列出指定的zip文件的内容

//package com.nowjava;


import java.io.IOException;//n o w j a v a . c o m - 时代Java

import java.net.URI;


import java.nio.file.FileSystem;

import java.nio.file.FileSystems;

import java.nio.file.FileVisitResult;

import java.nio.file.Files;

import java.nio.file.Path;

import java.nio.file.Paths;

import java.nio.file.SimpleFileVisitor;

import java.nio.file.StandardCopyOption;

import java.nio.file.attribute.BasicFileAttributes;

import java.text.DateFormat;

import java.text.SimpleDateFormat;

import java.util.Date;

import java.util.HashMap;

import java.util.Map;

/*
 from N o w J a v a . c o m - 时代Java 
*/

public class Main {

    /**

     * List the contents of the specified zip file

     * 

     * @param filename

     * @throws IOException

     * @throws URISyntaxException

     */

    public static void list(String zipFilename) throws IOException {

        System.out.printf("Listing Archive:  %s\n", zipFilename);


        //create the file system

        try (FileSystem zipFileSystem = createZipFileSystem(zipFilename,

                false)) {

            final Path root = zipFileSystem.getPath("/");


            //walk the file tree and print out the directory and filenames

            Files.walkFileTree(root, new SimpleFileVisitor<Path>() {

                @Override

                public FileVisitResult visitFile(Path file,

                        BasicFileAttributes attrs) throws IOException {

                    print(file);

                    return FileVisitResult.CONTINUE;

                }


                @Override

                public FileVisitResult preVisitDirectory(Path dir,

                        BasicFileAttributes attrs) throws IOException {

                    print(dir);

                    return FileVisitResult.CONTINUE;

                }


                /**

                 * prints out details about the specified path such as size and modification time

                 * 

                 * @param file

                 * @throws IOException

                 */

                private void print(Path file) throws IOException {

                    final DateFormat df = new SimpleDateFormat(

                            "MM/dd/yyyy-HH:mm:ss");

                    final String modTime = df.format(new Date(Files

                            .getLastModifiedTime(file).toMillis()));

                    System.out.printf("%d  %s  %s\n", Files.size(file),

                            modTime, file);

                }

            });

        }

    }


    /**

     * Returns a zip file system

     * 

     * @param zipFilename to construct the file system from

     * @param create <code>true</code> if the zip file should be created

     * @return a zip file system

     * @throws IOException

     */

    public static FileSystem createZipFileSystem(String zipFilename,

            boolean create) throws IOException {

        final Path path = Paths.get(zipFilename);

        final URI uri = URI.create("jar:file:" + path.toUri().getPath());

        final Map<String, String> env = new HashMap<>();

        if (create) {

            env.put("create", "true");

        }

        return FileSystems.newFileSystem(uri, env);

    }


    /**

     * Creates/updates a zip file.

     * 

     * @param zipFilename the name of the zip to create

     * @param filenames list of filename to add to the zip

     * @throws IOException

     */

    public static void create(String zipFilename, String... filenames)

            throws IOException {

        try (FileSystem zipFileSystem = createZipFileSystem(zipFilename,

                true)) {

            final Path root = zipFileSystem.getPath("/");


            //iterate over the files we need to add

            for (String filename : filenames) {

                final Path src = Paths.get(filename);


                //add a file to the zip file system

                if (!Files.isDirectory(src)) {

                    final Path dest = zipFileSystem.getPath(

                            root.toString(), src.toString());

                    final Path parent = dest.getParent();

                    if (Files.notExists(parent)) {

                        System.out

                                .printf("Creating directory %s\n", parent);

                        Files.createDirectories(parent);

                    }

                    Files.copy(src, dest,

                            StandardCopyOption.REPLACE_EXISTING);

                } else {

                    //for directories, walk the file tree

                    Files.walkFileTree(src, new SimpleFileVisitor<Path>() {

                        @Override

                        public FileVisitResult visitFile(Path file,

                                BasicFileAttributes attrs)

                                throws IOException {

                            final Path dest = zipFileSystem.getPath(

                                    root.toString(), fi