package com.chinacreator.videoalliance.order.util;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.zip.GZIPInputStream;
import java.util.zip.GZIPOutputStream;

import com.chinacreator.common.util.Base64;

public class ZipUtils {

	/**
	 * 
	 * 使用gzip进行压缩
	 */
	public static String gzip(String primStr) {
		if (primStr == null || primStr.length() == 0) {
			return primStr;
		}
		ByteArrayOutputStream out = new ByteArrayOutputStream();
		GZIPOutputStream gzip = null;
		try {
			gzip = new GZIPOutputStream(out);
			gzip.write(primStr.getBytes());
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			if (gzip != null) {
				try {
					gzip.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
		return new sun.misc.BASE64Encoder().encode(out.toByteArray());
	}

	/**
	 *
	 * <p>
	 * Description:使用gzip进行解压缩
	 * </p>
	 * 
	 * @param compressedStr
	 * @return
	 */
	public static String gunzip(String compressedStr) {
		if (compressedStr == null) {
			return null;
		}

		ByteArrayOutputStream out = new ByteArrayOutputStream();
		ByteArrayInputStream in = null;
		GZIPInputStream ginzip = null;
		byte[] compressed = null;
		String decompressed = null;
		try {
			compressed = new sun.misc.BASE64Decoder().decodeBuffer(compressedStr);
			in = new ByteArrayInputStream(compressed);
			ginzip = new GZIPInputStream(in);

			byte[] buffer = new byte[1024];
			int offset = -1;
			while ((offset = ginzip.read(buffer)) != -1) {
				out.write(buffer, 0, offset);
			}
			decompressed = out.toString();
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			if (ginzip != null) {
				try {
					ginzip.close();
				} catch (IOException e) {
				}
			}
			if (in != null) {
				try {
					in.close();
				} catch (IOException e) {
				}
			}
			if (out != null) {
				try {
					out.close();
				} catch (IOException e) {
				}
			}
		}

		return decompressed;
	}

	public static void main(String[] args) throws IOException {
		String loaclbeas = Base64.encodeBase64String("我wo阿斯u安萨地方".getBytes());
		System.out.println(loaclbeas);
		System.out.println(new String(Base64.decodeBase64(loaclbeas.getBytes()),"UTF-8"));
	}
}