在java中使用xpath和selenium解析HTML表格数据

2022-01-16 00:00:00 selenium xpath webdriver html java

我想获取数据并在没有标签的情况下对其进行组织.它看起来像这样

I want to take the data and organize it without the tags. It looks something like this 

<table class="SpecTable">
    <col width="40%" />
    <col width="60%" />
    <tr>
        <td class="LightRowHead">Optical Zoom:</td>
        <td class="LightRow">15x</td>
    </tr>
    <tr>
        <td class="DarkRowHead">Digital Zoom:</td>
        <td class="DarkRow">6x</td>
    </tr>
    <tr>
        <td class="LightRowHead">Battery Type:</td>
        <td class="LightRow">Alkaline</td>
    </tr>
    <tr>
        <td class="DarkRowHead">Resolution Megapixels:</td>
        <td class="DarkRow">14 MP</td>
    </tr>
</table>

我希望能够提取所有信息字符串，以便我可以将其存储在纯文本文件中:

and I want to be able to extract all the strings of information so that I can store in a plaintext file with just this:

光学变焦:15 倍数码变焦:6 倍电池类型:碱性分辨率百万像素:14 MP

Optical Zoom: 15x Digital Zoom: 6x Battery Type: Alkaline Resolution Megapixels: 14 MP

public static void main(String[] args) {

        FirefoxProfile profile = new FirefoxProfile();
        profile.setPreference("general.useragent.override", "some UA string");
        WebDriver driver = new FirefoxDriver(profile);

        String Url = "http://www.walmart.com/ip/Generic-14-MP-X400-BK/19863348";
        driver.get(Url);
        List<WebElement> resultsDiv = driver.findElements(By.xpath("//table[contains (@class,'SpecTable')//td"));

        System.out.println(resultsDiv.size());
        for (int i=0; i<resultsDiv.size(); i++) {
            System.out.println(i+1 + ". " + resultsDiv.get(i).getText());
        }

我正在使用 Selenium 进行 Java 编程，但我无法为它找出正确的 XPath 表达式.

I am programming in Java with Selenium and I cannot figure out the correct XPath expression for it.

有人能弄清楚我为什么会犯错，或许能给我一些关于如何正确解析这些数据的指示吗?我对 Selenium 和 XPaths 很陌生，但我需要这个来工作.

Can someone figure out why I err on this and maybe give me some pointers on how I can parse this data correctly? Im very new to Selenium and XPaths but I need this for work.

另外，如果有人有任何好的资源让我快速学习 Selenium 和 XPath，我们也将不胜感激！

Also if anyone has any good sources for me to learn Selenium and XPath fast, those would also be greatly appreciated!

推荐答案

这可能会满足您的需求:

Probably this will suite your needs: 

string text = driver.findElement(By.cssSelector("table.SpecTable")).getText();

String text 将包含来自具有类 SpecTable 的表的所有文本节点.我更喜欢使用 css，因为它受 IE 支持并且比 xpath 更快.但是对于 xpath 教程，请尝试 this 和 这个.

String text will contain all text nodes from the table with class SpecTable. I prefer using css, because it's supported by IE and faster than xpath. But as for xpath tutorials try this and this.

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