日期时间处理类（DateUtil）
/*
* DataUtil.java
* Created on 2005-3-8
* Copyright (c) jobcn.com. All rights reserved.
*/
package com.jobcn.util;
import java.text.DateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.TimeZone;
/**
* 日期工具.
* @author Loist Loh
*/
public class DateUtil
{
private Calendar calendar;
private final DateFormat df_date = DateFormat.getDateInstance();
private final DateFormat df_time = DateFormat.getTimeInstance();
private final String[] WEEKNAME_CHINESE = new String[]{"星期一","星期二","星期三","星期四","星期五","星期六","星期日"};
private final String[] WEEKNAME_ENGLISH_LONG = new String[]{"Monday","Tuesday","Wednesday","Thursday","Friday","Saturday","Sunday"};
private final String[] WEEKNAME_ENGLISH_SHORT = new String[]{"Mon","Tue","Wed","Thu","Fri","Sat","Sun"};
private final String[] MONTHNAME_ENGLISH_LONG = new String[]{"January","February","March","April","May","June","July","August","September","October","November","December"};
private final String[] MONTHNAME_ENGLISH_SHORT = new String[]{"Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"};
public final static int YEAR = Calendar.YEAR;
public final static int MONTH = Calendar.MONTH;
public final static int DAY = Calendar.DAY_OF_MONTH;
public final static int HOUR = Calendar.HOUR_OF_DAY;
public final static int MINUTE = Calendar.MINUTE;
public final static int SECOND = Calendar.SECOND;
/**
* 构造函数.
*/
public DateUtil()
{
calendar = Calendar.getInstance();
calendar.setTimeZone(TimeZone.getTimeZone("GMT+8:00"));
}
/**
* 构造函数.
* @param calendar Calendar 实例.
*/
public DateUtil(Calendar calendar)
{
this.calendar = calendar;
calendar.setTimeZone(TimeZone.getTimeZone("GMT+8:00"));
}
/**
* 构造函数.
* @param strDate 字符串形式的日期.
*/
public DateUtil(String strDate)
{
try
{
this.calendar = Calendar.getInstance();
this.calendar.setTime(DateFormat.getDateTimeInstance().parse(strDate));
calendar.setTimeZone(TimeZone.getTimeZone("GMT+8:00"));
}
catch (Exception e)
{
System.out.println("转换日期出错!");
}
}
/**
* 设置 Calendar 实例.
* @param calendar Calendar 实例.
*/
public void setCalendar(Calendar calendar)
{
this.calendar = calendar;
calendar.setTimeZone(TimeZone.getTimeZone("GMT+8:00"));
}
/**
* 获得日期.
* @return 日期. 格式 "2005-4-11"
*/
public String getDate()
{
String theResult = "";
theResult = getDate(false);
return theResult;
}
/**
* 获得日期.
* fixupLength 为 true 时,日期格式为: 2005-03-01
* fixupLength 为 false 时,日期格式为: 2005-3-1
* @param fixupLength 日期格式.
* fixupLength 为 true 时,日期格式为: 2005-03-01
* fixupLength 为 false 时,日期格式为: 2005-3-1
* @return 日期. 格式 "2005-04-11"
*/
public String getDate(boolean fixLength)
{
String theResult = "";
if (fixLength)
{
String strMonth = String.valueOf(this.getMonth());
String strDay = String.valueOf(this.getDay());
theResult = this.getYear()
+ "-"
+ (strMonth.length() < 2 ? ("0" + strMonth) : strMonth)
+ "-"
+ (strDay.length() < 2 ? ("0" + strDay) : strDay)
;
}
else
{
theResult = df_date.format(calendar.getTime());
}
return theResult;
}
/**
* 年.
* @return 年.
*/
public int getYear()
{
return calendar.get(Calendar.YEAR);
}
/**
* 月.
* @return 月.
*/
public int getMonth()
{
return calendar.get(Calendar.MONTH) + 1;
}
/**
* 月份的英语完整表述.
* @return 月份.
*/
public String getMonthForEnglishLong()
{
return MONTHNAME_ENGLISH_LONG[this.getMonth() - 1];
}
/**
* 月份的英语简短表述.
* @return 月份.
*/
public String getMonthForEnglishShort()
{
return MONTHNAME_ENGLISH_SHORT[this.getMonth() - 1];
}
/**
* 月份的第几天.
* @return 月份的第几天.
