SpringBoot+WebMagic+MyBaties实现爬虫和数据入库的示例

• 新建springboot项目：
• 2、创建cmscontentpo.java
• 3、创建crawlermapper.java
• 4、配置映射文件crawlermapper.xml
• 6、创建articlepageprocessor.java
• 7、创建articlepipeline.java
• 8、创建articletask.java
• 9、修改application

webmagic是一个开源爬虫框架，本项目通过在springboot项目中使用webmagic去抓取数据，最后使用mybatis将数据入库。

本项目代码地址：articlecrawler: srpingboot+webmagic+mybaties实现爬虫和数据入库 (gitee.com)

创建数据库：

本示例中库名为article，表名为cms_content，表中包含contentid、title、date三个字段。

create table `cms_content` (
  `contentid` varchar(40) not null comment '内容id',
  `title` varchar(150) not null comment '标题',
  `date` varchar(150) not null comment '发布日期',
  primary key (`contentid`)
) engine=innodb default charset=utf8 comment='cms内容表';

新建springboot项目：

1、配置依赖pom.xml

<?xml version="1.0" encoding="utf-8"?>
<project xmlns="http://maven.apache.org/pom/4.0.0" xmlns:xsi="http://www.w3.org/2001/xmlschema-instance"
         xsi:schemalocation="http://maven.apache.org/pom/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelversion>4.0.0</modelversion>
    <parent>
        <groupid>org.springframework.boot</groupid>
        <artifactid>spring-boot-starter-parent</artifactid>
        <version>2.5.5</version>
        <relativepath/>
    </parent>
    <groupid>com.example</groupid>
    <artifactid>article</artifactid>
    <version>0.0.1-snapshot</version>
    <name>article</name>
    <description>article</description>
    <properties>
        <java.version>1.8</java.version>
        <project.build.sourceencoding>utf-8</project.build.sourceencoding>
        <maven.test.skip>true</maven.test.skip>
        <maven.compiler.plugin.version>3.8.1</maven.compiler.plugin.version>
        <maven.resources.plugin.version>3.1.0</maven.resources.plugin.version>

        <mysql.connector.version>5.1.47</mysql.connector.version>
        <druid.spring.boot.starter.version>1.1.17</druid.spring.boot.starter.version>
        <mybatis.spring.boot.starter.version>1.3.4</mybatis.spring.boot.starter.version>
        <fastjson.version>1.2.58</fastjson.version>
        <commons.lang3.version>3.9</commons.lang3.version>
        <joda.time.version>2.10.2</joda.time.version>
        <webmagic.core.version>0.7.5</webmagic.core.version>
    </properties>

    <dependencies>
        <dependency>
            <groupid>org.springframework.boot</groupid>
            <artifactid>spring-boot-starter-web</artifactid>
        </dependency>

        <dependency>
            <groupid>org.springframework.boot</groupid>
            <artifactid>spring-boot-starter-test</artifactid>
            <scope>test</scope>
        </dependency>


        <dependency>
            <groupid>org.springframework.boot</groupid>
            <artifactid>spring-boot-configuration-processor</artifactid>
            <optional>true</optional>
        </dependency>

        <dependency>
            <groupid>mysql</groupid>
            <artifactid>mysql-connector-java</artifactid>
            <version>${mysql.connector.version}</version>
        </dependency>

        <dependency>
            <groupid>com.alibaba</groupid>
            <artifactid>druid-spring-boot-starter</artifactid>
            <version>${druid.spring.boot.starter.version}</version>
        </dependency>

        <dependency>
            <groupid>org.mybatis.spring.boot</groupid>
            <artifactid>mybatis-spring-boot-starter</artifactid>
            <version>${mybatis.spring.boot.starter.version}</version>
        </dependency>

        <dependency>
            <groupid>com.alibaba</groupid>
            <artifactid>fastjson</artifactid>
            <version>${fastjson.version}</version>
        </dependency>

        <dependency>
            <groupid>org.apache.commons</groupid>
            <artifactid>commons-lang3</artifactid>
            <version>${commons.lang3.version}</version>
        </dependency>

        <dependency>
            <groupid>joda-time</groupid>
            <artifactid>joda-time</artifactid>
            <version>${joda.time.version}</version>
        </dependency>

