simpleformat simpledateformat用法
~[UNK][UNK]Simplifiedformat SDF=new simpledateformat（“yyymmddhhmmss”）simpledateformat SDF=new simple
~[UNK][UNK]Simplifiedformat SDF=new simpledateformat（“yyymmddhhmmss”）simpledateformat SDF=new simpledateformat（“yymmdhhmmss”）//SSS为毫秒