Java Calendar日历与Date日期的相互转换详解

public static Date calendarToData(int year, int month, int day) {  Calendar calendar = Calendar.getInstance();//日历类的实例化  calendar.set(year, month - 1, day);//设置日历时间，月份必须减一  Date date = calendar.getTime(); // 从一个 Calendar 对象中获取 Date 对象  return date; } System.out.println(calendarToData(2017,3,16));//打印测试

 public static Calendar dataToCalendar(Date date) {  Calendar calendar = Calendar.getInstance();  calendar.setTime(date);  return calendar; } Date date = new Date();//直接new对象，获取的是当前时间 System.out.println(dataToCalendar(date));//打印测试