日期工具类

package cn.wsria.util.date;

import java.sql.Time;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Collections;
import java.util.Comparator;
import java.util.Date;
import java.util.List;

/**
* Title： 日期工具类
* Description：
*
* @author 闫洪磊
*/
public class DateUtil {

public final static String FORMAT_DATE = "yyyy-MM-dd";
public final static String FORMAT_DATETIME = "yyyy-MM-dd HH:mm:ss";

public final static String FORMAT_DATE_ZH = "yyyy年MM月dd日";
public final static String FORMAT_DATETIME_ZH = "yyyy年MM月dd日 HH时mm分ss秒";

public final static String TYPE_DATE = "date";
public final static String TYPE_DATETIME = "datetime";

/**
* 日期排序类型-升序
*/
public final static int DATE_ORDER_ASC = 0;

/**
* 日期排序类型-降序
*/
public final static int DATE_ORDER_DESC = 1;

/**
* 用字符串获得日期
* @throws ParseException
* @dateValue 日期字符串
* @dateType 格式化的类型,date和datetime
*/
public static Date getDate(String dateValue, String dateType) throws ParseException {
if (dateValue == null)
return null;
if (dateType.equals(TYPE_DATE)) {
SimpleDateFormat sfdate = new SimpleDateFormat(FORMAT_DATE);
return sfdate.parse(dateValue);
} else if (dateType.equals(TYPE_DATETIME)) {
SimpleDateFormat sftime = new SimpleDateFormat(FORMAT_DATETIME);
return sftime.parse(dateValue);
}
return null;
}

/**
* 用字符串获得java.sql.Date日期
* @throws ParseException
* @dateValue 日期字符串
* @dateType 格式化的类型,date和datetime
*/
public static java.sql.Date getSqlDate(String dateValue, String dateType) throws ParseException {
Date date = getDate(dateValue, dateType);
if (date == null) {
return null;
}
return new java.sql.Date(date.getTime());
}

/**
*将日期加上某些天或减去天数)返回字符串
* @param date 待处理日期
* @param to 加减的天数
* @return 日期
*/
public static Date dateAdd(String date, int to) {
java.util.Date d = null;
try {
d = java.sql.Date.valueOf(date);
} catch (Exception e) {
e.printStackTrace();
d = new java.util.Date();
}
Calendar strDate = Calendar.getInstance();
strDate.setTime(d);
strDate.add(Calendar.DATE, to); // 日期减如果不够减会将月变动
return strDate.getTime();
}

/**
*将日期加上某些天或减去天数)返回字符串
* @param date 待处理日期
* @param to 加减的天数
* @return 日期
*/
public static java.sql.Date dateAdd(java.sql.Date date, int to) {
Calendar strDate = Calendar.getInstance();
strDate.setTime(date);
strDate.add(Calendar.DATE, to); // 日期减如果不够减会将月变动
return new java.sql.Date(strDate.getTime().getTime());
}

/**
* 格式化日期
* @param date 日期对象
* @param splitChar 分隔字符
* @return
*/
public static String formatDate(Date date, String splitChar) {
java.text.SimpleDateFormat sfdate = new java.text.SimpleDateFormat("yyyy" + splitChar
+ "MM" + splitChar + "dd");
return sfdate.format(date);
}

/**
* @dateValue 日期对象，可以是java.util.Date和java.sql.Date
* @dateType 格式化的类型,date和datetime
*/
public static String format(Object dateValue, String dateType) {
if (dateValue == null)
return "";
if (dateValue instanceof java.sql.Date) {
return dateValue.toString();
} else if (dateValue instanceof java.util.Date) {
if (dateType.equals(TYPE_DATE)) {
java.text.SimpleDateFormat sfdate = new java.text.SimpleDateFormat(FORMAT_DATE);
return sfdate.format(dateValue);
} else if (dateType.equals(TYPE_DATETIME)) {
java.text.SimpleDateFormat sftime = new java.text.SimpleDateFormat(FORMAT_DATETIME);
return sftime.format(dateValue);
} else {
return "非法日期格式[" + dateType + "]";
}
} else {
return "非日期类型";
}
}

/**
* 转换日期对象为中文化日期
* @dateValue 日期对象，可以是java.util.Date和java.sql.Date
* @dateType 格式化的类型,date和datetime
*/
public static String formatZh(Date dateValue, String dateType) {
if (dateValue == null)
return "";
if (dateValue instanceof java.sql.Date) {
return dateValue.toString();
} else if (dateValue instanceof java.util.Date) {
if (dateType.equals(TYPE_DATE)) {
java.text.SimpleDateFormat sfdate = new java.text.SimpleDateFormat(FORMAT_DATE_ZH);
return sfdate.format(dateValue);
} else if (dateType.equals(TYPE_DATETIME)) {
java.text.SimpleDateFormat sftime = new java.text.SimpleDateFormat(FORMAT_DATETIME_ZH);
return sftime.format(dateValue);
} else {
return "非法日期格式[" + dateType + "]";
}
} else {
return "非日期类型";
}
}