        <dependency>
            <groupid>us.codecraft</groupid>
            <artifactid>webmagic-core</artifactid>
            <version>${webmagic.core.version}</version>
            <exclusions>
                <exclusion>
                    <groupid>org.slf4j</groupid>
                    <artifactid>slf4j-log4j12</artifactid>
                </exclusion>
            </exclusions>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupid>org.apache.maven.plugins</groupid>
                <artifactid>maven-compiler-plugin</artifactid>
                <version>${maven.compiler.plugin.version}</version>
                <configuration>
                    <source>${java.version}</source>
                    <target>${java.version}</target>
                    <encoding>${project.build.sourceencoding}</encoding>
                </configuration>
            </plugin>

            <plugin>
                <groupid>org.apache.maven.plugins</groupid>
                <artifactid>maven-resources-plugin</artifactid>
                <version>${maven.resources.plugin.version}</version>
                <configuration>
                    <encoding>${project.build.sourceencoding}</encoding>
                </configuration>
            </plugin>

            <plugin>
                <groupid>org.springframework.boot</groupid>
                <artifactid>spring-boot-maven-plugin</artifactid>
                <configuration>
                    <fork>true</fork>
                    <addresources>true</addresources>
                </configuration>
                <executions>
                    <execution>
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

    <repositories>
        <repository>
            <id>public</id>
            <name>aliyun nexus</name>
            <url>http://maven.aliyun.com/nexus/content/groups/public/</url>
            <releases>
                <enabled>true</enabled>
            </releases>
        </repository>
    </repositories>

    <pluginrepositories>
        <pluginrepository>
            <id>public</id>
            <name>aliyun nexus</name>
            <url>http://maven.aliyun.com/nexus/content/groups/public/</url>
            <releases>
                <enabled>true</enabled>
            </releases>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </pluginrepository>
    </pluginrepositories>

</project>

2、创建cmscontentpo.java

数据实体，和表中3个字段对应。

package site.exciter.article.model;

public class cmscontentpo {
    private string contentid;

    private string title;

    private string date;

    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 getdate() {
        return date;
    }

    public void setdate(string date) {
        this.date = date;
    }
}

3、创建crawlermapper.java

package site.exciter.article.dao;

import org.apache.ibatis.annotations.mapper;
import site.exciter.article.model.cmscontentpo;

@mapper
public interface crawlermapper {
    int addcmscontent(cmscontentpo record);
}

4、配置映射文件crawlermapper.xml

在resources下新建mapper文件夹，在mapper下创建crawlermapper.xml

<?xml version="1.0" encoding="utf-8"?>
<!doctype mapper public "-//mybatis.org//dtd mapper 3.0//en" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="site.exciter.article.dao.crawlermapper">

    <insert id="addcmscontent" parametertype="site.exciter.article.model.cmscontentpo">
        insert into cms_content (contentid,
        title,
        date)
        values (#{contentid,jdbctype=varchar},
        #{title,jdbctype=varchar},
        #{date,jdbctype=varchar})
    </insert>
</mapper>

5、配置application.properties

配置数据库和mybatis映射关系。

# mysql
spring.datasource.name=mysql
spring.datasource.type=com.alibaba.druid.pool.druiddatasource
spring.datasource.driver-class-name=com.mysql.jdbc.driver
spring.datasource.url=jdbc:mysql://10.201.61.184:3306/article?useunicode=true&characterencoding=utf8&usessl=false&allowmultiqueries=true
spring.datasource.username=root
spring.datasource.password=root

# druid
spring.datasource.druid.initial-size=5
spring.datasource.druid.min-idle=5
spring.datasource.druid.max-active=10
spring.datasource.druid.max-wait=60000
spring.datasource.druid.validation-query=select 1 from dual
spring.datasource.druid.test-on-borrow=false
spring.datasource.druid.test-on-return=false
spring.datasource.druid.test-while-idle=true
spring.datasource.druid.time-between-eviction-runs-millis=60000
spring.datasource.druid.min-evictable-idle-time-millis=300000
spring.datasource.druid.max-evictable-idle-time-millis=600000

# mybatis
mybatis.mapperlocations=classpath:mapper/crawlermapper.xml

6、创建articlepageprocessor.java

解析html的逻辑。

package site.exciter.article;

import org.springframework.stereotype.component;
import us.codecraft.webmagic.page;
import us.codecraft.webmagic.site;
import us.codecraft.webmagic.processor.pageprocessor;
import us.codecraft.webmagic.selector.selectable;

@component
public class articlepageprocessor implements pageprocessor {

    private site site = site.me().setretrytimes(3).setsleeptime(1000);

