Hadoop 系统入门+核心精讲

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package com.zzger.model;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.CountDownLatch;

import com.zzger.module.queue.UrlQueue;
import com.zzger.util.HttpUtils;
import com.zzger.util.RegexUtils;

public class WebSite {

/**
 * 站点url
 */
private String url;
   
/**
 * 需求匍匐的url队列
 */
private UrlQueue urls = new UrlQueue<>();
   
/**
 * 已匍匐过的页面url
 */
private List exitUrls = Collections.synchronizedList(new ArrayList<>());
   
private static final int TOTAL_THREADS = 12; 
   
private final CountDownLatch mStartSignal = new CountDownLatch(1); 
   
private final CountDownLatch mDoneSignal = new CountDownLatch(TOTAL_THREADS);  
   
public WebSite(String url){
    this.url = url;
    urls.offer(url);//把网站首页参加需求匍匐的队列中
}
   
public void guangDu(){
    new Thread(new Runnable() {
        @Override
        public void run() {
            paxing(HttpUtils.httpGet(url));
        }
    }).start();
}
   
public void paxing(String html){
    if(html.lastIndexOf("下一页

")<0) return ;

    String strList = html.substring(html.indexOf("
"),
            html.lastIndexOf("下一页

"));

    String url = RegexUtils.RegexString(" list = page.ybhqSection().getSections();
    for(Section section : list){
        new Thread(new Runnable() {
            @Override
            public void run() {
                mStartSignal.countDown();// 计数减一为0，工作线程真正启动详细操作  
                try {
                    mStartSignal.await();// 阻塞，等候mStartSignal计数为0运转后面的代码  
                    // 一切的工作线程都在等候同一个启动的命令  
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                DuanZi duanzi = section.select().getModel();
                System.out.println(duanzi.getTitle());
                mDoneSignal.countDown();// 完成以后计数减一  
            }
        }
        ).start();
    }
    try
    { 
        mDoneSignal.await();// 等候一切工作线程完毕  
    } 
    catch (InterruptedException e) 
    { 
        e.printStackTrace(); 
    } 
    dxcPx();//线程任务执行完后，再次获取url队列停止任务
}
public static void main(String[] args) {
    WebSite web = new WebSite("http://duanziwang.com");
    web.guangDu();
    for(int i = 0; i<10;i++){
        new Thread(new Runnable() {
            @Override
            public void run() {
                web.dxcPx();
            }
        }).start();
    }
       
}

}