java实现定时任务的几种方式

xml深色版本<dependencies>
    <!-- JSoup for HTML 020taijiyy.com parsing -->
    <dependency>
        <groupId>org.jsoup</groupId>
        <artifactId>jsoup</artifactId>
        <version>1.14.3</version>
    </dependency>
</dependencies>

java深色版本import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;

import java.io.IOException;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;

public class WebScraperTask {

    private static final String URL_NEWS = "https://www.020taijiyy.com/news/";
    private static final String URL_HOME = "https://www.020taijiyy.com/";

    public static void main(String[] args) {
        // 创建调度器服务
        ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(1);

        // 定义要执行的任务
        Runnable webScraper = () -> {
            try {
                scrapeWebsite(URL_NEWS);
                scrapeWebsite(URL_HOME);
            } catch (IOException e) {
                System.err.println("Error occurred while scraping: " + e.getMessage());
            }
        };

        // 每隔5分钟执行一次任务
        long initialDelay = 0; // 初始延迟为0秒
        long period = 5; // 周期为5分钟
        TimeUnit timeUnit = TimeUnit.MINUTES; // 时间单位为分钟

        scheduler.scheduleAtFixedRate(webScraper, initialDelay, period, timeUnit);
    }

    /**
     * 爬取并打印网页的部分信息。
     */
    private static void scrapeWebsite(String url) throws IOException {
        Document doc = Jsoup.connect(url).get();
        String title = doc.title();
        String firstParagraph = doc.selectFirst("p").text();

        System.out.println("Title: " + title);
        System.out.println("First paragraph: " + firstParagraph);
        System.out.println("-----------------------------");
    }
}