TIKA - Extraindo Documento de Texto

A seguir está o programa para extrair conteúdo e metadados de um documento de texto -

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.sax.BodyContentHandler;
import org.apache.tika.parser.txt.TXTParser;

import org.xml.sax.SAXException;

public class TextParser {

   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.txt"));
      ParseContext pcontext=new ParseContext();
      
      //Text document parser
      TXTParser  TexTParser = new TXTParser();
      TexTParser.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));
      }
   }
}

Salve o código acima como TextParser.javae compilá-lo a partir do prompt de comando usando os seguintes comandos -

javac TextParser.java
java TextParser

Abaixo está o instantâneo do arquivo sample.txt -

O documento de texto tem as seguintes propriedades -

Se você executar o programa acima, terá a seguinte saída.

Output -

Contents of the document:

At tutorialspoint.com, we strive hard to provide quality tutorials for self-learning 
purpose in the domains of Academics, Information Technology, Management and Computer 
Programming Languages.
The endeavour started by Mohtashim, an AMU alumni, who is the founder and the managing 
director of Tutorials Point (I) Pvt. Ltd. He came up with the website tutorialspoint.com 
in year 2006 with the help of handpicked freelancers, with an array of tutorials for 
computer programming languages.

Metadata of the document:

Content-Encoding:   windows-1252
Content-Type:   text/plain; charset = windows-1252