/**
* 转化成年月日期
* @param sDate 字符型日期：2009-02-02
* @param DelimeterChar 分割符号比如 / -
* @return 年月日期 :2009年02月02日
*/
public static String chDateChange(String sDate, String DelimeterChar) {
String tmpArr[] = sDate.split(DelimeterChar);
tmpArr[0] = tmpArr[0] + "年";
tmpArr[1] = tmpArr[1] + "月";
tmpArr[2] = tmpArr[2] + "日";
return tmpArr[0] + tmpArr[1] + tmpArr[2];
}

/**
* 得到系统日期
* @return YYYY-MM-DD
*/
public static String getSysdate() {
java.sql.Timestamp timeNow = new java.sql.Timestamp(System.currentTimeMillis());
return timeNow.toString().substring(0, 10);
}

/**
* 得到系统日期
* @return YYYY-MM-DD
*/
public static String getSysdate(String formatType) {
java.sql.Timestamp timeNow = new java.sql.Timestamp(System.currentTimeMillis());
return formatZh(timeNow, formatType);
}

/**
* 得到某天是周几
* @param strDay
* @return 周几
*/
public static int getWeekDay(String strDay) {
Date day = DateUtil.dateAdd(strDay, -1);
Calendar strDate = Calendar.getInstance();
strDate.setTime(day);
int meStrDate = strDate.get(Calendar.DAY_OF_WEEK);
return meStrDate;
}

/**
* 得到某天是周几
* @param strDay
* @return 周几
*/
public static int getWeekDay(Date date) {
Date day = DateUtil.dateAdd(format(date, "date"), -1);
Calendar strDate = Calendar.getInstance();
strDate.setTime(day);
int meStrDate = strDate.get(Calendar.DAY_OF_WEEK);
return meStrDate;
}

/**
* 取得两个日期段的日期间隔
*
* @author color
* @param t1 时间1
* @param t2 时间2
* @return t2 与t1的间隔天数
* @throws ParseException
* 如果输入的日期格式不是0000-00-00 格式抛出异常
*/
public static int getBetweenDays(String t1, String t2) throws ParseException {
DateFormat format = new SimpleDateFormat("yyyy-MM-dd");
int betweenDays = 0;
Date d1 = format.parse(t1);
Date d2 = format.parse(t2);
betweenDays = getBetweenDays(d1, d2);
return betweenDays;
}

/**
* 取得两个日期段的日期间隔
*
* @author color
* @param t1 时间1
* @param t2 时间2
* @param swapDate 当日期1小于日期2时是否交换两个日期值
* @return t2 与t1的间隔天数
* @throws ParseException
* 如果输入的日期格式不是0000-00-00 格式抛出异常
*/
public static int getBetweenDays(String t1, String t2, boolean swapDate) throws ParseException {
DateFormat format = new SimpleDateFormat("yyyy-MM-dd");
int betweenDays = 0;
Date d1 = format.parse(t1);
Date d2 = format.parse(t2);
betweenDays = getBetweenDays(d1, d2, swapDate);
return betweenDays;
}

/**
* 取得两个日期段的日期间隔
* @param d1 日期1
* @param d2 日期2
* @param swapDate 当日期1小于日期2时是否交换两个日期值
* @return t2 与t1的间隔天数
*/
public static int getBetweenDays(Date d1, Date d2, boolean swapDate) {
if (d1 == null || d2 == null) {
return -1;
}
int betweenDays;
Calendar c1 = Calendar.getInstance();
Calendar c2 = Calendar.getInstance();
c1.setTime(d1);
c2.setTime(d2);
if (swapDate) {
// 保证第二个时间一定大于第一个时间
if (c1.after(c2)) {
c2.setTime(d1);
c1.setTime(d2);
}
}
int betweenYears = c2.get(Calendar.YEAR) - c1.get(Calendar.YEAR);
betweenDays = c2.get(Calendar.DAY_OF_YEAR) - c1.get(Calendar.DAY_OF_YEAR);
for (int i = 0; i < betweenYears; i++) {
c1.set(Calendar.YEAR, (c1.get(Calendar.YEAR) + 1));
betweenDays += c1.getMaximum(Calendar.DAY_OF_YEAR);
}
return betweenDays;
}

