1 package day0603; 2  3 import java.text.ParseException; 4 import java.text.SimpleDateFormat; 5 import java.util.Calendar; 6 import java.util.Date; 7 import java.util.Scanner; 8  9 public class Demo3 {    //2015-06-0310     public static void main(String[] args) {11         System.out.print("请输入日期(yyyy-MM-dd):");12         Scanner scan = new Scanner(System.in);13         String str = scan.next();14         System.out.println(" ---------------------------");15         System.out.println("星期日 星期一 星期二 星期三 星期四 星期五 星期六");16 17         SimpleDateFormat  simple = new SimpleDateFormat("yyyy-MM-dd");18         Date date = null;19         try {20             date = simple.parse(str);21         } catch (ParseException e) {22             // TODO Auto-generated catch block23             e.printStackTrace();24         }25          Calendar c = Calendar.getInstance();//日历当前时间，换成自定义时间26         // c.clear();27          c.setTime(date);28 29          int today = c.get(Calendar.DAY_OF_MONTH);    //获取当前天数30 31          c.set(Calendar.DAY_OF_MONTH, 1);  // 设置当前“天”为1号32          int firstWeekday = c.get(Calendar.DAY_OF_WEEK); // 1号是周几？33          int j = 1;34             while(j < firstWeekday ) {35                 System.out.printf("%4s", " ");36                 j ++ ;37             }38          int last = c.getActualMaximum(Calendar.DAY_OF_MONTH);    //获取本月最大天数 39 40             for(int k = 1;k <= last;k++) {41                    if(today == k){  // *号表示今天42                         System.out.printf("%4s",("*"+k));43                    }else{     44                         System.out.printf("%4s", k);45                    }46                 if((j+k-1) % 7 == 0)47                     System.out.println();48 49             }             50     }51 52 }