import?javax.servlet.*;
import?javax.servlet.http.*;
import?java.io.*;
import?java.util.*;

import?org.apache.commons.fileupload.FileItem;??
import?org.apache.commons.fileupload.FileUploadException;??
import?org.apache.commons.fileupload.disk.DiskFileItemFactory;??
import?org.apache.commons.fileupload.servlet.ServletFileUpload;??
/**
文件上傳
步驟:
（1）?
*/
public?class?ProcessUpload?extends?HttpServlet
{
	public?void?doPost（HttpServletRequest?request?HttpServletResponse?response）?throws?ServletException?IOException
	{
		/**/
		System.out.println（“I?am?a?serlvet?to?process?upload!!!“）;
		
	
		request.setCharacterEncoding（?“UTF-8“?）;	//?從request中取時?以UTF-8編碼解析

		//?工廠?
		DiskFileItemFactory?diskFileItemFactory?=?new?DiskFileItemFactory（）;

		//?獲取上傳文件存放的?目錄??無則創建
		String?path?=?request.getRealPath（?“/upload“?）;
		System.out.println（“path?:?“?+?path）;

		new?java.io.File（?path?）.mkdir（）;
????????/**?
?????????*?原理?它是先存到?暫時存儲室，然后在真正寫到?對應目錄的硬盤上，??
?????????*?按理來說?當上傳一個文件時，其實是上傳了兩份，第一個是以?.tem?格式的??
?????????*?然后再將其真正寫到?對應目錄的硬盤上?
?????????*/??
		diskFileItemFactory.setRepository（?new?File（?path?）?）;
????????//設置?緩存的大小，當上傳文件的容量超過該緩存時，直接放到?暫時存儲室??
????????diskFileItemFactory.setSizeThreshold（?1024*1024?）;
????????
		

????????ServletFileUpload?upload?=?new?ServletFileUpload（diskFileItemFactory）;?
????????try
????????{
????????????//?可上傳多個文件
????????????@SuppressWarnings（“unchecked“）
			List?list?=?（List）?upload.parseRequest（?request?）;
????????????for?（FileItem?item?:?list?）
????????????{
????????????????//?獲取?提交表單的?屬性名
????????????????String?name?=?item.getFieldName（）;

????????????????//?字符串類?屬性
????????????????if?（?item.isFormField（）?）
????????????????{
????????????????????String?value?=?item.getString（）;
????????????????????System.out.println（name?+?“=“?+?value）;
????????????????}?
????????????????//?二進制類
????????????????else?
????????????????{
????????????????????//?獲取上傳文件的名字???????????????????
????????????????????String?value?=?item.getName（）;?//?1獲取路徑????????????????????
????????????????????int?start?=?value.lastIndexOf（?“\\“?）;//?2索引到最后一個反斜杠
????????????????????String?filename?=?value.substring（?start+1?）;//3?截取（+1是去掉反斜杠）?

????????????????????System.out.println（?name?+?“=“?+?value?）;

????????????????????File?file?=?null;
????????????????????do?{??
????????????????????????//?生成文件名
????????????????????????start?=?filename.lastIndexOf（?“.“?）;????//?索引到最后一個點
????????????????????????filename?=?filename.substring（?0?start?）????//?不含擴展名的文件
????????????????????????????????????+?UUID.randomUUID（）.toString（）??//?隨機數
????????????????????????????????????+?filename.substring（?start?）;??//?擴展名
????????????????????????file?=?new?File（path?filename）;??
????????????????????}?while?（file.exists（））;??

????????????????????System.out.println（?“filename=“?+?filename?）;

????????????????????//?寫到磁盤上去
????????????????????item.write（?file?）;

??????????????????

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2014-03-28?10:13??uploads\
?????文件?????????529??2014-03-28?10:34??uploads\.classpath
?????目錄???????????0??2014-03-28?10:34??uploads\.myeclipse\
?????文件?????????294??2014-03-28?10:34??uploads\.mymetadata
?????文件????????1750??2014-03-28?10:34??uploads\.project
?????目錄???????????0??2014-03-28?10:13??uploads\.settings\
?????文件?????????500??2014-03-28?10:34??uploads\.settings\.jsdtscope
?????文件?????????395??2014-03-28?10:34??uploads\.settings\org.eclipse.jdt.core.prefs
?????文件?????????459??2014-03-28?10:34??uploads\.settings\org.eclipse.wst.common.component
?????文件?????????252??2014-03-28?10:34??uploads\.settings\org.eclipse.wst.common.project.facet.core.xml
?????文件??????????49??2014-03-28?10:34??uploads\.settings\org.eclipse.wst.jsdt.ui.superType.container
?????文件???????????6??2014-03-28?10:34??uploads\.settings\org.eclipse.wst.jsdt.ui.superType.name
?????目錄???????????0??2014-03-28?10:13??uploads\WebRoot\
?????目錄???????????0??2014-03-28?10:13??uploads\WebRoot\meta-INF\
?????文件??????????36??2014-03-28?10:34??uploads\WebRoot\meta-INF\MANIFEST.MF
?????目錄???????????0??2014-03-28?10:13??uploads\WebRoot\WEB-INF\
?????目錄???????????0??2014-03-28?10:13??uploads\WebRoot\WEB-INF\classes\
?????文件????????3795??2014-03-28?10:34??uploads\WebRoot\WEB-INF\classes\ProcessUpload.class
?????目錄???????????0??2014-03-28?10:13??uploads\WebRoot\WEB-INF\lib\
?????文件???????59590??2014-03-28?10:34??uploads\WebRoot\WEB-INF\lib\commons-fileupload-1.2.2.jar
?????文件??????185140??2014-03-28?10:34??uploads\WebRoot\WEB-INF\lib\commons-io-2.4.jar
?????文件?????????712??2014-03-28?10:34??uploads\WebRoot\WEB-INF\web.xml
?????目錄???????????0??2014-03-28?10:13??uploads\WebRoot\css\
?????文件????????2543??2014-03-28?10:34??uploads\WebRoot\css\uploadify.css
?????目錄???????????0??2014-03-28?10:13??uploads\WebRoot\img\
?????文件????????2960??2014-03-28?10:34??uploads\WebRoot\img\uploadify-cancel.png
?????文件????????4641??2014-03-28?10:34??uploads\WebRoot\index.html
?????目錄???????????0??2014-03-28?10:13??uploads\WebRoot\js\
?????文件??????268381??2014-03-28?10:34??uploads\WebRoot\js\jquery-1.9.1.js
?????文件???????61153??2014-03-28?10:34??uploads\WebRoot\js\jquery.uploadify.min.js
?????文件???????12767??2014-03-28?10:34??uploads\WebRoot\js\uploadify.swf
............此處省略3個文件信息