TIKA - 提取 JAR 檔案

以下是從 Java 歸檔 (jar) 檔案中提取內容和元資料的程式 -

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));
      }
   }
}

將上述程式碼另存為 PackageParse.java，然後使用以下命令從命令提示符編譯它 -

javac PackageParse.java
java PackageParse 

以下是位於包中的 Example.java 的快照。

jar 檔案具有以下屬性 -

執行上述程式後，將得到以下輸出 -

輸出 -

Contents of the document:

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

Metadata of the document:

Content-Type:   application/zip