springboot+WebMagic+MyBatis爬虫框架的使用 springboot+WebMagic+MyBatis爬虫框架

1.添加maven依赖
2.项目配置文件 application.properties
3.数据库表结构
4.实体类
5.mapper接口
6.CrawlerMapper.xml文件
7.知乎页面内容处理类ZhihuPageProcessor
8.知乎数据处理类ZhihuPipeline
9.知乎爬虫任务类ZhihuTask
10.Spring boot程序启动类

WebMagic是一个开源的java爬虫框架。WebMagic框架的使用并不是本文的重点，具体如何使用请参考官方文档：http://webmagic.io/docs/。

本文是对spring boot+WebMagic+MyBatis做了整合，使用WebMagic爬取数据，然后通过MyBatis持久化爬取的数据到mysql数据库。本文提供的源代码可以作为java爬虫项目的脚手架。

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1.添加maven依赖

4.0.0hyzxqbasic-crawler1.0.0org.springframework.bootspring-boot-starter-parent1.5.21.RELEASE UTF-8true1.83.8.13.1.05.1.471.1.171.3.41.2.583.92.10.20.7.3org.springframework.bootspring-boot-devtoolsruntimetrueorg.springframework.bootspring-boot-starter-testtestorg.springframework.bootspring-boot-configuration-processortruemysqlmysql-connector-java${mysql.connector.version}com.alibabadruid-spring-boot-starter${druid.spring.boot.starter.version}org.mybatis.spring.bootmybatis-spring-boot-starter${mybatis.spring.boot.starter.version}com.alibabafastjson${fastjson.version}org.apache.commonscommons-lang3${commons.lang3.version}joda-timejoda-time${joda.time.version}us.codecraftwebmagic-core${webmagic.core.version}org.slf4jslf4j-log4j12org.apache.maven.pluginsmaven-compiler-plugin${maven.compiler.plugin.version}${java.version}${java.version}${project.build.sourceEncoding}org.apache.maven.pluginsmaven-resources-plugin${maven.resources.plugin.version}${project.build.sourceEncoding}org.springframework.bootspring-boot-maven-plugintruetruerepackagepublicaliyun nexushttp://maven.aliyun.com/nexus/content/groups/public/truepublicaliyun nexushttp://maven.aliyun.com/nexus/content/groups/public/truefalse

2.项目配置文件 application.properties
配置mysql数据源，druid数据库连接池以及MyBatis的mapper文件的位置。

# mysql数据源配置spring.datasource.name=mysqlspring.datasource.type=com.alibaba.druid.pool.DruidDataSourcespring.datasource.driver-class-name=com.mysql.jdbc.Driverspring.datasource.url=jdbc:mysql://192.168.0.63:3306/gjhzjl?useUnicode=true&characterEncoding=utf8&useSSL=false&allowMultiQueries=truespring.datasource.username=rootspring.datasource.password=root# druid数据库连接池配置spring.datasource.druid.initial-size=5spring.datasource.druid.min-idle=5spring.datasource.druid.max-active=10spring.datasource.druid.max-wait=60000spring.datasource.druid.validation-query=SELECT 1 FROM DUALspring.datasource.druid.test-on-borrow=falsespring.datasource.druid.test-on-return=falsespring.datasource.druid.test-while-idle=truespring.datasource.druid.time-between-eviction-runs-millis=60000spring.datasource.druid.min-evictable-idle-time-millis=300000spring.datasource.druid.max-evictable-idle-time-millis=600000# mybatis配置mybatis.mapperLocations=classpath:mapper/**/*.xml

3.数据库表结构

CREATE TABLE `cms_content` (`contentId` varchar(40) NOT NULL COMMENT '内容ID',`title` varchar(150) NOT NULL COMMENT '标题',`content` longtext COMMENT '文章内容',`releaseDate` datetime NOT NULL COMMENT '发布日期',PRIMARY KEY (`contentId`)) ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT='CMS内容表';

