TIKA - 提取 JAR 文件

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下面给出的是从 Java Archive (jar) 文件中提取内容和元数据的程序 -

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));
      }
   }
}

将上述代码保存为PackageParse.java，并使用以下命令从命令提示符编译它 -

javac PackageParse.java
java PackageParse 

下面给出的是驻留在包内的 Example.java 的快照。

jar 文件具有以下属性 -

执行上述程序后，它将给出以下输出 -

输出-

Contents of the document:

META-INF/MANIFEST.MF
tutorialspoint/tika/examples/Example.class

Metadata of the document:

Content-Type:   application/zip