使用Jsoup爬取网站图片

package com.test.pic.crawler; import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;
import java.net.URLConnection;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.LinkedBlockingDeque;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import org.apache.commons.lang3.concurrent.BasicThreadFactory;
import org.jsoup.Jsoup;
import org.jsoup.nodes.*;
import org.jsoup.select.Elements; /**
* @Title: PicCrawler.java
*
* @Package com.test.pic.crawler
*
* @Description: 爬取指定网站的指定Tag下的图片或者全部Tag图片
*
* @author CoderZZ
*
* @date 2018年1月12日 下午11:22:41
*
* @version V1.0
*
*/
public class PicCrawler implements Runnable{
private static String pathString = "G:/test/pic/";//存储目录
//存储真正的爬取页面
static BlockingQueue<String> urlBlockingQueue = new LinkedBlockingDeque<String>(1000);
static int threadNum = 10;
// public PicCrawler(String url){
// this.url = url;
// } /**
* @Title: main
*
* @Description: TODO(这里用一句话描述这个方法的作用)
*
* @param @param args 设定文件
*
* @return void 返回类型
*
* @throws
*
*/
public static void main(String[] args) {
String homeurlString = "https://www.xxxx.com";//爬取页面的基本地址
String tagPageUrl = "https://www.xxxx.com/tag/";//tag分页地址
//Tag标签的完整路径
Set<String> tagFullHrefSet = new HashSet<String>(16);
//想要爬取哪些tag，如果为空，则全部爬取;否则只配置对应的tag
String[] crawlerTagArray = {"风景"};
List<String> crawlerTagList = Arrays.asList(crawlerTagArray);
try {
//1.获取想要的tag完整的url
Document tagListDocument = Jsoup.connect(tagPageUrl).get();
Elements tagsListDivElements = tagListDocument.getElementsByClass("tags_list");
for(Element element:tagsListDivElements){
Elements aElements = element.getElementsByTag("a");
for(Element a:aElements){
if(crawlerTagList.size() == 0 || crawlerTagList.contains(a.text())){
String tagUrlString = homeurlString+a.attr("href");
//https://www.xxxx.com/tag/fengjing.html
tagUrlString = tagUrlString.substring(0, tagUrlString.lastIndexOf("."))+"/1.html";
tagFullHrefSet.add(tagUrlString);
}
}
}
//2.获取图片链接页面地址，分页爬取
for(String tagUrl:tagFullHrefSet){
String tempTagUrlString = tagUrl;
int currentPageNum = 1;
while(true){
try{
Document imagePageDocument = Jsoup.connect(tempTagUrlString).get();
Elements imageListElements = imagePageDocument.getElementsByClass("Pli-litpic");
if(imageListElements.size() == 0){
break;
}
for(Element image:imageListElements){
urlBlockingQueue.offer(homeurlString+image.attr("href"));
}
//https://www.xxxx.com/tag/fengjing/1.html
tempTagUrlString = tempTagUrlString.substring(0, tempTagUrlString.lastIndexOf("/")+1)+(++currentPageNum)+".html";
}catch(Exception e){
break;
}
}
}
ScheduledExecutorService excutor = new ScheduledThreadPoolExecutor(threadNum,new BasicThreadFactory.Builder().namingPattern("my-crawler-thread-%d").daemon(false).build());
for(int i=0;i<threadNum;i++){
// excutor.schedule(new PicCrawler(urlArray[i]), 1, TimeUnit.SECONDS);
// excutor.execute(new PicCrawler(urlArray[i]));
excutor.submit(new PicCrawler());
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
@Override
public void run() {
while (true) {
try {
long begin = System.currentTimeMillis();
String url = urlBlockingQueue.poll();
if(null != url){
Document doc = Jsoup.connect(url).get();
Elements titleElements =doc.select("#photos > h1");
if(null != titleElements && null != titleElements.get(0)){
Set<String> imgSrcSet = new HashSet<String>(16);
Element titleElement = titleElements.get(0);
String foldNameString = titleElement.text();
String[] nameArray = foldNameString.split("\\(");
foldNameString = nameArray[0];
nameArray = nameArray[1].split("/");
int totalPaggs = Integer.parseInt(nameArray[1].replace(")", ""));
for(int i=1;i<=totalPaggs;i++){
String urlTemp = url.replace(".html", "_"+i+".html");
Document docTemp = Jsoup.connect(urlTemp).get();
Element element = docTemp.getElementById("big-pic");
Elements imgElements = element.getElementsByTag("img");
for(Element imgElement:imgElements){
imgSrcSet.add(imgElement.attr("src"));
}
}
if(imgSrcSet.size()>0){
for(String imgSrc:imgSrcSet){
// 构造URL
URL imgurl = new URL(imgSrc);
// 打开连接
URLConnection con = imgurl.openConnection();
//设置请求超时为10s
con.setConnectTimeout(10*1000);
// 输入流
InputStream is = con.getInputStream();
// 500k的数据缓冲
byte[] bs = new byte[1024*500];
// 读取到的数据长度
int len;
// 输出的文件流
File sf=new File(pathString+"\\"+foldNameString);
if(!sf.exists()){
sf.mkdirs();
}
String filename = imgSrc.split("/")[imgSrc.split("/").length-1];
OutputStream os = new FileOutputStream(sf.getPath()+"\\"+filename);
// 开始读取
while ((len = is.read(bs)) != -1) {
os.write(bs, 0, len);
}
// 完毕，关闭所有链接
os.close();
is.close();
System.out.println(imgSrc+"下载完成!!!");
}
}
long end = System.currentTimeMillis();
System.out.println("================================================================");
System.out.println(Thread.currentThread().getName()+"******************已全部下载完成，用时："+((end-begin)/1000)+"S");
}
}else{
System.out.println("========================BlockingQueue已空，已全部抓取完成!=======================");
}
} catch (Exception e) {
System.out.println("========================抓取异常=======================");
}
}
}
}