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提供两份文件上传到JSP的解决方案,并附有详细的源码

发布时间:2023-07-19 14:11:50 所属栏目:教程 来源:
导读:以前用cos作文件上传,但是对于文件上传后的改名还需要借助其他的工具。

摘录如下:

在用Java开发企业器系统的使用,特别是涉及到与办公相关的软件开发的时候,文件的上传是客户经常要提到的要求.因此有 一套很
以前用cos作文件上传,但是对于文件上传后的改名还需要借助其他的工具。
 
摘录如下:
 
在用Java开发企业器系统的使用,特别是涉及到与办公相关的软件开发的时候,文件的上传是客户经常要提到的要求.因此有 一套很好文件上传的解决办法也能方便大家在这一块的开发.
 
首先申明,该文章是为了自己记录一备以后开发需要的时候,不用手忙脚乱哈哈........
 
现在在国内用的非常多的一般是两种方法解决来解决文件上传.
 
cos.jar + uploadbean.jar + filemover.jar
 
这个是用的非常普遍的,原因是因为他操作方便,是我们不必再去关注,那些文件的输入和输出流,使我们从底层的流中解脱出来.
 
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.读取表单页面sssgetdata.jsp
 
<!--
 
//==========================================================================
 
//文件:UploadBean上传实例
 
//功能:解决中文乱码,完成文件上传,并提供上传改名解决方案
 
//作者:fbysss
 
//msn:jameslastchina@hotmail.com
 
//==========================================================================
 
-->
 
<%@ 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");//设置编码格式,就不用一个个转码了。
 
FileMover fileMover = new FileMover();//你也可以使用自带的实例中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");//注意这里也要设置编码参数
 
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>");
 
//这里用来测试title参数是否正确。调试的时候,加一句if (true)return;即可。
 
files = mrequest.getFiles();
 
}
 
 
//获取修改前的文件名
 
String sOldFileName =mrequest.getParameter("oldfilename");
 
out.println("sOldFileName:"+sOldFileName);
 
String sWebRootPath = request.getRealPath("/");//得到你的web应用的根。
 
String sPath=sWebRootPath+"attach";
 
int iFileCount = 0;
 
String sServerFileName="";
 
String sLocalFileName = "";
 
//文件获取
 
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("."); //取文件名的后缀
 
String sExt = sLocalFileName.substring(ii,sLocalFileName.length());
 
//得到不重复的文件名
 
java.util.Date dt = new java.util.Date(System.currentTimeMillis());
 
SimpleDateFormat fmt = new SimpleDateFormat("yyyyMMddHHmmssSSS");
 
sServerFileName= fmt.format(dt);
 
sServerFileName =sServerFileName + sExt;
 
//如果不存在该目录,则新建一个
 
File dir =new File(sPath);
 
if (!dir.exists()){
 
dir.mkdirs();
 
}
 
upBean.setFolderstore(sPath);//设置要上传的目录
 
upBean.addUploadListener(fileMover);//增加filMover监听
 
fileMover.setNewfilename(sServerFileName);//设置服务器上的文件名
 
upBean.store(mrequest, "attach");//上传
 
out.println("file path is "+sPath+"/"+sServerFileName);
 
}
 
%>
 
 
Demo注意事项:cos.jar,uploadbean.jar,filemover.jar这几个包必须有。
 
必备下载地址:
 
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
 
参考下载地址:
 
ChinesUpload例子:http://www.javazoom.net/jzservlets/uploadbean/addons/ChineseUpload.zip
 
参考了fbysss的一篇文章
 
2. org.apache.struts.upload.FormFile
 
Struts1.1的org.apache.struts.upload.FormFile类。很方便,不用自己写。也不用写一个jsp调用jspsmartupload就可以搞定。
 
 
选择上传文件页面: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");//如果没有指定编码,编码格式为gb2312
 
}
 
UpLoadForm theForm = (UpLoadForm ) form;
 
FormFile file = theForm.getTheFile();//取得上传的文件
 
try {
 
InputStream stream = file.getInputStream();//把文件读入
 
String filePath = request.getRealPath("/");//取当前系统路径
 
ByteArrayOutputStream baos = new ByteArrayOutputStream();
 
OutputStream bos = new FileOutputStream(filePath + "/" +
 
file.getFileName());//建立一个上传文件的输出流
 
//System.out.println(filePath+"/"+file.getFileName());
 
int bytesRead = 0;
 
byte[] buffer = new byte[8192];
 
while ( (bytesRead = stream.read(buffer, 0, 8192)) != -1) {
 
bos.write(buffer, 0, bytesRead);//将文件写入服务器
 
}
 
bos.close();
 
stream.close();
 
}catch(Exception e){
 
System.err.print(e);
 
}
 
//request.setAttribute("dat",file.getFileName());
 
return mapping.findForward("display");
 
}
 
return null;
 
}
 
}
 
 
--------------------------------------------------------------------------------
 
UpLoadForm.java
 
--------------------------------------------------------------------------------
 
 
import javax.servlet.http.HttpServletRequest;
 
import org.apache.struts.action.*;
 
import org.apache.struts.upload.*;
 
/** *//**
 
* <p>Title:UpLoadForm</p>
 
* <p>Description: QRRSMMS </p>
 
* <p>Copyright: Copyright (c) 2004 jiahansoft</p>
 
* <p>Company: jiahansoft</p>
 
* @author wanghw
 
* @version 1.0
 
*/
 
public class UpLoadForm extends ActionForm {
 
public static final String ERROR_PROPERTY_MAX_LENGTH_EXCEEDED = "org.apache.struts.webapp.upload.MaxLengthExceeded";
 
protected FormFile theFile;
 
public FormFile getTheFile() {
 
return theFile;
 
}
 
public void setTheFile(FormFile theFile) {
 
this.theFile = theFile;
 
}
 
public ActionErrors validate(ActionMapping mapping, HttpServletRequest request)
 
{
 
ActionErrors errors = null;
 
//has the maximum length been exceeded?
 
Boolean maxLengthExceeded = (Boolean)
 
request.getAttribute(MultipartRequestHandler.ATTRIBUTE_MAX_LENGTH_EXCEEDED);
 
if ((maxLengthExceeded != null) && (maxLengthExceeded.booleanValue()))
 
{
 
errors = new ActionErrors();
 
errors.add(ERROR_PROPERTY_MAX_LENGTH_EXCEEDED, new ActionError("maxLengthExceeded"));
 
}
 
return errors;
 
}
 
}
 
//这是相对应的form,还有其他属性可以设置,具体可以参考struts的上传例子。
 
--------------------------------------------------------------------------------
 
struts-config.xml
 
--------------------------------------------------------------------------------
 
<?xml version="1.0" encoding="UTF-8"?>
 
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.1//EN" "http://jakarta.apache.org/struts/dtds/struts-config_1_1.dtd";>
 
<struts-config>
 
<form-beans>
 
<form-bean name="uploadsForm" type="UpLoadForm" />
 
</form-beans>
 
<action-mappings>
 
<action name="uploadsForm" type="UpLoadAction" path="/uploadsAction">
 
<forward name="display" path="/display.jsp" />
 
</action>
 
</action-mappings>
 
</struts-config>
 
<!--display.jsp就是随便写一个成功页-->
 
 

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