求java网络爬虫的源代码

package com.heaton.bot;import com.heaton.bot.*;import java.net.*; /** * The SpiderWorker class performs the actual work of * spidering pages. It is implemented as a thread * that is created by the spider class. * * Copyright 2001-2003 by Jeff Heaton ( http://www.jeffheaton.com) * * @author Jeff Heaton * @version 1.2 */public class SpiderWorker extends Thread { /** * The URL that this spider worker * should be downloading. */ protected String target; /** * The owner of this spider worker class, * should always be a Spider object. * This is the class that this spider * worker will send its data to. */ protected Spider owner; /** * Indicates if the spider is busy or not. * true = busy * false = idle */ protected boolean busy; /** * A descendant of the HTTP object that * this class should be using for HTTP * communication. This is usually the * HTTPSocket class. */ protected HTTP http; /** * Constructs a spider worker object. * * @param owner The owner of this object, usually * a Spider object. * @param http */ public SpiderWorker(Spider owner,HTTP http) { this.http = http; this.owner = owner; } /** * Returns true of false to indicate if * the spider is busy or idle. * * @return true = busy * false = idle */ public boolean isBusy() {<-文章出处： http://www.diybl.com/course/3_program/java/javajs/200797/69988.html