如何使用selenium的html单元驱动程序为java读取带有无限滚动条的页面？
例如 ，如果我想在一年前使用selenium在facebook上找到一个post，我怎么能向下滚动然后得到文本。 我已经想出了如何使用selenium进行滚动，但每当我尝试获取元素或页面源时，它只包含初始加载的页面，没有任何向下滚动到的页面。 我实际上并没有将它用于facebook，我将它用于没有java开发工具的网站，库存twits。
我在此示例中遵循的逻辑按文本内容查找post
Let Allposts While timeout Get all the currently visible posts which has text in it Remove Allposts from currentPosts [So that we dont need to check the same post again] And add currentPosts to Allposts[To maintain a list] For each post in currentPosts check if post's text contains given text stop scroll to bottom[which invokes ajax call to load more posts] //Replace the above with any button like LoadMore or something if scroll dint invoke ajax load wait till the page loaded do it again 这对我很有效，我在生日[1个月前]的墙上发现了一个post。
花了20分钟[取决于post的时间和时间，这需要更多的时间]
以下将搜索您的Facebook新闻源以获取给定文本
public static void fbSearch() { System.setProperty("webdriver.chrome.driver", "D:\\Galen\\chromedriver.exe"); WebDriver driver = new ChromeDriver(); driver.get("http://www.facebook.com"); driver.findElement(By.name("email")).sendKeys("phystem"); driver.findElement(By.name("pass")).sendKeys("yyy"); driver.findElement(By.id("loginbutton")).click(); waitForPageLoaded(driver); fbPostSearch(driver, "True Story", 20);//timeOut in Mins } public static Boolean fbPostSearch(WebDriver driver, String postContent, int timeOutInMins) { Set allPosts = new HashSet<>(); int totalTime = timeOutInMins * 60000; // in millseconds long startTime = System.currentTimeMillis(); boolean timeEnds = false; while (!timeEnds) { List posts = getPosts(driver); posts.removeAll(allPosts);//to remove old posts as we already searched it allPosts.addAll(posts);//append new posts to all posts for (WebElement post : posts) { String content = post.getText(); if (content.contains(postContent)) { //this is our element System.out.println("Found"); new Actions(driver).moveToElement(post).build().perform(); ((JavascriptExecutor) driver).executeScript("arguments[0].style.outline='2px solid #ff0';", post); return true; } } scrollToBottom(driver); waitForPageLoaded(driver); timeEnds = (System.currentTimeMillis() - startTime >= totalTime); } System.out.println("Not Found"); return false; } public static List getPosts(WebDriver driver) { //finding Posts which has textContent coz some posts are image only return driver.findElements(By.cssSelector("div._4-u2.mbm._5v3q._4-u8 div._5pbx.userContent")); } private static void scrollToBottom(WebDriver driver) { long longScrollHeight = (Long) ((JavascriptExecutor) driver).executeScript("return Math.max(" + "document.body.scrollHeight, document.documentElement.scrollHeight," + "document.body.offsetHeight, document.documentElement.offsetHeight," + "document.body.clientHeight, document.documentElement.clientHeight);" ); ((JavascriptExecutor) driver).executeScript("window.scrollTo(0, " + longScrollHeight + ");"); } public static void waitForPageLoaded(WebDriver driver) { ExpectedCondition expectation = new ExpectedCondition () { @Override public Boolean apply(WebDriver driver) { return ((JavascriptExecutor) driver).executeScript( "return document.readyState").equals("complete"); } }; WebDriverWait wait = new WebDriverWait(driver, 20); wait.until(expectation); }