C#对字符串进行压缩和解压缩的算法代码,字符串通过base64编码后传输
代码转自:http://www.cnblogs.com/luoxiaojie/
public class Compression { /// <summary> /// 对字符串进行压缩 /// </summary> /// <param name="str">待压缩的字符串</param> /// <returns>压缩后的字符串</returns> public static string CompressString(string str) { string compressString = ""; byte[] compressBeforeByte = Encoding.GetEncoding("UTF-8").GetBytes(str); byte[] compressAfterByte=Compress(compressBeforeByte); //compressString = Encoding.GetEncoding("UTF-8").GetString(compressAfterByte); compressString = Convert.ToBase64String(compressAfterByte); return compressString; } /// <summary> /// 对字符串进行解压缩 /// </summary> /// <param name="str">待解压缩的字符串</param> /// <returns>解压缩后的字符串</returns> 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.GetEncoding("UTF-8").GetString(compressAfterByte); return compressString; } /// <summary> /// 对文件进行压缩 /// </summary> /// <param name="sourceFile">待压缩的文件名</param> /// <param name="destinationFile">压缩后的文件名</param> public static void CompressFile(string sourceFile, string destinationFile) { throw new Exception("The method or operation is not implemented."); } /// <summary> /// 对文件进行解压缩 /// </summary> /// <param name="sourceFile">待解压缩的文件名</param> /// <param name="destinationFile">解压缩后的文件名</param> /// <returns></returns> public static void DecompressFile(string sourceFile, string destinationFile) { throw new Exception("The method or operation is not implemented."); } /// <summary> /// 对byte数组进行压缩 /// </summary> /// <param name="data">待压缩的byte数组</param> /// <returns>压缩后的byte数组</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); } } 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); } } }