原文地址：http://www.jianshu.com/p/c3fc3129407d

1. 爬虫框架webmagic

WebMagic是一个简单灵活的爬虫框架。基于WebMagic，你可以快速开发出一个高效、易维护的爬虫。

1.1 官网地址

官网文档写的比较清楚，建议大家直接阅读官方文档，也可以阅读下面的内容。地址如下：

官网：

中文文档地址:

English:

2. webmagic与spring boot框架集成

spring boot与webmagic的结合主要有三个模块，分别为爬取模块Processor,入库模块Pipeline，向数据库存入爬取数据，和定时任务模块Scheduled,复制定时爬取网站数据。

2.1 maven添加

2.2 爬取模块Processor

爬取简书首页Processor，分析简书首页的页面数据，获取响应的简书链接和标题，放入wegmagic的Page中，到入库模块取出添加到数据库。代码如下：

<span class="hljs-keyword">import com.shang.spray.entity.Sources;

<span class="hljs-keyword">import com.shang.spray.pipeline.NewsPipeline;

<span class="hljs-keyword">import us.codecraft.webmagic.Page;

<span class="hljs-keyword">import us.codecraft.webmagic.Site;

<span class="hljs-keyword">import us.codecraft.webmagic.Spider;

<span class="hljs-keyword">import us.codecraft.webmagic.processor.PageProcessor;

<span class="hljs-keyword">import us.codecraft.webmagic.selector.Selectable;

<span class="hljs-keyword">import java.util.List;
<span class="hljs-comment">/**


info:简书首页爬虫


Created by shang on 16/9/9.

*/

<span class="hljs-keyword">public <span class="hljs-class"><span class="hljs-keyword">class <span class="hljs-title">JianShuProcessor <span class="hljs-keyword"><span class="hljs-keyword">implements <span class="hljs-type">PageProcessor {
<span class="hljs-keyword">private Site site = Site.me()

.setDomain(<span class="hljs-string">"jianshu.com")

.setSleepTime(<span class="hljs-number">100)

.setUserAgent(<span class="hljs-string">"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_5) AppleWebKit/537.36 (KHTML,like Gecko) Chrome/52.0.2743.116 Safari/537.36");

;
<span class="hljs-keyword">public <span class="hljs-keyword">static final <span class="hljs-keyword">String list = <span class="hljs-string">"http://www.jianshu.com";
@Override

<span class="hljs-keyword">public void process(Page page) {

<span class="hljs-keyword">if (page.getUrl().regex(list).match()) {

List list=page.getHtml().xpath(<span class="hljs-string">"//ul[@class='article-list thumbnails']/li").nodes();

<span class="hljs-keyword">for (Selectable s : <span class="hljs-type">list) {

<span class="hljs-keyword">String title=s.xpath(<span class="hljs-string">"//div/h4/a/text()").toString();

<span class="hljs-keyword">String link=s.xpath(<span class="hljs-string">"//div/h4").links().toString();

News <span class="hljs-keyword">new<span class="hljs-type">s=<span class="hljs-keyword">new <span class="hljs-type">News();

<span class="hljs-keyword">new<span class="hljs-type">s.setTitle(title);

<span class="hljs-keyword">new<span class="hljs-type">s.setInfo(title);

<span class="hljs-keyword">new<span class="hljs-type">s.setLink(link);

<span class="hljs-keyword">new<span class="hljs-type">s.setSources(<span class="hljs-keyword">new <span class="hljs-type">Sources(<span class="hljs-number">5));

page.putField(<span class="hljs-string">"news"+title,<span class="hljs-keyword">new<span class="hljs-type">s);

}

}

}
@Override

<span class="hljs-keyword">public Site getSite() {

<span class="hljs-keyword">return site;

}
<span class="hljs-keyword">public <span class="hljs-keyword">static void main(<span class="hljs-keyword">String[] args) {

Spider spider=Spider.create(<span class="hljs-keyword">new <span class="hljs-type">JianShuProcessor());

spider.addUrl(<span class="hljs-string">"http://www.jianshu.com");

spider.addPipeline(<span class="hljs-keyword">new <span class="hljs-type">NewsPipeline());

spider.thread(<span class="hljs-number">5);

spider.setExitWhenComplete(<span class="hljs-literal">true);

spider.start();

