如何在for循环的每次迭代中为一个操作启动一个线程？

I am using a for loop which run for 10 times and in each iteration driver move to different URL and loads a file which took 4 minutes to complete all 10 downloads. I was wondering if I could implement multi-threading in a for loop so that it starts a different thread for each iteration to execute the download process.

我正在使用一个运行10次的for循环,并在每个迭代驱动程序中移动到不同的URL并加载一个文件,花了4分钟完成所有10次下载。我想知道我是否可以在for循环中实现多线程,以便它为每次迭代启动一个不同的线程来执行下载过程。

for(int i=1;i<=10;i++) {
        WebDriver driver = new ChromeDriver(setChromePref(URL[i]));
        obj_SjStrore = new SjStrore(driver);
        driver.click.findelements(By.xpath("xpath string").click;
        driver.close();
}

1 个解决方案

#1

Something like this should work.

这样的事情应该有效。

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;

public class ParallelDownload implements Runnable {

    private String url;
    private String xpath;

    public ParallelDownload(String url, String xpath) {
        super();
        this.url = url;
        this.xpath = xpath;
    }

    @Override
    public void run() {
        WebDriver driver = new ChromeDriver();
        driver.get(url);
        driver.findElement(By.xpath(xpath)).click();
        driver.close();
    }

    public static void main(String[] args) {

        String url[] = new String[10];
        String xpath[] = new String[10];

        // create thread executor with pool of 10 threads
        ExecutorService executor = Executors.newFixedThreadPool(10);
        for (int i = 0; i < 10; i++) {
            // Initialize a thread and execute
            Runnable worker = new ParallelDownload(url[i], xpath[i]);
            executor.execute(worker);
        }

        executor.shutdown();
        // wait till all the threads stops executing
        while (!executor.isTerminated()) {
        }

    }

}