GZip对字符串压缩和解压

发布时间:2016-12-9 16:07:09 编辑:www.fx114.net 分享查询网我要评论
本篇文章主要介绍了"GZip对字符串压缩和解压",主要涉及到GZip对字符串压缩和解压方面的内容,对于GZip对字符串压缩和解压感兴趣的同学可以参考一下。

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.IO; using System.IO.Compression; using System.Data; namespace Lis2013HISWSTest { public class ZipHelper { /// <summary> /// 解压 /// </summary> /// <param name="Value"></param> /// <returns></returns> public static DataSet GetDatasetByString(string Value) { DataSet ds = new DataSet(); string CC = GZipDecompressString(Value); System.IO.StringReader Sr = new StringReader(CC); ds.ReadXml(Sr); return ds; } /// <summary> /// 根据DATASET压缩字符串 /// </summary> /// <param name="ds"></param> /// <returns></returns> public static string GetStringByDataset(string ds) { return GZipCompressString(ds); } /// <summary> /// 将传入字符串以GZip算法压缩后,返回Base64编码字符 /// </summary> /// <param name="rawString">需要压缩的字符串</param> /// <returns>压缩后的Base64编码的字符串</returns> public static string GZipCompressString(string rawString) { if (string.IsNullOrEmpty(rawString) || rawString.Length == 0) { return ""; } else { byte[] rawData = System.Text.Encoding.UTF8.GetBytes(rawString.ToString()); byte[] zippedData = Compress(rawData); return (string)(Convert.ToBase64String(zippedData)); } } /// <summary> /// GZip压缩 /// </summary> /// <param name="rawData"></param> /// <returns></returns> public static byte[] Compress(byte[] rawData) { MemoryStream ms = new MemoryStream(); GZipStream compressedzipStream = new GZipStream(ms, CompressionMode.Compress, true); compressedzipStream.Write(rawData, 0, rawData.Length); compressedzipStream.Close(); return ms.ToArray(); } /// <summary> /// 将传入的二进制字符串资料以GZip算法解压缩 /// </summary> /// <param name="zippedString">经GZip压缩后的二进制字符串</param> /// <returns>原始未压缩字符串</returns> public static string GZipDecompressString(string zippedString) { if (string.IsNullOrEmpty(zippedString) || zippedString.Length == 0) { return ""; } else { byte[] zippedData = Convert.FromBase64String(zippedString.ToString()); return (string)(System.Text.Encoding.UTF8.GetString(Decompress(zippedData))); } } /// <summary> /// ZIP解压 /// </summary> /// <param name="zippedData"></param> /// <returns></returns> public static byte[] Decompress(byte[] zippedData) { MemoryStream ms = new MemoryStream(zippedData); GZipStream compressedzipStream = new GZipStream(ms, CompressionMode.Decompress); MemoryStream outBuffer = new MemoryStream(); byte[] block = new byte[1024]; while (true) { int bytesRead = compressedzipStream.Read(block, 0, block.Length); if (bytesRead <= 0) break; else outBuffer.Write(block, 0, bytesRead); } compressedzipStream.Close(); return outBuffer.ToArray(); } } }

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