Java爬虫开发(Selement)-B站粉丝取关人排查

1.爬虫开发准备

开发工具：Eclipse/IDEA

浏览器：Google Chrome

浏览器Selement驱动：Selenium 3.5

Jar包：

// Selenium驱动版本需要和Chrome浏览器版本对应，

// 下载地址http://chromedriver.storage.googleapis.com/index.html

//如果Selenium出现报错请看这篇文章：https://blog.csdn.net/qq_33259323/article/details/106445163

2.流程

1. 获取Cookie(终端输入或者使用Selenium打开扫码登录)
2. 请求https://api.bilibili.com/x/relation/followers接口
3. 解析数据
4. 存入csv

3.编码

package com.mm.rep;


import java.io.IOException;
import java.nio.charset.Charset;
import java.util.List;
import java.util.Scanner;
import java.util.Set;
import org.openqa.selenium.Cookie;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpException;
import org.apache.commons.httpclient.URI;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.httpclient.params.HttpMethodParams;
import org.apache.log4j.BasicConfigurator;
import org.apache.log4j.LogManager;
import org.apache.log4j.Logger;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.chrome.ChromeOptions;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.csvreader.CsvWriter;
import org.apache.commons.lang3.StringUtils;

public class Main {
	private static final Logger logger = LogManager.getLogger(Main.class);
	
	private static WebDriver driver = null;
	private static GetMethod getMethod = null;
	private static Set<Cookie> bcookies = null;
	private final static String BLOGINURL = "https://passport.bilibili.com/login";
	private final static String BMAINPAGE = "https://www.bilibili.com/";
	
	Main(){
		BasicConfigurator.configure();
		// 初始化GetMethod,设置不变的RequestHeader
		getMethod = new GetMethod();
		getMethod.getParams().setParameter(HttpMethodParams.HTTP_CONTENT_CHARSET, "UTF-8");
		getMethod.addRequestHeader(":authority", "api.bilibili.com");
		getMethod.addRequestHeader(":method", "api.bilibili.com");
		getMethod.addRequestHeader(":scheme", "GET");
		getMethod.addRequestHeader(":scheme", "https");
		getMethod.addRequestHeader("accept", "*/*");
		getMethod.addRequestHeader(":scheme", "https");
		getMethod.addRequestHeader("accept-language", "zh-CN,zh;q=0.9");
		getMethod.addRequestHeader("sec-fetch-dest", "script");
		getMethod.addRequestHeader("sec-fetch-mode", "no-cors");
		getMethod.addRequestHeader("sec-fetch-site", "same-site");
		getMethod.addRequestHeader("user-agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.83 Safari/537.36");
	}
	
	
	public static String getCookie() throws InterruptedException {
		
		String scCookie = null;
        Scanner ip = new Scanner(System.in);
        logger.info("请输入Cookie,如果没有请按回车:");
        scCookie = ip.nextLine();
        
        if(scCookie.length() != 0) {
        	return scCookie;
        }
        
        logger.info("开始扫码登录");
		// 设置驱动地址
		System.setProperty("webdriver.chrome.driver", "H:/chromedriver/chromedriver.exe");
		// 启动设置
		ChromeOptions options = new ChromeOptions();
		// 创建ChromeDriver
		driver = new ChromeDriver(options);
		// 打开Bilibili登录页面
		driver.get(BLOGINURL);
		// 等待扫码登录
		while(true) {
			if(driver.getCurrentUrl().equals(BMAINPAGE)) {
				break;
			}else {
				Thread.sleep(100);
			}
		}
				
		logger.info("扫码登录成功");
				
		//获取cookie
		bcookies = driver.manage().getCookies();
		String cookie = StringUtils.join(bcookies, "; ");
		
		return cookie;
	}
	
	public static List<JSONObject> getFanS(String cookie,String vmid,int pn,int ps) throws InterruptedException, HttpException, IOException {
		
		HttpClient client = new HttpClient(); 
		// 拼接url
		StringBuffer sBuffer = new StringBuffer();
		sBuffer.append("https://api.bilibili.com/x/relation/followers?vmid=");
		sBuffer.append(vmid);
		sBuffer.append("&pn=");
		sBuffer.append(pn);
		sBuffer.append("&ps=");
		sBuffer.append(ps);
		sBuffer.append("&order=desc&jsonp=jsonp");
		getMethod.setURI(new URI(sBuffer.toString(), true));
		getMethod.getParams().setParameter(HttpMethodParams.HTTP_CONTENT_CHARSET, "UTF-8");
		// 设置请求头
		getMethod.addRequestHeader("cookie", cookie);
		// 发送请求
		client.executeMethod(getMethod);
		// 获取数据
		String info = new String(getMethod.getResponseBody(), "UTF-8");
		JSONObject fans = JSONObject.parseObject(info).getJSONObject("data");
		JSONArray fArray = JSONArray.parseArray(fans.getString("list"));
		
		return JSON.parseArray(fArray.toJSONString(), JSONObject.class);
	}
	
	public static void main(String[] args) throws InterruptedException, HttpException{
		logger.info("程序开始...");
		new Main();
		// 获取Cookie
		String cookie = Main.getCookie();
		
		
		CsvWriter csvWriter = new CsvWriter("C:\\Users\\computer\\Desktop\\aaa.csv", ',', Charset.forName("UTF-8"));
		String[] csvHeaders = { "mid", "粉丝名字","粉丝签名","粉丝头像"};
			try {
				csvWriter.writeRecord(csvHeaders);
			
			int pn = 1;
			boolean end = false;
			while(true) {
				for (JSONObject f : Main.getFanS(cookie, "309103931", pn, 20)) {
					if(f == null) {
						end = true;
						break;
					}
					String[] csvContent1 = {f.getString("mid"), f.getString("uname"),f.getString("sign"),f.getString("face")};
					System.out.println(csvContent1);
					csvWriter.writeRecord(csvContent1);
				}
				pn++;
				Thread.sleep(100);
				if(end == true) {
					break;
				}
			}
		} catch (IOException e) {
			System.out.println(e);
			e.printStackTrace();
		}

		csvWriter.close();
		driver.close();
		logger.info("程序结束");
	}
	
	
} 

4.缺点

容易被拦截，最多获取不到1000个

详细代码：https://github.com/mmnbplus/BiliBiliReptiles

B站地址：https://www.bilibili.com/read/cv7361471

本文地址：https://blog.csdn.net/qq_33259323/article/details/108228980