datetime.java

j2me开发的1个简单的wap浏览器.程序框架还是不错的.包括对低级事件的处理.通信框架,标签的解析

/********************************************************************
 * 项目名称				：<b>j2me学习 J2me Wap Explorer</b>			<br/>
 * 
 * Copyright 2005-2006 Wuhua. All rights reserved </br>
 *
 * 本程序只用于学习目的，不能用于商业目的。如有需要请联系作者
 ********************************************************************/
package org.wuhua.wap.util;

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

 

/**
 * <b>类名：DateTime.java</b> </br> 编写日期: 2006-6-23 <br/> 程序功能描述：日期时间的工具类 <br/>
 * Demo: <br/> Bug: <br/>
 * 
 * 程序变更日期 ：<br/> 变更作者 ：<br/> 变更说明 ：<br/>
 * 
 * @author wuhua </br> <a href="mailto:[e-mail]">[e-mail]</a>
 */

public final class DateTime {
	private static String[] WEEKDAYS_EN = { "SUN", "MON", "TUE", "WED", "THU",
			"FRI", "SAT" };

	private static String[] WEEKDAYS_CH = { "周日", "周一", "周二", "周三", "周四", "周五",
			"周六" };

	public final String timeZone;

	public final int year;

	public final int month;

	public int day;

	public int weekday;

	public final int hour;

	public final int minute;

	public final int second;

	public final int millsecond;

	Calendar c;

	public DateTime(Date date, String timeZone) {
		this.timeZone = timeZone;
		c = timeZone == null ? Calendar.getInstance() : Calendar
				.getInstance(TimeZone.getDefault());
		c.setTime(date);
		year = c.get(Calendar.YEAR);
		month = c.get(Calendar.MONTH);
		day = c.get(Calendar.DAY_OF_MONTH);
		weekday = c.get(Calendar.DAY_OF_WEEK);
		hour = c.get(Calendar.HOUR_OF_DAY);
		minute = c.get(Calendar.MINUTE);
		second = c.get(Calendar.SECOND);
		millsecond = c.get(Calendar.MILLISECOND);
	}

	public DateTime(long time, String timeZone) {
		this(new Date(time), timeZone);
	}

	public DateTime() {
		this(System.currentTimeMillis(), "GMT + 16");
	}

	public static String beforeOneDate() {
		return new DateTime(System.currentTimeMillis() - 24 * 3600 * 1000,
				"GMT+8").toDateString();
	}

	public Date toDate() {
		Calendar c = Calendar.getInstance(TimeZone.getTimeZone(timeZone));
		c.set(Calendar.YEAR, year);
		c.set(Calendar.MONTH, month);
		c.set(Calendar.DAY_OF_MONTH, day);
		c.set(Calendar.HOUR_OF_DAY, hour);
		c.set(Calendar.MINUTE, minute);
		c.set(Calendar.SECOND, second);
		c.set(Calendar.MILLISECOND, millsecond);
		return c.getTime();
	}

	public String toDateString() {
		if (timeZone.equals("GMT-8"))
			return (month + 1) + "月" + day + "日" + " ["
					+ WEEKDAYS_EN[weekday - 1] + "] ";
		else
			return (month + 1) + "月" + day + "日" + " ["
					+ WEEKDAYS_CH[weekday - 1] + "] ";

	}

	public void setDate(int day) {

		this.day = day;
		this.c.set(Calendar.DAY_OF_WEEK, day);
		// day = c.get(Calendar.DAY_OF_WEEK);
		weekday = c.get(Calendar.DAY_OF_WEEK);

	}

	public String toTimeString() {
		return hour + ":" + minute + ":" + second + ":" + millsecond;
	}

	public String toString() {
		return toDateString() + " " + toTimeString();
	}
}