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() + 
                 "</b> already exists!";
           return msg;
       }
       if (!dir.exists()) {
           boolean result = dir.mkdirs();
           if (result == false) {
               msg = "error:<br>create directory <b>" + 
                     dir.getabsolutepath() + "</b> failed!";
               return msg;
           }
           return msg;
       } else {
       }
       return msg;
   }
 
   /**
    * get current datetime used to name a file uploaded
    * @return
    */
   private string getcurdatetime(){
       simpledateformat df = new simpledateformat("yymmddhhmmss");
       return df.format(new date());
   }
 
   /**
    * upload files
    * @return
    */
   public string[] uploadfile() {
       string msg = "";
       string img = null;
  
       // the final filename of the file uploaded
       string sfinalname = "";
  
       diskfileupload fu = new diskfileupload();
 
       // maximum size in byte that permitted to upload
       fu.setsizemax(51200);
 
       // maximum size in byte that will be stored in memory
       fu.setsizethreshold(4096);
 
       // the tempory path that the file(s) will be stored 
       // when greater than getsizethreshold()
       fu.setrepositorypath(tmpdir);
 
       // begin read information of upload
       list fileitems = null;
       try {
           fileitems = fu.parserequest(request);
       } catch (fileuploadexception e) {
           system.err.println("upload file failed!");
       }
       // process each file uploaded
       iterator iter = fileitems.iterator();
 
       // root dir to store file uploaded
       string uproot = updir;
  
       // arraylist used to save uploaded file name
       arraylist uploadedfiles = new arraylist();
  
       string filepath = updir;
       string opmsg = mkdir(filepath);
       if (opmsg == null) {
           while (iter.hasnext()) {
               fileitem item = (fileitem) iter.next();
         
               // ignore the other type of form field(s) except file
               if (!item.isformfield()) {
                   string name = item.getname();
                   long size = item.getsize();
                   if ((name == null || name.equals("")) && size == 0) {
                       continue;
                   }
                   name = name.replace('//','/');
                   file fullfile = new file(name); 

                   // get the extension

                   string sextension = fullfile.getname().substring(
                          fullfile.getname().lastindexof("."), 
                          fullfile.getname().length());            
                   // generate the new filename
                   string snewfilename = getcurdatetime() + sextension;
          
                   // set the final filename to snewfilename
                   sfinalname = snewfilename;
     
                   // create the file with the generated name 
                   file savedfile = new file(filepath, snewfilename);
          
                   // if the file already exist, assign a new name to it
                   for (int k = 0; savedfile.exists(); k++) {
                       // get the file name from the variable
                       string stmpfilename = snewfilename;    
         
                       // get the file name except the extension

                       string sfilename = snewfilename.substring(0, 
                                          snewfilename.lastindexof("."));    
         
                       // combine a new file name

                       savedfile = new file(filepath, sfilename + k + sextension);    
         
                       // get the new generated file name as the final filename
                       sfinalname = sfilename + k + sextension;   
                   }
                   try {
                       item.write(savedfile);
                   } catch (exception e1) {
                       system.err.println("upload file failed!");
                   }
                   uploadedfiles.add(sfinalname);
               }
           }
       }
       string suploadedfilenames[] = new string[uploadedfiles.size()];
       uploadedfiles.toarray(suploadedfilenames);
       return suploadedfilenames;
     }  
 }

<%@ page pageencoding="gbk"%><%@ page contenttype="text/html;charset=gbk"%><jsp:usebean id="up" class="com.esurfer.common.uploadfile" scope="page"/><%
 string contextpath     = getservletcontext().getrealpath("/"); string uploadtmppath   = (contextpath + "tmp").replace('//', '/'); string uploadrootpath  = (contextpath + "upload").replace('//', '/'); string saction = request.getparameter("operate"); if (saction == null) saction = ""; if (saction.equals("upload")) {     up.settmpdir(uploadtmppath);     up.setupdir(uploadrootpath);     up.setrequest(request);     string[] suploadfilenames = up.uploadfile();     for (int i = 0; i < suploadfilenames.length ; i++ ) {         out.println(suploadfilenames[i]);     } }%><html><head><title>upload</title></head><body><center><h1>upload file test</h1><form name="uploadform" method="post" action="?operate=upload" 
      enctype="multipart/form-data"> file 1:<input name="file1" size="40" type="file"><br /> file 2:<input name="file2" size="40" type="file"><br /> file 3:<input name="file3" size="40" type="file"><br /> <input name="upload" type="submit" value="upload" /></form></center></body></html>