用java 输出合理的日期,从一月到12月。4,6,9,11月有30天,2月 28天...答:import java.util.Calendar;class CalendarText { int allday;Calendar cal;public void init(int m, int n) { int[] days = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };cal = Calendar.getInstance();cal.set(Calendar.YEAR, m);cal.set(Calendar.MONTH, n - 1);...