using ICSharpCode.SharpZipLib.BZip2;
using System;
using System.IO;
using System.Text;

namespace EntrustSettle.Common
{
    public class SharpZipLib
    {

        /// <summary>
        /// 数据压缩
        /// </summary>
        /// <param name="input"></param>
        /// <returns></returns>
        public static string Compress(string input)
        {
            string result = string.Empty;
            byte[] buffer = Encoding.UTF8.GetBytes(input);
            using (MemoryStream outputStream = new MemoryStream())
            {
                using (BZip2OutputStream zipStream = new BZip2OutputStream(outputStream))
                {
                    zipStream.Write(buffer, 0, buffer.Length);
                    zipStream.Close();
                }
                return Convert.ToBase64String(outputStream.ToArray());
            }
        }
        /// <summary>
        /// 数据解压缩
        /// </summary>
        /// <param name="input"></param>
        /// <returns></returns>
        public static string Decompress(string input)
        {
            string result = string.Empty;
            byte[] buffer = Convert.FromBase64String(input);
            using (Stream inputStream = new MemoryStream(buffer))
            {
                BZip2InputStream zipStream = new BZip2InputStream(inputStream);

                using (StreamReader reader = new StreamReader(zipStream, Encoding.UTF8))
                {
                    //输出
                    result = reader.ReadToEnd();
                }
            }

            return result;
        }
    }
}