求用jsp+java实现的文件上传功能？

<%
//*******************ÏÈ´¦ÀíÎÄ¼þÉÏ´«************
boolean IS_DEBUG = true; //µ÷ÊÔ¿ª¹Ø
int count=0; //¼ÇÂ¼ÎÄ¼þµÄ¸öÊý
String[] sSrcFileName = new String[20]; //¼ÇÂ¼ÎÄ¼þµÄÔÊ¼Â·¾¶
String[] sDstFileName = new String[20]; //¼ÇÂ¼ÎÄ¼þÔÚÏµÍ³ÖÐ±£´æµÄÂ·¾¶
mySmartUpload.initialize(pageContext); //³õÊ¼»¯ÉÏ´«×é¼þ
mySmartUpload.setTotalMaxFileSize(1073741824); //ÉèÖÃÐèÒªÉÏ´«µÄÎÄ¼þ´óÐ¡Îª10M Éç¿ÆÔºÏîÄ¿
//*********************ÉÏ´«************************
    try {
    mySmartUpload.upload();
    }
    catch(Exception ex){
        throw new WCMException(WCMException.ERR_WCMEXCEPTION, "ÉÏ´«ÎÄ¼þÊ§°Ü£¡", ex);
    }

for (int i=0;i<mySmartUpload.getFiles().getCount();i++){ //´¦ÀíÉÏ´«µÄÎÄ¼þ
com.jspsmart.upload.File myFileObj = mySmartUpload.getFiles().getFile(i); //»ñÈ¡Ä¿Ç°ÎÄ¼þ¶ÔÏó
if(myFileObj.isMissing())continue; //ÅÐ¶ÏÎÄ¼þÊÇ·ñ´æÔÚ
sSrcFileName[count] = myFileObj.getFilePathName(); //¼ÇÂ¼ÎÄ¼þµÄÔÊ¼Â·¾¶
//caohui@2004-3-6 ´ÓWCM·þÎñÆ÷ÖÐ»ñÈ¡ÐèÒªÎÄ¼þÃûÒÔ¼°Â·¾¶
String sFileName = myFileObj.getFileName();
sDstFileName[count] = app.getFilesMan().getNextFilePathName(FilesMan.FLAG_UPLOAD, CMyFile.extractFileExt(sFileName));
//¼ÇÂ¼ÎÄ¼þÔÚ·þÎñÆ÷µÄÂ·¾¶
        myFileObj.saveAs(sDstFileName[count]); //±£´æÎÄ¼þ
count ++; //¼ÇÊýÆ÷¼Ó1
}

解决方案 »

免费领取超大流量手机卡，每月29元包185G流量+100分钟通话, 中国电信官方发货

使用SmartUpload，网上有，只是要稍微改一下。
findme123(飞翔的叶子) 用的就是。我有源码，就是你分太少了
*********  1:uploadform.jsp ***********<%@page contentType="text/html; charset=gb2312"%>
<html>
<META http-equiv=Content-Type content="text/html; charset=gb2312"></META>
<body>
<script language="JavaScript">

</script>
<%@ page import="chapter7.FileUtil" %>
<jsp:useBean id="list" class="chapter7.FileUtil" scope="session" />
<%String path=request.getParameter("path");
if (path==null) { path="d:/"; }%>
<form name="uploadform" method="post"
action="smartupload.jsp" ENCTYPE="multipart/form-data">
<center>
<table border="1" width="65%">
<tr>
<td colspan=2 nowrap align=center>文件上传</td>
</tr>
<tr>
<td width="15%" nowrap >上传文件名称：:</td>
<td width="50%" nowrap><input type="file"
name="uploadfile" size="20"></td>
</tr>
<tr>
<td align="center" colspan=2 >
<input type="hidden" name="path" value="<%=list.decodeString(path)%>">
<input type="button" value="上传" onclick="return checkForm();" >
   
