接口: javax.obex.SessionNotifier ，扩展了Connection
接口: javax.obex.ClientSession ，扩展了Connection
接口: javax.obex.Operation ，扩展了ContentConnection
BNF:
url ::== tcpObex | irdaObex | btObex
btObex ::== btSrvString | btCliString
tcpObex ::== tcpSrvString | tcpCliString
irdaObex ::== irdaSrvString | irdaCliString
tcpCliString ::== "tcpobex" ":" "//" tcpHost
tcpSrvString ::== "tcpobex" ":" "//" 0*1(ipPort)
ipPort ::== 1*(DIGIT)
ipAddress ::== 3*3(%d0-255 ".") (%d0-255)
ipName ::== 1*( hostLabel "." ) topLabel
topLabel ::== ALPHA | ALPHA *(alphaNum | "-") alphaNum
