Java ZipEntry Add addZipEntry(ZipOutputStream zos, File fileToZip, File baseFolder)

Description

Add a zip entry into the provided ZipOutputStream.

License

Apache License

Declaration

public static void addZipEntry(ZipOutputStream zos, File fileToZip,
        File baseFolder) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import java.io.BufferedInputStream;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;

import java.io.IOException;
import java.io.InputStream;

import java.util.zip.ZipEntry;
import java.util.zip.ZipException;

import java.util.zip.ZipOutputStream;

public class Main {
    /**/*  w  w  w  .  j a va2 s.c  om*/
     * Add a zip entry into the provided <code>ZipOutputStream</code>. The zip
     * entry is the part of <code>filePathToZip</code> truncated with the
     * <code>baseFolderPath</code>.
     * <p>
     * So a file or folder <code>c:\my\base\folder\my\file\to\zip.txt</code>
     * will be added in archive using <code>my/file/to/zip.txt</code> entry.
     */
    public static void addZipEntry(ZipOutputStream zos, File fileToZip,
            File baseFolder) {
        if (!baseFolder.isDirectory()) {
            throw new IllegalArgumentException(baseFolder.getPath()
                    + " is not a directory.");
        }

        if (fileToZip.isDirectory()) {
            final File[] files = fileToZip.listFiles();
            for (final File file : files) {
                addZipEntry(zos, file, baseFolder);
            }
        } else {
            final String filePathToZip;
            final int start;
            try {
                filePathToZip = fileToZip.getCanonicalPath();
                start = baseFolder.getCanonicalPath().length() + 1;
            } catch (final IOException e1) {
                throw new IllegalStateException(e1);
            }

            final int end = filePathToZip.length();
            String entryName = filePathToZip.substring(start, end);
            entryName = entryName.replace(File.separatorChar, '/');
            final FileInputStream inputStream;
            try {
                inputStream = new FileInputStream(filePathToZip);
            } catch (final FileNotFoundException e) {
                throw new IllegalStateException(e);
            }
            addEntryInputStream(zos, entryName, inputStream);
        }
    }

    private static boolean addEntryInputStream(ZipOutputStream zos,
            String entryName, InputStream inputStream) {
        final ZipEntry zipEntry = new ZipEntry(entryName);
        try {
            zos.putNextEntry(zipEntry);
        } catch (final ZipException e) {

            // Ignore duplicate entry - no overwriting
            return false;
        } catch (final IOException e) {
            throw new RuntimeException("Error while adding zip entry "
                    + zipEntry, e);
        }
        final int buffer = 2048;
        final BufferedInputStream bufferedInputStream = new BufferedInputStream(
                inputStream, buffer);
        int count;
        try {
            final byte data[] = new byte[buffer];
            while ((count = bufferedInputStream.read(data, 0, buffer)) != -1) {
                zos.write(data, 0, count);
            }
            bufferedInputStream.close();
            inputStream.close();
            zos.closeEntry();
            return true;
        } catch (final IOException e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * Equivalent to {@link InputStream#read()} but without checked exceptions.
     */
    public static int read(InputStream inputStream) {
        try {
            return inputStream.read();
        } catch (final Exception e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * Equivalent to {@link ZipOutputStream#closeEntry()} but without checked
     * exception.
     */
    public static void closeEntry(ZipOutputStream outputStream) {
        try {
            outputStream.closeEntry();
        } catch (final IOException e) {
            throw new RuntimeException(e);
        }
    }
}

Related

1. addZipEntry(String pathName, byte[] contents, ZipOutputStream zos)
2. addZipEntry(ZipOutputStream zipOut, File file, String prefix)
3. addZipEntry(ZipOutputStream zipOutputStream, File entryFile, String parentPath)
4. addZipEntryFromStream(InputStream is, ZipOutputStream os, String filename)
5. addZipEntryRecursive(ZipOutputStream zipOut, File file, String prefix)