如何使用 Selenium 在网页上单击打印按钮

2022-01-10 00:00:00 selenium google-maps navigation javascript java

我想点击这个页面的打印按钮:

，还是有希望的，你会看到有相关的:

<块引用>

--disable-print-preview - 禁用打印预览(用于测试和不喜欢我们的用户.:[)

好的，我们试试看:

ChromeOptions 选项 = new ChromeOptions();options.addArguments("--disable-print-preview");WebDriver driver = new ChromeDriver(options);driver.get(url);

现在，显示了一个系统打印对话框:

Selenium 也无法控制它.所以，不，没有希望.哦，等等！

<小时>

好的，如果我们超出了 selenium 的范围，让我们使用可以帮助我们单击对话框中的 Print 按钮的工具 - Robot 类:

<块引用>

该类用于为测试自动化、自运行演示和其他目的需要控制鼠标和键盘的应用程序.

我们将初始化 Robot 并在打印对话框出现时发送 Enter 键:

包com.company；导入 org.openqa.selenium.By；导入 org.openqa.selenium.WebDriver；导入 org.openqa.selenium.WebElement；导入 org.openqa.selenium.chrome.ChromeDriver；导入 org.openqa.selenium.support.ui.ExpectedConditions；导入 org.openqa.selenium.support.ui.WebDriverWait；导入 java.awt.*；导入 java.awt.event.KeyEvent；公共类主要{public static void main(String[] args) 抛出 AWTException，InterruptedException {字符串 url = "https://www.google.com/maps/dir/40.4515849,-3.6903752/41.380896,2.1228198/@40.4515849,-3.6903752/am=t/?hl=en";机器人 r = new Robot();r.延迟(1000)；WebDriver driver = new ChromeDriver();driver.get(url);//打开打印下拉菜单WebDriverWait 等待 = new WebDriverWait(驱动程序, 10);wait.until(ExpectedConditions.elementToBeClickable(By.cssSelector("button.print-button"))).click();//点击打印按钮WebElement printButton = driver.findElement(By.cssSelector("button.print-popup-button"));printButton.click();线程.sleep(2000);r.keyPress(KeyEvent.VK_ENTER);r.keyRelease(KeyEvent.VK_ENTER);}}

使用其他选项:

  • sikuli - 您需要打印按钮的图像才能sikuli 找到它并点击
  • autoit

另见:

  • 如何在 Selenium 中处理打印对话框?

I want to click on the print button in this page :

https://www.google.com/maps/dir/40.4515849,-3.6903752/41.380896,2.1228198/@40.4515849,-3.6903752/am=t/?hl=en

and then save the PDF...

this is the code for click the button:

String url = "https://www.google.com/maps/dir/40.4515849,-3.6903752/41.380896,2.1228198/@40.4515849,-3.6903752/am=t/?hl=en";

WebDriver driver = new HtmlUnitDriver();
driver.get(url);

System.out.println(driver.getTitle());
System.out.println(driver.getCurrentUrl());

WebElement element = driver.findElement(By.xpath("//*[@id="text-mode-options-header"]/div/div/div[2]/div[2]/div/button[1]"));
element.click();

System.out.println("Page title is: " + driver.getTitle());
driver.quit();

but I get the following error:

    Exception in thread "main" org.openqa.selenium.NoSuchElementException: Unable to locate a node using //*[@id="text-mode-options-header"]/div/div/div[2]/div[2]/div/button[1]
For documentation on this error, please visit: http://seleniumhq.org/exceptions/no_such_element.html
Build info: version: '2.43.1', revision: '5163bce', time: '2014-09-10 16:27:58'
Driver info: driver.version: HtmlUnitDriver
    at org.openqa.selenium.htmlunit.HtmlUnitDriver.findElementByXPath(HtmlUnitDriver.java:1057)
    at org.openqa.selenium.By$ByXPath.findElement(By.java:357)
    at org.openqa.selenium.htmlunit.HtmlUnitDriver$5.call(HtmlUnitDriver.java:1575)
    at org.openqa.selenium.htmlunit.HtmlUnitDriver$5.call(HtmlUnitDriver.java:1)
    at org.openqa.selenium.htmlunit.HtmlUnitDriver.implicitlyWaitFor(HtmlUnitDriver.java:1251)
    at org.openqa.selenium.htmlunit.HtmlUnitDriver.findElement(HtmlUnitDriver.java:1572)
    at org.openqa.selenium.htmlunit.HtmlUnitDriver.findElement(HtmlUnitDriver.java:532)
    at com.controlstation.start.Main.main(Main.java:24)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:483)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:134)

