java zip工具类

package com.dmx.recmanager.action;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Enumeration;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.tools.zip.ZipEntry;
import org.apache.tools.zip.ZipFile;
import org.apache.tools.zip.ZipOutputStream;


public class ZipUtils {
	static final int BUFFER = 1024;
	
	public static void main(String[] args) {
		try {
			unZip("E:\\epg.zip", "E:\\epg_Temp\\");
			//readEpgFile("D:\\epg");
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

	public static void zip(String sourceDir, String zipFile) {
		OutputStream os;
		try {
			os = new FileOutputStream(zipFile);
			BufferedOutputStream bos = new BufferedOutputStream(os);
			ZipOutputStream zos = new ZipOutputStream(bos);
			
			File file = new File(sourceDir);
			
			String basePath = null;
			if (file.isDirectory()) {
				basePath = file.getPath();
			} else {
				basePath = file.getParent();
			}
			
			zipFile(file, basePath, zos);
			
			zos.closeEntry();
			zos.close();
		} catch (Exception e) {
			e.printStackTrace();
		}
	
	}
	
	/**
	* @param source
	* @param basePath
	* @param zos
	* @throws IOException
	*/
	private static void zipFile(File source, String basePath,
		ZipOutputStream zos) {
		File[] files = new File[0];
	
		if (source.isDirectory()) {
			files = source.listFiles();
		} else {
			files = new File[1];
			files[0] = source;
		}
	
		String pathName;
		byte[] buf = new byte[1024];
		int length = 0;
		try {
			for (File file : files) {
				if (file.isDirectory()) {
					pathName = file.getPath().substring(basePath.length() + 1)+ "/";
					zos.putNextEntry(new ZipEntry(pathName));
					zipFile(file, basePath, zos);
				} else {
					pathName = file.getPath().substring(basePath.length() + 1);
					InputStream is = new FileInputStream(file);
					BufferedInputStream bis = new BufferedInputStream(is);
					zos.putNextEntry(new ZipEntry(pathName));
					while ((length = bis.read(buf)) > 0) {
						zos.write(buf, 0, length);
					}
					is.close();
				}
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
	
	}

	/**
	* 解压缩zip文件 
	* @param fileName 要解压的文件名 包含路径 如："c:\\test.zip"
	* @param filePath 解压后存放文件的路径 如："c:\\temp"
	* @throws Exception
	*/
	public static void unZip(String fileName, String filePath) throws Exception{
	   ZipFile zipFile = new ZipFile(fileName,"GBK"); 
	   Enumeration emu = zipFile.getEntries();
	  
	   while(emu.hasMoreElements()){
		   	ZipEntry entry = (ZipEntry) emu.nextElement();
		    if (entry.isDirectory()){
		    	new File(filePath+entry.getName()).mkdirs();
		    	continue;
		    }
		    BufferedInputStream bis = new BufferedInputStream(zipFile.getInputStream(entry));
		   
		    File file = new File(filePath + entry.getName());
		    File parent = file.getParentFile();
		    if(parent != null && (!parent.exists())){
		    	parent.mkdirs();
		    }
		    FileOutputStream fos = new FileOutputStream(file);
		    BufferedOutputStream bos = new BufferedOutputStream(fos,BUFFER);
	
		    byte [] buf = new byte[BUFFER];
		    int len = 0;
		    while((len=bis.read(buf,0,BUFFER))!=-1){
		    	fos.write(buf,0,len);
		    }
		    bos.flush();
		    bos.close();
		    bis.close();
		   }
		   zipFile.close();
	}
	/**
	 * batch read EpgFile
	 * @param fileUrl
	 */
	public static File[] readEpgFile(String fileUrl){
	
		File epgfile = new File(fileUrl);
		File[] fileArry = epgfile.listFiles();
		return fileArry;
	}
}