}

}

2.3 入库模块Pipeline

入库模块结合spring boot的Repository模块一起组合成入库方法，继承webmagic的Pipeline，然后实现方法，在process方法中获取爬虫模块的数据，然后调用spring boot的save方法。代码如下：

<span class="hljs-keyword">import com.shang.spray.entity.News;

<span class="hljs-keyword">import com.shang.spray.entity.Sources;

<span class="hljs-keyword">import com.shang.spray.repository.NewsRepository;

<span class="hljs-keyword">import org.apache.commons.lang3.StringUtils;

<span class="hljs-keyword">import org.springframework.beans.factory.annotation.Autowired;

<span class="hljs-keyword">import org.springframework.data.jpa.domain.Specification;

<span class="hljs-keyword">import org.springframework.stereotype.Repository;

<span class="hljs-keyword">import us.codecraft.webmagic.ResultItems;

<span class="hljs-keyword">import us.codecraft.webmagic.Task;

<span class="hljs-keyword">import us.codecraft.webmagic.pipeline.Pipeline;
<span class="hljs-keyword">import javax.persistence.criteria.CriteriaBuilder;

<span class="hljs-keyword">import javax.persistence.criteria.CriteriaQuery;

<span class="hljs-keyword">import javax.persistence.criteria.Predicate;

<span class="hljs-keyword">import javax.persistence.criteria.Root;

<span class="hljs-keyword">import java.util.ArrayList;

<span class="hljs-keyword">import java.util.Date;

<span class="hljs-keyword">import java.util.List;

<span class="hljs-keyword">import java.util.Map;
<span class="hljs-comment">/**


info:新闻


Created by shang on 16/8/22.

*/

@Repository

<span class="hljs-keyword">public <span class="hljs-class"><span class="hljs-keyword">class <span class="hljs-title">NewsPipeline <span class="hljs-keyword"><span class="hljs-keyword">implements <span class="hljs-type">Pipeline {
@Autowired

protected NewsRepository <span class="hljs-keyword">new<span class="hljs-type">sRepository;
@Override

<span class="hljs-keyword">public void process(ResultItems resultItems,Task task) {

<span class="hljs-keyword">for (Map.Entry<<span class="hljs-keyword">String,Object> entry : <span class="hljs-type">resultItems.getAll().entrySet()) {

<span class="hljs-keyword">if (entry.getKey().contains(<span class="hljs-string">"news")) {

News <span class="hljs-keyword">new<span class="hljs-type">s=(News) entry.getValue();

Specification specification=<span class="hljs-keyword">new <span class="hljs-type">Specification() {

@Override

<span class="hljs-keyword">public Predicate toPredicate(Root root,CriteriaQuery<?> criteriaQuery,CriteriaBuilder criteriaBuilder) {

<span class="hljs-keyword">return criteriaBuilder.and(criteriaBuilder.equal(root.<span class="hljs-keyword">get(<span class="hljs-string">"link"),<span class="hljs-keyword">new<span class="hljs-type">s.getLink()));

}

};

<span class="hljs-keyword">if (<span class="hljs-keyword">new<span class="hljs-type">sRepository.findOne(specification) == <span class="hljs-literal">null) {<span class="hljs-comment">//检查链接是否已存在

<span class="hljs-keyword">new<span class="hljs-type">s.setAuthor(<span class="hljs-string">"水花");

<span class="hljs-keyword">new<span class="hljs-type">s.setTypeId(<span class="hljs-number">1);

<span class="hljs-keyword">new<span class="hljs-type">s.setSort(<span class="hljs-number">1);

<span class="hljs-keyword">new<span class="hljs-type">s.setStatus(<span class="hljs-number">1);

<span class="hljs-keyword">new<span class="hljs-type">s.setExplicitLink(<span class="hljs-literal">true);

<span class="hljs-keyword">new<span class="hljs-type">s.setCreateDate(<span class="hljs-keyword">new <span class="hljs-type">Date());

<span class="hljs-keyword">new<span class="hljs-type">s.setModifyDate(<span class="hljs-keyword">new <span class="hljs-type">Date());

<span class="hljs-keyword">new<span class="hljs-type">sRepository.save(<span class="hljs-keyword">new<span class="hljs-type">s);

}

}
 }
}

}

2.4 定时任务模块Scheduled

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