学步园

package com.scout.util;</p> <p>import java.io.BufferedInputStream;<br /> import java.io.File;<br /> import java.io.FileInputStream;<br /> import java.io.FileOutputStream;<br /> import java.io.InputStream;<br /> import java.util.Enumeration;</p> <p>import org.apache.tools.zip.ZipEntry;<br /> import org.apache.tools.zip.ZipFile;<br /> import org.apache.tools.zip.ZipOutputStream;</p> <p>public class ZipUtil {</p> <p>/**<br /> * 功能：压缩成zip<br /> * @author 吴晓聪 添加于 2008-5-19<br /> * @param zipFilep 压缩后的zip文件名<br /> * @param path 压缩路径<br /> * @throws java.lang.Exception<br /> */<br /> public static void zip(String zipFilep, String path) throws Exception {<br /> System.out.println("压缩文件开始.....................");<br /> File zipFile = new File(zipFilep);<br /> if (!zipFile.exists()) {<br /> zipFile.createNewFile();<br /> }<br /> ZipOutputStream out = new ZipOutputStream(new FileOutputStream(zipFile));<br /> write(out, path, "");<br /> out.close();<br /> System.out.println("压缩文件结束！");<br /> }</p> <p>/**<br /> * 功能：写压缩流<br /> * @author 吴晓聪 添加于 2008-5-19<br /> * @param out 压缩输出流<br /> * @param path 压缩路径<br /> * @param base 压缩式的基础目录<br /> * @throws java.lang.Exception<br /> */</p> <p>private static void write(ZipOutputStream out, String path, String base)<br /> throws Exception {<br /> File file = new File(path);<br /> if (file.isDirectory()) {//文件夹，递归<br /> base = base.length() == 0 ? "" : base + File.separator;<br /> File[] tempFiles = file.listFiles();<br /> for (int i = 0; i < tempFiles.length; i++) {<br /> write(out, tempFiles[i].getPath(), base+tempFiles[i].getName());<br /> }<br /> } else {//文件，压缩<br /> byte[] buff = new byte[2048];<br /> int bytesRead = -1;<br /> ZipEntry entry = new ZipEntry(base);<br /> out.putNextEntry(entry);<br /> InputStream in = new BufferedInputStream(new FileInputStream(file));<br /> while (-1 != (bytesRead = in.read(buff, 0, buff.length))) {<br /> out.write(buff, 0, bytesRead);<br /> }<br /> in.close();<br /> out.flush();<br /> }<br /> }</p> <p> /**<br /> * 功能：解压缩<br /> * @author 吴晓聪 添加于 2008-5-19<br /> * @param zipFilename zip文件<br /> * @param destPath 解压缩路径<br /> * @throws java.lang.Exception<br /> */<br /> public static void unZip(String zipFilename, String destPath) throws Exception {<br /> System.out.println("解压文件开始.....................");<br /> ZipFile zip = new ZipFile(zipFilename, "GB2312");<br /> Enumeration enu = zip.getEntries();//得到压缩文件夹中的所有文件<br /> while (enu.hasMoreElements()) {<br /> ZipEntry entry = (ZipEntry) enu.nextElement();<br /> String file = destPath + entry.getName();<br /> write(zip, entry, file);<br /> }<br /> System.out.println("解压文件结束！");<br /> }</p> <p>/**<br /> * 功能：将解压缩之后的文件写入目录<br /> * @author 吴晓聪 添加于 2008-5-19<br /> * @param zip 压缩文件<br /> * @param entry 压缩文件实体——压缩文件中的文件<br /> * @param fileLocation 解压缩之后的文件路径<br /> * @throws Exception<br /> */<br /> private static void write(ZipFile zip, ZipEntry entry, String file) throws Exception {<br /> if (entry.isDirectory()) {<br /> File f = new File(file);<br /> f.mkdirs();<br /> } else {<br /> File f = new File(file);<br /> createDir(f);<br /> FileOutputStream fos = new FileOutputStream(f);<br /> byte[] buffer = new byte[8196];<br /> InputStream is = zip.getInputStream(entry);<br /> for (int len = is.read(buffer, 0, buffer.length); len != -1; len = is.read(buffer, 0, 8196)) {<br /> fos.write(buffer, 0, len);<br /> }<br /> fos.close();<br /> }<br /> }</p> <p>/**<br /> * 功能：创建目录<br /> * @author 吴晓聪 添加于 2008-5-19<br /> * @param file 文件或目录<br /> */<br /> private static void createDir(File file){<br /> if(file.isDirectory() && !file.exists()){<br /> file.mkdirs();<br /> }else{<br /> String path = file.getPath();<br /> int i = path.lastIndexOf(File.separator);<br /> path = path.substring(0,i);<br /> new File(path).mkdirs();<br /> }<br /> }</p> <p>/**<br /> * 功能：测试样例<br /> * @author 吴晓聪 添加于 2008-5-19<br /> * @param args<br /> */<br /> public static void main(String[] args) {<br /> try {<br /> zip("f://cong.zip", "F://资料");<br /> unZip("f://cong.zip", "f://cong//");<br /> } catch (Exception e) {<br /> e.printStackTrace();<br /> }<br /> }<br /> }<br />

此源文件直接可以使用，关键点如下：
1 要解决中文乱码问题，需用ant下的tool工具包，只要将ant.jar放到类路径下即可。
2 解压缩时，得到的压缩实体为文件，创建文件时，需要先创建文件夹。

ant.jar包下载地址：

http://jar.cn13e.com/details.action?id=43&keywords=ant