4.实体类

import java.util.Date; public class CmsContentPO {private String contentId; private String title; private String content; private Date releaseDate; public String getContentId() {return contentId; }public void setContentId(String contentId) {this.contentId = contentId; }public String getTitle() {return title; }public void setTitle(String title) {this.title = title; }public String getContent() {return content; }public void setContent(String content) {this.content = content; }public Date getReleaseDate() {return releaseDate; }public void setReleaseDate(Date releaseDate) {this.releaseDate = releaseDate; }}

【springboot+WebMagic+MyBatis爬虫框架的使用】
5.mapper接口

public interface CrawlerMapper {int addCmsContent(CmsContentPO record); }

6.CrawlerMapper.xml文件

insert into cms_content (contentId,title,releaseDate,content)values (#{contentId,jdbcType=VARCHAR},#{title,jdbcType=VARCHAR},#{releaseDate,jdbcType=TIMESTAMP},#{content,jdbcType=LONGVARCHAR})

7.知乎页面内容处理类ZhihuPageProcessor
主要用于解析爬取到的知乎html页面。

@Componentpublic class ZhihuPageProcessor implements PageProcessor {private Site site = Site.me().setRetryTimes(3).setSleepTime(1000); @Overridepublic void process(Page page) {page.addTargetRequests(page.getHtml().links().regex("https://www\\.zhihu\\.com/question/\\d+/answer/\\d+.*").all()); page.putField("title", page.getHtml().xpath("//h1[@class='QuestionHeader-title']/text()").toString()); page.putField("answer", page.getHtml().xpath("//div[@class='QuestionAnswer-content']/tidyText()").toString()); if (page.getResultItems().get("title") == null) {// 如果是列表页，跳过此页，pipeline不进行后续处理page.setSkip(true); }}@Overridepublic Site getSite() {return site; }}

8.知乎数据处理类ZhihuPipeline
主要用于将知乎html页面解析出的数据存储到mysql数据库。

@Componentpublic class ZhihuPipeline implements Pipeline {private static final Logger LOGGER = LoggerFactory.getLogger(ZhihuPipeline.class); @Autowiredprivate CrawlerMapper crawlerMapper; public void process(ResultItems resultItems, Task task) {String title = resultItems.get("title"); String answer = resultItems.get("answer"); CmsContentPO contentPO = new CmsContentPO(); contentPO.setContentId(UUID.randomUUID().toString()); contentPO.setTitle(title); contentPO.setReleaseDate(new Date()); contentPO.setContent(answer); try {boolean success = crawlerMapper.addCmsContent(contentPO) > 0; LOGGER.info("保存知乎文章成功：{}", title); } catch (Exception ex) {LOGGER.error("保存知乎文章失败", ex); }}}

9.知乎爬虫任务类ZhihuTask
每十分钟启动一次爬虫。

@Componentpublic class ZhihuTask {private static final Logger LOGGER = LoggerFactory.getLogger(ZhihuPipeline.class); @Autowiredprivate ZhihuPipeline zhihuPipeline; @Autowiredprivate ZhihuPageProcessor zhihuPageProcessor; private ScheduledExecutorService timer = Executors.newSingleThreadScheduledExecutor(); public void crawl() {// 定时任务，每10分钟爬取一次timer.scheduleWithFixedDelay(() -> {Thread.currentThread().setName("zhihuCrawlerThread"); try {Spider.create(zhihuPageProcessor)// 从https://www.zhihu.com/explore开始抓.addUrl("https://www.zhihu.com/explore")// 抓取到的数据存数据库.addPipeline(zhihuPipeline)// 开启2个线程抓取.thread(2)// 异步启动爬虫.start(); } catch (Exception ex) {LOGGER.error("定时抓取知乎数据线程执行异常", ex); }}, 0, 10, TimeUnit.MINUTES); }}

10.Spring boot程序启动类

@SpringBootApplication@MapperScan(basePackages = "com.hyzx.qbasic.dao")public class Application implements CommandLineRunner {@Autowiredprivate ZhihuTask zhihuTask; public static void main(String[] args) throws IOException {SpringApplication.run(Application.class, args); }@Overridepublic void run(String... strings) throws Exception {// 爬取知乎数据zhihuTask.crawl(); }}

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