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README
Apache-2.0

Jvppeteer

下载最新版本的chromuim Maven Central Issue resolution status Quality Gate Status

本库的灵感来自 Puppeteer(Node.js), API 也与其基本上保持一致,做这个库是为了方便使用 Java 操控 Chrome 或 Chromium

Jvppeteer 通过 DevTools 控制 Chromium 或 Chrome。 默认情况下,以 headless 模式运行,也可以通过配置运行'有头'模式。

你可以在浏览器中手动执行的绝大多数操作都可以使用 Jvppeteer 来完成! 下面是一些示例:

  • 生成页面 PDF。
  • 抓取 SPA(单页应用)并生成预渲染内容(即“SSR”(服务器端渲染))。
  • 自动提交表单,进行 UI 测试,键盘输入等。
  • 创建一个时时更新的自动化测试环境。 使用最新的 JavaScript 和浏览器功能直接在最新版本的 Chrome 中执行测试。
  • 捕获网站的 timeline trace,用来帮助分析性能问题。
  • 测试浏览器扩展。

开始使用

以下是使用依赖管理工具(如 maven 或 gradle)的简要指南。

Maven

要使用 maven,请将此依赖添加到pom.xml文件中:

<dependency>
  <groupId>io.github.fanyong920</groupId>
  <artifactId>jvppeteer</artifactId>
  <version>1.1.3</version>
</dependency>

Gradle

要使用 Gradle,请将 Maven 中央存储库添加到您的存储库列表中:

mavenCentral()

然后,您可以将最新版本添加到您的构建中。

compile "io.github.fanyong920:jvppeteer:1.1.3"

Logging

该库使用 SLF4J 进行日志记录,并且不附带任何默认日志记录实现。

调试程序将日志级别设置为 TRACE。

独立 jar

如果您不使用任何依赖项管理工具,则可以在此处找到最新的独立 jar 。

快速开始

1、启动浏览器

	//设置基本的启动配置,这里选择了‘有头’模式启动
	ArrayList<String> argList = new ArrayList<>();
    //自动下载,第一次下载后不会再下载
    BrowserFetcher.downloadIfNotExist(null);
    LaunchOptions options = new LaunchOptionsBuilder().withArgs(argList).withHeadless(false).build();
    argList.add("--no-sandbox");
    argList.add("--disable-setuid-sandbox");
    Puppeteer.launch(options);

在这个例子中,我们明确指明了启动路径,程序就会根据指明的路径启动对应的浏览器,如果没有明确指明路径,那么程序会尝试启动默认安装路径下的 Chrome 浏览器

2、导航至某个页面

	//自动下载,第一次下载后不会再下载
    BrowserFetcher.downloadIfNotExist(null);
    ArrayList<String> argList = new ArrayList<>();
    LaunchOptions options = new LaunchOptionsBuilder().withArgs(argList).withHeadless(false).build();
    argList.add("--no-sandbox");
    argList.add("--disable-setuid-sandbox");
    Browser browser = Puppeteer.launch(options);
    Browser browser2 = Puppeteer.launch(options);
    Page page = browser.newPage();
    page.goTo("https://www.taobao.com/about/");
    browser.close();

    Page page1 = browser2.newPage();
    page1.goTo("https://www.taobao.com/about/");

这个例子中,浏览器导航到具体某个页面后关闭。在这里并没有指明启动路径。argList是放一些额外的命令行启动参数的,在下面资源章节中我会给出相关资料。

3、生成页面的 PDF

	//自动下载,第一次下载后不会再下载
    BrowserFetcher.downloadIfNotExist(null);
    ArrayList<String> arrayList = new ArrayList<>();
    //生成pdf必须在无厘头模式下才能生效
    LaunchOptions options = new LaunchOptionsBuilder().withArgs(arrayList).withHeadless(true).build();
    arrayList.add("--no-sandbox");
    arrayList.add("--disable-setuid-sandbox");
    Browser browser = Puppeteer.launch(options);
    Page page = browser.newPage();
    page.goTo("https://www.baidu.com/?tn=98012088_10_dg&ch=3");
    PDFOptions pdfOptions = new PDFOptions();
    pdfOptions.setPath("test.pdf");
    page.pdf(pdfOptions);
    page.close();
    browser.close();

在这个例子中,导航到某个页面后,将整个页面截图,并写成PDF文件。注意,生成PDF必须在headless模式下才能生效

4、TRACING 性能分析

	//自动下载,第一次下载后不会再下载
    BrowserFetcher.downloadIfNotExist(null);
    ArrayList<String> argList = new ArrayList<>();
    LaunchOptions options = new LaunchOptionsBuilder().withArgs(argList).withHeadless(true).build();
    argList.add("--no-sandbox");
    argList.add("--disable-setuid-sandbox");
    Browser browser = Puppeteer.launch(options);
    Page page = browser.newPage();
    //开启追踪
    page.tracing().start("C:\\Users\\howay\\Desktop\\trace.json");
    page.goTo("https://www.baidu.com/?tn=98012088_10_dg&ch=3");
    page.tracing().stop();

在这个例子中,将在页面导航完成后,生成一个 json 格式的文件,里面包含页面性能的具体数据,可以用 Chrome 浏览器开发者工具打开该 json 文件,并分析性能。

5、页面截图

    BrowserFetcher.downloadIfNotExist(null);       
    ArrayList<String> arrayList = new ArrayList<>();
    LaunchOptions options = new LaunchOptionsBuilder().withArgs(arrayList).withHeadless(true).build();
    arrayList.add("--no-sandbox");
    arrayList.add("--disable-setuid-sandbox");
    Browser browser = Puppeteer.launch(options);
    Page page = browser.newPage();
    page.goTo("https://www.baidu.com/?tn=98012088_10_dg&ch=3");
    ScreenshotOptions screenshotOptions = new ScreenshotOptions();
    //设置截图范围
    Clip clip = new Clip(1.0,1.56,400,400);
    screenshotOptions.setClip(clip);
    //设置存放的路径
    screenshotOptions.setPath("test.png");
    page.screenshot(screenshotOptions);

页面导航完成后,设置截图范围以及图片保存路径,即可开始截图。

更多的例子请看这里

资源

  1. Puppeteer中文文档
  2. DevTools Protocol
  3. Chrome命令行启动参数

执照

此仓库中找到的所有内容均已获得 Apache 许可。有关详细信息,请参见LICENSE文件

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Java Headless 浏览器 抓取页面 展开 收起
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