Using the ZIP filesystem provider - Java File Path IO

Java examples for File Path IO:Zip File

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Introduction

ZIP filesystem provider handles ZIP and JAR files as though they were filesystems.

You can easily access the contents of the file.

You can manipulate the file as you would do ordinary files, including copying, deleting, moving, and renaming the file.

You can modify certain attributes of the file.

Demo Code

import java.io.IOException;
import java.net.URI;
import java.nio.file.DirectoryStream;
import java.nio.file.FileSystem;
import java.nio.file.FileSystems;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.HashMap;
import java.util.Map;

public class Main {

    public static void main(String[] args) {
        Map<String, String> attributes = new HashMap<>();
        attributes.put("create", "true");
        try {//from  ww  w .j  ava  2s  .  c  o m
            URI zipFile = URI.create("jar:file:/home.zip");
            try (FileSystem zipFileSys = FileSystems.newFileSystem(zipFile, attributes);) {
                Path path = zipFileSys.getPath("docs");
                Files.createDirectory(path);
                try (DirectoryStream<Path> directoryStream =
                                Files.newDirectoryStream(zipFileSys.getPath("/"));) {
                    for (Path file : directoryStream) {
                        System.out.println(file.getFileName());
                    }
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        }

    }
}

OpenOption interface specifies how the file is opened and the StandardOpenOption enumeration implements this interface.

The values of the enumeration are summarized in the following table:

Enumeration Meaning
APPENDBytes are written to the end of the file
CREATE Creates a new file if it does not exist
CREATE_NEW Creates a new file only if the file does not exist
DELETE_ON_CLOSE Deletes the file when it is closed
DSYNCEvery update to a file is written synchronously
READ Open for read access
SPARSE Sparse file
SYNC Every update to the file or metadata is written synchronously
TRUNCATE_EXISTINGTruncates the length of a file to 0 when opening a file
WRITE Opens the file for write access

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