判断今天是不是本周

 SimpleDateFormat myFormatter = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
String date  = "2018-01-21 20:36:38";
Date t1=  myFormatter.parse(date);
 
Calendar calendar = Calendar.getInstance();  

        int currentWeek = calendar.get(Calendar.WEEK_OF_YEAR);  

        calendar.setTime(t1) ;

        int paramWeek = calendar.get(Calendar.WEEK_OF_YEAR);  

        if(paramWeek==currentWeek){  

            System.out.println("是本周"); 

        } else{

        System.out.println("不是本周"); 

        }