    @override
    public void process(page page) {
        string detail_urls_xpath = "//*[@class='posttitle']/a[@class='posttitle2']/@href";
        string next_page_xpath = "//*[@id='nav_next_page']/a/@href";
        string next_page_css = "#homepage_top_pager > div:nth-child(1) > a:nth-child(7)";
        string title_xpath = "//h1[@class='posttitle']/a/span/text()";
        string date_xpath = "//span[@id='post-date']/text()";
        page.putfield("title", page.gethtml().xpath(title_xpath).tostring());
        if (page.getresultitems().get("title") == null) {
            page.setskip(true);
        }
        page.putfield("date", page.gethtml().xpath(date_xpath).tostring());

        if (page.gethtml().xpath(detail_urls_xpath).match()) {
            selectable detailurls = page.gethtml().xpath(detail_urls_xpath);
            page.addtargetrequests(detailurls.all());
        }

        if (page.gethtml().xpath(next_page_xpath).match()) {
            selectable nextpageurl = page.gethtml().xpath(next_page_xpath);
            page.addtargetrequests(nextpageurl.all());

        } else if (page.gethtml().css(next_page_css).match()) {
            selectable nextpageurl = page.gethtml().css(next_page_css).links();
            page.addtargetrequests(nextpageurl.all());
        }
    }

    @override
    public site getsite() {
        return site;
    }
}

7、创建articlepipeline.java

处理数据的持久化。

package site.exciter.article;

import org.slf4j.logger;
import org.slf4j.loggerfactory;
import org.springframework.beans.factory.annotation.autowired;
import org.springframework.stereotype.component;
import site.exciter.article.model.cmscontentpo;
import site.exciter.article.dao.crawlermapper;
import us.codecraft.webmagic.resultitems;
import us.codecraft.webmagic.task;
import us.codecraft.webmagic.pipeline.pipeline;

import java.util.uuid;

@component
public class articlepipeline implements pipeline {

    private static final logger logger = loggerfactory.getlogger(articlepipeline.class);

    @autowired
    private crawlermapper crawlermapper;

    public void process(resultitems resultitems, task task) {
        string title = resultitems.get("title");
        string date = resultitems.get("date");

        cmscontentpo contentpo = new cmscontentpo();
        contentpo.setcontentid(uuid.randomuuid().tostring());
        contentpo.settitle(title);
        contentpo.setdate(date);

        try {
            boolean success = crawlermapper.addcmscontent(contentpo) > 0;
            logger.info("保存成功：{}", title);
        } catch (exception ex) {
            logger.error("保存失败", ex);
        }
    }
}

8、创建articletask.java

执行抓取任务。

package site.exciter.article;

import org.slf4j.logger;
import org.slf4j.loggerfactory;
import org.springframework.beans.factory.annotation.autowired;
import org.springframework.stereotype.component;
import us.codecraft.webmagic.spider;

import java.util.concurrent.executors;
import java.util.concurrent.scheduledexecutorservice;
import java.util.concurrent.timeunit;

@component
public class articletask {
    private static final logger logger = loggerfactory.getlogger(articlepipeline.class);

    @autowired
    private articlepipeline articlepipeline;

    @autowired
    private articlepageprocessor articlepageprocessor;

    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("articlecrawlerthread");

            try {
                spider.create(articlepageprocessor)
                        .addurl("http://www.cnblogs.com/dick159/default.html?page=2")
                        // 抓取到的数据存数据库
                        .addpipeline(articlepipeline)
                        // 开启5个线程抓取
                        .thread(5)
                        // 异步启动爬虫
                        .start();
            } catch (exception ex) {
                logger.error("定时抓取数据线程执行异常", ex);
            }
        }, 0, 10, timeunit.minutes);
    }
}

9、修改application

package site.exciter.article;

import org.mybatis.spring.annotation.mapperscan;
import org.springframework.beans.factory.annotation.autowired;
import org.springframework.boot.commandlinerunner;
import org.springframework.boot.springapplication;
import org.springframework.boot.autoconfigure.springbootapplication;

@springbootapplication
@mapperscan(basepackages = "site.exciter.article.interface")
public class articleapplication implements commandlinerunner {

    @autowired
    private articletask articletask;

    public static void main(string[] args) {
        springapplication.run(articleapplication.class, args);
    }

    @override
    public void run(string... args) throws exception {
        articletask.crawl();
    }
}

10、执行application，开始抓数据并入库

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