Delphi System.NetEncoding

提供了网络交互相关的字符串转换函数，比如：

TNetEncoding.URL.Encode  <==> TNetEncoding.URL.Decode

TNetEncoding.Base64.Encode <==> TNetEncoding.Base64.Decode

TNetEncoding.HTML.Encode <==> TNetEncoding.HTML.Decode