java remove html

Java is a widely used programming language that can be used to develop various types of applications. In many applications, text needs to be processed, and one of the common problems is how to remove HTML tags. HTML markup is a code language used to mark up text and other content in web pages, but if the text needs to be processed or applied elsewhere, the markup needs to be removed. This article will discuss how to remove HTML tags using Java.

1. Use regular expressions to remove HTML tags

In Java, you can use regular expressions to match and replace text. Therefore, HTML tags can be removed using regular expressions. Here is a sample code:

import java.util.regex.Pattern;
import java.util.regex.Matcher;

public class HtmlTagRemover {
  public static void main(String[] args) {
    String html = "<p>这是一段包含HTML标记的文本</p>";
    String noHtml = html.replaceAll("\<.*?\>", "");
    System.out.println(noHtml);
  }
}

In this sample code, use the replaceAll() method to replace all HTML tags with an empty string. The regular expression \3a9222b97599f844590a248794f307e0 matches all strings starting with e9d79f9c74e37b795b8eb7e6ceaf0c6e, that is, HTML mark. This expression uses non-greedy mode, which only matches the shortest string. Therefore, all HTML tags are guaranteed to be removed.

2. Use the Jsoup library to remove HTML tags

In addition to using regular expressions, you can also use the Jsoup library to remove HTML tags. Jsoup is an open source Java HTML parser that can extract data from HTML documents, create DOM documents, and provides some convenient APIs to operate HTML documents. The following is a sample code that uses Jsoup to remove HTML tags:

import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;

public class HtmlTagRemover {
  public static void main(String[] args) {
    String html = "<p>这是一段包含HTML标记的文本</p>";
    Document doc = Jsoup.parse(html);
    Elements elements = doc.select("*");
    for (Element element : elements) {
        element.remove();
    }
    String noHtml = doc.text();
    System.out.println(noHtml);
  }
}

In this sample code, first use the Jsoup.parse() method to convert the HTML text into a Jsoup Document object. Then, use the doc.select("*") method to select all elements. Next, use the element.remove() method to remove all elements. Finally, use the doc.text() method to get the text without HTML tags. Through this method, HTML tags can be easily removed.

3. Conclusion

This article introduces two methods to remove HTML tags: using regular expressions and using the Jsoup library. Both methods are convenient for processing HTML text, and you can choose one of them according to your needs. I hope readers can understand how to remove HTML tags in Java through this article and apply it in practice.

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