/**
* 取得两个日期段的日期间隔
* @param d1 日期1
* @param d2 日期2
* @return t2 与t1的间隔天数
*/
private static int getBetweenDays(Date d1, Date d2) {
if (d1 == null || d2 == null) {
return -1;
}
int betweenDays;
Calendar c1 = Calendar.getInstance();
Calendar c2 = Calendar.getInstance();
c1.setTime(d1);
c2.setTime(d2);
// 保证第二个时间一定大于第一个时间
if (c1.after(c2)) {
c2.setTime(d1);
c1.setTime(d2);
}
int betweenYears = c2.get(Calendar.YEAR) - c1.get(Calendar.YEAR);
betweenDays = c2.get(Calendar.DAY_OF_YEAR) - c1.get(Calendar.DAY_OF_YEAR);
for (int i = 0; i < betweenYears; i++) {
c1.set(Calendar.YEAR, (c1.get(Calendar.YEAR) + 1));
betweenDays += c1.getMaximum(Calendar.DAY_OF_YEAR);
}
return betweenDays;
}

/**
* 判断指定日期是否在一个日期范围内
* @param fromDate 范围开始日期
* @param toDate 范围结束日期
* @param testDate 测试日期
* @return 在范围内true,否则false
*/
public static boolean betweenDays(java.sql.Date fromDate, java.sql.Date toDate, java.sql.Date testDate) {
if (fromDate == null || toDate == null || testDate == null) {
return false;
}

//1、交换开始和结束日期
if (fromDate.getTime() > toDate.getTime()) {
java.sql.Date tempDate = fromDate;
fromDate = toDate;
toDate = tempDate;
}

//2、缩小范围
long testDateTime = testDate.getTime();
if ( (testDateTime > fromDate.getTime() && testDateTime > toDate.getTime())
|| testDateTime < fromDate.getTime() && testDateTime < toDate.getTime()) {
return false;
}

return true;
}

/**
* 得到指定年、月的最后一天
* @param year 年
* @param month 月
* @return 本年月的最后一天，如果2009,10，返回结果：2009-10-31
*/
public static String getLastDateDayOfMonth(int year, int month) {
Calendar cal = Calendar.getInstance();
cal.set(Calendar.YEAR, year);
cal.set(Calendar.MONTH, month);
// 某年某月的最后一天
int lastDate = cal.getActualMaximum(Calendar.DATE);
return year + "-" + (month + 1) + "-" + lastDate;
}

/**
* 判断两个日期是否为同一天
* @param d1 日期一
* @param d2 日期二
* @return 同一天true，不是同一天false
*/
public static boolean isSameDate(Date d1, Date d2) {
boolean result = false;
Calendar c1 = Calendar.getInstance();
c1.setTime(d1);

Calendar c2 = Calendar.getInstance();
c2.setTime(d2);

if (c1.get(Calendar.YEAR) == c2.get(Calendar.YEAR)
&& c1.get(Calendar.MONTH) == c2.get(Calendar.MONTH)
&& c1.get(Calendar.DAY_OF_MONTH) == c2.get(Calendar.DAY_OF_MONTH)) {
result = true;
}
return result;
}

/**
* 获取当前系统时间，24小时制
* @return 当前系统时间
*/
public static Time getSystemTime() {
Calendar c1 = Calendar.getInstance();
int hour = c1.get(Calendar.HOUR_OF_DAY);
int minute = c1.get(Calendar.MINUTE);
int second = c1.get(Calendar.SECOND);
Time systemTime = Time.valueOf(hour + ":" + minute + ":" + second);
return systemTime;
}

/**
* 是否为周末
* @param strDate
* @return true|false
*/
public static boolean isWeekend(String strDate) {
int weekDay = getWeekDay(strDate);
if (weekDay == 6 || weekDay == 7) {
return true;
} else {
return false;
}
}

/**
* 是否为周末
* @param strDate
* @return true|false
*/
public static boolean isWeekend(Date date) {
int weekDay = getWeekDay(format(date, "date"));
if (weekDay == 6 || weekDay == 7) {
return true;
} else {
return false;
}
}

/**
* 是否为法定节假日
* @param strDate
* @return true|false
*/
public static boolean isHoliday(String strDate) {
return false;
}

/**
* 日期排序
* @param dates 日期列表
* @param orderType 排序类型
* {@link #DATE_ORDER_ASC} 
* {@link #DATE_ORDER_DESC}
* @return 排序结果
*/
public static List<? extends java.util.Date> orderDate(List<? extends java.util.Date> dates, int orderType) {
DateComparator comp = new DateComparator(orderType);
Collections.sort(dates, comp);
return dates;
}

