解压本地zip压缩文件

package com.lapel.activity.html;

import java.io.File;
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.ZipFile;

/**
 *
 * @author ding 解压本地压缩文件
 *
 */
public class UnZipLocal {
	/**
	 *
	 * @param zipFileName
	 *            压缩文件所在  路径+文件名+后缀
	 * @param outputDirectory
	 *            解压之后路径
	 * @throws IOException
	 */
	@SuppressWarnings("unchecked")
	public static void unzip(String zipFileName, String outputDirectory) throws IOException {
		ZipFile zipFile = null;
		try {
			zipFile = new ZipFile(zipFileName);
			Enumeration e = zipFile.entries();
			ZipEntry zipEntry = null;
			File dest = new File(outputDirectory);
			dest.mkdirs();
			while (e.hasMoreElements()) {
				zipEntry = (ZipEntry) e.nextElement();
				String entryName = zipEntry.getName();
				InputStream in = null;
				FileOutputStream out = null;
				try {
					if (zipEntry.isDirectory()) {
						String name = zipEntry.getName();
						name = name.substring(0, name.length() - 1);
						File f = new File(outputDirectory + File.separator + name);
						f.mkdirs();
					} else {
						int index = entryName.lastIndexOf("\\");
						if (index != -1) {
							File df = new File(outputDirectory + File.separator + entryName.substring(0, index));
							df.mkdirs();
						}
						index = entryName.lastIndexOf("/");
						if (index != -1) {
							File df = new File(outputDirectory + File.separator + entryName.substring(0, index));
							df.mkdirs();
						}
						File f = new File(outputDirectory + File.separator + zipEntry.getName());
						// f.createNewFile();
						in = zipFile.getInputStream(zipEntry);
						out = new FileOutputStream(f);
						int c;
						byte[] by = new byte[1024];
						while ((c = in.read(by)) != -1) {
							out.write(by, 0, c);
						}
						out.flush();
					}
				} catch (IOException ex) {
					ex.printStackTrace();
					throw new IOException("解压失败：" + ex.toString());
				} finally {
					if (in != null) {
						try {
							in.close();
						} catch (IOException ex) {
						}
					}
					if (out != null) {
						try {
							out.close();
						} catch (IOException ex) {
						}
					}
				}
			}
		} catch (IOException ex) {
			ex.printStackTrace();
			throw new IOException("解压失败：" + ex.toString());
		} finally {
			if (zipFile != null) {
				try {
					zipFile.close();
				} catch (IOException ex) {
				}
			}
		}
	}

}