1 /* 2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * - Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 11 * - Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * - Neither the name of Oracle nor the names of its 16 * contributors may be used to endorse or promote products derived 17 * from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS 20 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 21 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 26 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 27 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 28 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 29 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * This source code is provided to illustrate the usage of a given feature 34 * or technique and has been deliberately simplified. Additional steps 35 * required for a production-quality application, such as security checks, 36 * input validation, and proper error handling, might not be present in 37 * this sample code. 38 */ 39 40 import java.io.IOException; 41 import java.io.InputStream; 42 import java.nio.file.FileSystem; 43 import java.nio.file.FileSystems; 44 import java.nio.file.Files; 45 import java.nio.file.Paths; 46 47 /** 48 * Prints data of the specified file to standard output from a zip archive. 49 */ 50 public class ZipCat { 51 52 /** 53 * The main method for the ZipCat program. Run the program with an empty 54 * argument list to see possible arguments. 55 * 56 * @param args the argument list for ZipCat 57 */ main(String[] args)58 public static void main(String[] args) { 59 if (args.length != 2) { 60 System.out.println("Usage: ZipCat zipfile fileToPrint"); 61 } 62 /* 63 * Creates AutoCloseable FileSystem and BufferedReader. 64 * They will be closed automatically after the try block. 65 * If reader initialization fails, then zipFileSystem will be closed 66 * automatically. 67 */ 68 try (FileSystem zipFileSystem 69 = FileSystems.newFileSystem(Paths.get(args[0]),null); 70 InputStream input 71 = Files.newInputStream(zipFileSystem.getPath(args[1]))) { 72 byte[] buffer = new byte[1024]; 73 int len; 74 while ((len = input.read(buffer)) != -1) { 75 System.out.write(buffer, 0, len); 76 } 77 78 } catch (IOException e) { 79 e.printStackTrace(); 80 System.exit(1); 81 } 82 } 83 } 84