how can I do this using Selenium? is there another way? thanks.

EDIT:

解决方案

Here's my insight.

First of all, you need to wait for the page to load in order to interact with the Print button. The best way to go is to use built-in mechanism: selenium waits - wait for the Print button to be clickable:

// open print dropdown
WebDriverWait wait = new WebDriverWait(driver, 10);
wait.until(ExpectedConditions.elementToBeClickable(By.cssSelector("button.print-button"))).click();

// click print button
WebElement printButton = driver.findElement(By.cssSelector("button.print-popup-button"));
printButton.click();

Okay, if you run it using ChromeDriver:

package com.company;

import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.support.ui.ExpectedConditions;
import org.openqa.selenium.support.ui.WebDriverWait;


public class Main {
    public static void main(String[] args) {
        String url = "https://www.google.com/maps/dir/40.4515849,-3.6903752/41.380896,2.1228198/@40.4515849,-3.6903752/am=t/?hl=en";

        WebDriver driver = new ChromeDriver();
        driver.get(url);

        // open print dropdown
        WebDriverWait wait = new WebDriverWait(driver, 10);
        wait.until(ExpectedConditions.elementToBeClickable(By.cssSelector("button.print-button"))).click();

        // click print button
        WebElement printButton = driver.findElement(By.cssSelector("button.print-popup-button"));
        printButton.click();

        // now what? 
    }
}

You'll see the Chrome Print Preview dialog, which is, unfortunately, out of scope for selenium:

But, there is a hope, if you examine available Chrome arguments, you would see that there is the relevant one:

--disable-print-preview - Disables print preview (For testing, and for users who don't like us. :[ )

Okay, let's try it out:

ChromeOptions options = new ChromeOptions();
options.addArguments("--disable-print-preview");

WebDriver driver = new ChromeDriver(options);
driver.get(url);

Now, there is a system print dialog being shown:

Selenium cannot control it too. So, nope, there is no hope. Oh, wait!

Okay, if we are out of scope of selenium, let's use tools that can help us to click that Print button in the dialog - Robot class:

This class is used to generate native system input events for the purposes of test automation, self-running demos, and other applications where control of the mouse and keyboard is needed.

We'll initialize the Robot and will send Enter key when the print dialog would show up:

package com.company;

import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.support.ui.ExpectedConditions;
import org.openqa.selenium.support.ui.WebDriverWait;

import java.awt.*;
import java.awt.event.KeyEvent;


public class Main {
    public static void main(String[] args) throws AWTException, InterruptedException {
        String url = "https://www.google.com/maps/dir/40.4515849,-3.6903752/41.380896,2.1228198/@40.4515849,-3.6903752/am=t/?hl=en";

        Robot r = new Robot();
        r.delay(1000);

        WebDriver driver = new ChromeDriver();
        driver.get(url);

        // open print dropdown
        WebDriverWait wait = new WebDriverWait(driver, 10);
        wait.until(ExpectedConditions.elementToBeClickable(By.cssSelector("button.print-button"))).click();

        // click print button
        WebElement printButton = driver.findElement(By.cssSelector("button.print-popup-button"));
        printButton.click();

        Thread.sleep(2000);

        r.keyPress(KeyEvent.VK_ENTER);
        r.keyRelease(KeyEvent.VK_ENTER);
    }
}

Other options are to use:

  • sikuli - you would need an image of the print button in order for sikuli to locate it and click
  • autoit

Also see:

  • How to handle print dialog in Selenium?

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