解压zip文件

/**
	 * 解压zip文件到指定的xml文件
	 * 
	 * @param zipFileName
	 *            文件名及目录
	 * @param outputDirectory
	 *            解压到的目录
	 */
	private void unzip(final String zipFileName, final String outputDirectory) {
		ZipInputStream mIn = null;
		try {
			mIn = new ZipInputStream(new FileInputStream(zipFileName));
			ZipEntry mZip;
			String mFileName = "";
			String mExtractedFile = "";
			int mCounter = 0;
			while ((mZip = mIn.getNextEntry()) != null) {
				mFileName = mZip.getName();
				if (mZip.isDirectory()) {
					mFileName = mFileName.substring(0, mFileName.length() - 1);
					File folder = new File(outputDirectory + File.separator
							+ mFileName);
					folder.mkdirs();
					if (mCounter == 0) {
						mExtractedFile = folder.toString();
					}
					mCounter++;
				} else {
					File mFile = new File(outputDirectory + File.separator
							+ mFileName);
					mFile.createNewFile();
					FileOutputStream mOut = new FileOutputStream(mFile);
					int ch;
					byte[] buffer = new byte[1024];
					while ((ch = mIn.read(buffer)) != -1) {
						mOut.write(buffer, 0, ch);
						mOut.flush();
					}
					mOut.close();
				}
			}
			mIn.close();
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}