Java zip中创建文件夹 java zip添加文件

import java.io.File;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import java.util.Enumeration;

import java.util.zip.ZipEntry;

import java.util.zip.ZipFile;

import java.util.zip.ZipOutputStream;

  
public class Main {

  
    // 4MB buffer

    private static final byte[] BUFFER = new byte[4096 * 1024];

  
    /**

     * copy input to output stream - available in several StreamUtils or Streams classes  
     */    

    public static void copy(InputStream input, OutputStream output) throws IOException {

        int bytesRead;

        while ((bytesRead = input.read(BUFFER))!= -1) {

            output.write(BUFFER, 0, bytesRead);

        }

    }

  
    public static void main(String[] args) throws Exception {

        // read war.zip and write to append.zip

        ZipFile war = new ZipFile("war.zip");

        ZipOutputStream append = new ZipOutputStream(new FileOutputStream("append.zip"));

  
        // first, copy contents from existing war

        Enumeration<? extends ZipEntry> entries = war.entries();

        while (entries.hasMoreElements()) {

            ZipEntry e = entries.nextElement();

            System.out.println("copy: " + e.getName());

            append.putNextEntry(e);

            if (!e.isDirectory()) {

                copy(war.getInputStream(e), append);

            }

            append.closeEntry();

        }

  
        // now append some extra content

        ZipEntry e = new ZipEntry("answer.txt");

        System.out.println("append: " + e.getName());

        append.putNextEntry(e);

        append.write("42\n".getBytes());

        append.closeEntry();

  
        // close

        war.close();

        append.close();

    }

}