java实现解压zip文件

注意:

1:使用jdk自带的zip的util的工具类实现解压zip文件，会出现中文文件名称乱码的问题，apache的zip的工具类改正了这个问题。

2:使用apache的zip的工具类，编码方式和项目的编码方式有关系，若你的项目使用的是utf-8的字符编码，则按照utf-8的方式解压缩，或你的工程的字符编码是gbk的项目编码，则按照字符集为gbk的项目编码来进行解压缩

，对于这个字符编码问题，我在写项目中亲自过.

3:若用apache的zip类库，来实现压缩或是解压缩,则还是出现文件名称乱码问题，这就需要手动设置字符编码啦。

 

程序代码如下：

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.util.Enumeration;

import org.apache.log4j.Logger;
import org.apache.tools.zip.ZipEntry;
import org.apache.tools.zip.ZipFile;
import org.apache.tools.zip.ZipOutputStream;

/**
 * @author Sandy
 * @version $Revision: 1.1 $ 建立日期 2011-7-2
 */
public class ZipFileUtil
{
	private static final Logger		logger	= Logger.getLogger(ZipFileUtil.class);

	private static ZipOutputStream	zipOut;

	private static int				bufSize;

	private static byte[]			buf;

	private static int				readBytes;

	private static final String		_GBK	= "gbk";

	static
	{
		bufSize = 1024;
		buf = new byte[bufSize];
	}

	/**
	 * 压缩文件
	 * 
	 * @param zipDirectory
	 * @param destFileName
	 */
	public static void doZip(String zipDirectory, String destFileName)
	{
		File zipDir = new File(zipDirectory);

		File destFile = new File(destFileName);

		try
		{
			zipOut = new ZipOutputStream(new BufferedOutputStream(new FileOutputStream(destFile)));
			zipOut.setEncoding(_GBK);

			handleDirectory(zipDir, zipOut);
			zipOut.close();
			logger.info("压缩文件成功...........");
		}
		catch (IOException ex)
		{
			logger.error("压缩文件出错:" + ex.getMessage());
		}
	}

	// call by doZip
	private static void handleDirectory(File dir, ZipOutputStream zipOut) throws IOException
	{
		FileInputStream input;

		File[] files = dir.listFiles();

		if (files.length == 0)
		{

			zipOut.putNextEntry(new ZipEntry(dir.toString() + "/"));
			zipOut.closeEntry();
		} else
		{
			for (File sourceFile : files)
			{

				if (sourceFile.isDirectory())
				{
					handleDirectory(sourceFile, zipOut);
				} else
				{
					input = new FileInputStream(sourceFile);

					zipOut.putNextEntry(new ZipEntry(sourceFile.getName()));

					while ((readBytes = input.read(buf)) > 0)
					{
						zipOut.write(buf, 0, readBytes);
					}

					zipOut.closeEntry();
				}
			}
		}
	}

	public static void unZip(String unZipfileName, String targetfolder)
	{
		FileOutputStream output;
		File file;
		InputStream input;
		ZipFile zipFile;

		try
		{
			zipFile = new ZipFile(unZipfileName, _GBK);

			for (Enumeration<?> entries = zipFile.getEntries(); entries.hasMoreElements();)
			{
				ZipEntry entry = (ZipEntry) entries.nextElement();

				file = new File(targetfolder, entry.getName());

				if (entry.isDirectory())
				{
					file.mkdirs();
				} else
				{
					File parent = file.getParentFile();
					if (!parent.exists())
					{
						parent.mkdirs();
					}

					input = zipFile.getInputStream(entry);

					output = new FileOutputStream(file);
					while ((readBytes = input.read(buf)) > 0)
					{
						output.write(buf, 0, readBytes);
					}
					output.close();

					input.close();
				}
			}
			zipFile.close();
			logger.info("解压文件成功...........");
		}
		catch (IOException ex)
		{
			logger.error("解压文件["+unZipfileName+"]出错:" + ex.getMessage());
		}
	}

	public static void main(String[] args) throws Exception
	{
		// ZipFileUtil.doZip("D:\\unzipDir", "D:\\targetZip\\organ.zip");
		ZipFileUtil.unZip("D:\\ziptest\\ziptest.zip", "D:\\unzipDir");

	}

}