网络编程 URL

package netTest;

import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;

public class URLConnection {
    public static void main(String[] args) throws IOException {
        URL url = new URL("http://localhost:8080/myweb/demo.html");
        // 内部帮忙做连接 不用再写socket了，而且是带着协议封装的。此时在应用层
        java.net.URLConnection conn = url.openConnection();
        //.out.println(conn);
        //socket 的inputStream 流
        InputStream in = conn.getInputStream();
        byte[] buf = new byte[1024];
        int len = in.read(buf);
        System.out.println(new String(buf,0,len));
    }
}