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README
Apache-2.0

pikachu

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皮卡丘,就决定是你了

为什么取个名字叫皮卡丘,大概是这样萌一些。小哥哥是很可爱的。然后本项目是个爬虫项目,使用时候就像派出小精灵一样,派出皮卡丘,就会为你抓回对应的数据。

使用注解的方式,定义数据源。希望pikachu可以作为很好的底层,去支撑开发者的业务系统。

目前版本迭代中。文档也准备着手编写了,原谅我一直比较懒。示例的例子,后续会提交上来。

JDK 版本 1.8

API文档:https://apidoc.gitee.com/ironzheng/pikachu/

github:https://github.com/Steelzheng/pikachu

开源中国:https://gitee.com/ironzheng/pikachu

文档地址

https://www.yuque.com/zhenggangmin/pikachu

中央仓库Maven,此处版本号为最新(随时更新)

    <dependency>
      <groupId>cn.luway</groupId>
      <artifactId>pikachu</artifactId>
      <version>1.1.7</version>
    </dependency>

计划后续将要加入的功能:

动态地址池代理,防止单一IP被封禁。(完成)

分布式(考虑中,还未定)

其他

版本动态

1.2.0

增加了自定义worker,之前设定的worker过于死板,需要开发者编写worker类才能使用,于是增加自定义worker,直接new即可,更加快捷方便。

 Pikachu pikachu = new PikachuImpl("test")
                .setCoreNum(10)
                .setMaxThreadNum(20)
                .init();

        PikachuJobManage pikachuJobManage = new PikachuJobManage(pikachu);

        CustomWorker customWorker = new CustomWorker("https://hz.lianjia.com/ershoufang/xihu/pg2/",MatchUrl.Method.GET)
                .addAttr("title","body > div.content > div.leftContent > ul > li > div.info.clear > div.title > a")
                .addPipeline(new BasePipeline() {
                    @Override
                    public void output(Map result, String url) {
                        System.out.println(result);
                    }
                });
        pikachu.regist(customWorker);

1.1.7

细小改动,升级默认模拟浏览器版本。防止部分网站对老旧浏览器不兼容。

1.1.6

加入了动态地址池代理,可以绕开某些针对IP的拦截。默认关闭,需要打开。

加入随机休眠开关,默认关闭,开启时每次访问站点会随机休眠,减少批量业务对站点的压力。

优化了一些逻辑,删除一些无用属性。

1.1.4~1.1.5

加入了预置Work,可以在需要启动的时候,直接调用pikachu.runWorkId("id")来运行Worker。灵活性加大。这个功能的maven版本号还没发布,应该和下个版本一起发布了。仓库代码已更新。

升级了jsoup版本号,发现新老版本的在流操作上接口不兼容,所以升级至最新。

移除了空闲停止爬虫的接口,改为主动停止。因为检测空闲时间会让cpu轮询空转,所以还是阻塞队列吧。

其他一些不大不小的优化。

1.1.2~1.1.3

补丁升级

修复定时管理只能注册常用worker,现支持两种模式。

1.1.1

1.1.1 版本功能介绍,相对预览版,修正了一些BUG,提升稳定性。

优化:修改批量任务处理方式,改为多线程任务调度模式。

1.1.1 预览版

重构了爬虫的核心处理逻辑,使得任务分配比之前版本更加合理,效率上也更高。由于重构了核心部分,所以对之前的版本是不兼容的。

主要优化的功能为:

1.增加cookies,可以对一些站点进行cookies参数验证,也就是模拟登陆。

2.增加一些通用接口。

3.增加定时任务。

4.增加批量处理,可以对分页地址池批量处理。

5.随机时间间隔,防止高并发对网站造成过大的压力。也防止被网站封杀。 (这个还不能彻底解决被封杀的问题,只能说一定程度缓解了高并发可能触发网站的封杀。后续版本继续考虑新的方式。)

1.0.2 升级版来啦

升级版中做了对xpath和css select的注解支持。同时优化了核心处理逻辑。使得任务的安排更加有序。 同时项目已经发布至中央仓库,可以直接添加依赖,即可快速开发。

正打算推出几个小例子,方便大家更好的使用pikachu。 还有很多地方需要优化。

1.0.0 版本 第一版

第一版其实没有太多东西,非常简单地封装了下爬虫引擎和抓取对象bean。存在很多的不足,需要改进。也欢迎大家给我多提点意见。

欢迎提交issues或者给我发邮件。

====================================================================================================

调试方式

安装Java环境,clone 代码

git clone https://gitee.com/ironzheng/pikachu.git
mvn clean install 

使用方式参考test中的示例

先配置好抓取目标的bean。

注解说明

@MatchUrl 类注解,里面有两个参数,url是目标数据的url地址,请填写完善。method是请求方式。

@CssPath 方法注解,使用select语法。

@Xpath 方法注解,使用xpath语法。Xpath是一门在 XML 文档中查找信息的语言。

两种不同的注解可以一起使用。 字段名 自定义即可。

代码示例

先创建一个目标model

// 示例
@MatchUrl(url = "https://www.dailyenglishquote.com/", method = MatchUrl.Method.GET)
public class TestBean {

    @CssPath(selector = "#content")
    private String content;
}

再创建一个输出pipeline

// 示例
public class TestPipeline extends BasePipeline<UrlConfig> {
    public EverydayPipeline(UrlConfig urlConfig) {
        super(urlConfig);
    }

    @Override
    public void output(Map<String, Elements> result, String url) {
        System.out.println(result.get("content"));
    }
}

最后启动爬虫,这里展示不同的注册方式。

// 示例
public class TestPikachu {
    public static void main(String[] args) {
       Pikachu pikachu = new Pikachu("test")
                .init()
                .regist(new Worker("test", TestBean.class)
                        .addPipeline(new TestPipeline(new TestBean())));

        // 注册批量url的Worker              
       pikahcu.regist(getWorker());
       pikachu.start();
       
    // Worker   
    GeneralWorker generalWorker =  new GeneralWorker("1", TestBean.class)
                    .addPipeline(new BasePipeline(TestBean.class) {
                        @Override
                        public void output(Map result, String url) {
                            System.out.println(result);
                        }
                    });
    
    // 创建一个定时任务中心
    PikachuJobManage pikachuJobManage = new PikachuJobManage(pikachu);
    pikachuJobManage.regiest(generalWorker,1L,5L,TimeUnit.SECONDS);
 
    }
    
    /**
    * 分页批量Worker生成示例
    * @return 
    */
     public BathWorker getWorker() {
            int i = 1;
            while (i < 100) {
                String url = "https://hz.lianjia.com/ershoufang/xihu/pg" + i + "/";
                urlList.add(url);
                i++;
            }
            attr.put("title", new Target("title", "List",
                    "body > div.content > div.leftContent > ul > li > div.info.clear", null));
            attr.put("price", new Target("price", "String",
                    "body > div.content > div.leftContent > ul > li > div.info.clear > div.priceInfo > div > span", null));
    
            worker = new BathWorker("lj")
                    .method(MatchUrl.Method.GET)
                    .urlList(urlList)
                    .attr(attr)
                    .addPipeline(new LianjiaPipeline(lianjiaRepository));
            return worker;
        }
}

几个小例子

后续写一些小例子,给大家示范一下一些站点数据的抓取。数据抓取仅限学习,不可用于商业目的。

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简介

去吧皮卡丘,为什么取个名字叫皮卡丘,大概是这样萌一些。小哥哥是很可爱的。然后本项目是个爬虫项目,使用时候就像派出小精灵一样,派出皮卡丘,就会为你抓回对应的数据。 展开 收起
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