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package com.mingsoft.util;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
import java.util.zip.ZipOutputStream;

import org.apache.tools.zip.ZipEntry;
import org.apache.tools.zip.ZipFile;

/**
 * 铭飞MS平台-zip通用工具
 * @author 铭飞开发团队
 * @version 
 * 版本号：100-000-000

 * 创建日期：2016年1月3日

 * 历史修订：

 */
public class ZipUtil {

	/**
	 * 解压文件到指定目录
	 * 
	 * @param zipFile
	 *            压缩包文件
	 * @param descDir
	 *            解压后文件路径
	 */
	@SuppressWarnings("rawtypes")
	public static void unZipFiles(File zipFile, String descDir) throws IOException {
		File pathFile = new File(descDir);
		if (!pathFile.exists()) {
			pathFile.mkdirs();
		}
		ZipFile zip = new ZipFile(zipFile);
		for (Enumeration entries = zip.getEntries(); entries.hasMoreElements();) {
			ZipEntry entry = (ZipEntry) entries.nextElement();
			String zipEntryName = entry.getName();
			InputStream in = zip.getInputStream(entry);
			String outPath = (descDir + zipEntryName).replaceAll("\\*", "/");
			outPath = new String(outPath.getBytes("utf-8"), "ISO8859-1");
			// 判断路径是否存在,不存在则创建文件路径
			File file = new File(outPath.substring(0, outPath.lastIndexOf('/')));
			if (!file.exists()) {
				file.mkdirs();
			}
			// 判断文件全路径是否为文件夹,如果是上面已经上传,不需要解压
			if (new File(outPath).isDirectory()) {
				continue;
			}
			OutputStream out = new FileOutputStream(outPath);
			byte[] buf1 = new byte[1024];
			int len;
			while ((len = in.read(buf1)) > 0) {
				out.write(buf1, 0, len);
			}
			in.close();
			out.close();
		}
	}

	/**
	 * 递归压缩文件
	 * 
	 * @param source
	 *            源路径,可以是文件,也可以目录
	 * @param destinct
	 *            目标路径,压缩文件名
	 * @throws IOException
	 */
	public static void compress(String source, String destinct) throws IOException {
		List fileList = loadFilename(new File(source));
		ZipOutputStream zos = new ZipOutputStream(new FileOutputStream(new File(destinct)));

		byte[] buffere = new byte[8192];
		int length;
		BufferedInputStream bis;

		for (int i = 0; i < fileList.size(); i++) {
			File file = (File) fileList.get(i);
			zos.putNextEntry(new ZipEntry(getEntryName(source, file)));
			bis = new BufferedInputStream(new FileInputStream(file));

			while (true) {
				length = bis.read(buffere);
				if (length == -1)
					break;
				zos.write(buffere, 0, length);
			}
			bis.close();
			zos.closeEntry();
		}
		zos.close();
	}

	/**
	 * 递归获得该文件下所有文件名(不包括目录名)
	 * 
	 * @param file
	 * @return
	 */
	private static List loadFilename(File file) {
		List filenameList = new ArrayList();
		if (file.isFile()) {
			filenameList.add(file);
		}
		if (file.isDirectory()) {
			for (File f : file.listFiles()) {
				filenameList.addAll(loadFilename(f));
			}
		}
		return filenameList;
	}

	/**
	 * 获得zip entry 字符串
	 * 
	 * @param base
	 * @param file
	 * @return
	 */
	private static String getEntryName(String base, File file) {
		File baseFile = new File(base);
		String filename = file.getPath();
		// int index=filename.lastIndexOf(baseFile.getName());
		if (baseFile.getParentFile().getParentFile() == null)
			return filename.substring(baseFile.getParent().length());
		return filename.substring(baseFile.getParent().length() + 1);
	}

	private static final int buffer = 2048;

	/**
	 * 解压Zip文件
	 * 
	 * @param path
	 *            文件目录
	 */
	public static void unZip(String path, String savepath) {
		int count = -1;
		File file = null;
		InputStream is = null;
		FileOutputStream fos = null;
		BufferedOutputStream bos = null;
		new File(savepath).mkdir(); // 创建保存目录
		ZipFile zipFile = null;
		try {
			zipFile = new ZipFile(path, "gbk"); // 解决中文乱码问题
			Enumeration entries = zipFile.getEntries();

			while (entries.hasMoreElements()) {
				byte buf[] = new byte[buffer];

				ZipEntry entry = (ZipEntry) entries.nextElement();

				String filename = entry.getName();
				boolean ismkdir = false;
				if (filename.lastIndexOf("/") != -1) { // 检查此文件是否带有文件夹
					ismkdir = true;
				}
				filename = savepath + filename;

				if (entry.isDirectory()) { // 如果是文件夹先创建
					file = new File(filename);
					file.mkdirs();
					continue;
				}
				file = new File(filename);
				if (!file.exists()) { // 如果是目录先创建
					if (ismkdir) {
						new File(filename.substring(0, filename.lastIndexOf("/"))).mkdirs(); // 目录先创建
					}
				}
				file.createNewFile(); // 创建文件

				is = zipFile.getInputStream(entry);
				fos = new FileOutputStream(file);
				bos = new BufferedOutputStream(fos, buffer);

				while ((count = is.read(buf)) > -1) {
					bos.write(buf, 0, count);
				}
				bos.flush();
				bos.close();
				fos.close();

				is.close();
			}

			zipFile.close();

		} catch (IOException ioe) {
			ioe.printStackTrace();
		} finally {
			try {
				if (bos != null) {
					bos.close();
				}
				if (fos != null) {
					fos.close();
				}
				if (is != null) {
					is.close();
				}
				if (zipFile != null) {
					zipFile.close();
				}
			} catch (Exception e) {
				e.printStackTrace();
			}
		}
	}
}