Java tutorial
/* * Copyright [2015] [wisemapping] * * Licensed under WiseMapping Public License, Version 1.0 (the "License"). * It is basically the Apache License, Version 2.0 (the "License") plus the * "powered by wisemapping" text requirement on every single page; * you may not use this file except in compliance with the License. * You may obtain a copy of the license at * * http://www.wisemapping.org/license * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.wisemapping.util; import org.apache.commons.io.IOUtils; import org.jetbrains.annotations.NotNull; import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.util.zip.ZipEntry; import java.util.zip.ZipInputStream; import java.util.zip.ZipOutputStream; public class ZipUtils { public static byte[] zipToBytes(byte[] zip) throws IOException { byte[] result = null; if (zip != null) { final ByteArrayInputStream in = new ByteArrayInputStream(zip); final ZipInputStream zipIn = new ZipInputStream(in); zipIn.getNextEntry(); result = IOUtils.toByteArray(zipIn); zipIn.closeEntry(); zipIn.close(); } return result; } public static byte[] bytesToZip(@NotNull final byte[] content) throws IOException { ZipOutputStream zip = null; final ByteArrayOutputStream byteArray = new ByteArrayOutputStream(); try { zip = new ZipOutputStream(byteArray); ZipEntry zEntry = new ZipEntry("content"); zip.putNextEntry(zEntry); IOUtils.write(content, zip); zip.closeEntry(); } finally { if (zip != null) { zip.flush(); zip.close(); } } return byteArray.toByteArray(); } }