JAVA文件压缩与解压缩功能
package com.osm.personal.common;import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.InputStream;import java.util.ArrayList;import java.util.Enumeration;import java.util.List;import org.apache.tools.zip.ZipEntry;import org.apache.tools.zip.ZipFile;import org.apache.tools.zip.ZipOutputStream;public class ZipUtil {/** * 压缩文件(包括子目录) * * @param baseDir * 要压缩的文件夹(物理路径) * @param fileName * 保存的文件名称(物理文件路径) * @throws Exception */public static void zipFile(String baseDir, String fileName)throws Exception {List<File> fileList = getSubFiles(new File(baseDir));ZipOutputStream zos = new ZipOutputStream(new FileOutputStream(fileName));zos.setEncoding("UTF-8");//设置编码,解决中文乱码的问题ZipEntry ze = null;byte[] buf = new byte[1024];int readLen = 0;for (int i = 0; i < fileList.size(); i++) {File f = (File) fileList.get(i);ze = new ZipEntry(getAbsFileName(baseDir, f));ze.setSize(f.length());ze.setTime(f.lastModified());zos.putNextEntry(ze);InputStream is = new BufferedInputStream(new FileInputStream(f));while ((readLen = is.read(buf, 0, 1024)) != -1) {zos.write(buf, 0, readLen);}is.close();}zos.closeEntry();zos.close();}/** * 给定根目录，返回另一个文件名的相对路径，用于zip文件中的路径. * * @param baseDir * java.lang.String 根目录 * @param realFileName * java.io.File 实际的文件名 * @return 相对文件名 */private static String getAbsFileName(String baseDir, File realFileName) {File real = realFileName;File base = new File(baseDir);String ret = real.getName();while (true) {real = real.getParentFile();if (real == null)break;if (real.equals(base))break;elseret = real.getName() + "/" + ret;}return ret;}/** * 取得指定目录下的所有文件列表，包括子目录. * * @param baseDir * File 指定的目录 * @return 包含java.io.File的List */private static List<File> getSubFiles(File baseDir) {List<File> ret = new ArrayList<File>();File[] tmp = baseDir.listFiles();for (int i = 0; i < tmp.length; i++) {if (tmp[i].isFile()){ret.add(tmp[i]);}if (tmp[i].isDirectory()){ret.addAll(getSubFiles(tmp[i]));}}return ret;}/** * 解压缩功能. 将ZIP_FILENAME文件解压到ZIP_DIR目录下. * @param zipFileName ZIP文件物理路径 * @param zipDir * @throws Exception */@SuppressWarnings("unchecked")public static void unZipFile(String zipFileName, String zipDir)throws Exception {ZipFile zip = new ZipFile(zipFileName);Enumeration<ZipEntry> en = zip.getEntries();ZipEntry entry = null;byte[] buffer = new byte[1024];int length = -1;InputStream input = null;BufferedOutputStream bos = null;File file = null;while (en.hasMoreElements()) {entry = (ZipEntry) en.nextElement();if (entry.isDirectory()) {file = new File(zipDir, entry.getName());if (!file.exists()) {file.mkdir();}continue;}input = zip.getInputStream(entry);file = new File(zipDir, entry.getName());if (!file.getParentFile().exists()) {file.getParentFile().mkdirs();}bos = new BufferedOutputStream(new FileOutputStream(file));while (true) {length = input.read(buffer);if (length == -1){break;}bos.write(buffer, 0, length);}bos.close();input.close();}zip.close();}public static void main(String[] args) {try {// ZipToFile.zipFile("E:\\工作周报", "E:\\工作周报.zip");ZipUtil.unZipFile("E:\\工作周报.zip", "E:\\工作周报2");} catch (Exception e) {e.printStackTrace();}}}?