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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 {
  
    /**
     * 站點url
     */
    private String url;
      
    /**
     * 需要爬行的url隊列
     */
    private UrlQueue<String> urls = new UrlQueue<>();
      
    /**
     * 已爬行過的頁面url
     */
    private List<String> 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);//把網站首頁加入需要爬行的隊列中
    }
      
    public void guangDu(){
        new Thread(new Runnable() {
            @Override
            public void run() {
                paxing(HttpUtils.httpGet(url));
            }
        }).start();
    }
      
    public void paxing(String html){
        if(html.lastIndexOf("下一頁</a></li></ul></div>")<0)    return ;
        String strList = html.substring(html.indexOf("<li class=\\"next-page\\">"), 
                html.lastIndexOf("下一頁</a></li></ul></div>"));
        String url = RegexUtils.RegexString("<a href=\\"(.+?)\\"", strList);
        if(url.equals("Nothing")) return ;
        urls.put(url);//把url存儲到隊列中
        paxing(HttpUtils.httpGet(url));
    }
      
    public void dxcPx(){
        Page<DuanZi> page = new Gxpage(urls.take());
        List<Section<DuanZi>> list = page.ybhqSection().getSections();
        for(Section<DuanZi> section : list){
            new Thread(new Runnable() {
                @Override
                public void run() {
                    mStartSignal.countDown();// 計數減一為0，工作線程真正啟動具體操作   
                    try {
                        mStartSignal.await();// 阻塞，等待mStartSignal計數為0運行后面的代碼   
                        // 所有的工作線程都在等待同一個啟動的命令   
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    DuanZi duanzi = section.select().getModel();
                    System.out.println(duanzi.getTitle());
                    mDoneSignal.countDown();// 完成以后計數減一   
                }
            }
            ).start();
        }
        try
        {  
            mDoneSignal.await();// 等待所有工作線程結束   
        }  
        catch (InterruptedException e)  
        {  
            e.printStackTrace();  
        }  
        dxcPx();//線程任務執行完后，再次獲取url隊列進行任務
    }
    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();
        }
          
    }
}