实战 | WebMagic 爬取某保险经纪人网站经纪人列表之网站列表爬取
小小，这次开始使用webmagic爬取相关的网站，这里爬取的网站为 https://member.vobao.com/ 将会对该网站进行爬取，并进行实战。
分析网站
打开devtool查看网站相关的链接。单击下一页的时候，可以看到发起一个请求，这里对这个请求进行解析。
可以看到有以下的一些参数，这里用到的将会是Area1List1，以及 Area2List2 这两个参数。
查看源代码，搜索这两个参数。发现对应于城市列表页面。
使用postman进行测试
这里使用postman进行相关的测试。可以发现输出如下的内容
这里的json发送的文件如下
{
"Area1List1":"10",
"Area2List2":"121",
"Search.KeyWord":"",
"Search.AreaID1":"10",
"Search.AreaID2":"121",
"Search.AreaID3":"0",
"Search.PyCode":"0",
"Search.CompanySymbol":"0",
"Search.Year":"0",
"Search.OrderTp":"1",
"Search.SearchTp":"1",
"Search.UserLevel":"0",
"Search.SortRule":"",
"Search.PageIndex":"1",
"Search.PageSize":"10",
"Search.LastHash":"0",
"Search.TotalPages":"8",
"Search.TotalCount":"80",
"sex":"1",
"X-Requested-With":"XMLHttpRequest"
}
这样就完成了一轮新的基本的测试。
获取链接URL
这里对页面的链接进行获取，获取到相关的URL。
可以发现，我们这里需要的链接是 http://www.syxdg.cn/ 这种类型的链接，所以进行一个正则匹配。书写如下的正则，进行相关的匹配，匹配相关的url。
进行正则匹配的链接如下
page.getHtml().links().regex("(http://www.(.*).cn)").all()
匹配的核心在于
http://www.(.*).cn
使用贪婪算法，匹配www和cn之间的任意字符，进行相关的匹配。
当发现为空的时候进行跳过
if(urls == null || urls.size() == 0){
page.setSkip(true);
}
并把相关的参数，汇入list集合中
page.putField("url", urls);
其中需要发送post请求，携带参数
这里需要发送post请求，并且将会需要携带参数，如下
Request request = new Request("https://member.vobao.com/Member/SellerList?Length=6");
request.setMethod(HttpConstant.Method.POST);
request.setRequestBody(HttpRequestBody.json(
"{n" +
" "Area1List1":" + " + count + " +",n" +
" "Area2List2":"1",n" +
" "Search.KeyWord":"",n" +
" "Search.AreaID1":"-100",n" +
" "Search.AreaID2":"0",n" +
" "Search.AreaID3":"0",n" +
" "Search.PyCode":"0",n" +
" "Search.CompanySymbol":"0",n" +
" "Search.Year":"0",n" +
" "Search.OrderTp":"1",n" +
" "Search.SearchTp":"1",n" +
" "Search.UserLevel":"0",n" +
" "Search.SortRule":"",n" +
" "Search.PageIndex":"1",n" +
" "Search.PageSize":"10",n" +
" "Search.LastHash":"0",n" +
" "Search.TotalPages":"8",n" +
" "Search.TotalCount":"80",n" +
" "sex":"1",n" +
" "X-Requested-With":"XMLHttpRequest"n" +
"}",
"utf-8"));
Spider.create(new vobao())
.addRequest(request)
.addPipeline(new vobaoMysql())
.thread(50000)
.run();
其中，HttpRequestBody将会是json相关的配置信息，将会在Request进行相关的传入，实现request请求的发送。
双重循环
这里需要进行双重循环 由于城市和二级城市，这两个需要做到双重循环，双重循环如下，并且插入的时候也需要做到双重循环。
一级城市循环
int count = 1;
for(count = 1; count <= 100; count++) {
System.out.println("count: -----------------" + count);
Request request = new Request("https://member.vobao.com/Member/SellerList?Length=6");
request.setMethod(HttpConstant.Method.POST);
request.setRequestBody(HttpRequestBody.json(
"{n" +
" "Area1List1":" + " + count + " +",n" +
" "Area2List2":"1",n" +
" "Search.KeyWord":"",n" +
" "Search.AreaID1":"-100",n" +
" "Search.AreaID2":"0",n" +
" "Search.AreaID3":"0",n" +
" "Search.PyCode":"0",n" +
" "Search.CompanySymbol":"0",n" +
" "Search.Year":"0",n" +
" "Search.OrderTp":"1",n" +
" "Search.SearchTp":"1",n" +
" "Search.UserLevel":"0",n" +
" "Search.SortRule":"",n" +
" "Search.PageIndex":"1",n" +
" "Search.PageSize":"10",n" +
" "Search.LastHash":"0",n" +
" "Search.TotalPages":"8",n" +
" "Search.TotalCount":"80",n" +
" "sex":"1",n" +
" "X-Requested-With":"XMLHttpRequest"n" +
"}",
"utf-8"));
Spider.create(new vobao())
.addRequest(request)
.addPipeline(new vobaoMysql())
.thread(50000)
.run();
}
每创建一次循环，就产生一个一级城市，并开始创建一个新的爬虫。
二级城市循环
这里使用webmagic相关的爬虫，实现二级城市的循环 其核心在于以下参数， 中途经过json的相关的转化，并实现其转化的完成以及失败
// 从body中获取inta和intb
String jsonRes = new String(page.getRequest().getRequestBody().getBody());
//System.out.println(jsonRes);
Gson gson = new Gson();
RequestInfo requestInfo = gson.fromJson(jsonRes, RequestInfo.class);
// 页数加上
//requestInfo.setArea1List1((Integer.parseInt(requestInfo.getArea1List1()) + 1) + "");
requestInfo.setArea2List2((Integer.parseInt(requestInfo.getArea2List2()) + 1) + "");
System.out.println("Area2List2---------------" + requestInfo.getArea2List2());
String resNewJson = gson.toJson(requestInfo);
//System.out.println(resNewJson);
Request request = new Request("https://member.vobao.com/Member/SellerList?Length=6");
request.setMethod(HttpConstant.Method.POST);
request.setRequestBody(HttpRequestBody.json(
resNewJson,
"utf-8"));
全部代码
这里全部代码如下
package com.example.demo;
