/**

      * 解压缩文件到指定的目录.

      *

      * @param unZipfileName

      *            需要解压缩的文件（带路径）

      * @param mDestPath

      *            解压缩后存放的路径

      **/

     public static void unZip(String unZipfileName, String mDestPath) {

         if (!mDestPath.endsWith("/")) {

             mDestPath = mDestPath + "/";

         }

         FileOutputStream fileOut = null;

         ZipInputStream zipIn = null;

         ZipEntry zipEntry = null;

         File file = null;

         int readedBytes = 0;

         byte buf[] = new byte[4096];

         try {

             zipIn = new ZipInputStream(new BufferedInputStream(

                     new FileInputStream(unZipfileName)));

             while ((zipEntry = zipIn.getNextEntry()) != null) {

                 file = new File(mDestPath + zipEntry.getName());

                 if (zipEntry.isDirectory()) {

                     file.mkdirs();

                 } else {

                     // 如果指定文件的目录不存在,则创建之.

                     File parent = file.getParentFile();

                     if (!parent.exists()) {

                         parent.mkdirs();

                     }

                     fileOut = new FileOutputStream(file);

                     while ((readedBytes = zipIn.read(buf)) > 0) {

                         fileOut.write(buf, 0, readedBytes);

                     }

                     fileOut.close();

                 }

                 zipIn.closeEntry();

             }

         } catch (IOException ioe) {

             ioe.printStackTrace();

         }

     }