Question

我试图在Firefox浏览器上使用selenium webdriver 2.47.0版本中添加的WebElement＃getScreenShotAs（OutputType.FILE）功能的代码

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Exception in thread "main" org.openqa.selenium.UnsupportedCommandException: Unrecognized command: GET /session/e796089b-1d64-4590-9157-a0716a57e399/screenshot/%7B4329461b-5e9c-4f8b-b589-ddc1af1d55a6%7D
Command duration or timeout: 16 milliseconds
Build info: version: '2.52.0', revision: '4c2593cfc3689a7fcd7be52549167e5ccc93ad28', time: '2016-02-11 11:22:43'
System info: host: 'mrunal-laptop', ip: '192.168.56.1', os.name: 'Windows 7', os.arch: 'amd64', os.version: '6.1', java.version: '1.8.0_45'
Driver info: org.openqa.selenium.firefox.FirefoxDriver
Capabilities [{applicationCacheEnabled=true, rotatable=false, handlesAlerts=true, databaseEnabled=true, version=41.0.2, platform=WINDOWS, nativeEvents=false, acceptSslCerts=true, webStorageEnabled=true, locationContextEnabled=true, browserName=firefox, takesScreenshot=true, javascriptEnabled=true, cssSelectorsEnabled=true}]
Session ID: e796089b-1d64-4590-9157-a0716a57e399
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
    at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:206)
    at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:158)
    at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:678)
    at org.openqa.selenium.remote.RemoteWebElement.execute(RemoteWebElement.java:327)
    at org.openqa.selenium.remote.RemoteWebElement.getScreenshotAs(RemoteWebElement.java:447)
    at thirdsession.GetProperties.main(GetProperties.java:20)

..但我得到了以下异常：

{{1}}

Answer 1

错误的真正原因是许多/大多数WebDriver实现do not actually support element-based screenshots，尽管WebElement扩展了TakesScreenshot since 2.47.0。也许有一天这会改变。

如果你想要截图，你需要在整个浏览器级别进行，在这种情况下 - 正如其他答案所有 - 你需要传递WebDriver实例。

File ssFile = ((TakesScreenshot)(driver)).getScreenshotAs(OutputType.FILE);

严格来说，您应该执行以下操作，因为并非所有驱动程序都支持屏幕截图，例如HtmlUnitDriver。

if (!(getDriver() instanceof TakesScreenshot)) {
    File ssFile = ((TakesScreenshot)(driver)).getScreenshotAs(OutputType.FILE);
    // ...
}

单元素截图有其他解决方案，但它们不可避免地涉及全浏览器屏幕截图的裁剪。例如，请参阅：https://stackoverflow.com/a/13834607/954442

更新：只是为了澄清这不是一个错误，虽然元素截图是part of the W3C WebDriver spec，但不同的浏览器有不同级别的合规性/覆盖率，就我而言知道此功能仅为supported by Microsoft Edge。

Answer 2

不要从建议中导入这些lib，

import org.eclipse.jetty.server.Response.OutputType;

import org.seleniumhq.jetty9.server.Response.OutputType;

导入这些库。

导入org.openqa.selenium.OutputType;

Answer 3

~~getScreenShotAs()方法未定义为WebElement接口的一部分。相反，它作为TakesScreenshot界面的一部分包含在内。~~如果您想截取屏幕截图并将其保存到文件中，请尝试以下操作：

File file = ((TakesScreenshot)driver).getScreenshotAs(OutputType.FILE);

Answer 4

它应该是这样的。

package my.addMedicine;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
import java.sql.ResultSet;
import javax.swing.JOptionPane;


public class addMedicine extends javax.swing.JFrame {

    Connection con;
    Statement stmt;
    ResultSet rs;


public addMedicine()
{
    initComponents();
    DoConnect();
}

private void DoConnect(){
    try 
        {
            String host = "jdbc:derby://localhost:1527/Add Medicine";
            String uName = "apandia";
            String uPass = "olympics2012";
            con = DriverManager.getConnection(host, uName, uPass);

            stmt = con.createStatement();
            String SQL = "SELECT * FROM Add Medicine";
            rs = stmt.executeQuery (SQL);

            rs.next();

            String NAMEMEDICINE = rs.getString("NAMEMEDICINE");
            int MGDOSAGE_col = rs.getInt("MGDOSAGE");
            String MGDOSAGE = Integer.toString( MGDOSAGE_col );
            String DAYS = rs.getString("DAYS");
            int NUMBERTIMES_col = rs.getInt("NUMBERTIMES");
            String NUMBERTIMES = Integer.toString( NUMBERTIMES_col );

            textNAMEMEDICINE.setText(NAMEMEDICINE);
            textDose.setText(MGDOSAGE);
            textDAYS.setText(DAYS);
            textNUMBERTIMES.setText(NUMBERTIMES);

        }
    catch (SQLException err)
    {
        JOptionPane.showMessageDialog(this, err.getMessage());
    }
}

用

替换上面的代码

File screenS = ((TakesScreenshot)(driver)).getScreenshotAs(OutputType.FILE);
FileUtils.copyFile(screenS, new File("C:\\akshay\\del\\screenshots\\1.jpg"));

WebElement #getScreenShotAs（OutputType.File）无法正常工作

4 个答案: