文件解压缩工具类ZipUtil

package com.imooc.test;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Enumeration;
import java.util.zip.ZipEntry;
import java.util.zip.ZipException;
import java.util.zip.ZipFile;
import java.util.zip.ZipOutputStream;


/**
 * 
 * @version 1.0
 * @since 2015-9-14
 * 文件解压缩工具类
 *
 */
public final class ZipUtil
{

	/**
	 * 缓冲大小
	 */
	private static int BUFFERSIZE = 2 << 10;
	
	/**
	 * 压缩
	 * @param paths
	 * @param fileName
	 */
	public static void zip(String[] paths, String fileName)
	{
		
		ZipOutputStream zos = null;
		try
		{
			zos = new ZipOutputStream(new FileOutputStream(fileName));
			for(String filePath : paths)
			{
				//递归压缩文件
				File file = new File(filePath);
				String relativePath = file.getName();
				if(file.isDirectory())
				{
					relativePath += File.separator;
				}
				zipFile(file, relativePath, zos);
			}
		}
		catch (IOException e)
		{
			e.printStackTrace();
		}
		finally
		{
			try
			{
				if(zos != null)
				{
					zos.close();
				}
			}
			catch (IOException e)
			{
				e.printStackTrace();
			}
		}
	}
	
	public static void zipFile(File file, String relativePath, ZipOutputStream zos)
	{
		InputStream is = null;
		try
		{
			if(!file.isDirectory())
			{
				ZipEntry zp = new ZipEntry(relativePath);
				zos.putNextEntry(zp);
				is = new FileInputStream(file);
				byte[] buffer = new byte[BUFFERSIZE];
				int length = 0;
				while ((length = is.read(buffer)) >= 0)
				{
					zos.write(buffer, 0, length);
				}
				zos.flush();
				zos.closeEntry();
			}
			else
			{
		        for(File f: file.listFiles())
				{
	        		zipFile(f, relativePath + f.getName() + File.separator, zos);
				}
			}
		}
		catch (IOException e)
		{
			e.printStackTrace();
		}
		finally
		{
			try
			{
				if(is != null)
				{
					is.close();
				}
			}
			catch (IOException e)
			{
				e.printStackTrace();
			}
		}
	}
	
	/**
	 * 解压缩
	 * @param fileName
	 * @param path
	 */
	public static void unzip(String fileName, String path)
	{
		FileOutputStream fos = null;
		InputStream is = null;
		try
		{
			ZipFile zf = new ZipFile(new File(fileName));
			Enumeration en = zf.entries();
			while (en.hasMoreElements())
			{
				ZipEntry zn = (ZipEntry) en.nextElement();
				if (!zn.isDirectory())
				{
					is = zf.getInputStream(zn);
					File f = new File(path + zn.getName());
					File file = f.getParentFile();
					file.mkdirs();
					fos = new FileOutputStream(path + zn.getName());
					int len = 0;
					byte bufer[] = new byte[BUFFERSIZE];
					while (-1 != (len = is.read(bufer)))
					{
						fos.write(bufer, 0, len);
					}
					fos.close();
				}
			}
		}
		catch (ZipException e)
		{
			e.printStackTrace();
		}
		catch (IOException e)
		{
			e.printStackTrace();
		}
		finally
		{
			try
			{
				if(null != is)
				{
					is.close();
				}
				if(null != fos)
				{
					fos.close();
				}
			}
			catch (IOException e)
			{
				e.printStackTrace();
			}
		}
	}
	
	/**
	 * @param args
	 */
	public static void main(String[] args)
	{
		zip(new String[] {"D:/tmp/20150418/logs/file/2015-08-28/debug-log.log","D:/tmp/20150418/logs/file/2015-08-28/error-log.log"}, "D:/tmp/20150418/logs/file/2015-08-28/test.zip");
		unzip("D:/tmp/20150418/logs/file/2015-08-28/test.zip", "D:/test/");
	}
}