隐式等待相当于设置全局的等待，在定位元素时，对所有元素设置超时时间。
隐式等待使得WebDriver在查找一个Element或者Element数组时，每隔一段特定的时间就会轮询一次DOM，如果Element或数组没有马上被发现的话。
默认设置是0。一旦设置，这个隐式等待会在WebDriver对象实例的整个生命周期起作用。一劳永逸。
1 package com.test.elementwait; 2 3 import java.text.SimpleDateFormat; 4 import java.util.Calendar; 5 import java.util.concurrent.TimeUnit; 6 7 import org.openqa.selenium.By; 8 import org.openqa.selenium.NoSuchElementException; 9 import org.openqa.selenium.WebDriver; 10 import org.openqa.selenium.firefox.FirefoxDriver; 11 import org.openqa.selenium.support.ui.WebDriverWait; 12 13 public class ImplicitWait { 14 15 public static void main(String[] args) { 16 WebDriver driver = new FirefoxDriver(); 17 driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS); 18 driver.get("http://www.baidu.com"); 19 driver.manage().window().maximize(); 20 21 try { 22 SimpleDateFormat format = new SimpleDateFormat("HH-mm-ss-SSS"); 23 String time = format.format(Calendar.getInstance().getTime()); 24 System.out.println("开始的时间： " + time); 25 26 driver.findElement(By.id("kw22")).sendKeys("selenium"); 27 28 } catch (NoSuchElementException e) { 29 System.out.println("没有找到元素"); 30 e.printStackTrace(); 31 } finally { 32 SimpleDateFormat format2 = new SimpleDateFormat("HH-mm-ss-SSS"); 33 String time2 = format2.format(Calendar.getInstance().getTime()); 34 System.out.println("结束的时间： " + time2); 35 driver.quit(); 36 } 37 38 } 39 40 }
执行结果：
1 开始的时间： 23-12-26-775 2 没有找到元素 3 org.openqa.selenium.NoSuchElementException: Unable to locate element: {"method":"id","selector":"kw22"} 4 Command duration or timeout: 10.46 seconds 5 For documentation on this error, please visit: http://seleniumhq.org/exceptions/no_such_element.html 6 Build info: version: '2.53.0', revision: '35ae25b', time: '2016-03-15 16:57:40' 7 8 Driver info: org.openqa.selenium.firefox.FirefoxDriver 9 Capabilities [{applicationCacheEnabled=true, rotatable=false, handlesAlerts=true, databaseEnabled=true, version=45.2.0, platform=WINDOWS, nativeEvents=false, acceptSslCerts=true, webStorageEnabled=true, locationContextEnabled=true, browserName=firefox, takesScreenshot=true, javascriptEnabled=true, cssSelectorsEnabled=true}] 10 Session ID: dda0673c-da3d-4173-a904-d17148a3e26e 11 *** Element info: {Using=id, value=kw22} 12 at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) 13 at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) 14 at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) 15 at java.lang.reflect.Constructor.newInstance(Constructor.java:408) 16 at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:206) 17 at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:158) 18 at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:678) 19 at org.openqa.selenium.remote.RemoteWebDriver.findElement(RemoteWebDriver.java:363) 20 at org.openqa.selenium.remote.RemoteWebDriver.findElementById(RemoteWebDriver.java:413) 21 at org.openqa.selenium.By$ById.findElement(By.java:218) 22 at org.openqa.selenium.remote.RemoteWebDriver.findElement(RemoteWebDriver.java:355) 23 at com.test.elementwait.ImplicitWait.main(ImplicitWait.java:26) 24 结束的时间： 23-12-37-273