Android实现zip文件压缩及解压缩的方法

本文实例讲述了Android实现zip文件压缩及解压缩的方法。分享给大家供大家参考。具体如下：

DirTraversal.java如下：

package com.once;import java.io.File;import java.util.ArrayList;import java.util.LinkedList;/** * 文件夹遍历 * @author once * */public class DirTraversal {  //no recursion  public static LinkedList listLinkedFiles(String strPath) {    LinkedList list = new LinkedList();    File dir = new File(strPath);    File file[] = dir.listFiles();    for (int i = 0; i < file.length; i++) {      if (file[i].isDirectory())        list.add(file[i]);      else        System.out.println(file[i].getAbsolutePath());    }    File tmp;    while (!list.isEmpty()) {      tmp = (File) list.removeFirst();      if (tmp.isDirectory()) {        file = tmp.listFiles();        if (file == null)          continue;        for (int i = 0; i < file.length; i++) {          if (file[i].isDirectory())            list.add(file[i]);          else            System.out.println(file[i].getAbsolutePath());        }      } else {        System.out.println(tmp.getAbsolutePath());      }    }    return list;  }  //recursion  public static ArrayList listFiles(String strPath) {    return refreshFileList(strPath);  }  public static ArrayList refreshFileList(String strPath) {    ArrayList filelist = new ArrayList();    File dir = new File(strPath);    File[] files = dir.listFiles();    if (files == null)      return null;    for (int i = 0; i < files.length; i++) {      if (files[i].isDirectory()) {        refreshFileList(files[i].getAbsolutePath());      } else {        if(files[i].getName().toLowerCase().endsWith("zip"))          filelist.add(files[i]);      }    }    return filelist;  }}

