Java 日历类 Calendar 相关方法

package com.xmercury.test;

import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;

public class CalendarUsage {

	/**
	 * @param args
	 * @author 熊佳佳
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub

		Calendar calendar = new GregorianCalendar();
//		Calendar c = Calendar.getInstance(); 
		Date currentDate = new Date();
		calendar.setTime(currentDate);
		System.out.println("ERA: " + calendar.get(Calendar.ERA));
		System.out.println("YEAR: " + calendar.get(Calendar.YEAR));
		System.out.println("MONTH: " + calendar.get(Calendar.MONTH));
		System.out.println("WEEK_OF_YEAR: "
				+ calendar.get(Calendar.WEEK_OF_YEAR));
		System.out.println("WEEK_OF_MONTH: "
				+ calendar.get(Calendar.WEEK_OF_MONTH));
		System.out.println("DATE: " + calendar.get(Calendar.DATE));
		System.out.println("DAY_OF_MONTH: "
				+ calendar.get(Calendar.DAY_OF_MONTH));
		System.out
				.println("DAY_OF_YEAR: " + calendar.get(Calendar.DAY_OF_YEAR));
		System.out
				.println("DAY_OF_WEEK: " + calendar.get(Calendar.DAY_OF_WEEK));
		System.out.println("DAY_OF_WEEK_IN_MONTH: "
				+ calendar.get(Calendar.DAY_OF_WEEK_IN_MONTH));
		System.out.println("AM_PM: " + calendar.get(Calendar.AM_PM));
		System.out.println("HOUR: " + calendar.get(Calendar.HOUR));
		System.out
				.println("HOUR_OF_DAY: " + calendar.get(Calendar.HOUR_OF_DAY));
		System.out.println("MINUTE: " + calendar.get(Calendar.MINUTE));
		System.out.println("SECOND: " + calendar.get(Calendar.SECOND));
		System.out
				.println("MILLISECOND: " + calendar.get(Calendar.MILLISECOND));
		System.out.println("ZONE_OFFSET: "
				+ (calendar.get(Calendar.ZONE_OFFSET) / (60 * 60 * 1000)));
		System.out.println("DST_OFFSET: "
				+ (calendar.get(Calendar.DST_OFFSET) / (60 * 60 * 1000)));
	}
}

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;


public class Main {

	/**
	 * @param args
	 * @throws ParseException 
	 * @author 熊佳佳
	 */
	public static void main(String[] args) throws ParseException {
		// TODO Auto-generated method stub

		Calendar c=new GregorianCalendar();
		DateFormat dateFormat=new SimpleDateFormat("yyyyMMdd");   
		Date date = dateFormat.parse("20120702");  
		c.setTime(date);
		System.out.println((c.get(Calendar.MONTH)+1)+" "+c.get(Calendar.DAY_OF_MONTH));
		c.add(Calendar.DAY_OF_MONTH, -1);
		System.out.println((c.get(Calendar.MONTH)+1)+" "+c.get(Calendar.DAY_OF_MONTH));
		c.add(Calendar.DAY_OF_MONTH, -6);
		System.out.println((c.get(Calendar.MONTH)+1)+" "+c.get(Calendar.DAY_OF_MONTH));
		
	}
}

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;

public class Main {

	/**
	 * @param args
	 * @throws ParseException
	 */
	public static void main(String[] args) throws ParseException {
		// TODO Auto-generated method stub
		DateFormat dateFormat = new SimpleDateFormat("yyyyMMddHHmm");
		Date date = dateFormat.parse("201209081101");

		DateUtils util = new DateUtils();
		// System.out.println(util.getMovieBeginTime(date) + "1200");
		// System.out.println(util.getMovieEndTime(date) + "1200");
		System.out.println(util.verifyMovieTime(date));
	}
}

class DateUtils {

	Calendar c = new GregorianCalendar();

	SimpleDateFormat dateFormat = new SimpleDateFormat("yyyyMMdd");

	public boolean verifyMovieTime(Date date) throws NumberFormatException,
			ParseException {

		SimpleDateFormat dateFormat = new SimpleDateFormat("yyyyMMddHHmm");

		Long a = Long.parseLong(getMovieBeginTime(date) + "1200");

		Long b = Long.parseLong(getMovieEndTime(date) + "1200");

		Long c = Long.parseLong(dateFormat.format(date));

		if (c > a && c < b) {

			return true;
		}

		return false;
	}

	public String getMovieEndTime(Date computeDate) throws ParseException {

		this.c.setTime(computeDate);

		int i = c.get(Calendar.DAY_OF_WEEK);

		if (i == 1) {
			c.add(c.DAY_OF_WEEK, -2);
		} else if (i == 2) {
			c.add(c.DAY_OF_WEEK, 4);
		} else if (i == 6) {
			c.add(c.DAY_OF_WEEK, 0);
		} else if (i == 7) {
			c.add(c.DAY_OF_WEEK, -1);
		} else if (i > 2 && i < 6) {
			c.add(c.DAY_OF_WEEK, 6 - i);
		}

		Date beginDate = this.c.getTime();

		String str = this.dateFormat.format(beginDate);

		return str;
	}

	public String getMovieBeginTime(Date computeDate) throws ParseException {

		this.c.setTime(computeDate);

		int i = c.get(Calendar.DAY_OF_WEEK);

		if (i == 2) {
			c.add(c.DAY_OF_WEEK, 0);
		} else if (i > 2) {
			c.add(c.DAY_OF_WEEK, 2 - i);
		} else if (i == 1) {
			c.add(c.DAY_OF_WEEK, -6);
		}

		Date beginDate = this.c.getTime();

		String str = this.dateFormat.format(beginDate);

		return str;
	}

	public String getRankingBeginTime(Date computeDate) throws ParseException {

		this.c.setTime(computeDate);

		System.out.println("c.getTime():" + c.getTime());

		System.out.println("c.get(Calendar.DAY_OF_WEEK):"
				+ c.get(Calendar.DAY_OF_WEEK));

		int i = c.get(Calendar.DAY_OF_WEEK);

		System.out.println("i:" + i);

		if (i == 2) {
			c.add(c.DAY_OF_WEEK, 0);
		} else if (i > 2) {
			c.add(c.DAY_OF_WEEK, 2 - i);
		} else if (i == 1) {
			c.add(c.DAY_OF_WEEK, -6);
		}

		System.out.println("c.get(Calendar.DAY_OF_WEEK):"
				+ c.get(Calendar.DAY_OF_WEEK));

		Date beginDate = this.c.getTime();

		String str = this.dateFormat.format(beginDate);

		return str;
	}
}