java解压zip文件

package com.chuangqi.tools; import org.apache.tools.zip.ZipEntry; import org.apache.tools.zip.ZipFile; import java.io.*; import java.util.Enumeration; public class FileUnZipUtils { /** * 解压zip文件 * @author xiyue * @param sourceFile,待解压的zip文件; * toFolder,解压后的存放路径 * @throws Exception **/ public static void zipToFile(String sourceFile, String toFolder) throws Exception { String toDisk = toFolder;// 接收解压后的存放路径 ZipFile zfile = new ZipFile(sourceFile, "gbk");// 连接待解压文件 "utf-8"会乱码 Enumeration zList = zfile.getEntries();// 得到zip包里的所有元素 ZipEntry ze = null; byte[] buf = new byte[1024]; while (zList.hasMoreElements()) { ze = (ZipEntry) zList.nextElement(); if (ze.isDirectory()) { // log.info("打开zip文件里的文件夹:"+ ze.getName() +"skipped..."); File f = new File(toDisk+"/" + ze.getName()); f.mkdirs(); continue; } OutputStream outputStream = null; InputStream inputStream = null; try { // 以ZipEntry为参数得到一个InputStream，并写到OutputStream中 outputStream = new BufferedOutputStream(new FileOutputStream(getRealFileName(toDisk, ze.getName()))); inputStream = new BufferedInputStream(zfile.getInputStream(ze)); int readLen = 0; while ((readLen = inputStream.read(buf, 0, 1024)) != -1) { outputStream.write(buf, 0, readLen); } inputStream.close(); outputStream.close(); } catch (Exception e) { // log.info("解压失败："+e.toString()); throw new IOException("解压失败：" + e.toString()); } finally { if (inputStream != null) { try { inputStream.close(); } catch (IOException ex) { } } if (outputStream != null) { try { outputStream.close(); } catch (IOException ex) { ex.printStackTrace(); } } inputStream = null; outputStream = null; } } zfile.close(); } /** * * 给定根目录，返回一个相对路径所对应的实际文件名. * * @param zippath * 指定根目录 * * @param absFileName * 相对路径名，来自于ZipEntry中的name * * @return java.io.File 实际的文件 * */ private static File getRealFileName(String zippath, String absFileName) { // log.info("文件名："+absFileName); String[] dirs = absFileName.split("/", absFileName.length()); File ret = new File(zippath);// 创建文件对象 if (dirs.length > 1) { for (int i = 0; i < dirs.length - 1; i++) { ret = new File(ret, dirs[i]); } } if (!ret.exists()) {// 检测文件是否存在 ret.mkdirs();// 创建此抽象路径名指定的目录 } ret = new File(ret, dirs[dirs.length - 1]);// 根据 ret 抽象路径名和 child // 路径名字符串创建一个新 File 实例 return ret; } }