ZipUtils.java如下：

package com.once;import java.io.*;import java.util.ArrayList;import java.util.Collection;import java.util.Enumeration;import java.util.zip.ZipEntry;import java.util.zip.ZipException;import java.util.zip.ZipFile;import java.util.zip.ZipOutputStream;/** * Java utils 实现的Zip工具 * * @author once */public class ZipUtils {  private static final int BUFF_SIZE = 1024 * 1024; // 1M Byte  /**   * 批量压缩文件（夹）   *   * @param resFileList 要压缩的文件（夹）列表   * @param zipFile 生成的压缩文件   * @throws IOException 当压缩过程出错时抛出   */  public static void zipFiles(Collection resFileList, File zipFile) throws IOException {    ZipOutputStream zipout = new ZipOutputStream(new BufferedOutputStream(new FileOutputStream(        zipFile), BUFF_SIZE));    for (File resFile : resFileList) {      zipFile(resFile, zipout, "");    }    zipout.close();  }  /**   * 批量压缩文件（夹）   *   * @param resFileList 要压缩的文件（夹）列表   * @param zipFile 生成的压缩文件   * @param comment 压缩文件的注释   * @throws IOException 当压缩过程出错时抛出   */  public static void zipFiles(Collection resFileList, File zipFile, String comment)      throws IOException {    ZipOutputStream zipout = new ZipOutputStream(new BufferedOutputStream(new FileOutputStream(        zipFile), BUFF_SIZE));    for (File resFile : resFileList) {      zipFile(resFile, zipout, "");    }    zipout.setComment(comment);    zipout.close();  }  /**   * 解压缩一个文件   *   * @param zipFile 压缩文件   * @param folderPath 解压缩的目标目录   * @throws IOException 当解压缩过程出错时抛出   */  public static void upZipFile(File zipFile, String folderPath) throws ZipException, IOException {    File desDir = new File(folderPath);    if (!desDir.exists()) {      desDir.mkdirs();    }    ZipFile zf = new ZipFile(zipFile);    for (Enumeration<?> entries = zf.entries(); entries.hasMoreElements();) {      ZipEntry entry = ((ZipEntry)entries.nextElement());      InputStream in = zf.getInputStream(entry);      String str = folderPath + File.separator + entry.getName();      str = new String(str.getBytes("8859_1"), "GB2312");      File desFile = new File(str);      if (!desFile.exists()) {        File fileParentDir = desFile.getParentFile();        if (!fileParentDir.exists()) {          fileParentDir.mkdirs();        }        desFile.createNewFile();      }      OutputStream out = new FileOutputStream(desFile);      byte buffer[] = new byte[BUFF_SIZE];      int realLength;      while ((realLength = in.read(buffer)) > 0) {        out.write(buffer, 0, realLength);      }      in.close();      out.close();    }  }  /**   * 解压文件名包含传入文字的文件   *   * @param zipFile 压缩文件   * @param folderPath 目标文件夹   * @param nameContains 传入的文件匹配名   * @throws ZipException 压缩格式有误时抛出   * @throws IOException IO错误时抛出   */  public static ArrayList upZipSelectedFile(File zipFile, String folderPath,      String nameContains) throws ZipException, IOException {    ArrayList fileList = new ArrayList();     File desDir = new File(folderPath);    if (!desDir.exists()) {      desDir.mkdir();    }    ZipFile zf = new ZipFile(zipFile);    for (Enumeration<?> entries = zf.entries(); entries.hasMoreElements();) {      ZipEntry entry = ((ZipEntry)entries.nextElement());      if (entry.getName().contains(nameContains)) {        InputStream in = zf.getInputStream(entry);        String str = folderPath + File.separator + entry.getName();        str = new String(str.getBytes("8859_1"), "GB2312");        // str.getBytes("GB2312"),"8859_1" 输出        // str.getBytes("8859_1"),"GB2312" 输入        File desFile = new File(str);        if (!desFile.exists()) {          File fileParentDir = desFile.getParentFile();          if (!fileParentDir.exists()) {            fileParentDir.mkdirs();          }          desFile.createNewFile();        }        OutputStream out = new FileOutputStream(desFile);        byte buffer[] = new byte[BUFF_SIZE];        int realLength;        while ((realLength = in.read(buffer)) > 0) {          out.write(buffer, 0, realLength);        }        in.close();        out.close();        fileList.add(desFile);      }    }    return fileList;  }  /**   * 获得压缩文件内文件列表   *   * @param zipFile 压缩文件   * @return 压缩文件内文件名称   * @throws ZipException 压缩文件格式有误时抛出   * @throws IOException 当解压缩过程出错时抛出   */  public static ArrayList getEntriesNames(File zipFile) throws ZipException, IOException {    ArrayList entryNames = new ArrayList();    Enumeration<?> entries = getEntriesEnumeration(zipFile);    while (entries.hasMoreElements()) {      ZipEntry entry = ((ZipEntry)entries.nextElement());      entryNames.add(new String(getEntryName(entry).getBytes("GB2312"), "8859_1"));    }    return entryNames;  }  /**   * 获得压缩文件内压缩文件对象以取得其属性   *   * @param zipFile 压缩文件   * @return 返回一个压缩文件列表   * @throws ZipException 压缩文件格式有误时抛出   * @throws IOException IO操作有误时抛出   */  public static Enumeration<?> getEntriesEnumeration(File zipFile) throws ZipException,      IOException {    ZipFile zf = new ZipFile(zipFile);    return zf.entries();  }  /**   * 取得压缩文件对象的注释   *   * @param entry 压缩文件对象   * @return 压缩文件对象的注释   * @throws UnsupportedEncodingException   */  public static String getEntryComment(ZipEntry entry) throws UnsupportedEncodingException {    return new String(entry.getComment().getBytes("GB2312"), "8859_1");  }  /**   * 取得压缩文件对象的名称   *   * @param entry 压缩文件对象   * @return 压缩文件对象的名称   * @throws UnsupportedEncodingException   */  public static String getEntryName(ZipEntry entry) throws UnsupportedEncodingException {    return new String(entry.getName().getBytes("GB2312"), "8859_1");  }  /**   * 压缩文件   *   * @param resFile 需要压缩的文件（夹）   * @param zipout 压缩的目的文件   * @param rootpath 压缩的文件路径   * @throws FileNotFoundException 找不到文件时抛出   * @throws IOException 当压缩过程出错时抛出   */  private static void zipFile(File resFile, ZipOutputStream zipout, String rootpath)      throws FileNotFoundException, IOException {    rootpath = rootpath + (rootpath.trim().length() == 0 ? "" : File.separator)        + resFile.getName();    rootpath = new String(rootpath.getBytes("8859_1"), "GB2312");    if (resFile.isDirectory()) {      File[] fileList = resFile.listFiles();      for (File file : fileList) {        zipFile(file, zipout, rootpath);      }    } else {      byte buffer[] = new byte[BUFF_SIZE];      BufferedInputStream in = new BufferedInputStream(new FileInputStream(resFile),          BUFF_SIZE);      zipout.putNextEntry(new ZipEntry(rootpath));      int realLength;      while ((realLength = in.read(buffer)) != -1) {        zipout.write(buffer, 0, realLength);      }      in.close();      zipout.flush();      zipout.closeEntry();    }  }}

希望本文所述对大家的Android程序设计有所帮助。

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