前言

提示：以下是本篇文章正文内容，下面案例可供参考

一、利用URL查看网页源代码

package http;import java.io.IOException;import java.io.InputStream;import java.net.MalformedURLException;import java.net.URL;import java.util.Scanner;public class ttp {
       public static void main(String[] args) {
        Look look=new Look();     Scanner reader=new Scanner(System.in);     String source=reader.nextLine();        URL url= null;        Thread readURL=null;        try {
               url = new URL(source);            look.setUrl(url);            readURL=new Thread(look);        } catch (MalformedURLException e) {
               e.printStackTrace();        }        readURL=new Thread(look);        readURL.start();    }}class Look implements Runnable{
       URL url;    public void setUrl(URL url) {
           this.url = url;    }    @Override    public void run() {
           try {
               InputStream in= url.openStream();            byte []bytes=new byte[1024];            int len=0;            while((len=in.read(bytes))!=-1){
                   System.out.println(new String(bytes,0,len));            }        } catch (IOException e) {
               e.printStackTrace();        }    }}

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