昨天我们已经在windows/mac上配置好了 playwrigt框架，今天来写代码看看该框架怎么运行。

  在写第一段代码之前，补充下上次没有讲完 playwright框架的优点。跨浏览器、跨平台、跨语言、可测试的移动网络。适用于Android和Mobile safiri的Google Chrome 原生移动仿真。相同的渲染引擎适用于桌面和云端。小程序目前还没有尝试。

  第一次使用时，需要下载对应各个系统的浏览器，具体代码如下:

我把代码copy出来，一行一行地分析下:

public class PlaywrightInstall {
   public static void main(String[] args) throws InterruptedException {
       try (Playwright playwright = Playwright.create()) {
           BrowserType chromium = playwright.chromium();           // Can be "msedge", "chrome-beta", "msedge-beta", "msedge-dev", etc.           Browser browser = chromium.launch(new BrowserType.LaunchOptions().setHeadless(false).setChannel("chrome"));           Page page = browser.newPage();           page.navigate("https://www.baidu.com");           Thread.sleep(5000);//            page.navigate("https://lpt.liepin.com");//            Thread.sleep(3000);       } catch (InterruptedException e) {
           e.printStackTrace();       }

==========================================

Playwright playwright = Playwright.create()

调用Playwright包中create()方法，返回了PlaywrightImpl类中的create()方法

PlaywrightImpl类中包含多种浏览器和api

BrowserType chromium = playwright.chromium();

指定谷歌浏览器作为测试浏览器

Browser browser = chromium.launch(new BrowserType.LaunchOptions().setHeadless(false).setChannel("chrome"));

设置浏览器的样式，无头模式

Page page = browser.newPage();

定义浏览器的页面

page.navigate("https://www.baidu.com");

浏览器地址为: https://www.baidu.com

Thread.sleep(5000);

进程沉睡5秒，页面因为网络等原因，一般都会有loading时间

加上这段代码后，就需要加上catch来捕捉异常

下面我们来运行下这段代码，看看什么效果

运行后会下载chromium浏览器的二进制文件

Build日志如下:

Executing pre-compile tasks...

Running 'before' tasks

Checking sources

Copying resources... [playwrightDemo]

Parsing java… [playwrightDemo]

Writing classes… [playwrightDemo]

Checking dependencies… [playwrightDemo]

Dependency analysis found 0 affected files

Updating dependency information… [playwrightDemo]

Adding nullability assertions… [playwrightDemo]

Adding threading assertions… [playwrightDemo]

Adding pattern assertions… [playwrightDemo]

Running 'after' tasks

javac 8 was used to compile java sources

Finished, saving caches…

Executing post-compile tasks...

Finished, saving caches…

Synchronizing output directories...

2023/5/27 10:38 - Build completed successfully in 2 sec, 957 ms

浏览器会被调用 百度网页展示

=====================================

如果我想先后打开两个浏览器，应该怎么写代码呢？

package org.example;import com.microsoft.playwright.Browser;import com.microsoft.playwright.BrowserType;import com.microsoft.playwright.Page;import com.microsoft.playwright.Playwright;public class PlaywrightInstall {
   public static void main(String[] args) throws InterruptedException {
       try (Playwright playwright = Playwright.create()) {
               BrowserType chromium = playwright.chromium();           // Can be "msedge", "chrome-beta", "msedge-beta", "msedge-dev", etc.           Browser browser = chromium.launch(new BrowserType.LaunchOptions().setHeadless(false).setChannel("chrome"));           Page page = browser.newPage();           page.navigate("https://www.baidu.com");           Thread.sleep(5000);//            page.navigate("https://lpt.liepin.com");//            Thread.sleep(3000);       } catch (InterruptedException e) {
           e.printStackTrace();       }

       //Thread.sleep(3000);       PlaywrightInstall playwrightInstall = new PlaywrightInstall();       playwrightInstall.PlaywrightBrower();   }

   public void PlaywrightBrower() {
       try {
           Playwright playwright = Playwright.create();           BrowserType browserType = playwright.chromium();           Browser browser = browserType.launch(new BrowserType.LaunchOptions().setHeadless(false).setChannel("chrome"));           Page page = browser.newPage();           page.navigate("https://www.163.com");           Thread.sleep(1000);           System.out.println(page.title());       } catch (InterruptedException e){
           e.printStackTrace();       }
   }
}

这样就可以调用两个浏览器了

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最后我们尝试下当打开浏览器后，在首页截图这种情况

public void playwrightImage(){
   try (Playwright playwright = Playwright.create()) {
       BrowserType browserType = playwright.chromium();       Browser browser = browserType.launch(new BrowserType.LaunchOptions().setHeadless(false));       Page page = browser.newPage();       page.navigate("https://www.baidu.com");       page.screenshot(new Page.ScreenshotOptions().setPath(Paths.get("PlaywrightInstall.png")));   }
}

截图成功

今天先到这里