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
      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----------");	}}