*/
public int getDay()
{
return calendar.get(Calendar.DAY_OF_MONTH);
}
/**
* 星期几, 数字表述.
* @return 星期几.
*/
public int getWeek()
{
int theResult;
theResult = calendar.get(Calendar.DAY_OF_WEEK) - 1;
theResult = theResult == 0 ? 7 : theResult;
return theResult;
}
/**
* 星期几, 中文表述.
* @return 星期几, 中文表述.
*/
public String getWeekForChinese()
{
return WEEKNAME_CHINESE[this.getWeek() - 1];
}
/**
* 星期几, 英语的完整表述.
* @return 星期几, 英语的完整表述.
*/
public String getWeekForEnglishLong()
{
return WEEKNAME_ENGLISH_LONG[this.getWeek() - 1];
}
/**
* 星期几, 英语的简短表述.
* @return 星期几, 英语的简短表述.
*/
public String getWeekForEnglishShort()
{
return WEEKNAME_ENGLISH_SHORT[this.getWeek() - 1];
}
/**
* 时间. 格式: 8:23:25.
* @return 时间.
*/
public String getTime()
{
//String theResult = "";
//theResult = df_time.format(calendar.getTime());
return getTime(false);
}
/**
* 时间. 格式:08:23:25.
* @param fixLength
* @return
*/
public String getTime(boolean fixLength)
{
String theResult = "";
if (fixLength)
{
String strHour = String.valueOf(this.getHour());
String strMinute = String.valueOf(this.getMinute());
String strSecond = String.valueOf(this.getSecond());
theResult = (strHour.length() < 2 ? ("0" + strHour) : strHour)
+ ":"
+ (strMinute.length() < 2 ? ("0" + strMinute) : strMinute)
+ ":"
+ (strSecond.length() < 2 ? ("0" + strSecond) : strSecond)
;
}
else
{
theResult = df_time.format(calendar.getTime());
}
return theResult;
}
/**
* 小时. 24 小时制.
* @return 小时.
*/
public int getHour()
{
return calendar.get(Calendar.HOUR_OF_DAY);
}
/**
* 分钟.
* @return 分钟.
*/
public int getMinute()
{
return calendar.get(Calendar.MINUTE);
}
/**
* 秒数.
* @return 秒数.
*/
public int getSecond()
{
return calendar.get(Calendar.SECOND);
}
/**
* 日期时间. 格式"2005-04-11 17:37:55"
* @return 日期时间. 格式"2005-04-11 17:37:55"
*/
public String getDateTime()
{
return this.getDate(true) + " " + this.getTime(true);
}
/**
* 获得日期对象的毫秒数.
* @return 日期对象的毫秒数.
*/
public long getMillionSecone()
{
return this.calendar.getTime().getTime();
}
/**
* 获得日期对象.
* @return 日期对象.
*/
public Date getDateObject()
{
return this.calendar.getTime();
}
/**
* 日期加减.
* @param field 段
* @param amount 值.
*/
public void add(int field, int amount)
{
switch(field)
{
case YEAR: calendar.add(YEAR, amount);break;
case MONTH: calendar.add(MONTH, amount);break;
case DAY: calendar.add(DAY, amount);break;
case HOUR: calendar.add(HOUR, amount);break;
case MINUTE: calendar.add(MINUTE, amount);break;
case SECOND: calendar.add(SECOND, amount);break;
}
}
public static void main(String[] args)
{
// String s = DateUtil.getStrOfTime(100000);
DateUtil du = new DateUtil("2008-01-01 01:00:00");
// System.out.println(du.getDate(true));
// System.out.println(du.getTime());
// du.add(DateUtil.MINUTE, -3);
//
System.out.println(du.getDate(true));
System.out.println(du.getMillionSecone());
/*
try
{
Thread.sleep(3000);
}catch(Exception e){}
du.setCalendar(Calendar.getInstance());
System.out.println(du.getTime());
Calendar calendar = Calendar.getInstance();
calendar.setFirstDayOfWeek(2);
System.out.println(calendar.getFirstDayOfWeek());
du.add(du.HOUR, 2);
System.out.println(du.getYear());
System.out.println(du.getMonth());
System.out.println(du.getDay());
System.out.println(du.getWeek());
System.out.println(du.getWeekForChinese());
System.out.println(du.getWeekForEnglishShort());
System.out.println(du.getWeekForEnglishLong());
System.out.println(du.getMonthForEnglishLong());
System.out.println(du.getMonthForEnglishShort());
*/
}
}