nl_tokens: 按周获得某几周周一 00 : 00 : 00 到周六 的时间范围 <p > 它会根据给定的 offL 和 offR 得到一个时间范围 <p > 对本函数来说 week ( - 3 - 5 ) 和 week ( - 5 - 3 ) 是一个意思
pl_tokens: public static Date [ ] weeks ( long base , int offL , int offR ) { int from = Math . <mask> ( offL , offR ) ; int len = Math . abs ( offL - offR ) ; // 现在
   Calendar c = Calendar . getInstance ( ) ; c . setTimeInMillis ( base ) ; Date [ ] re = new Date [ 2 ] ; // 计算开始
   c . add ( Calendar . DAY_OF_YEAR , 7 * from ) ; c . set ( Calendar . DAY_OF_WEEK , Calendar . MONDAY ) ; c . set ( Calendar . HOUR_OF_DAY , 0 ) ; c . set ( Calendar . MINUTE , 0 ) ; c . set ( Calendar . SECOND , 0 ) ; c . set ( Calendar . MILLISECOND , 0 ) ; re [ 0 ] = c . getTime ( ) ; // 计算结束
   c . add ( Calendar . DAY_OF_YEAR , 7 * ( len + 1 ) ) ; c . add ( Calendar . MILLISECOND , - 1 ) ; re [ 1 ] = c . getTime ( ) ; // 返回
   return re ; }