最近做个新功能，需要用到这个功能，测试无误，发上来备忘 
package com.xxx.utility;
/** *//*******************************************************************************
* <p>Title: xxx</p> * <p>Description: xxx</p> * <p>Copyright: Copyright (c) 2006 DavidHsing All Rights Reserved</p> * <p>Company: xxx</p> * <p>WebSite: http://blog.csdn.net/DavidHsing</p> * * @author : DavidHsing <DavidHsing(At)163.com> * @version : 1.00 * @date : 2007-08-28 * @direction: 下载 HTTP 网络资源保存到本地
******************************************************************************/import java.io.*;import java.net.*;import java.util.*;//******************************************************************************public class HttpDownload...{ //========================================================================== //public HttpDownload() {} //========================================================================== private Vector vRemoteHttpURL = new Vector(); private Vector vLocalSaveFile = new Vector(); //==========================================================================
/** *//** * 设置代理服务器 * @param String * @param String
*/ public void setProxy(String sProxyHost, String sProxyPort) ...{ if (sProxyHost != null && !sProxyHost.trim().equals("")) ...{ if (sProxyPort == null || sProxyPort.trim().equals("")) ...{ sProxyPort = "80"; } System.getProperties().put("proxySet", "true"); System.getProperties().put("proxyHost", sProxyHost); System.getProperties().put("proxyPort", sProxyPort); } } //========================================================================== /** *//** * 添加一个下载任务 * @param String * @param String * @return boolean */ public boolean addOneTask(String sRemoteHttpURL, String sLocalSaveFile) ...{ if (sRemoteHttpURL == null || sRemoteHttpURL.trim().equals("") || !sRemoteHttpURL.trim().substring(0, 7).equalsIgnoreCase("http://")) ...{ System.out.println(" @> HttpDownload.addOneTask() : 源地址有误，不是一个有效的 http 地址！"); return false; } else ...{ if (sLocalSaveFile == null || sLocalSaveFile.trim().equals("")) ...{ sLocalSaveFile = "./" + sRemoteHttpURL.substring(sRemoteHttpURL.lastIndexOf("/") + 1); } vRemoteHttpURL.add(sRemoteHttpURL); vLocalSaveFile.add(sLocalSaveFile); } return true; } //========================================================================== /** *//** * 清除下载列表 */ public void clearAllTasks() ...{ vRemoteHttpURL.clear(); vLocalSaveFile.clear(); } //========================================================================== /** *//** * 根据列表下载资源 * @return boolean */ public boolean downLoadByList() ...{ for (int i = 0; i < vRemoteHttpURL.size(); i++) ...{ String sRemoteHttpURL = (String)vRemoteHttpURL.get(i); String sLocalSaveFile = (String)vLocalSaveFile.get(i); if (!saveToFile(sRemoteHttpURL, sLocalSaveFile)) ...{ System.out.println(" @> HttpDownload.downLoadByList() : 下载远程资源时出现异常！"); //return false; } } return true; } //========================================================================== /** *//** * 将 HTTP 资源保存为文件 * @param String * @param String * @return boolean */ private boolean saveToFile(String sRemoteHttpURL, String sLocalSaveFile) ...{ if (sRemoteHttpURL == null || sRemoteHttpURL.trim().equals("")) ...{ System.out.println(" @> HttpDownload.saveToFile() : 要下载的远程资源地址不能为空！"); return false; } try ...{ URL tURL = new URL(sRemoteHttpURL); HttpURLConnection tHttpURLConnection = (HttpURLConnection)tURL.openConnection(); tHttpURLConnection.connect(); BufferedInputStream tBufferedInputStream = new BufferedInputStream(tHttpURLConnection.getInputStream()); FileOutputStream tFileOutputStream = new FileOutputStream(sLocalSaveFile); int nBufferSize = 1024 * 5; byte[] bufContent = new byte[nBufferSize]; int nContentSize = 0; while ((nContentSize = tBufferedInputStream.read(bufContent)) != -1) ...{ tFileOutputStream.write(bufContent, 0, nContentSize); } tFileOutputStream.close(); tBufferedInputStream.close(); tHttpURLConnection.disconnect(); tURL = null