Question

我有一个webElements列表，我需要循环并点击每个元素，但是因为每次单击刷新页面我都会收到StaleElementReferenceException。每个元素都如下所示：

<img src="images/english/edit.gif" border="0" height="24" width="47">

所以我使用递归方法点击每个webElement，然后将索引传递给下一个实例并刷新列表：



public int enterDescription(int place)
{
    List descriptions = driver.findElements(By.cssSelector(img[src='images/english/edit.gif']));

for (int index = 0; index < descriptions.size(); index++) 
           {
               index = place;
               if(place==descriptions.size()) 
               {
                   return place;
               } 
               else
               {
                   descriptions.get(index).click();
                   enterDescription(place++);
               }
           }
        return place;   }

这最初工作直到方法崩溃的完成条件，在达到结束条件时我需要立即终止所有实例。有什么想法吗？

Answer 1

忽略你通过这种结构终止你希望终止的递归东西

public interface Terminatable {
    void terminate();
}

public class Terminator {
    private LinkedList<Terminatable> terminatables = new LinkedList<Terminatable>();

    public void register(Terminatable terminatable) {
        terminatables.offer(terminatable);
    }

    public void unregister(Terminatable terminatable) {
        terminatables.remove(terminatable);
    }

    public void terminate() {
        Terminatable terminatable = terminatables.poll();

        while(terminatable != null) {
            terminatable.terminate();
            terminatable = terminatables.poll();
        }
    }
}

public class Worker implements terminatable {
    private Terminator terminator;

    public Worker(Terminator terminator) {
        this.terminator = terminator;
        terminator.register(this);
    }

    public void terminate() {
        // do your termination stuff here
    }

    [...]

    public void work() {
        // do your work and start termination when you are finished
        terminator.terminate();
    }
}

如果您不再需要，请记住取消注册您的工人！

Answer 2

你真的不需要递归才能做到这一点。您只需要在每次传递开始时通过for语句刷新您的描述。像这样：

    public void enterDescription() {
        int numberOfImages = driver.findElements(By.cssSelector(img[src='images/english/edit.gif'])).size();

    for (int index = 0; index < numberOfImages; index++) {
        List<WebElement> descriptions = driver.findElements(By.cssSelector(img[src='images/english/edit.gif']));
        descriptions.get(index).click();
        // Test something
        // Do something to return to initial page
        }
    }

递归：在达到最终条件时终止所有实例

2 个答案: