Please could someone help me with this task

Question about the task

Under discussion

The task seems to run as required when using folders on my PC but I just can't seem to get it to verify. Depending on which order I either write the original files to the zip or copy over the new file I seem to get different requirements pass. Thank you.

The main method accepts a list of arguments.
The first argument is the full path to the fileName file.
The second argument is the path to a ZIP file.
Add the fileName file to the archive inside the "new" directory.
If the archive already has a file with the same name in the "new" directory, then replace it.

Example input:
C:/result.mp3 C:/pathToTest/test.zip

Files inside test.zip:
a.txt b.txt

After running Solution.main, the test.zip archive must contain the following:
new/result.mp3
a.txt b.txt

Hint: you need to first save the contents of all of the zip entries somewhere,
and then write all the entities together with the added file to the archive.
Don't use the file system.

Requirements:

In the main method, create a ZipInputStream for the archive (main's second argument). You need to read all of its contents.
In the main method, create a ZipOutputStream for the archive (main's second argument).
You need to write the contents of the file passed to main as the first argument to the ZipOutputStream.
You need to write all of the other content read from the ZipInputStream to the ZipOutputStream.
The archive streams must be closed.

package com.codegym.task.task31.task3105; import java.io.*; import java.nio.file.Files; import java.nio.file.Paths; import java.util.*; import java.util.zip.ZipEntry; import java.util.zip.ZipInputStream; import java.util.zip.ZipOutputStream; /* Adding a file to an archive */ public class Solution { public static void main(String[] args) throws IOException { String filePath = args[0]; String zipPath = args[1]; FileInputStream fis = new FileInputStream(zipPath); ZipInputStream zis = new ZipInputStream(fis); Map<String, byte[]> zipContents = getFiles(zis); fis.close(); zis.close(); /*for (Map.Entry<String, byte[]> pair: zipContents.entrySet()){ System.out.println(pair.getKey() +" : " + Arrays.toString(pair.getValue())); }*/ FileOutputStream fos = new FileOutputStream(zipPath); ZipOutputStream zos = new ZipOutputStream(fos); writeFiles(zipContents, zos); writeFile(filePath, zos); fos.close(); zos.close(); } public static Map<String, byte[]> getFiles(ZipInputStream zis) throws IOException { Map<String, byte[] > zipEntries = new HashMap<>(); ZipEntry zipEntry; while ((zipEntry = zis.getNextEntry()) != null){ byte[] buffer = new byte[1024]; int len; ByteArrayOutputStream bos = new ByteArrayOutputStream(); while((len = zis.read(buffer)) > 0){ bos.write(buffer, 0, len); } zipEntries.put(zipEntry.getName(), bos.toByteArray()); bos.close(); } return zipEntries; } public static void writeFiles(Map<String, byte[]> fileContents, ZipOutputStream zos) throws IOException { for (Map.Entry<String, byte[]> pair: fileContents.entrySet()){ ZipEntry zipEntry = new ZipEntry(pair.getKey()); zos.putNextEntry(zipEntry); zos.write(pair.getValue()); zos.closeEntry(); } } public static void writeFile(String filePath, ZipOutputStream zos) throws IOException { zos.putNextEntry(new ZipEntry("new/" + Paths.get(filePath).getFileName())); Files.copy(Paths.get(filePath), zos); zos.closeEntry(); } }

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AnnemiekFF

Level 41 , Breda, Netherlands

15 May 2020, 07:43

You want both the inputstream and the ouputStream to be with Zippath. USe the other methods you got to write the content.

hidden #10611437

Level 24

17 May 2020, 12:21

Thank you for your comment. I'm not quite understanding what you mean, please could you show me an example. Thanks.

AnnemiekFF

Level 41 , Breda, Netherlands

18 May 2020, 07:43

public static void main(String[] args) throws IOException {
    String fileToBeAdded = args[0];
    String zipArchive = args[1];
    ZipInputStream zippy = new ZipInputStream(new FileInputStream(zipArchive));
    Map<String, byte[]> savedFiles = saveFilesInMap(zippy);
    zippy.close();

    ZipOutputStream zippo = new ZipOutputStream(new FileOutputStream(zipArchive));

    addByteArraysToArchive(savedFiles, zippo, fileToBeAdded);
    addFileToArchive(fileToBeAdded, zippo);
    zippo.close();
}

This is my main. In itself it won't say much, but try and figure out what each of the other methods have to do to get it working. Look into ZipEntry and what you can do with it.