Java使用selenium爬取b站动态的实现方式

brew install chromedriver

        <dependency>
            <groupId>org.seleniumhq.selenium</groupId>
            <artifactId>selenium-java</artifactId>
            <version>3.141.59</version>
        </dependency>
        <dependency>
            <groupId>com.GitHub.kevinsawicki</groupId>
            <artifactId>Http-request</artifactId>
            <version>6.0</version>
        </dependency>

package com.sun.web_crawler;

import com.github.kevinsawicki.http.HttpRequest;
import org.openqa.selenium.By;
import org.openqa.selenium.javascriptExecutor;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.chrome.ChromeOptions;

import java.io.File;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class getPictures3Test {
    // https://space.bilibili.com/4099287/dynamic
    public static WebDriver getWebDriver(int moudle, String driverPath) {
        System.setProperty("webdriver.chrome.driver", driverPath);
        HashMap<String, Object> chromePrefs = new HashMap<String, Object>();
        chromePrefs.put("profile.managed_default_content_settings.images", 2);
        WebDriver driver;
        if (moudle == 1)
            driver = new ChromeDriver(new ChromeOptions().setHeadless(true).setExperimentalOption("prefs", chromePrefs));
        else
            driver = new ChromeDriver();
        return driver;
    }

    //将所有链接对应的图片下载到path中，并按照从number开始的顺序编号
    public static void downLoad(String path, ArrayList<String> links, int number) throws Exception {
        for (String s : links) {
            System.out.println("图片：" + s);
            HttpRequest hr = HttpRequest.get("https:" + s);
            if (hr.ok()) {
                File file = new File(path + number + s.substring(s.length() - 4));
                hr.receive(file);
                number++;
            }
        }
    }

    public static void main(String[] args) throws Exception {

        //用户uid
        String uid = "4099287";
        //图片存储位置
        String dir = "/Volumes/data/data/b/tako" + File.separator;
        //driver位置
        String driverPath = "/Volumes/data/env/chromedriver/chromedriver";
        //没有图片可以加载时会显示这个
        String bottomFlag = "你已经到达了世界的尽头";
        //pt2用来匹配一个动态里的图片链接
        Pattern pt2 = Pattern.compile("//i0[^@]{50,100}(png|jpg)");
        //初始化
        WebDriver driver = getWebDriver(1, driverPath);
        JavascriptExecutor jse = (JavascriptExecutor) driver;
        ArrayList<WebElement> wes = null;
        //图片链接links
        ArrayList<String> links = new ArrayList<String>();
        driver.get("https://space.bilibili.com/" + uid + "/dynamic");
        Thread.sleep(3000);
        jse.executeScript("window.scrollBy(0," + 4000 + ");");
        long time1 = System.currentTimeMillis();
        System.out.println("开始爬取页面图片地址！");
        int i=1;
        int count=0;
        while (true) {
            System.out.println("向下滚动第"+(i++)+"次！");
            //向下滚动
            jse.executeScript("window.scrollBy(0," + 800 + 500 * Math.random() + ");");
            //如果发现到底了，就退出循环
            if (driver.findElement(By.className("div-load-more")).getAttribute("innerhtml").contains(bottomFlag))
                break;
            wes = (ArrayList<WebElement>) driver.findElements(By.className("original-card-content"));
            wes.remove(wes.size() - 1);
            //每20个动态获取一次，并删除对应的网页元素（否则会很慢）
            if (wes.size() > 20) {
                for (WebElement we : wes) {
                    String innerHtml = we.getAttribute("innerHTML");
                    Matcher matcher2 = pt2.matcher(innerHtml);
                        while (matcher2.find()) {
                            String link = matcher2.group();
                            if (link.contains("album"))
                                links.add(link);
                            System.out.println("记录图片地址数量为："+ (++count));
                        }
                    jse.executeScript("document.getElementsByClassName(\"card\")[0].remove();");
                }
            }
            Thread.sleep(50);
        }
        Collections.reverse(links);
        long time2 = System.currentTimeMillis();
        //下载
        System.out.println("开始下载图片！");
        downLoad(dir, links, 0);
        long totalMilliSeconds = time2 - time1;
        System.out.println();
        long totalSeconds = totalMilliSeconds / 1000;
         //求出现在的秒
        long currentSecond = totalSeconds % 60;
         //求出现在的分
        long totalMinutes = totalSeconds / 60;
        long currentMinute = totalMinutes % 60;
         //求出现在的小时
        long totalHour = totalMinutes / 60;
        long currentHour = totalHour % 24;
         //显示时间
        System.out.println("总毫秒为： " + totalMilliSeconds);
        System.out.println(currentHour + ":" + currentMinute + ":" + currentSecond + " GMT");
        driver.quit();
    }
}