java日历类Calendar简单使用

import java.util.Calendar;
import java.util.TimeZone;

public class Test1 {

public static void main(String[] args) {

//指定东八区，即北京时间
Calendar cc = Calendar.getInstance(TimeZone.getTimeZone("GMT+8"));
int year = cc.get(Calendar.YEAR);

//月份是从0开始计数的，所以此处进行加1
int month = cc.get(Calendar.MONTH)+1;
int day = cc.get(Calendar.DAY_OF_MONTH);

int hour_8 = cc.get(Calendar.HOUR);//8小时制
int hour_24 = cc.get(Calendar.HOUR_OF_DAY);//24小时制

int minute = cc.get(Calendar.MINUTE);
int second = cc.get(Calendar.SECOND);

//需减一（西方一周的第一天是周日）
int weekday = cc.get(Calendar.DAY_OF_WEEK)-1;

//8小时制输出
System.out.println(year+"-"+month+"-"+day+" "+hour_8+":"+minute+":"+second+" 星期"+weekday);

//24小时制输出
System.out.println(year+"-"+month+"-"+day+" "+hour_24+":"+minute+":"+second+" 星期"+weekday);
}
}