获取当前时间的月的最后一天

Calendar c = Calendar.getInstance();
c.setTime(new Date());
c.set(Calendar.DAY_OF_MONTH, c.getActualMaximum(Calendar.DAY_OF_MONTH));

SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
String last= format.format(c.getTime());
System.out.println(last);