how to extract web page textual content in java? [closed]

Answer 1

Use a HTML parser if at all possible; there are many available for Java.

Or you can use regex like many people do. This is generally not advisable, however, unless you're doing very simplistic processing.

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Text extraction:

• Text Extraction from HTML Java
• Text extraction with java html parsers

Tag stripping:

• Stripping HTML tags in Java
• How to strip HTML attributes except “src” and “alt” in JAVA
• Removing HTML from a Java String

Answer 2

Use jsoup. This is currently the most elegant library for screen scraping.

URL url = new URL("http://example.com/");
Document doc = Jsoup.parse(url, 3*1000);
String title = doc.title();

I just love its CSS selector syntax.

Answer 3

Here's a short method that nicely wraps these details (based on java.util.Scanner):

public static String get(String url) throws Exception {
   StringBuilder sb = new StringBuilder();
   for(Scanner sc = new Scanner(new URL(url).openStream()); sc.hasNext(); )
      sb.append(sc.nextLine()).append('\n');
   return sb.toString();
}

And this is how it is used:

public static void main(String[] args) throws Exception {
   System.out.println(get("http://www.yahoo.com"));
}