Скачать или смотреть How to Iterate div Inside ul Tag Using Jsoup in Java

Learn how to effectively iterate over ` div ` elements inside a ` ul ` tag using Jsoup in Java, and how to extract valuable attributes like `href` and `title`.
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This video is based on the question https://stackoverflow.com/q/66615001/ asked by the user 'Kevin Valdez' ( https://stackoverflow.com/u/6692088/ ) and on the answer https://stackoverflow.com/a/66617145/ provided by the user 'Krystian G' ( https://stackoverflow.com/u/9889778/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Iterate <div> Inside <ul> Tag Using Jsoup in Java

In web development, extracting data from HTML can sometimes pose a challenge. One common scenario is to extract certain elements nested inside other tags. In this guide, we will explore how to iterate over <div> elements located within a <ul> tag using the Jsoup library in Java. This process allows us to retrieve attributes like href and title, which can be extremely useful in various web scraping applications.

Understanding the Problem

Imagine you have a block of HTML code, structured as follows:

[[See Video to Reveal this Text or Code Snippet]]

The goal is to iterate through all <div class="product-item"> elements and extract the properties of the <a class="thumb"> tags nested within.

Setting Up the Jsoup Selector

In your initial approach, you might have structured your code like this:

[[See Video to Reveal this Text or Code Snippet]]

Common Mistakes to Avoid

Improper Use of Selectors:

The first selector, "ul.product__listing product__grid", contains a space. This means you are looking for an <ul> with the class product__listing and inside it, an element with the class product__grid. Instead, you should combine the classes without a space: "ul.product__listing.product__grid".

Incorrectly Targeting <ul> Tags:

The second selector uses "ul.product-item" which is flawed because you are already inside a <ul>. You should only use the class name to select: ".product-item".

Correcting the Code

Let’s rectify these issues with the correct code snippet:

[[See Video to Reveal this Text or Code Snippet]]

Expected Output

If the corrected code is executed properly, the output will successfully display the titles and links of the products:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

By understanding how to effectively use Jsoup, you can simplify the process of extracting data from HTML documents in Java. By following the above guidelines, you can avoid common pitfalls and retrieve valuable information, enhancing your web scraping projects.

Feel free to leave any questions or comments below, and happy coding!