网络编程，下载视频图片

蔚落 2022-07-24 11:08 190阅读 0赞

import java.io.BufferedInputStream;
    import java.io.BufferedOutputStream;
    import java.io.DataInputStream;
    import java.io.FileOutputStream;
    import java.io.IOException;
    import java.io.InputStream;
    import java.net.HttpURLConnection;
    import java.net.MalformedURLException;
    import java.net.URL;
    import java.nio.channels.ReadableByteChannel;
    
    import javax.net.ssl.HttpsURLConnection;
    
    
    public class NetWork {
    	 static NetWork   net ;
    	/**
    	 * @param args
    	 * @throws Exception 
    	 */
    	public static void main(String[] args) throws Exception {
             net = new NetWork();
    		//需要下载的URL
    		String photoUrl = "http://h.hiphotos.baidu.com/image/pic/item/b3b7d0a20cf431adc4b317334936acaf2edd9854.jpg";
    		// 截取最后/后的字符串
    		String fileName = photoUrl.substring(photoUrl.lastIndexOf("/"));
    		//图片保存路径
    		String filePath = "D:";
    		/* 调用函数，并且进行传参 */
    		boolean flag = net.saveUrlAs(photoUrl, filePath + fileName);
    		System.out.println("Run ok!\n Get URL file " + flag);
    		System.out.println(filePath);
    		System.out.println(fileName);
    	}
    	public static boolean saveUrlAs(String fileUrl, String savePath) throws IOException/* fileUrl网络资源地址 */
    	{
    		 //首先我们要获得url的链接，我们要从哪里下载图片，这个图片的地址在哪里！
    		 URL  url = new URL(fileUrl);
    			/* 此为联系获得网络资源的固定格式用法，以便后面的het变量获得url截取网络资源的输入流 */
    		 HttpURLConnection het =(HttpURLConnection) url.openConnection();
    		  //getInputStream()方法可以获得网络连接输入，同时返回一个InputStream实例
    		 DataInputStream in = new DataInputStream(het.getInputStream());
    		 BufferedOutputStream    bis = new BufferedOutputStream(new FileOutputStream(savePath));
    		byte[]  buff = new byte[4096];
    		int count;
    		while ((count=in.read(buff))>0) {
    		         bis.write(buff, 0, count);
    		         return true;
    		}
    		bis.close();
    		in.close();
    		het.disconnect();
    		return false;
    	}
    	
    }