本文实例讲述了Java实现的zip压缩及解压缩工具类。分享给大家供大家参考，具体如下：
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import java.io.BufferedInputStream;import java.io.BufferedOutputStream;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 org.apache.tools.zip.ZipEntry;import org.apache.tools.zip.ZipFile;import org.apache.tools.zip.ZipOutputStream;public class ZipUtil { private static final int BUFFEREDSIZE = 1024; /** * 压缩文件 * * @param zipFileName * 保存的压缩包文件路径 * @param filePath * 需要压缩的文件夹或者文件路径 * @param isDelete * 是否删除源文件 * @throws Exception */ public void zip(String zipFileName, String filePath, boolean isDelete) throws Exception { zip(zipFileName, new File(filePath), isDelete); } /** * 压缩文件 * * @param zipFileName * 保存的压缩包文件路径 * @param inputFile * 需要压缩的文件夹或者文件 * @param isDelete * 是否删除源文件 * @throws Exception */ public void zip(String zipFileName, File inputFile, boolean isDelete) throws Exception { ZipOutputStream out = new ZipOutputStream(new FileOutputStream(zipFileName)); if (!inputFile.exists()) { throw new FileNotFoundException("在指定路径未找到需要压缩的文件！"); } zip(out, inputFile, "", isDelete); out.close(); } /** * 递归压缩方法 * * @param out * 压缩包输出流 * @param f * 需要压缩的文件 * @param base * 压缩的路径 * @param isDelete * 是否删除源文件 * @throws Exception */ private void zip(ZipOutputStream out, File inputFile, String base, boolean isDelete) throws Exception { if (inputFile.isDirectory()) { // 如果是目录 File[] inputFiles = inputFile.listFiles(); out.putNextEntry(new ZipEntry(base + "/")); base = base.length() == 0 ? "" : base + "/"; for (int i = 0; i < inputFiles.length; i++) { zip(out, inputFiles[i], base + inputFiles[i].getName(), isDelete); } } else { // 如果是文件 if (base.length() > 0) { out.putNextEntry(new ZipEntry(base)); } else { out.putNextEntry(new ZipEntry(inputFile.getName())); } FileInputStream in = new FileInputStream(inputFile); try { int len; byte[] buff = new byte[BUFFEREDSIZE]; while ((len = in.read(buff)) != -1) { out.write(buff, 0, len); } } catch (IOException e) { throw e; } finally { in.close(); } } if (isDelete) { inputFile.delete(); } } /** * 解压缩 * * @param zipFilePath * 压缩包路径 * @param fileSavePath * 解压路径 * @param isDelete * 是否删除源文件 * @throws Exception */ public void unZip(String zipFilePath, String fileSavePath, boolean isDelete) throws Exception { try { (new File(fileSavePath)).mkdirs(); File f = new File(zipFilePath); if ((!f.exists()) && (f.length() <= 0)) { throw new Exception("要解压的文件不存在!"); } ZipFile zipFile = new ZipFile(f); String strPath, gbkPath, strtemp; File tempFile = new File(fileSavePath);// 从当前目录开始 strPath = tempFile.getAbsolutePath();// 输出的绝对位置 Enumeration<ZipEntry> e = zipFile.getEntries(); while (e.hasMoreElements()) { org.apache.tools.zip.ZipEntry zipEnt = e.nextElement(); gbkPath = zipEnt.getName(); if (zipEnt.isDirectory()) { strtemp = strPath + File.separator + gbkPath; File dir = new File(strtemp); dir.mkdirs(); continue; } else { // 读写文件 InputStream is = zipFile.getInputStream(zipEnt); BufferedInputStream bis = new BufferedInputStream(is); gbkPath = zipEnt.getName(); strtemp = strPath + File.separator + gbkPath; // 建目录 String strsubdir = gbkPath; for (int i = 0; i < strsubdir.length(); i++) { if (strsubdir.substring(i, i + 1).equalsIgnoreCase("/")) { String temp = strPath + File.separator + strsubdir.substring(0, i); File subdir = new File(temp); if (!subdir.exists()) subdir.mkdir(); } } FileOutputStream fos = new FileOutputStream(strtemp); BufferedOutputStream bos = new BufferedOutputStream(fos); int len; byte[] buff = new byte[BUFFEREDSIZE]; while ((len = bis.read(buff)) != -1) { bos.write(buff, 0, len); } bos.close(); fos.close(); } } } catch (Exception e) { e.printStackTrace(); throw e; } if (isDelete) { new File(zipFilePath).delete(); } }// public static void main(String[] args) {// ZipUtil cpr = new ZipUtil();// try {// cpr.zip("C:/Users/Lenovo User/Desktop/test中文.zip", "C:/Users/Lenovo User/Desktop/新建文件夹", false);// cpr.unZip("C:/Users/Lenovo User/Desktop/test中文.zip", "C:/Users/Lenovo User/Desktop/新建文件夹2", false);// } catch (Exception e) {// e.printStackTrace();// }//// }} |
希望本文所述对大家java程序设计有所帮助。
原文链接：http://blog.csdn.net/soundfly/article/details/16861881
