get Manifest from Jar file - Java Reflection

Java examples for Reflection:Jar

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Description

get Manifest from Jar file

Demo Code


//package com.java2s;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.jar.JarFile;
import java.util.jar.Manifest;

public class Main {
    public static Manifest getManifest(File f) {
        try {//from  w w w .  jav a  2  s . c o m
            if (f.exists()
                    && f.isFile()
                    && (f.getName().endsWith(".jar") || f.getName()
                            .endsWith(".zip"))) {
                JarFile jarFile = new JarFile(f);
                return jarFile.getManifest();
            } else if (f.exists() && f.isDirectory()) {
                File mf = new File(f.getPath() + File.separator
                        + "META-INF" + File.separator + "MANIFEST.MF");
                if (mf.exists() && mf.isFile()) {
                    return new Manifest(new FileInputStream(mf));
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }
}

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