import com.example.demo.db.PingAnMysql;
import com.example.demo.db.vobaoMysql;
import com.example.demo.model.JqBxInfo;
import com.example.demo.model.RequestInfo;
import com.google.gson.Gson;
import org.apache.http.NameValuePair;
import org.apache.http.message.BasicNameValuePair;
import us.codecraft.webmagic.Page;
import us.codecraft.webmagic.Request;
import us.codecraft.webmagic.Site;
import us.codecraft.webmagic.Spider;
import us.codecraft.webmagic.model.HttpRequestBody;
import us.codecraft.webmagic.processor.PageProcessor;
import us.codecraft.webmagic.utils.HttpConstant;
import java.util.List;
public class vobao implements PageProcessor {
private Site site = Site.me().setRetryTimes(50000).setSleepTime(0);
/**
* process the page, extract urls to fetch, extract the data and store
*
* @param page page
*/
@Override
public void process(Page page) {
// 从body中获取inta和intb
String jsonRes = new String(page.getRequest().getRequestBody().getBody());
//System.out.println(jsonRes);
Gson gson = new Gson();
RequestInfo requestInfo = gson.fromJson(jsonRes, RequestInfo.class);
// 页数加上
//requestInfo.setArea1List1((Integer.parseInt(requestInfo.getArea1List1()) + 1) + "");
requestInfo.setArea2List2((Integer.parseInt(requestInfo.getArea2List2()) + 1) + "");
System.out.println("Area2List2---------------" + requestInfo.getArea2List2());
String resNewJson = gson.toJson(requestInfo);
//System.out.println(resNewJson);
Request request = new Request("https://member.vobao.com/Member/SellerList?Length=6");
request.setMethod(HttpConstant.Method.POST);
request.setRequestBody(HttpRequestBody.json(
resNewJson,
"utf-8"));
// 获取页面url
List urls = page.getHtml().links().regex("(http://www.(.*).cn)").all();
if(urls == null || urls.size() == 0){
page.setSkip(true);
}
page.putField("url", urls);
page.addTargetRequest(request);
}
/**
* get the site settings
*
* @return site
* @see Site
*/
@Override
public Site getSite() {
return this.site;
}
public static void main(String[] args){
int count = 1;
for(count = 1; count <= 100; count++) {
System.out.println("count: -----------------" + count);
Request request = new Request("https://member.vobao.com/Member/SellerList?Length=6");
request.setMethod(HttpConstant.Method.POST);
request.setRequestBody(HttpRequestBody.json(
"{n" +
" "Area1List1":" + " + count + " +",n" +
" "Area2List2":"1",n" +
" "Search.KeyWord":"",n" +
" "Search.AreaID1":"-100",n" +
" "Search.AreaID2":"0",n" +
" "Search.AreaID3":"0",n" +
" "Search.PyCode":"0",n" +
" "Search.CompanySymbol":"0",n" +
" "Search.Year":"0",n" +
" "Search.OrderTp":"1",n" +
" "Search.SearchTp":"1",n" +
" "Search.UserLevel":"0",n" +
" "Search.SortRule":"",n" +
" "Search.PageIndex":"1",n" +
" "Search.PageSize":"10",n" +
" "Search.LastHash":"0",n" +
" "Search.TotalPages":"8",n" +
" "Search.TotalCount":"80",n" +
" "sex":"1",n" +
" "X-Requested-With":"XMLHttpRequest"n" +
"}",
"utf-8"));
Spider.create(new vobao())
.addRequest(request)
.addPipeline(new vobaoMysql())
.thread(50000)
.run();
}
}
}
Mysql
这里编写Mysql相关的内容，由于传入的是List，需要实现List的批量插入
package com.example.demo.db;
import com.example.demo.model.RequestInfo;
import us.codecraft.webmagic.ResultItems;
import us.codecraft.webmagic.Task;
import us.codecraft.webmagic.pipeline.Pipeline;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.Statement;
import java.util.List;
public class vobaoMysql implements Pipeline {
/**
* Process extracted results.
*
* @param resultItems resultItems
* @param task task
*/
@Override
public void process(ResultItems resultItems, Task task) {
List list = resultItems.get("url");
for(int i = 0; i < list.size(); i++){
try {
Class.forName("com.mysql.cj.jdbc.Driver");
Connection connection = DriverManager.getConnection("jdbc:mysql://cdb-1yfd1mlm.cd.tencentcdb.com:10056/JqBxInfo", "root", "ABCcba20170607");
Statement statement = connection.createStatement();
String sql = "insert into url" + " values(" + """+ list.get(i) + """ + ")";
System.out.println(sql);
int res = statement.executeUpdate(sql);
System.out.println(res);
}catch (Exception e){
}
}
}
}
所以继续添加循环，实现批量的插入
执行效果
控制台打印出log如下
查看数据库
这里查看数据库相关的信息
这样就完成了列表页面信息的搜集。
明天将会写保单关于页面的信息搜集。
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