我遇到了很多有关js的错误...所以我改成无头的chromedriver，它对特定元素的屏幕截图效果更好，但在其他屏幕截图代码中却出现了错误
Starting ChromeDriver 2.45.615291 (ec3682e3c9061c10f26ea9e5cdcf3c53f3f74387)
on port 44903
Only local connections are allowed.
janv. 31, 2019 7:02:22 AM org.openqa.selenium.remote.ProtocolHandshake createSession
INFOS: Detected dialect: OSS
Exception in thread "AWT-EventQueue-0" java.awt.image.RasterFormatException: (y + height) is outside of Raster
at sun.awt.image.ByteInterleavedRaster.createWritableChild(Unknown Source)
at java.awt.image.BufferedImage.getSubimage(Unknown Source)
at CarteEtdInfo.photoProfile(CarteEtdInfo.java:57)
at Accueil.<init>(Accueil.java:99)
at Login$2.actionPerformed(Login.java:287)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.AbstractButton.doClick(Unknown Source)
at javax.swing.plaf.basic.BasicRootPaneUI$Actions.actionPerformed(Unknown Source)
at javax.swing.SwingUtilities.notifyAction(Unknown Source)
at javax.swing.JComponent.processKeyBinding(Unknown Source)
at javax.swing.KeyboardManager.fireBinding(Unknown Source)
at javax.swing.KeyboardManager.fireKeyboardAction(Unknown Source)
at javax.swing.JComponent.processKeyBindingsForAllComponents(Unknown Source)
at javax.swing.JComponent.processKeyBindings(Unknown Source)
at javax.swing.JComponent.processKeyEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.KeyboardFocusManager.redispatchEvent(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.dispatchEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$500(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)
这是类CarteEtdInfo中有错误的代码
public void photoProfile() throws IOException {
String cookie = String.join("\n",Files.readAllLines(Paths.get("temp\\cookie.txt")));
Login webpage = new Login();
WebDriver pagee = webpage.driver;
pagee.get("https://www4.inscription.tn/ORegMx/servlet/AuthentificationEtud?Idsession="+cookie+"&action1=toCarteEtd");
// Get entire page screenshot
WebElement taswira = driver.findElement(By.xpath("/html[1]/body[1]/table[1]/tbody[1]/tr[1]/td[1]/table[1]/tbody[1]/tr[1]/td[1]/table[2]/tbody[1]/tr[4]/td[1]/div[2]/div[1]/table[2]/tbody[1]/tr[2]/td[1]/img[1]"));
File screenshot = ((TakesScreenshot) driver).getScreenshotAs(OutputType.FILE);
BufferedImage fullImg = null;
try {
fullImg = ImageIO.read(screenshot);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// Get the location of element on the page
org.openqa.selenium.Point point = taswira.getLocation();
// Get width and height of the element
int eleWidth = taswira.getSize().getWidth();
int eleHeight = taswira.getSize().getHeight();
// Crop the entire page screenshot to get only element screenshot
BufferedImage eleScreenshot = fullImg.getSubimage(point.getX(), point.getY(), eleWidth, eleHeight); // line 57
try {
ImageIO.write(eleScreenshot, "png", screenshot);
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
// Copy the element screenshot to disk
File screenshotLocation = new File("temp\\avatar.png");
try {
FileUtils.copyFile(screenshot, screenshotLocation);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
这是第57行
BufferedImage eleScreenshot = fullImg.getSubimage(point.getX(), point.getY(), eleWidth, eleHeight);
屏幕快照的先前代码可以在Login类中的一个元素上正常工作，那么为什么这个有问题？
chromedriver不是无头的也可以，但无头的不是
最佳答案
无头chrome的默认窗口大小可能小于预期的大小，这可能会导致您的元素在窗口之外，因此不可见。您可以自己设置寡妇的大小，也可以使用以下方法最大化窗口:
chromeOptions.addArguments(""--start-maximized")