attach" size="50" > </td>
<input name="ok" type= "submit" value="提交">
</form>

2.讀取表單頁面sssgetdata.jsp

<!--
//==========================================================================
//文件:UploadBean上傳實例
//功能:解決中文亂碼,完成文件上傳,並提供上傳改名解決方案
//作者:fbysss
//msn:[email protected]
//==========================================================================
-->
<%@ page contentType="text/html;charset=GBK" %>
<%@ page language="java" import="com.jspsmart.upload.*"%>
<%@ page import="java.text.SimpleDateFormat"%>
<%@ page import="java.io.File"%>
<%@ page import="java.util.*"%>
<%@ page import="javazoom.upload.*"%>
<%@ page import="uploadutilities.FileMover"%>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
</head>
<%
request.setCharacterEncoding("GBK");//設置編碼格式,就不用一個個轉碼了。
FileMover fileMover = new FileMover();//你也可以使用自帶的實例中jsp:useBean的形式。
UploadBean upBean = new UploadBean();
MultipartFormDataRequest mrequest = null;
Hashtable files = null;

if (MultipartFormDataRequest.isMultipartFormData(request))
{
mrequest = new MultipartFormDataRequest(request,null,100*1024*1024,MultipartFormDataRequest.COSPARSER,"GBK");//注意這裡也要設置編碼參數
String sTt0 = mrequest.getParameter("title");
out.println("<br>Title0是:"+sTt0+"<br>");
String sTt1 = new String(sTt0.getBytes("ISO-8859-1"),"GBK");
out.println("<br>Title1是:"+sTt1+"<br>");
//這裡用來測試title參數是否正確。調試的時候,加一句if (true)return;即可。
files = mrequest.getFiles();
}


//獲取修改前的文件名
String sOldFileName =mrequest.getParameter("oldfilename");
out.println("sOldFileName:"+sOldFileName);
String sWebRootPath = request.getRealPath("/");//得到你的web應用的根。
String sPath=sWebRootPath+"attach";
int iFileCount = 0;
String sServerFileName="";
String sLocalFileName = "";
//文件獲取
if ( (files != null) || (!files.isEmpty()) ) {

iFileCount = files.size();
UploadFile file = (UploadFile) files.get("attach");
sLocalFileName=file.getFileName();
out.println("sLocalFileName:"+sLocalFileName);
int ii= sLocalFileName.indexOf("."); //取文件名的後綴
String sExt = sLocalFileName.substring(ii,sLocalFileName.length());
//得到不重復的文件名
java.util.Date dt = new java.util.Date(System.currentTimeMillis());
SimpleDateFormat fmt = new SimpleDateFormat("yyyyMMddHHmmssSSS");
sServerFileName= fmt.format(dt);
sServerFileName =sServerFileName + sExt;
//如果不存在該目錄,則新建一個
File dir =new File(sPath);
if (!dir.exists()){
dir.mkdirs();
}
upBean.setFolderstore(sPath);//設置要上傳的目錄
upBean.addUploadListener(fileMover);//增加filMover監聽
fileMover.setNewfilename(sServerFileName);//設置服務器上的文件名
upBean.store(mrequest, "attach");//上傳
out.println("file path is "+sPath+"/"+sServerFileName);
}

%>


Demo注意事項:cos.jar,uploadbean.jar,filemover.jar這幾個包必須有。
必備下載地址:
UploadBean1.5:http://wcarchive.cdrom.com/pub/simtelnet/winnt/java/uploadbean1_5.zip
FileMover1.3:http://www.javazoom.net/jzservlets/uploadbean/addons/filemover1.3.zip
參考下載地址:
ChinesUpload例子:http://www.javazoom.net/jzservlets/uploadbean/addons/ChineseUpload.zip
參考了fbysss的一篇文章
2. org.apache.struts.upload.FormFile
Struts1.1的org.apache.struts.upload.FormFile類。很方便,不用自己寫。也不用寫一個jsp調用jspsmartupload就可以搞定。


選擇上傳文件頁面:selfile.jsp


--------------------------------------------------------------------------------
<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html"%>
<html:html>
<html:form action="/uploadsAction.do" enctype="multipart/form-data">
<html:file property="theFile"/>
<html:submit/>
</html:form>
</html:html>

--------------------------------------------------------------------------------
UpLoadAction.java
--------------------------------------------------------------------------------
import java.io.*;
import javax.servlet.http.*;
import org.apache.struts.action.*;
import org.apache.struts.upload.FormFile;

/** *//**
* <p>Title:UpLoadAction</p>
* <p>Description: QRRSMMS </p>
* <p>Copyright: Copyright (c) 2004 jiahansoft</p>
* <p>Company: jiahansoft</p>
* @author wanghw
* @version 1.0
*/

public class UpLoadAction extends Action {
public ActionForward execute(ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response)
throws Exception {
if (form instanceof uploadsForm) {//如果form是uploadsForm
String encoding = request.getCharacterEncoding();
if ((encoding != null) && (encoding.equalsIgnoreCase("utf-8")))
{
response.setContentType("text/html; charset=gb2312");//如果沒有指定編碼,編碼格式為gb2312
}
UpLoadForm theForm = (UpLoadForm ) form;
FormFile file = theForm.getTheFile();//取得上傳的文件
try {
InputStream stream = file.getInputStream();//把文件讀入
String filePath = request.getRealPath("/");//取當前系統路徑
ByteArrayOutputStream baos = new ByteArrayOutputStream();
OutputStream bos = new FileOutputStream(filePath + "/" +
file.getFileName());//建立一個上傳文件的輸出流

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