J2EE常用工具类—文件打包解包处理类
package cn.org.jshuwei.j2ee.util;import java.io.File;import java.io.FileInputStream;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;/*** 文件压缩解压工具类* * @author huwei(jshuwei.org.cn)* @since 1.2* */public class ZipUtil { /** * 压缩ZIP文件，将baseDirName目录下的所有文件压缩到targetFileName.ZIP文件中 * * @param baseDirName * 需要压缩的文件的跟目录 * @param targetFileName * 压缩有生成的文件名 */ public static void zipFile(String baseDirName, String targetFileName) { if (baseDirName == null) { return; } File file = new File(baseDirName); if (!file.exists()) { return; } String baseDirPath = file.getAbsolutePath(); File targetFile = new File(targetFileName); try { ZipOutputStream out = new ZipOutputStream(new FileOutputStream( targetFile)); if (file.isFile()) { fileToZip(baseDirPath, file, out); } else { dirToZip(baseDirPath, file, out); } out.close(); } catch (IOException e) { e.printStackTrace(); } } /** * 解压缩ZIP文件，将ZIP文件里的内容解压到targetBaseDirName目录下 * * @param zipFileName * 待解压缩的ZIP文件名 * @param targetBaseDirName * 目标目录 */ @SuppressWarnings("unchecked") public static void unzipFile(String zipFileName, String targetBaseDirName) { if (!targetBaseDirName.endsWith(File.separator)) { targetBaseDirName += File.separator; } try { ZipFile zipFile = new ZipFile(zipFileName); ZipEntry entry = null; String entryName = null; String targetFileName = null; byte[] buffer = new byte; int bytes_read; Enumeration entrys = zipFile.getEntries();//.entries(); while (entrys.hasMoreElements()) { entry = (ZipEntry) entrys.nextElement(); entryName = entry.getName(); targetFileName = targetBaseDirName + entryName; if (entry.isDirectory()) { new File(targetFileName).mkdirs(); continue; } else { new File(targetFileName).getParentFile().mkdirs(); } File targetFile = new File(targetFileName); FileOutputStream os = new FileOutputStream(targetFile); InputStream is = zipFile.getInputStream(entry); while ((bytes_read = is.read(buffer)) != -1) { os.write(buffer, 0, bytes_read); } os.close(); is.close(); } } catch (IOException e) { e.printStackTrace(); } } private static void dirToZip(String baseDirPath, File dir, ZipOutputStream out) { if (dir.isDirectory()) { File[] files = dir.listFiles(); if (files.length == 0) { ZipEntry entry = new ZipEntry(getEntryName(baseDirPath, dir)); try { out.putNextEntry(entry); out.closeEntry(); } catch (IOException e) { e.printStackTrace(); } return; } for (int i = 0; i < files.length; i++) { if (files.isFile()) { fileToZip(baseDirPath, files, out); } else { dirToZip(baseDirPath, files, out); } } } } private static void fileToZip(String baseDirPath, File file, ZipOutputStream out) { FileInputStream in = null; ZipEntry entry = null; byte[] buffer = new byte; int bytes_read; if (file.isFile()) { try { in = new FileInputStream(file); entry = new ZipEntry(getEntryName(baseDirPath, file)); out.putNextEntry(entry); while ((bytes_read = in.read(buffer)) != -1) { out.write(buffer, 0, bytes_read); } out.closeEntry(); in.close(); } catch (IOException e) { e.printStackTrace(); } } } private static String getEntryName(String baseDirPath, File file) { if (!baseDirPath.endsWith(File.separator)) { baseDirPath += File.separator; } String filePath = file.getAbsolutePath(); if (file.isDirectory()) { filePath += "/"; } int index = filePath.indexOf(baseDirPath); return filePath.substring(index + baseDirPath.length()); }}
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