Java crawler implementation
In Java, we can use the Jsoup library to simplify the process of network requests and HTML parsing. The following is a simple crawler sample code for grabbing the product information in the Jitterbug mini store.
Maven Dependencies
First, you need to add the Jsoup dependency to your project's files:
Crawler Sample Code
Next, consider the following crawler code example:
import ;
import ;
import ;
public class DouyinShopCrawler {
public static void main(String[] args) {
String url = " // replace with the actual link to the target store
try {
// dispatchHTTPRequesting and fetching web documents
Document doc = (url).get();
// Parsing the required information
for (Element product : (".product-class")) { // Replace the actualCSSpicker
String productId = ("data-id");
String productName = (".product-title").text();
float price = ((".product-price").text().replace("¥", ""));
String seller = (".seller-name").text();
boolean inStock = (".stock-status").text().equals("In Stock");
// Exporting product information
("merchandiseID: " + productId);
("merchandise名称: " + productName);
("prices: " + price);
("seller (of goods): " + seller);
("Availability: " + inStock);
}
} catch (Exception e) {
();
}
}
}
code analysis
Jsoup connection: Use (url).get() to send an HTTP request and get the HTML document.
Data Selection: Use the () method to select a specific product element. You need to replace the CSS selector according to the structure of the actual page.
Data Extraction: Get product information by parsing the attributes or text of an element.
Printout: Output the captured information to the console.
caveat
There are a few key points to keep in mind when doing a data crawl:
Legitimacy: Ensure that you do not violate the Terms of Service of Jitterbug Shop.
Reasonable frequency: Avoid sending requests too quickly to prevent being blocked by the site.
Data Storage: You can save the captured data to a database for future processing.