Wednesday, January 25, 2017

TIKA - Extracting Text Document

Given below is the program to extract content and metadata from a Text 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.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));
      }
   }
}
Save the above code as TextParser.java, and compile it from the command prompt by using the following commands:
javac TextParser.java
java TextParser
Below given is the snap shot of example.txt document:
Simple Document The text document has the following properties:
Document Properties After executing the above program you will get the following output.
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

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