Scanner scanner=new Scanner(System.in);   //创建输入对象
    String s=scanner.nextLine();               //获取输入字符串
    DateFormat it =new SimpleDateFormat("yyyy-MM-dd");
    Date d=it.parse(s);

    Calendar c= new GregorianCalendar();
    c.setTime(d);
    int day=c.get(Calendar.DAY_OF_MONTH);
    c.set(Calendar.DAY_OF_MONTH,1);

    System.out.println("日\t一\t二\t三\t四\t五\t六");
    for(int i=0;i<c.get(Calendar.DAY_OF_WEEK)-1;i++)
    {
        System.out.print("\t");
    }
    int max=c.getActualMaximum(Calendar.DATE);
    for(int i=1;i<=c.getActualMaximum(Calendar.DATE);i++)
    {

        if(i==day)
        {
            System.out.print(i+"*\t");             //在给定日期前加*
        }
        else
        {
            System.out.print(c.get(Calendar.DAY_OF_MONTH)+"\t");
        }
        if(c.get(Calendar.DAY_OF_WEEK)==Calendar.SATURDAY)
        {
            System.out.println();
        }

        c.add(Calendar.DAY_OF_MONTH, 1);
    }