网上有关压缩和解压zip包的博文一大堆，我随便找了一个。看了看，依照自己的须要改动了一下，与各位分享一下，希望各位大神指正：

package com.wangpeng.utill;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

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;

/**

 * @author wangpeng

 */

public class ToolOfZip {

	/**

	 * 解压zip包

	 * @param inputPath 被解压的zip包的路径

	 * @param targetPath 被解压到的文件夹

	 * @param isClear 是否清楚已有文件夹

	 */

	public static void unZip(String inputPath,String targetPath, boolean isClear) {

		try {

			if (null == targetPath || "".equals(targetPath)) {

				targetPath = inputPath.substring(0,inputPath.lastIndexOf("."));

			} 

			ZipFile zipFile = new ZipFile(new File(inputPath));

			Enumeration<? extends ZipEntry> entrys = zipFile.entries();

			while (entrys.hasMoreElements()) {

				ZipEntry entry = entrys.nextElement();

				String name = entry.getName();// aaa\testdir\xxxxx\eee.txt

				String strTargetPath=targetPath+"/"+name;

				String strTargetDir=strTargetPath.substring(0, strTargetPath.lastIndexOf(File.separator));

				if (entry.isDirectory()) {

					File dir = new File(strTargetPath);

					if (!dir.exists()) {

						dir.mkdirs();

					}

				} else {

					File dir = new File(strTargetDir);

					if (!dir.exists()) {

						dir.mkdirs();

					}

					File file = new File(strTargetPath);

					if (file.exists() && isClear) {

						file.delete();

					}

					if (!file.exists()) {

						InputStream in = zipFile.getInputStream(entry);

						ToolOfFile.copyFile(in, file.getAbsolutePath());

					}

				}

			}

		} catch (ZipException ex) {

			ex.printStackTrace();

		} catch (IOException ex) {

			ex.printStackTrace();

		} catch (Exception e) {

			e.printStackTrace();

		}

	}

	/**

	 * 创建ZIP文件

	 *

	 * @param sourcePath

	 *            文件或文件夹路径

	 * @param zipPath

	 *            生成的zip文件存在路径（包含文件名称）

	 */

	public static void createZip(String sourcePath, String zipPath) {

		FileOutputStream fos = null;

		ZipOutputStream zos = null;

		try {

			fos = new FileOutputStream(zipPath);

			zos = new ZipOutputStream(fos);

			writeZip(new File(sourcePath), "", zos);

		} catch (FileNotFoundException e) {

			e.printStackTrace();

		} finally {

			try {

				if (zos != null) {

					zos.close();

				}

			} catch (IOException e) {

				e.printStackTrace();

			}

		}

	}

	private static void writeZip(File inFile, String parentPath,

			ZipOutputStream zipOutStream) {

		if (inFile.exists()) {

			if (inFile.isDirectory()) {

				parentPath += inFile.getName() + File.separator;

				File[] files = inFile.listFiles();

				for (File file : files) {

					writeZip(file, parentPath, zipOutStream);

				}

			} else {

				FileInputStream fileInStream = null;

				try {

					fileInStream = new FileInputStream(inFile);

					ZipEntry entry = new ZipEntry(parentPath + inFile.getName());

					zipOutStream.putNextEntry(entry);

					byte[] buff = new byte[1024];

					int len;

					while ((len = fileInStream.read(buff)) != -1) {

						zipOutStream.write(buff, 0, len);

						zipOutStream.flush();

					}

				} catch (FileNotFoundException e) {

					e.printStackTrace();

				} catch (IOException e) {

					e.printStackTrace();

				} finally {

					try {

						if (fileInStream != null) {

							fileInStream.close();

						}

					} catch (IOException e) {

						e.printStackTrace();

					}

				}

			}

		}

	}

	public static void main(String[] args) {

		String oldPath = "F:/test/ddd/";

		String newPath = "F:/test/ccc.zip";

		// ToolOfZip.createZip(oldPath, newPath);

		//ToolOfZip.unZip(newPath, null, false);

		System.out.println();

		System.out.println("---------ok----------");

	}

}