TIKA - Extracting JAR File


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Given below is the program to extract content and metadata from a Java Archive (jar) file:


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.pkg.PackageParser;

import org.xml.sax.SAXException;

public class PackageParse {

   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.jar"));
      ParseContext pcontext = new ParseContext();
      
      //Package parser
      PackageParser packageparser = new PackageParser();
      packageparser.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 PackageParse.java, and compile it from the command prompt by using the following commands:

javac PackageParse.java
java PackageParse 

Here we are passing the jar file of the following Example.java file.

JAVA Example

The jar file has the following properties:

JAR Example

After executing the above program you will get the following output.

Output:

Contents of the document:
META-INF/MANIFEST.MF
tutorialspoint/tika/examples/Example.class

Metadata of the document:
Content-Type:   application/zip


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