章节十二、3-如何检查元素是不是在页面存在

　一、封装一个验证元素在页面上是否存在的方法

package usefulmethods;

import java.util.List;

import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;

public class GenericMethods {
    
    WebDriver driver;
//    创建一个构成方法，用于初始化对象
    public GenericMethods(WebDriver driver) {
        this.driver = driver;
    }
    
//    查找单个元素
    public WebElement getElement(String type,String locator) {
        if(type.equals("id")) {
            System.out.println("用id查找元素："+locator);
            return this.driver.findElement(By.id(locator));
        }else if(type.equals("xpath")) {
            System.out.println("用xpath查找元素："+locator);
            return this.driver.findElement(By.xpath(locator));
        }else if(type.equals("name")) {
            System.out.println("用name查找元素："+locator);
            return this.driver.findElement(By.name(locator));
        }else if(type.equals("cssSelector")) {
            System.out.println("用cssSelector查找元素："+locator);
            return this.driver.findElement(By.cssSelector(locator));
        }else if(type.equals("cssSelector")) {
            System.out.println("用cssSelector查找元素："+locator);
            return this.driver.findElement(By.cssSelector(locator));
        }else if(type.equals("linkText")) {
            System.out.println("用linkText查找元素："+locator);
            return this.driver.findElement(By.linkText(locator));
        }else if(type.equals("partialLinkText")) {
            System.out.println("用partialLinkText查找元素："+locator);
            return this.driver.findElement(By.partialLinkText(locator));
        }else if(type.equals("tagName")) {
            System.out.println("用tagName查找元素："+locator);
            return this.driver.findElement(By.tagName(locator));
        }else if(type.equals("className")) {
            System.out.println("用className查找元素："+locator);
            return this.driver.findElement(By.className(locator));
        }else {
            System.out.println("定位的路径不支持");
            return null;
        }
    }
    
//    查找多个元素
    public List<WebElement> getElementList(String type,String locator) {
        if(type.equals("id")) {
            System.out.println("用id查找元素："+locator);
            return this.driver.findElements(By.id(locator));
        }else if(type.equals("xpath")) {
            System.out.println("用xpath查找元素："+locator);
            return this.driver.findElements(By.xpath(locator));
        }else if(type.equals("name")) {
            System.out.println("用name查找元素："+locator);
            return this.driver.findElements(By.name(locator));
        }else if(type.equals("cssSelector")) {
            System.out.println("用cssSelector查找元素："+locator);
            return this.driver.findElements(By.cssSelector(locator));
        }else if(type.equals("cssSelector")) {
            System.out.println("用cssSelector查找元素："+locator);
            return this.driver.findElements(By.cssSelector(locator));
        }else if(type.equals("linkText")) {
            System.out.println("用linkText查找元素："+locator);
            return this.driver.findElements(By.linkText(locator));
        }else if(type.equals("partialLinkText")) {
            System.out.println("用partialLinkText查找元素："+locator);
            return this.driver.findElements(By.partialLinkText(locator));
        }else if(type.equals("tagName")) {
            System.out.println("用tagName查找元素："+locator);
            return this.driver.findElements(By.tagName(locator));
        }else if(type.equals("className")) {
            System.out.println("用className查找元素："+locator);
            return this.driver.findElements(By.className(locator));
        }else {
            System.out.println("定位的路径不支持");
            return null;
        }    
    }

 87 //    验证元素在页面上是否存在
    public boolean isElemenetPresent(String type,String locator) {
//        直接调用改类中查找元素的方法
        List<WebElement> elementList = getElementList(type,locator);
        int size = elementList.size();
        if(size>0) {
            System.out.println(locator+"在页面上匹配到的元素个数为："+size);
            return true;
        }else {
            System.out.println(locator+"在页面上匹配到的元素个数为："+size);
            return false;
        }
    }
}

二、实例演示

package usefulmethods;

import java.util.List;
import java.util.concurrent.TimeUnit;

import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.chrome.ChromeDriver;

class GenericMethodsDemoPresent {
    private WebDriver driver;
    private String url;
//    创建一个GenericMethods类的引用
    private GenericMethods gm;

    @BeforeEach
    public void setUp() throws Exception {
        driver = new ChromeDriver();
//        实例化查找元素的方法
        gm = new GenericMethods(driver);
        url = "C:\Users\acer\eclipse-workspace\SeleniumPractise\PracticePage.html";
        driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);
        driver.manage().window().maximize();
    }

    @Test
    public void test() {
        driver.get(url);
//        判断元素是否存在
//        通过调用GenericMethods类中的isElemenetPresent方法，传入查找元素的方式和路径
        boolean el = gm.isElemenetPresent("cssSelector", "#name");
        System.out.println("页面元素存在情况为："+el+"
");
        
        boolean ell = gm.isElemenetPresent("cssSelector", "#ne");
        System.out.println("页面元素存在情况为："+ell);
    }

    @AfterEach
    public void tearDown() throws Exception {
        Thread.sleep(2000);
        driver.quit();
    }
}

运行结果为：

用cssSelector查找元素：#name
#name在页面上匹配到的元素个数为：1
页面元素存在情况为：true

用cssSelector查找元素：#ne
#ne在页面上匹配到的元素个数为：0
页面元素存在情况为：false

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