方法一

package com.amigo.online.provider.manager.util.video.download;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
public class VideoDownload {
	public static boolean httpDownload(String httpUrl, String saveFile) {
        // 1.下載網(wǎng)絡(luò)文件
        int byteRead;
        URL url;
        try {
            url = new URL(httpUrl);
        } catch (MalformedURLException e1) {
            e1.printStackTrace();
            return false;
        }
 
        try {
            //2.獲取鏈接
            URLConnection conn = url.openConnection();
            //3.輸入流
            InputStream inStream = conn.getInputStream();
            //3.寫入文件
            FileOutputStream fs = new FileOutputStream(saveFile);
 
            byte[] buffer = new byte[1024];
            while ((byteRead = inStream.read(buffer)) != -1) {
                fs.write(buffer, 0, byteRead);
            }
            inStream.close();
            fs.close();
            return true;
        } catch (FileNotFoundException e) {
            e.printStackTrace();
            return false;
        } catch (IOException e) {
            e.printStackTrace();
            return false;
        }
    }
	
	public static void main(String[] args) {
		System.out.println(httpDownload("http://yun.it7090.com/video/XHLaunchAd/video01.mp4","D:\\image\\22.mp4"));
	}
}

方法二

package com.amigo.online.provider.manager.util.video.download;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import org.jboss.logging.Logger;
public class VideoDownloadUtil {
	private static final Logger LOGGER = Logger.getLogger(VideoDownloadUtil.class);
	/**
     * 下載文件到本地
     *
     * @param urlString
     *          被下載的文件地址
     * @param filename
     *          本地文件名
     * @param timeout
     *          超時時間毫秒
     * @throws Exception
     *           各種異常
     */
   
	 @SuppressWarnings("finally")
	public static boolean download(String urlString, String filename,int timeout){
	        boolean ret = false;
	        File file = new File(filename);
	        try {
	            if(file.exists()){
	                ret = true;
	            }else{
	                // 構(gòu)造URL
	                URL url = new URL(urlString);
	                // 打開連接
	                HttpURLConnection con = (HttpURLConnection )url.openConnection();
	                con.setConnectTimeout(timeout);
	                con.setReadTimeout(timeout);
	                con.connect();
	                int contentLength = con.getContentLength();
	                // 輸入流
	                InputStream is = con.getInputStream();
	                // 1K的數(shù)據(jù)緩沖
	                byte[] bs = new byte[1024];
	                // 讀取到的數(shù)據(jù)長度
	                int len;
	                // 輸出的文件流
 
	                File file2=new File(file.getParent());
	                file2.mkdirs();
	                if(file.isDirectory()){
 
	                }else{
	                    file.createNewFile();//創(chuàng)建文件
	                }
	                OutputStream os = new FileOutputStream(file);
	                // 開始讀取
	                while ((len = is.read(bs)) != -1) {
	                    os.write(bs, 0, len);
	                }
	                // 完畢，關(guān)閉所有鏈接
	                os.close();
	                is.close();
	                if(contentLength != file.length()){
	                    file.delete();
	                    ret = false;
	                }else{
	                    ret = true;
	                }
	            }
	        } catch (IOException e) {
	            file.delete();
	            ret = false;
	            LOGGER.error("[VideoUtil:download]:\n" + " VIDEO URL：" + urlString + " \n NEW FILENAME:" + filename + " DOWNLOAD FAILED!! ");
	        }finally {
	            return ret;
	        }
	    }
    public static void main(String[] args) {
    	System.out.println(download("http://yun.it7090.com/video/XHLaunchAd/video01.mp4","D:\\image\\969.mp4",1000000000));
	}
  }  

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