开始准备

1. Chrome

2. 

   chromedriver 驱动（ 下载不同版本浏览器对应驱动教程 ）

代码

pom 依赖：

<dependencies>
    <!-- 添加浏览器驱动 -->
    <dependency>
        <groupId>org.seleniumhq.selenium</groupId>
        <artifactId>selenium-server</artifactId>
        <version>3.141.59</version>
    </dependency>

    <dependency>
        <groupId>cn.hutool</groupId>
        <artifactId>hutool-all</artifactId>
        <version>4.5.6</version>
    </dependency>
</dependencies>

Main 代码：

import cn.hutool.core.date.DateUtil;
import cn.hutool.core.lang.Console;
import cn.hutool.core.util.StrUtil;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.chrome.ChromeDriverService;
import org.openqa.selenium.remote.DesiredCapabilities;
import org.openqa.selenium.remote.RemoteWebDriver;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;

public class LagouSpider {    private static ArrayList<String> strings = new ArrayList<>();

    public static void main(String[] args) {        String webDriverPath = LagouSpider.class.getResource("chromedriver.exe").getPath();

        //  这里需要注意一定要和打开的 Chrome 版本匹配
        System.setProperty("webdriver.chrome.driver", webDriverPath);

        //  构建驱动
        ChromeDriverService service = new ChromeDriverService.Builder().
                usingDriverExecutable(new File(webDriverPath)).usingAnyFreePort().build();
        try {            service.start();
        } catch (IOException e) {            e.printStackTrace();
        }

        //  获取 Web 驱动
        WebDriver driver = new RemoteWebDriver(service.getUrl(), DesiredCapabilities.chrome());

        String url = "https://tophub.today/";

        //  访问页面
        driver.get(url);


        for (int i = 0; i < 200; i++) {            for (int j = 0; j <= 10; j++) {                try {                    run(driver, webDriverPath, url, i, j);
                } catch (Exception e) {
                    continue;
                }
            }
        }
        Console.log(strings);

        //  退出驱动线程
        driver.quit();
        //  关闭 service 服务
        service.stop();
    }

    public static void run(WebDriver driver, String webDriverPath, String url, int i, int j) {
        String titleExpression =
                "//div[@id='node-" + i + "']/div/div[contains(@class, 'cc-cd-ih')]/div[contains(@class, 'cc-cd-is')]/a/div[contains(@class, 'cc-cd-lb')]";
        String contentExpression =
                "//div[@id='node-" + i + "']/div/div[contains(@class, 'cc-cd-cb nano has-scrollbar')]/div[contains(@class, 'cc-cd-cb-l nano-content')]/a[" + j + "]/div[contains(@class, 'cc-cd-cb-ll')]/span[contains(@class, 't')]";

        //  获取标题
        WebElement titleElement = driver.findElement(By.xpath(titleExpression));
        String titleElementText = titleElement.getText();
        if (StrUtil.isNotEmpty(titleElementText)) {            boolean hasStr = -1 == strings.indexOf(titleElementText);
            if (hasStr) {                strings.add(titleElementText);
                Console.log(StrUtil.format("[{}]",
                        titleElementText));
            }
            WebElement textChildEle = driver.findElement(By.xpath(contentExpression));
            if (StrUtil.isNotEmpty(textChildEle.getText())) {                Console.log(StrUtil.format("\t[{}]\t[{}]({})",
                        DateUtil.now(),
                        textChildEle.getText()),
                        textChildEle.findElement(By.xpath("//div[@id='node-" + i + "']/div/div[contains(@class, 'cc-cd-cb nano has-scrollbar')]/div[contains(@class, 'cc-cd-cb-l nano-content')]/a[" + j + "]")).getAttribute("href"));
            }

            /*try {                Thread.sleep(1000L);
            } catch (InterruptedException e) {                Console.error("Thread sleep Error");
            }*/
        }
        //  获取内容列表
        /*List<WebElement> textParentEle = driver.findElements(By.xpath(contentExpression));
        for (WebElement textChildEle : textParentEle) {            WebElement childEleElement = textChildEle.findElement(By.className("t"));
            boolean isEmptyForText = StrUtil.isEmpty(childEleElement.getText());
            if (isEmptyForText) {
                continue;
            }
            Console.log(StrUtil.format("\t[{}]\t[{}]\r\n",
                    DateUtil.now(),
                    textChildEle.getText()));
        }*/

    }
}

其中相关于 XPath 知识请 进入查看 Xpath 相关：

https://blog.csdn.net/u011541946/article/details/73323911

https://blog.csdn.net/u011541946/article/details/67639423