package?upload;

import?java.io.BufferedReader;
import?java.io.File;
import?java.io.FileInputStream;
import?java.io.FileReader;
import?java.io.IOException;
import?java.io.PrintWriter;
import?java.util.List;

import?javax.servlet.ServletConfig;
import?javax.servlet.ServletContext;
import?javax.servlet.ServletException;
import?javax.servlet.http.HttpServlet;
import?javax.servlet.http.HttpServletRequest;
import?javax.servlet.http.HttpServletResponse;

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?具體步驟：?1）獲得磁盤文件條目工廠?DiskFileItemFactory?要導包?2）?利用?request?獲取?真實路徑
?*?，供臨時文件存儲，和?最終文件存儲?，這兩個存儲位置可不同，也可相同?3）對?DiskFileItemFactory?對象設置一些?屬性
?*?4）高水平的API文件上傳處理?ServletFileUpload?upload?=?new?ServletFileUpload（factory）;
?*?目的是調用?parseRequest（request）方法?獲得?FileItem?集合list?，
?*?
?*?5）在?FileItem?對象中?獲取信息，?遍歷，?判斷?表單提交過來的信息?是否是?普通文本信息?另做處理?6）?第一種.?用第三方?提供的
?*?item.write（?new?File（pathfilename）?）;?直接寫到磁盤上?第二種.?手動處理
?*?
?*/
public?class?UploadProcessorServlet?extends?HttpServlet?{
	private?static?final?long?serialVersionUID?=?1L;
	//?保存文件的目錄
	private?static?String?PATH_FOLDER?=?“/“;
	//?存放臨時文件的目錄
	private?static?String?TEMP_FOLDER?=?“/“;
	//存放返回字節的Json目錄
	private?static?String?JSON_FOLDER?=“/“;
	
	
	@Override
	public?void?init（ServletConfig?config）?throws?ServletException?{
		ServletContext?servletCtx?=?config.getServletContext（）;
		//?初始化路徑
		//?保存文件的目錄
		PATH_FOLDER?=?servletCtx.getRealPath（“/upload“）;
		//?存放臨時文件的目錄存放xxx.tmp文件的目錄
		TEMP_FOLDER?=?servletCtx.getRealPath（“/uploadTemp“）;
		//JSON目錄
		JSON_FOLDER=servletCtx.getRealPath（“/“）;
	}

	/**
	?*?@see?HttpServlet#doGet（HttpServletRequest?request?HttpServletResponse
	?*??????response）
	?*/
	protected?void?doGet（HttpServletRequest?request
			HttpServletResponse?response）?throws?ServletException?IOException?{
		request.setCharacterEncoding（“utf-8“）;?//?設置編碼
		response.setCharacterEncoding（“utf-8“）;
		response.setContentType（“text/html;charset=UTF-8“）;
		//?獲得磁盤文件條目工廠
		DiskFileItemFactory?factory?=?new?DiskFileItemFactory（）;
		
		//?如果沒以下兩行設置的話，上傳大的?文件?會占用?很多內存，
		//?設置暫時存放的?存儲室??這個存儲室，可以和?最終存儲文件?的目錄不同
		/**
		?*?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
		?*/
		factory.setRepository（new?File（TEMP_FOLDER））;
		//?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
		factory.setSizeThreshold（1024?*?1024）;

		//?高水平的API文件上傳處理
		ServletFileUpload?upload?=?new?ServletFileUpload（factory）;
		
		try?{
			//?提交上來的信息都在這個list里面
			//?這意味著可以上傳多個文件
			//?請自行組織代碼
			List?list?=?upload.parseRequest（request）;
			//?獲取上傳的文件
			FileItem?item?=?getUploadFileItem（list）;
			//?獲取文件名
			String?filename?=?getUploadFileName（item）;

			System.out.println（“存放目錄:“?+?PATH_FOLDER）;
			System.out.println（“

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2014-07-31?21:58??JqueryFileUpload\
?????文件?????????727??2014-07-31?21:58??JqueryFileUpload\.classpath
?????文件????????1108??2014-07-31?21:58??JqueryFileUpload\.project
?????目錄???????????0??2014-07-31?21:58??JqueryFileUpload\.settings\
?????文件?????????503??2014-07-31?21:58??JqueryFileUpload\.settings\.jsdtscope
?????文件?????????364??2014-07-31?21:58??JqueryFileUpload\.settings\org.eclipse.jdt.core.prefs
?????文件?????????498??2014-07-31?21:58??JqueryFileUpload\.settings\org.eclipse.wst.common.component
?????文件?????????305??2014-07-31?21:58??JqueryFileUpload\.settings\org.eclipse.wst.common.project.facet.core.xml
?????文件??????????49??2014-07-31?21:58??JqueryFileUpload\.settings\org.eclipse.wst.jsdt.ui.superType.container
?????文件???????????6??2014-07-31?21:58??JqueryFileUpload\.settings\org.eclipse.wst.jsdt.ui.superType.name
?????文件?????????757??2014-07-31?21:58??JqueryFileUpload\.tomcatplugin
?????目錄???????????0??2014-07-31?21:58??JqueryFileUpload\WebContent\
?????文件?????????207??2014-07-31?21:58??JqueryFileUpload\WebContent\.#webclasspath
?????目錄???????????0??2014-07-31?21:58??JqueryFileUpload\WebContent\meta-INF\
?????文件??????????39??2014-07-31?21:58??JqueryFileUpload\WebContent\meta-INF\MANIFEST.MF
?????目錄???????????0??2014-07-31?21:58??JqueryFileUpload\WebContent\WEB-INF\
?????目錄???????????0??2014-07-31?21:58??JqueryFileUpload\WebContent\WEB-INF\lib\
?????文件???????68622??2014-07-31?21:58??JqueryFileUpload\WebContent\WEB-INF\lib\commons-fileupload-1.3.jar
?????文件???????83613??2014-07-31?21:58??JqueryFileUpload\WebContent\WEB-INF\lib\commons-io-1.3.1.jar
?????文件?????????730??2014-07-31?21:58??JqueryFileUpload\WebContent\WEB-INF\web.xml
?????目錄???????????0??2014-07-31?21:58??JqueryFileUpload\WebContent\css\
?????文件????????6815??2014-07-31?21:58??JqueryFileUpload\WebContent\css\blueimp-gallery.min.css
?????文件???????99967??2014-07-31?21:58??JqueryFileUpload\WebContent\css\bootstrap.min.css
?????文件?????????417??2014-07-31?21:58??JqueryFileUpload\WebContent\css\demo-ie8.css
?????文件????????1191??2014-07-31?21:58??JqueryFileUpload\WebContent\css\demo.css
?????文件?????????453??2014-07-31?21:58??JqueryFileUpload\WebContent\css\jquery.fileupload-noscript.css
?????文件?????????388??2014-07-31?21:58??JqueryFileUpload\WebContent\css\jquery.fileupload-ui-noscript.css
?????文件????????1159??2014-07-31?21:58??JqueryFileUpload\WebContent\css\jquery.fileupload-ui.css
?????文件?????????691??2014-07-31?21:58??JqueryFileUpload\WebContent\css\jquery.fileupload.css
?????文件?????????309??2014-07-31?21:58??JqueryFileUpload\WebContent\css\style.css
?????文件????????9710??2014-07-31?21:58??JqueryFileUpload\WebContent\index.html
............此處省略35個文件信息