第六十三篇：common-compress压缩解压文件

commons-compress是Apache开源组织提供的用于压缩解压的工具包。commons-compress支持常见的压缩格式，今天为大家写一个压缩解压zip文件的例子，关于更多commons-compress的示例可参见：Commons Compress – Commons Compress Examples

在之前，我也写过一篇博客《JAVA文件压缩、解压》，使用了JDK中的API为我们提供的方法，下面我们来使用commons-compress完成文件的压缩与解压。

package com.gujin.compress;import java.io.ByteArrayOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.InputStream;import org.apache.commons.compress.archivers.zip.ZipArchiveEntry;import org.apache.commons.compress.archivers.zip.ZipArchiveInputStream;import org.apache.commons.compress.archivers.zip.ZipArchiveOutputStream;import org.apache.commons.compress.utils.IOUtils;public class ZipTest{   public static void main(String[] args) throws Exception   {      zip();      unZip();   }   public static void zip() throws Exception   {      File zipFile = new File("test.zip");      ZipArchiveOutputStream stream = new ZipArchiveOutputStream(zipFile);      File[] files = new File("src/com/gujin/compress").listFiles();      for (File file : files)      {         InputStream in = new FileInputStream(file);         ZipArchiveEntry entry = new ZipArchiveEntry(file, file.getName());         // 添加一个条目         stream.putArchiveEntry(entry);         IOUtils.copy(in, stream);         // 结束         stream.closeArchiveEntry();         in.close();      }      stream.finish();      stream.close();   }   public static void unZip() throws Exception   {      InputStream stream = new FileInputStream("test.zip");      ZipArchiveInputStream inputStream = new ZipArchiveInputStream(stream);      ZipArchiveEntry entry = null;      while ((entry = inputStream.getNextZipEntry()) != null)      {         System.out.println(entry.getName());         ByteArrayOutputStream outputStream = new ByteArrayOutputStream();         //读取内容         IOUtils.copy(inputStream, outputStream);         System.out.println(outputStream.toString());      }      inputStream.close();      stream.close();   }}
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