URL网络编程

package com.atguigu.java1;
 
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
 
/**
 * @author shkstart
 * @create 2019 下午 4:54
 */
public class URLTest1 {
 
    public static void main(String[] args) {
 
        HttpURLConnection urlConnection = null;
        InputStream is = null;
        FileOutputStream fos = null;
        try {
            URL url = new URL("http://localhost:8080/examples/beauty.jpg");
 
            urlConnection = (HttpURLConnection) url.openConnection();
 
            urlConnection.connect();
 
            is = urlConnection.getInputStream();
            fos = new FileOutputStream("day10\\beauty3.jpg");
 
            byte[] buffer = new byte[1024];
            int len;
            while((len = is.read(buffer)) != -1){
                fos.write(buffer,0,len);
            }
 
            System.out.println("下载完成");
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            //关闭资源
            if(is != null){
                try {
                    is.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if(fos != null){
                try {
                    fos.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if(urlConnection != null){
                urlConnection.disconnect();
            }
        }
 
    }
}