C#实现压缩和解压缩的方法示例【Gzip和Zip方式】
发布时间:2020-12-15 06:04:53 所属栏目:百科 来源:网络整理
导读:本篇章节讲解C#实现压缩和解压缩的方法。供大家参考研究具体如下: 使用ICSharpCode.SharpZipLib.dll来压缩/解压(压缩效率比GZip要高一点) public static class ZipUtil{ /// summary /// 压缩 /// /summary /// param name="param"/param /// r
本篇章节讲解C#实现压缩和解压缩的方法。分享给大家供大家参考,具体如下: 使用ICSharpCode.SharpZipLib.dll来压缩/解压(压缩效率比GZip要高一点) public static class ZipUtil { /// <summary> /// 压缩 /// </summary> /// <param name="param"></param> /// <returns></returns> public static string Compress(string param) { byte[] data = System.Text.Encoding.UTF8.GetBytes(param); //byte[] data = Convert.FromBase64String(param); MemoryStream ms = new MemoryStream(); Stream stream = new ICSharpCode.SharpZipLib.BZip2.BZip2OutputStream(ms); try { stream.Write(data,data.Length); } finally { stream.Close(); ms.Close(); } return Convert.ToBase64String(ms.ToArray()); } /// <summary> /// 解压 /// </summary> /// <param name="param"></param> /// <returns></returns> public static string Decompress(string param) { string commonString = ""; byte[] buffer = Convert.FromBase64String(param); MemoryStream ms = new MemoryStream(buffer); Stream sm = new ICSharpCode.SharpZipLib.BZip2.BZip2InputStream(ms); //这里要指明要读入的格式,要不就有乱码 StreamReader reader = new StreamReader(sm,System.Text.Encoding.UTF8); try { commonString = reader.ReadToEnd(); } finally { sm.Close(); ms.Close(); } return commonString; } } 使用GZip来压缩/解压缩(字符串) public static class GZipUtil { public static string Zip(string value) { //Transform string into byte[] byte[] byteArray = new byte[value.Length]; int indexBA = 0; foreach (char item in value.ToCharArray()) { byteArray[indexBA++] = (byte)item; } //Prepare for compress System.IO.MemoryStream ms = new System.IO.MemoryStream(); System.IO.Compression.GZipStream sw = new System.IO.Compression.GZipStream(ms,System.IO.Compression.CompressionMode.Compress); //Compress sw.Write(byteArray,byteArray.Length); //Close,DO NOT FLUSH cause bytes will go missing... sw.Close(); //Transform byte[] zip data to string byteArray = ms.ToArray(); System.Text.StringBuilder sB = new System.Text.StringBuilder(byteArray.Length); foreach (byte item in byteArray) { sB.Append((char)item); } ms.Close(); sw.Dispose(); ms.Dispose(); return sB.ToString(); } public static string UnZip(string value) { //Transform string into byte[] byte[] byteArray = new byte[value.Length]; int indexBA = 0; foreach (char item in value.ToCharArray()) { byteArray[indexBA++] = (byte)item; } //Prepare for decompress System.IO.MemoryStream ms = new System.IO.MemoryStream(byteArray); System.IO.Compression.GZipStream sr = new System.IO.Compression.GZipStream(ms,System.IO.Compression.CompressionMode.Decompress); //Reset variable to collect uncompressed result byteArray = new byte[byteArray.Length]; //Decompress int rByte = sr.Read(byteArray,byteArray.Length); //Transform byte[] unzip data to string System.Text.StringBuilder sB = new System.Text.StringBuilder(rByte); //Read the number of bytes GZipStream red and do not a for each bytes in //resultByteArray; for (int i = 0; i < rByte; i++) { sB.Append((char)byteArray[i]); } sr.Close(); ms.Close(); sr.Dispose(); ms.Dispose(); return sB.ToString(); } } 更多关于C#相关内容感兴趣的读者可查看本站专题:《C#常见控件用法教程》、《WinForm控件用法总结》、《C#数据结构与算法教程》、《C#面向对象程序设计入门教程》及《C#程序设计之线程使用技巧总结》 希望本文所述对大家C#程序设计有所帮助。 (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |