networking2.java

一个功能强大的Java多线程下载器 欢迎大家的光临 促进大家的学习交流 希望对大家有点帮助

package cc;

import java.applet.*;
import java.io.*;
import java.net.*;

public class Networking2 {
	public static void main(String[] args) {
		try {
			//URL url = new URL(new Constants().geturl());
			URL url = new URL("http://www.daqiancn.com/images/解脱.MP3  ");
		//	URL url2 = new URL("http://www.sjtu.edu.cn/down.zip");
		//	HttpURLConnection httpConnection = (HttpURLConnection)url2.openConnection();
//			设置User-Agent
		//	httpConnection.setRequestProperty("User-Agent","NetFox");
//			设置断点续传的开始位置
		//	httpConnection.setRequestProperty("RANGE","bytes=2000070");
//			获得输入流
		//	InputStream input1 = httpConnection.getInputStream();

			
			//URLConnection con = url2.openConnection();//.connect();
			
			HttpURLConnection con=(HttpURLConnection) url.openConnection();
			con.connect();
			float filelength=con.getContentLength();
			float a=filelength/(1024*1024);
		//	final GetMethod get = new GetMethod(url);
		//	long size = get.getResponseContentLength();

			System.out.println(a+"M");
			
			
			BufferedInputStream input = new BufferedInputStream(con.getInputStream());

			File f = new File("d:/jifdetuo.mp3");
			//File f = new File(new Constants().getpath());
			//FileOutputStream output = new FileOutputStream(f);
			RandomAccessFile out=new RandomAccessFile(f,"rw");
			
			//BufferedOutputStream boutput = new BufferedOutputStream(new FileOutputStream(f));
			int data = 0;
			/*
			 * while(input.read()!=-1){
				boutput.write((byte) data);
			}
				*/
			while (true) {
				data = input.read();
				if (data == -1)
					{
					System.out.println("文件下载完成");
					break;
					}
				//System.out.print((char)data);
				out.write((byte) data);
			}
		
		//	System.out.println("文件下载完成");
			//out.flush();

		} catch (Exception e) {
			System.out.println(e.toString());
		}

	}
}