网址的编码函数，支持200多种编码类型，例如utf-7,ascii-us,-url encoder function

URL 加解码工具 例如：http://www.pudn.com/a.b_jsp?id=2324 URL编码后为 http 3A//www.pudn.com/a.b_jsp 3Fid 3D2324 -URL Encoder/Decoder Example: http://www.pudn.com/ is Encoded as http 3A//www.pudn.com/a.b_jsp 3Fid 3D2324