URL类

URL 是Uniform Resource Location的缩写（统一资源定位符） 是internet上用来描述资源的字符串

javaSE API 中提供了URL类来封装

实例:

package netTest;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;

    /**
     * URL 类构造方法有两种  new URL（String spec）,new URL(URL context,String spec)
     * @author Administrator
     *
     */
public class TestURL {
    public static void main(String[] args) {
        try {
            URL url = new URL("http://www.xuedou.com");
            System.out.println("主机名： "+url.getHost());
            System.out.println("获取协议： "+url.getProtocol());
            System.out.println("获取端口号： "+url.getPort());
            System.out.println("获取文件: "+url.getFile());
            System.out.println("=======================================");
            BufferedReader br = new BufferedReader(new InputStreamReader(url.openStream()));
            String strLine ="";
            while(null!=(strLine=br.readLine())){
                System.out.println(strLine);
            }
        } catch (MalformedURLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        
        
    }
    
    
}