package?servlet;

import?java.io.File;
import?java.io.IOException;
import?java.io.InputStream;
import?java.io.RandomAccessFile;
import?java.net.HttpURLConnection;
import?java.net.URL;
import?java.util.HashMap;
import?java.util.Map;

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

public?class?DeliverServlet?extends?HttpServlet?{
	private?static?final?long?serialVersionUID?=?-247051569889918673L;
	private?static?final?String?base_URL?=?“http://www.3310.com/plus/apksoftajax.php“;
	public?static?Map?downloaders?=?new?HashMap（）;

	@Override
	public?void?init（ServletConfig?config）?throws?ServletException?{
		super.init（）;
	}

	@Override
	protected?void?doPost（HttpServletRequest?request?HttpServletResponse?response）?throws?ServletException?IOException?{
		doGet（request?response）;
	}

	@Override
	protected?void?doGet（HttpServletRequest?request?HttpServletResponse?response）?throws?ServletException?IOException?{
		response.setCharacterEncoding（“UTF-8“）;
		response.setContentType（“text/xml“）;
		final?String?md5?=?request.getParameter（“md5“）;
		final?String?filePath?=?request.getParameter（“filePath“）;
		final?String?fileName?=?filePath.substring（filePath.lastIndexOf（“/“）?+?1?filePath.length（））;
		final?String?localPath?=?request.getParameter（“localPath“）;

		if?（!StringUtil.isNullOrBlank（md5）?&&?!StringUtil.isNullOrBlank（filePath）?&&?!StringUtil.isNullOrBlank（localPath））?{
			ThreadUtils.execute（new?Runnable（）?{
				@Override
				public?void?run（）?{
					//?TODO?Auto-generated?method?stub
					if?（downloaders.get（md5）?==?null）?{
						downloaders.put（md5?fileName）;
						downloadFile（md5?filePath?fileName?localPath）;
					}
				}
			}）;

		}?else?{
			HttpRequest.sendGet（base_URL?“md5=“?+?md5?+?“&isSuc=0&file=“?+?fileName）;
		}
	}

	private?void?deleteFile（File?filename）?{
		if?（filename.exists（））?{?//?判斷文件是否存在
			if?（filename.isFile（））?{?//?判斷是否是文件
				filename.delete（）;
			}
		}
	}

	public?void?downloadFile（String?md5?String?filePath?String?fileName?String?localPath）?{
		int?nStartPos?=?0;
		int?nRead?=?0;
		try?{
			URL?url?=?new?URL（filePath）;
			//?打開連接
			HttpURLConnection?httpConnection?=?（HttpURLConnection）?url.openConnection（）;
			//?獲得文件長度
			long?nEndPos?=?getFileSize（filePath）;
			RandomAccessFile?oSavedFile?=?new?RandomAccessFile（localPath?+?“\\“?+?fileName?“rw“）;
			httpConnection.setRequestProperty（“User-Agent“?“Internet?Explorer“）;
			String?sProperty?=?“bytes=“?+?nStartPos?+?“-“;
			//?告訴服務器這個文件從nStartPos字節開始傳
			httpConnection.setRequestProperty（“RANGE“?sProperty）;
			InputStream?input?=?httpConnection.getInputStream（）;
			byte[]?b?=?new?byte[1024];
			//?讀取網絡文件寫入指定的文件中
			while?（（nRead?=?input.read（b?0?1024））?>?0?&&?nStartPos?				oSav

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件????????529??2015-03-16?15:00??test\.classpath

?????文件????????285??2015-03-16?15:00??test\.mymetadata

?????文件???????1747??2015-03-16?15:40??test\.project

?????文件????????500??2015-03-16?15:00??test\.settings\.jsdtscope

?????文件?????????78??2015-03-16?15:00??test\.settings\com.genuitec.eclipse.ws.prefs

?????文件?????????57??2015-03-16?15:02??test\.settings\org.eclipse.core.resources.prefs

?????文件????????364??2015-03-16?15:00??test\.settings\org.eclipse.jdt.core.prefs

?????文件????????450??2015-03-16?15:00??test\.settings\org.eclipse.wst.common.component

?????文件????????252??2015-03-16?15:00??test\.settings\org.eclipse.wst.common.project.facet.core.xml

?????文件?????????49??2015-03-16?15:00??test\.settings\org.eclipse.wst.jsdt.ui.superType.container

?????文件??????????6??2015-03-16?15:00??test\.settings\org.eclipse.wst.jsdt.ui.superType.name

?????文件???????4764??2015-03-16?16:50??test\src\servlet\DeliverServlet.java

?????文件???????3642??2015-03-16?16:14??test\src\servlet\HttpRequest.java

?????文件???????1757??2015-03-16?15:58??test\src\servlet\MD5Helper.java

?????文件??????10842??2015-03-16?15:15??test\src\servlet\StringUtil.java

?????文件???????2137??2015-03-16?15:58??test\src\servlet\TestDownFile.java

?????文件???????1143??2015-03-16?15:13??test\src\servlet\ThreadUtils.java

?????文件????????834??2015-03-16?15:00??test\WebRoot\index.jsp

?????文件?????????36??2015-03-16?15:00??test\WebRoot\meta-INF\MANIFEST.MF

?????文件???????1285??2015-03-16?16:50??test\WebRoot\WEB-INF\classes\servlet\DeliverServlet$1.class

?????文件???????5795??2015-03-16?16:50??test\WebRoot\WEB-INF\classes\servlet\DeliverServlet.class

?????文件???????4108??2015-03-16?16:14??test\WebRoot\WEB-INF\classes\servlet\HttpRequest.class

?????文件???????2631??2015-03-16?15:58??test\WebRoot\WEB-INF\classes\servlet\MD5Helper.class

?????文件???????9993??2015-03-16?15:15??test\WebRoot\WEB-INF\classes\servlet\StringUtil.class

?????文件???????3001??2015-03-16?15:58??test\WebRoot\WEB-INF\classes\servlet\TestDownFile.class

?????文件???????1618??2015-03-16?15:13??test\WebRoot\WEB-INF\classes\servlet\ThreadUtils.class

?????文件????????643??2015-03-16?15:03??test\WebRoot\WEB-INF\web.xml

?????目錄??????????0??2015-03-16?16:51??test\WebRoot\WEB-INF\classes\servlet

?????目錄??????????0??2015-03-16?16:51??test\WebRoot\WEB-INF\classes

?????目錄??????????0??2015-03-16?15:00??test\WebRoot\WEB-INF\lib

............此處省略10個文件信息