java网络编程-- URL(网络资源下载)

package cn.usts.edu.lesson06;


import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;


public class URLDownload {
    public static void main(String[] args) throws IOException {
        URL url = new URL("https://img-home.csdnimg.cn/images/20211019040101.gif");
        HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();//打开连接,对链接进行访问;
        InputStream inputStream = urlConnection.getInputStream();
        FileOutputStream fileOutputStream = new FileOutputStream("D:\all_projects\java_projects\java_ij" +
                "\springMVC\NetWork\src\cn\usts\edu\lesson06\download.gif");
        byte[] buffer = new byte[1024];
        int len;
        while ((len=inputStream.read(buffer))!=-1){
            fileOutputStream.write(buffer,0,len);
        }
        fileOutputStream.close();
        inputStream.close();
        System.out.println("下载完成");
    }
}