JAR Archives: Jar Lister
import java.io.IOException; import java.util.Date; import java.util.Enumeration; import java.util.jar.Attributes; import java.util.jar.JarEntry; import java.util.jar.JarFile; import java.util.zip.ZipEntry; public class Main { public static void main(String[] args) throws IOException { JarFile jf = new JarFile("a.jar"); Enumeration e = jf.entries(); while (e.hasMoreElements()) { JarEntry je = (JarEntry) e.nextElement(); System.out.println(je.getName()); long uncompressedSize = je.getSize(); long compressedSize = je.getCompressedSize(); long crc = je.getCrc(); int method = je.getMethod(); String comment = je.getComment(); System.out.println(new Date(je.getTime())); System.out.println("from " + uncompressedSize + " bytes to "+ compressedSize); if (method == ZipEntry.STORED) { System.out.println("ZipEntry.STORED"); } else if (method == ZipEntry.DEFLATED) { System.out.println(ZipEntry.DEFLATED); } System.out.println("Its CRC is " + crc); System.out.println(comment); System.out.println(je.isDirectory()); Attributes a = je.getAttributes(); if (a != null) { Object[] nameValuePairs = a.entrySet().toArray(); for (int j = 0; j < nameValuePairs.length; j++) { System.out.println(nameValuePairs[j]); } } System.out.println(); } } }