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Wednesday, January 25, 2017

TIKA - Extracting HTML Document

Given below is the program to extract content and metadata from an HTML document.
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

import org.apache.tika.exception.TikaException;
import org.apache.tika.metadata.Metadata;
import org.apache.tika.parser.ParseContext;
import org.apache.tika.parser.html.HtmlParser;
import org.apache.tika.sax.BodyContentHandler;

import org.xml.sax.SAXException;

public class HtmlParse {

   public static void main(final String[] args) throws IOException,SAXException, TikaException {

      //detecting the file type
      BodyContentHandler handler = new BodyContentHandler();
      Metadata metadata = new Metadata();
      FileInputStream inputstream = new FileInputStream(new File("example.html"));
      ParseContext pcontext = new ParseContext();
      
      //Html parser 
      HtmlParser htmlparser = new HtmlParser();
      htmlparser.parse(inputstream, handler, metadata,pcontext);
      System.out.println("Contents of the document:" + handler.toString());
      System.out.println("Metadata of the document:");
      String[] metadataNames = metadata.names();
      
      for(String name : metadataNames) {
         System.out.println(name + ":   " + metadata.get(name));  
      }
   }
}
Save the above code as HtmlParse.java, and compile it from the command prompt by using the following commands:
javac HtmlParse.java
java HtmlParse 
Below given is the snapshot of example.html document.
example The HTML document has the following properties:
Document Properties1 After executing the above program you will get the following output.
Output:
Contents of the document:
 Name                      Salary     age
 Ramesh Raman              50000     20
 Shabbir Hussein              70000          25
 Umesh Raman              50000     30
 Somesh                      50000     35
Metadata of the document:
title:   HTML Table Header
Content-Encoding:   windows-1252
Content-Type:   text/html; charset=windows-1252
dc:title:   HTML Table Header

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