| /* |
| * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| import java.io.IOException; |
| import java.io.OutputStream; |
| import java.nio.file.Files; |
| import java.nio.file.Paths; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.jar.Attributes; |
| import java.util.jar.JarEntry; |
| import java.util.jar.JarOutputStream; |
| import java.util.jar.Manifest; |
| |
| public class JarBuilder { |
| final private String name; |
| final private Attributes attributes = new Attributes(); |
| final private List<Entry> entries = new ArrayList<>(); |
| |
| public JarBuilder(String name) { |
| this.name = name; |
| attributes.putValue("Manifest-Version", "1.0"); |
| attributes.putValue("Created-By", "1.9.0-internal (Oracle Corporation)"); |
| } |
| |
| public JarBuilder addAttribute(String name, String value) { |
| attributes.putValue(name, value); |
| return this; |
| } |
| |
| public JarBuilder addEntry(String name, byte[] bytes) { |
| entries.add(new Entry(name, bytes)); |
| return this; |
| } |
| |
| public void build() throws IOException { |
| try (OutputStream os = Files.newOutputStream(Paths.get(name)); |
| JarOutputStream jos = new JarOutputStream(os)) { |
| JarEntry me = new JarEntry("META-INF/MANIFEST.MF"); |
| jos.putNextEntry(me); |
| Manifest manifest = new Manifest(); |
| manifest.getMainAttributes().putAll(attributes); |
| manifest.write(jos); |
| jos.closeEntry(); |
| entries.forEach(e -> { |
| JarEntry je = new JarEntry(e.name); |
| try { |
| jos.putNextEntry(je); |
| jos.write(e.bytes); |
| jos.closeEntry(); |
| } catch (IOException iox) { |
| throw new RuntimeException(iox); |
| } |
| }); |
| } catch (RuntimeException x) { |
| Throwable t = x.getCause(); |
| if (t instanceof IOException) { |
| IOException iox = (IOException)t; |
| throw iox; |
| } |
| throw x; |
| } |
| } |
| |
| private static class Entry { |
| String name; |
| byte[] bytes; |
| |
| Entry(String name, byte[] bytes) { |
| this.name = name; |
| this.bytes = bytes; |
| } |
| } |
| |
| public static void main(String[] args) throws IOException { |
| JarBuilder jb = new JarBuilder("version.jar"); |
| jb.addAttribute("Multi-Release", "true"); |
| String s = "something to say"; |
| byte[] bytes = s.getBytes(); |
| jb.addEntry("version/Version.class", bytes); |
| jb.addEntry("README", bytes); |
| jb.addEntry("version/Version.java", bytes); |
| jb.build(); |
| } |
| } |