字符串压缩c语言（用c语言实现字符串压缩）

嗯，就是将比较大的字符串进行压缩，使其占用空间小一点，我一般用在有时候接口间需要传输大量数据的时候（json数据较大或者含有base64），缩小体积以加快传输小效率。

实现功能：

压缩和解压字符串

开发环境：

开发工具： Visual Studio 2013

.NET Framework版本：4.5

实现代码：

string fileData = "", compress = "";
  private void btnPath_Click(object sender, EventArgs e)
  {
      OpenFileDialog ofd = new OpenFileDialog();
      if (ofd.ShowDialog() == DialogResult.OK)
      {
          textBox1.Text = ofd.FileName;
          FileInfo fi = new FileInfo(ofd.FileName);
          GetSize(fi.Length, lbFile);
          fileData = File.ReadAllText(ofd.FileName);
      }
  }

  private void btnCompress_Click(object sender, EventArgs e)
  {
      compress = Compress(fileData);
      GetSize(Encoding.Default.GetBytes(compress).Length, lbCompress);
      MessageBox.Show("成功");
  }

  private void btnDecompress_Click(object sender, EventArgs e)
  {
      richTextBox1.Text = Decompress(compress);
      MessageBox.Show("成功");


  }

  //压缩字符串
  public string Compress(string value)
  {
      try
      {
          string data = "";
          byte[] byteArray = Encoding.Default.GetBytes(value);
          using (MemoryStream ms = new MemoryStream())
          {
              using (GZipStream sw = new GZipStream(ms, CompressionMode.Compress))
              {
                  sw.Write(byteArray, 0, byteArray.Length);
                  GetSize(ms.Length, lbCompress);
              }

              data = Convert.ToBase64String(ms.ToArray());
          }
          return data;

      }
      catch (Exception ex)
      {
          throw ex;
      }
  }

  //解压缩字符串
  public string Decompress(string value)
  {
      try
      {
          string data = "";
          byte[] bytes = Convert.FromBase64String(value);
          using (MemoryStream msReader = new MemoryStream())
          {
              using (MemoryStream ms = new MemoryStream(bytes))
              {
                  using (GZipStream zip = new GZipStream(ms, CompressionMode.Decompress))
                  {
                      byte[] buffer = new byte[1024];
                      int readLen = 0;
                      while ((readLen = zip.Read(buffer, 0, buffer.Length)) > 0)
                      {
                          msReader.Write(buffer, 0, readLen);
                      }

                  }
              }
              data = Encoding.Default.GetString(msReader.ToArray());
          }
          return data;
      }
      catch (Exception ex)
      {
          throw ex;
      }
  }

  //获取大小
  private void GetSize(long size, Control control)
  {
      string sizeStr = "";
      if (size < 1024)
          sizeStr = size.ToString("F2") + " Byte";
      else if (size >= 1024 && size < 1048576)
          sizeStr = (size / 1024).ToString("F2") + " K";
      else if (size >= 1048576 && size < 1073741824)
          sizeStr = (size / 1024 / 1024).ToString("F2") + " M";
      else if (size >= 1073741824)
          sizeStr = (size / 1024 / 1024 / 1024).ToString("F2") + " G";
      control.Text = sizeStr;
  }

实现效果：