C#之数据流和字符串压缩

来源：互联网发布：樱井知香番号封面编辑：程序博客网时间：2024/05/29 08:09
.Net自带的类库，System.IO.Compress中自带GZip压缩。
using System;using System.IO;using System.IO.Compression;using System.Text;public class GZipUtil {/// <summary>  /// 字节数组压缩  /// </summary>  /// <param name="strSource"></param>  /// <returns></returns>  public static byte[] Compress(byte[] data)  {  try  {  MemoryStream ms = new MemoryStream();  GZipStream zip = new GZipStream(ms, CompressionMode.Compress, true);  zip.Write(data, 0, data.Length);  zip.Close();  byte[] buffer = new byte[ms.Length];  ms.Position = 0;  ms.Read(buffer, 0, buffer.Length);  ms.Close();  return buffer;  }  catch (Exception e)  {  throw new Exception(e.Message);  }  } /// <summary>  /// 字节数组解压缩  /// </summary>  /// <param name="strSource"></param>  /// <returns></returns>  public static byte[] Decompress(byte[] data)  {  try  {  MemoryStream ms = new MemoryStream(data);  GZipStream zip = new GZipStream(ms, CompressionMode.Decompress, true);  MemoryStream msreader = new MemoryStream();  byte[] buffer = new byte[0x1000];  while (true)  {  int reader = zip.Read(buffer, 0, buffer.Length);  if (reader <= 0)  {  break;  }  msreader.Write(buffer, 0, reader);  }  zip.Close();  ms.Close();  msreader.Position = 0;  buffer = msreader.ToArray();  msreader.Close();  return buffer;  }  catch (Exception e)  {  throw new Exception(e.Message);  }  }  /// <summary>/// 字符串压缩/// </summary>/// <returns>The string.</returns>/// <param name="str">String.</param>public static string CompressString(string str)  {  string compressString = "";  byte[] compressBeforeByte = Encoding.UTF8.GetBytes(str);  byte[] compressAfterByte = Compress(compressBeforeByte);  //compressString = Encoding.GetEncoding("UTF-8").GetString(compressAfterByte);    compressString = Convert.ToBase64String(compressAfterByte);  return compressString;  }  /// <summary>/// 字符串解压缩/// </summary>/// <returns>The string.</returns>/// <param name="str">String.</param>public static string DecompressString(string str)  {  string compressString = "";  //byte[] compressBeforeByte = Encoding.GetEncoding("UTF-8").GetBytes(str);    byte[] compressBeforeByte = Convert.FromBase64String(str);  byte[] compressAfterByte = Decompress(compressBeforeByte);  compressString = Encoding.UTF8.GetString(compressAfterByte);  return compressString;  }  }
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