java下載下傳網絡資源

package com.io;

import java.io.*;

import java.net.*;

import java.util.*;

public class HttpGet {

public final static boolean DEBUG = true;

private static int BUFFER_SIZE = 8096;

private Vector<String> vDownLoad = new Vector<String>();

private Vector<String> vFileList = new Vector<String>();

public HttpGet() {

}

public void resetList() {

vDownLoad.clear();

vFileList.clear();

}

public void addItem(String url, String filename) {

vDownLoad.add(url);

vFileList.add(filename);

}

public void downLoadByList() {

String url = null;

String filename = null;

for (int i = 0; i < vDownLoad.size(); i++) {

url = vDownLoad.get(i);

filename = vFileList.get(i);

try {

saveToFile(url, filename);

}

catch (IOException err) {

if (DEBUG) {

System.out.println("資源[" + url + "]下載下傳失敗!!!");

}

}

}

if (DEBUG) {

System.out.println("下載下傳完成!!!");

}

}

public void saveToFile(String destUrl, String fileName) throws IOException {

FileOutputStream fos = null;

BufferedInputStream bis = null;

HttpURLConnection httpUrl = null;

URL url = null;

byte[] buf = new byte[BUFFER_SIZE];

int size = 0;

url = new URL(destUrl);

httpUrl = (HttpURLConnection) url.openConnection();

//連接配接指定的資源

httpUrl.connect();

//擷取網絡輸入流

bis = new BufferedInputStream(httpUrl.getInputStream());

//建立檔案

fos = new FileOutputStream(fileName);

if (DEBUG) {

System.out.println("正在擷取連結[" + destUrl + "]的内容...\n将其儲存為檔案[" + fileName + "]");

}

//儲存檔案

while ( (size = bis.read(buf)) != -1)

fos.write(buf, 0, size);

fos.close();

bis.close();

httpUrl.disconnect();

}

public void setProxyServer(String proxy, String proxyPort) {

//設定代理伺服器

System.getProperties().put("proxySet", "true");

System.getProperties().put("proxyHost", proxy);

System.getProperties().put("proxyPort", proxyPort);

}

public static void main(String argv[]) {

HttpGet oInstance = new HttpGet();

try {

String url = "http://10.166.112.167:8080/portalapp/book_file/2358/137262358/137262367/20100826193207/file2.dmh";

oInstance.saveToFile(url,"D:/11");

//開始下載下傳

oInstance.downLoadByList();

}

catch (Exception err) {

System.out.println(err.getMessage());

}

}

}