这是我的代码，for循环在（i == 7）失败，但i = 1到6次传递相同的元素。我不知道为什么。 我正在尝试自动化网站下载电子PDF文件。 谁能帮我吗？
public class bookboon {
static WebDriver d ;
public static void main(String[] args) throws Exception {
System.setProperty("webdriver.chrome.driver", "C:\\Users\\User_2\\Downloads\\chromedriver_win32\\chromedriver.exe");
String downloadFilepath = "C:\\Users\\User_2\\Desktop\\bookboon\\";
HashMap<String, Object> chromePrefs = new HashMap<String, Object>();
chromePrefs.put("profile.default_content_settings.popups", 0);
chromePrefs.put("download.default_directory", downloadFilepath);
ChromeOptions options = new ChromeOptions();
options.setExperimentalOption("prefs", chromePrefs);
DesiredCapabilities cap = DesiredCapabilities.chrome();
cap.setCapability(CapabilityType.ACCEPT_SSL_CERTS, true);
cap.setCapability(ChromeOptions.CAPABILITY, options);
d = new ChromeDriver(cap);
d.get("http://bookboon.com/en/accounting-ebooks");
int rowCount = 1;
Row row;
XSSFWorkbook workbook = new XSSFWorkbook();
XSSFSheet sheet = workbook.createSheet("bookboon");
Object[][] Title= {
{"Title","author","Pages","Discription",},
};
for (Object[] aBook : Title) {
row = sheet.createRow(0);
int columnCount = 0;
for (Object field : aBook) {
Cell cell = row.createCell(columnCount++);
if (field instanceof String) {
cell.setCellValue((String) field);
} else if (field instanceof Integer) {
cell.setCellValue((Integer) field);
}
}
}
try (FileOutputStream outputStream = new FileOutputStream("C:\\Users\\User_2\\Desktop\\bookboon\\bookboon_files\\bookboon.xlsx")){
workbook.write(outputStream);
}
List<WebElement> downlinks = d.findElements(By.className("pdf"));
for(int i=1;i<=downlinks.size();i++) { // problem is when it comes to i==7.
downlinks.get(i).click();
if(i>=2) {
d.findElement(By.xpath("html/body/div[1]/div/article/div/section[1]/form/div[3]/a")).click();//loop fails here
d.findElement(By.id("email")).sendKeys("asd@ymail.com");
WebElement One=d.findElement(By.xpath("html/body/div[1]/div/article/div/section[1]/form/div[2]/div[2]/div[1]/input"));
One.sendKeys("Studying");
One.sendKeys(Keys.TAB);
WebElement Two=d.findElement(By.xpath("html/body/div[1]/div/article/div/section[1]/form/div[2]/div[2]/div[2]/input"));
Two.sendKeys("Engineer/Science MSc");
Two.sendKeys(Keys.TAB);
WebElement Three=d.findElement(By.xpath("html/body/div[1]/div/article/div/section[1]/form/div[2]/div[2]/div[3]/input"));
Three.sendKeys("All India Institute of Medical Sciences (AIIMS), Delhi");
Three.sendKeys(Keys.TAB);
d.findElement(By.xpath(".//*[@id='download']/form/button")).click();
}
else {
d.findElement(By.id("email")).sendKeys("asd@ymail.com");
WebElement One=d.findElement(By.xpath("html/body/div[1]/div/article/div/section[1]/form/div[2]/div[2]/div[1]/input"));
One.sendKeys("Studying");
One.sendKeys(Keys.TAB);
WebElement Two=d.findElement(By.xpath("html/body/div[1]/div/article/div/section[1]/form/div[2]/div[2]/div[2]/input"));
Two.sendKeys("Engineer/Science MSc");
Two.sendKeys(Keys.TAB);
WebElement Three=d.findElement(By.xpath("html/body/div[1]/div/article/div/section[1]/form/div[2]/div[2]/div[3]/input"));
Three.sendKeys("All India Institute of Medical Sciences (AIIMS), Delhi");
Three.sendKeys(Keys.TAB);
d.findElement(By.xpath(".//*[@id='download']/form/button")).click();
}
Thread.sleep(1000);
d.navigate().back();
try {
WebElement l1 =d.findElement(By.xpath("html/body/div[1]/div/article/div[2]/article["+i+"]/a/h3")) ;
WebElement l2 =d.findElement(By.xpath("html/body/div[1]/div/article/div[2]/article["+i+"]/a/div[1]")) ;
WebElement l3 =d.findElement(By.xpath("html/body/div[1]/div/article/div[2]/article["+i+"]/a/div[2]/span[4]")) ;
WebElement l4 =d.findElement(By.xpath("html/body/div[1]/div/article/div[2]/article["+i+"]/a/p")) ;
Object[][] bookData = {
{l1.getText(),l2.getText(),l3.getText(),l4.getText()},
};
for (Object[] aBook : bookData) {
row = sheet.createRow(rowCount);
// System.out.println("before "+rowCount);
rowCount = rowCount+1 ;
// System.out.println("after "+rowCount);
int columnCount = 0;
for (Object field : aBook) {
Cell cell = row.createCell(columnCount++);
if (field instanceof String) {
cell.setCellValue((String) field);
} else if (field instanceof Integer) {
cell.setCellValue((Integer) field);
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
try (FileOutputStream outputStream = new FileOutputStream("C:\\Users\\User_2\\Desktop\\bookboon\\bookboon_files\\bookboon.xlsx"))
{
workbook.write(outputStream);
}
downlinks = d.findElements(By.className("pdf"));
}
}
我已经提到过我的代码中循环失败的地方。 我也尝试了不同的方法来使它变好，我感到难过，我无法解决它。
错误：启动ChromeDriver 2.32.498550 （9dec58e66c31bcc53a9ce3c7226f0c1c5810906a）在14875港口只有当地的 允许连接。 log4j：WARN找不到appender logger（org.apache.http.client.protocol.RequestAddCookies）。 log4j的：WARN 请正确初始化log4j系统。 log4j：警告请参阅 http://logging.apache.org/log4j/1.2/faq.html#noconfig了解更多信息。 线程“main”中的异常org.openqa.selenium.WebDriverException： 未知错误：元素...无法点击 点（675,505）。其他元素将收到点击： ...（会话信息：chrome = 61.0.3163.100）（驱动程序信息： chromedriver = 2.32.498550 （9dec58e66c31bcc53a9ce3c7226f0c1c5810906a），platform = Windows NT 6.1.7600 x86_64）（警告：服务器未提供任何堆栈跟踪信息） 命令持续时间或超时：47毫秒
答案 0 :(得分：2)
在这些代码行中：
List<WebElement> downlinks = d.findElements(By.className("pdf"));
for(int i=1;i<=downlinks.size();i++) {
downlinks.get(i).click();
downlinks.get(i)获取索引i的元素。索引以0开头，因此最后一个元素位于索引size() - 1。以下是发生的事情：
downlinks.get(0) // first element
downlinks.get(1) // second element, you started here
// . . .
downlinks.get(downlinks.size() - 1) // last element
downlinks.get(downlinks.size()) // out of bounds, you stopped here
快速修复只是替换
for(int i=1;i<=downlinks.size();i++) {
与
for(int i = 0;i < downlinks.size();i++) {