老话题，JavaBean实现多文件上传

在网上看到许多上传文件的例子，可是都是jsp程序，每碰到需要文件上传的地方就要复制这段上传代码并做相应修改，维护起来极不方便。为了增强代码的可重用性，我将这段通用的上传程序写成了javaBean，请大家多提意见。

首先， 下载 commons-fileupload-1.0.zip 和 commons-beanutils-1.7.0.zip,

http://apache.freelamp.com/jakarta/commons/fileupload/binaries/commons-fileupload-1.0.zip
http://apache.freelamp.com/jakarta/commons/beanutils/binaries/commons-beanutils-1.7.0.zip

解压缩得到 commons-fileupload-1.0-beta-1.jar 和commons-beanutils.jar, 并将两个包放到 "YourWebApp/WEB-INF/lib"文件夹下。

UploadFile.java

package com.esurfer.common;
import javax.servlet.http.HttpServletRequest;
import java.util.*;
import java.text.SimpleDateFormat;
import java.io.*;
import org.apache.commons.fileupload.*;
public class UploadFile {
   PRivate String tmpdir;
   private String updir;
   private HttpServletRequest request;
   
   public HttpServletRequest getRequest() {
　     return request;
   }
   public void setRequest(HttpServletRequest request) {
　     this.request = request;
   }
 
 
   public String getTmpdir() {
　     return tmpdir;
   }
   public void setTmpdir(String string) {
　     tmpdir = string;
   } 
 
 
   public String getUpdir() {
　     return updir;
   }
　 public void setUpdir(String string) {
　     updir = string;
   }
 
   /**
    * Create Directory with the name 'path'
    * @param path
    * @return
    */ 
   private String MkDir(String path) {
       String msg = null;
　     java.io.File dir;
　     // Create new file object
　     dir = new java.io.File(path);
　     if (dir == null) {
　         msg = "Error:<BR>Can't create empty directory!";
　         return msg;
　     }
　     if (dir.isFile()) {
　         msg = "Error:<BR>File name <B>" + dir.getAbsolutePath() +