阅读zip文件中的zip文件

我有zip文件在zip文件中的文件夹内，请建议我如何使用zip输入流阅读它。

例如：

abc.zip | documents/bcd.zip 

如何在zip文件中读取zip文件？

Answer 1

以下代码段列出了另一个ZIP文件中ZIP文件的条目。 根据您的需求进行调整。 ZipFile在引擎盖下使用ZipInputStream 。

代码片段使用Apache Commons IO ，特别是IOUtils.copy 。

 public static void readInnerZipFile(File zipFile, String innerZipFileEntryName) { ZipFile outerZipFile = null; File tempFile = null; FileOutputStream tempOut = null; ZipFile innerZipFile = null; try { outerZipFile = new ZipFile(zipFile); tempFile = File.createTempFile("tempFile", "zip"); tempOut = new FileOutputStream(tempFile); IOUtils.copy( // outerZipFile.getInputStream(new ZipEntry(innerZipFileEntryName)), // tempOut); innerZipFile = new ZipFile(tempFile); Enumeration entries = innerZipFile.entries(); while (entries.hasMoreElements()) { ZipEntry entry = entries.nextElement(); System.out.println(entry); // InputStream entryIn = innerZipFile.getInputStream(entry); } } catch (IOException e) { e.printStackTrace(); } finally { // Make sure to clean up your I/O streams try { if (outerZipFile != null) outerZipFile.close(); } catch (IOException e) { e.printStackTrace(); } IOUtils.closeQuietly(tempOut); if (tempFile != null && !tempFile.delete()) { System.out.println("Could not delete " + tempFile); } try { if (innerZipFile != null) innerZipFile.close(); } catch (IOException e) { e.printStackTrace(); } } } public static void main(String[] args) { readInnerZipFile(new File("abc.zip"), "documents/bcd.zip"); } 

Answer 2

如果你想以递归方式查看zip文件中的zip文件，

  public void lookupSomethingInZip(InputStream fileInputStream) throws IOException { ZipInputStream zipInputStream = new ZipInputStream(fileInputStream); String entryName = ""; ZipEntry entry = zipInputStream.getNextEntry(); while (entry!=null) { entryName = entry.getName(); if (entryName.endsWith("zip")) { //recur if the entry is a zip file lookupSomethingInZip(zipInputStream); } //do other operation with the entries.. entry=zipInputStream.getNextEntry(); } } 

使用从文件派生的文件输入流调用方法 –

 File file = new File(name); lookupSomethingInZip(new FileInputStream(file)); 

Answer 3

我编写了一个代码，可以解压缩zip文件中的所有zip文件。 它甚至可以解压缩到n级压缩。 例如，如果拉链内有拉链文件，拉链内部（等等），它将提取所有这些文件。 使用此类的zipFileExtract方法并将源zip文件和目标目录作为参数传递。

 import java.io.*; import java.nio.file.Files; import java.nio.file.Path; import java.nio.file.Paths; import java.util.*; import java.util.concurrent.ConcurrentLinkedQueue; import java.util.zip.ZipEntry; import java.util.zip.ZipInputStream; public class RecursiveFileExtract { private static final int BUFFER_SIZE = 4096; private static Queue current; private static List visited; public static void zipFileExtract(File sourceZipFile, File destinationDirectory) { Path temp = null; if(!destinationDirectory.exists()) { destinationDirectory.mkdirs(); } try { temp = Files.move(Paths.get(sourceZipFile.getAbsolutePath()), Paths.get(destinationDirectory.getAbsolutePath()+File.separator+sourceZipFile.getName())); } catch (IOException e) { e.printStackTrace(); } File zipFile = new File(temp.toAbsolutePath().toString()); current = new ConcurrentLinkedQueue<>(); visited = new ArrayList<>(); current.add(zipFile); do { unzipCurrent(); zipFinder(destinationDirectory); } while (!current.isEmpty()); } private static void zipFinder(File directory) { try { if (directory != null) { File fileArray[] = directory.listFiles(); if (fileArray != null) { for (File file : fileArray) { if (file != null) { if (file.isDirectory()) { zipFinder(file); } else { if (file.getName().endsWith(".zip")) { if (!visited.contains(file)) { current.add(file); } } } } } } } } catch (Exception e) { System.out.println(e.getLocalizedMessage()); } } private static void unzipCurrent() { try { while (!current.isEmpty()) { File file = current.remove(); visited.add(file); File zipDirectory = new File(file.getParentFile().getAbsolutePath()); unzip(file.getAbsolutePath(), zipDirectory.getAbsolutePath()); } } catch (Exception e) { System.out.println(e.getLocalizedMessage()); } } public static void unzip(String zipFilePath, String destDirectory) { try { ZipInputStream zipIn = new ZipInputStream(new FileInputStream(zipFilePath)); ZipEntry entry = zipIn.getNextEntry(); while (entry != null) { String filePath = destDirectory + File.separator + entry.getName(); if (!entry.isDirectory()) { extractFile(zipIn, filePath); } else { File dir = new File(filePath); Boolean result = dir.mkdir(); } zipIn.closeEntry(); entry = zipIn.getNextEntry(); } zipIn.close(); } catch (Exception e) { e.printStackTrace(); } } private static void extractFile(ZipInputStream zipIn, String filePath) { try { File file = new File(filePath); File parentFile = file.getParentFile(); if (!parentFile.exists()) { Boolean result = parentFile.mkdirs(); if (!result) { throw new Exception(); } } BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(filePath)); byte[] bytesIn = new byte[BUFFER_SIZE]; int read = 0; while ((read = zipIn.read(bytesIn)) != -1) { bos.write(bytesIn, 0, read); } bos.close(); } catch (Exception e) { System.out.println(e.getLocalizedMessage()); } } }