<input type="button" value="取消" onclick="return cancelUpload();">
</td>
</tr>
</form>
</table>
</body> *********  2:smartupload.jsp ***********
<%@page contentType="text/html; charset=gb2312"%>
<html>
<META http-equiv=Content-Type content="text/html; charset=gb2312"></META>
<body>
<%@ page language="java" import="com.jspsmart.upload.*,
java.sql.*,java.util.*,java.io.* "%>
<%-- 使用SmartUpload Java Bean --%>
<jsp:useBean id="mySmartUpload" scope="page"
class="com.jspsmart.upload.SmartUpload" />
<%
//进行初始化操作
mySmartUpload.init(config);
mySmartUpload.service(request,response); //限制上传文件的类型和大小
mySmartUpload.setAllowedFilesList("bmp,txt,exe");
mySmartUpload.setTotalMaxFileSize(51200); //进行上传操作
try{
mySmartUpload.upload();
}
catch(Exception e){ %>
<font color=red>上传文件失败！</font>
<a href= "JavaScript:window.history.back();">返回</a><br>
<UI>注意事项：</UI>
<UL>你必须设定正确的文件名称！</UL>
<UL>你的文件大小必须小于50K！</UL>
<UL>你只能上传.bmp .txt .exe类型的文件！</UL>
<%return;
}
//将上传文件存盘
String path="./";
com.jspsmart.upload.File upfile=mySmartUpload.getFiles().getFile(0);
upfile.saveAs(path+upfile.getFileName());
%>
<jsp:forward page="list.jsp">
<jsp:param name="path" value="<%=path%>"/>
</jsp:forward>
</body>
</html>
*********** 3:FileUtil.java ***************package chapter7;
import java.io.*;public class FileUtil{
  private String fullPath;
  public FileUtil(){
    fullPath="c:";
  }  public FileUtil(String path){
    fullPath=path;
  }  public String getPath(){
    return fullPath;
  }  public String decodeString(String src){
    String des=null;
    if (src!=null){
      des="";
      for (int i=0;i<src.length();i++){
        if (src.charAt(i)==' '){
          des+="%20";
        }else{
          des+=src.charAt(i);
        }
      }
    }
    return des;
  }  public String addPath(String fileName){
    String result="";
    if (fullPath.charAt(fullPath.length()-1)=='\\'){
      result=fullPath+fileName;
    }else{
      result=fullPath+'\\'+fileName;
    }
    return decodeString(result);
  }  public void setPath(String path){
      fullPath=path;
  }  public String dirUp(String path){
    String result="";
    File dir=new File(path);
    result=dir.getParent();
    return decodeString(result);
  }  public boolean copyFile(String fileName){
    return true;
  }  public boolean pasteFile(String fileName){
    return true;
  }  public boolean cutFile(String fileName){
    return true;
  }  public boolean deleteFile(String path){
    try{
      File file=new File(path);
      return file.delete();
    }catch(Exception e){
      e.printStackTrace();
      return false;
    }
  }  public boolean newDir(String dirName){
    try{
      File file=new File(fullPath+'\\'+dirName);
      return file.mkdirs();
    }catch(Exception e){
      e.printStackTrace();
      return false;
    }
  }  public boolean newFile(String fileName){
    try{
      File file = new File(fullPath+'\\'+fileName);
      return file.createNewFile();
    } catch (IOException e) {
      e.printStackTrace();
      return false;
    }
  }  public static File[] listRoot(){
    return File.listRoots();
  }  public File[] listFiles() {
    File dir=new File(fullPath);
   String[] ss = dir.list();
   if (ss == null)
    return null;
    int n = ss.length;
   File[] fs = new File[n];
  for(int i = 0; i < n; i++) {
    fs[i] = new File(dir.getPath(), ss[i]);
   }
  return fs;
  }/*  public static void main(String[] args){
    try{
    File[] list=listFiles(new File("c:"));
    for (int i=0;i<list.length;i++){
      if (list[i].isDirectory()){
        System.out.print("<"+list[i].getName()+">");
        Date date=new Date(list[i].lastModified());
        DateFormat format=DateFormat.getDateInstance();
        System.out.println(format.format(date));
      }else{
        System.out.println(list[i].getName()+"--"+list[i].length());
      }
    }
    System.out.println("hehe");
    }catch(Exception e){
      e.printStackTrace();
    }
  }*/
}**************** 4: MyUpload.java ****************
package chapter7;import java.io.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class MyUpload
{
    private ServletRequest request;
    private ServletResponse response;
    private ServletConfig config;    ServletInputStream DATA;
    int FormSize;
    File upfile;
    FileOutputStream os;
    DataInputStream is;
    String filename;
    byte[] b;
    byte t;
    boolean flag=false;    public MyUpload (){}public void initialize(ServletConfig config,HttpServletRequest request,HttpServletResponse response) throws IOException{
this.request=request;
this.response=response;
this.config=config;
DATA = request.getInputStream();
FormSize=request.getContentLength();
}
public boolean setFilename(String s){
try{
File f1=new File(s);
os=new FileOutputStream(f1);
}catch(IOException e){
return(false);
}
return true;
}public void getByte(){
int i=0;
try{
is=new DataInputStream(DATA);
b=new byte[FormSize];while (true){
try{
t=is.readByte();
b[i]=t;
i++;
}catch(EOFException e){
break;
}
}
is.close();
}catch(IOException e){}
}public boolean save(){
int i=0,start1=0,start2=0;
String temp="";
if (!flag){
getByte();
flag=true;
}
try{
temp=new String(b,"ISO8859_1");
}
catch(UnsupportedEncodingException e){
return false;
} start1=temp.indexOf("image/");
temp=temp.substring(start1);

start1=temp.indexOf("\r\n\r\n");

temp=temp.substring(start1+4);
start2=temp.indexOf(";\r\n");
if (start2!=-1){
temp=temp.substring(0,start2);
}
try{
byte[] img=temp.getBytes("ISO8859_1");
for (i=0;i<img.length;i++){
os.write(img[i]);
}
os.close();
}
catch(IOException e){
return false;
}
return true;
}
}*********** 5: ************
下载 com.jspsmart 复制到 \WEB-INF\classes\com