/**
* 日期分组 
* 能够对指定日期列表按照连续性分组 
* 例如：[2010-01-15, 2010-01-16, 2010-01-17, 2010-01-20, 2010-01-21, 2010-01-25] 
* 分组结果为： 
* <ul>
* <li>[2010-01-15, 2010-01-16, 2010-01-17]</li>
* <li>[2010-01-20, 2010-01-21]</li>
* <li>[2010-01-25]</li>
* </ul>
* @param dates 日期对象
* @return 连续性分组结果
*/
public static List<List<? extends java.util.Date>> groupDates(List<? extends java.util.Date> dates) {
List<List<? extends java.util.Date>> result = new ArrayList<List<? extends java.util.Date>>();

// 按照升序排序
orderDate(dates, DateUtil.DATE_ORDER_ASC);

// 临时结果
List<Date> tempDates = null;

// 上一组最后一个日期
Date lastDate = null;

// 当前读取日期
Date cdate = null;
for (int i = 0; i < dates.size(); i++) {
cdate = dates.get(i);

// 第一次增加
if (tempDates == null) {
tempDates = new ArrayList<Date>();
tempDates.add(cdate);
result.add(tempDates);
} else {
/**
* 差距为1是继续在原有的列表中添加，大于1就是用新的列表
*/
lastDate = tempDates.get(tempDates.size() - 1);
int days = getBetweenDays(lastDate, cdate);
if (days == 1) {
tempDates.add(cdate);
} else {
tempDates = new ArrayList<Date>();
tempDates.add(cdate);
result.add(tempDates);
}
}

}

return result;
}

public static List<java.sql.Date> getBetweenDates(java.sql.Date fromDate, java.sql.Date toDate) {
List<java.sql.Date> result = new ArrayList<java.sql.Date>();
// 如果开始日期大于结束日期交换
if (toDate.getTime() < fromDate.getTime()) {
java.sql.Date tempDate = fromDate;
fromDate = toDate;
toDate = tempDate;
}

Calendar ca = Calendar.getInstance();
while ( fromDate.getTime() <= toDate.getTime() ) {
ca.setTime(fromDate);
java.sql.Date tempDate = new java.sql.Date(ca.getTime().getTime());
result.add(tempDate);
ca.add(Calendar.DATE, 1);
fromDate = new java.sql.Date(ca.getTime().getTime());
}

return result;
}

public static List<java.sql.Date> getAllDate(List<java.sql.Date[]> dateList) {
List<java.sql.Date> result = new ArrayList<java.sql.Date>();
for (Object[] objs : dateList) {
if (objs[0] == null || objs[1] == null) {
continue;
}
java.sql.Date date1 = (java.sql.Date) objs[0];
java.sql.Date date2 = (java.sql.Date) objs[1];
List<java.sql.Date> betweenDates = getBetweenDates(date1, date2);
for (java.sql.Date date : betweenDates) {
if (!result.contains(date)) {
result.add(date);
}
}
}
return result;
}

/**
* 将出生日期与当前日期相减，获得年龄
* @param birthdayDate
* @return
*/
public static int getAge(Date birthdayDate) {
String formatCurrent = new SimpleDateFormat("yyyy-MM-dd").format(new Date());

int firstCu = formatCurrent.indexOf("-");
int lastCu = formatCurrent.lastIndexOf("-");
String currentYearStr = formatCurrent.substring(0, firstCu);
String currentMonthStr = formatCurrent.substring(firstCu + 1, lastCu);
String currentDayStr = formatCurrent.substring(lastCu + 1);
int currentYear = Integer.valueOf(currentYearStr);
int currentMonth = Integer.valueOf(currentMonthStr);
int currentDay = Integer.valueOf(currentDayStr);

String formatBirthday = new SimpleDateFormat("yyyy-MM-dd").format(birthdayDate);

int first = formatBirthday.indexOf("-");
int last = formatBirthday.lastIndexOf("-");
String birthYearStr = formatBirthday.substring(0, first);
String birthMonthStr = formatBirthday.substring(first + 1, last);
String birthDayStr = formatBirthday.substring(last + 1);

int birthYear = Integer.valueOf(birthYearStr);
int birthMonth = Integer.valueOf(birthMonthStr);
int birthDay = Integer.valueOf(birthDayStr);

if (currentMonth > birthMonth) {
return currentYear-birthYear;
} else if (currentMonth == birthMonth) {
if (currentDay >= birthDay) {
return currentYear-birthYear;
} else {
return currentYear-birthYear - 1;
}
} else {
return currentYear-birthYear - 1;
}
}

/**
* 获取年月，例如 201009
* @param dateObj
* @return
*/
public static String getYearMonth(Date dateObj) {
if (dateObj == null) {
return "";
}
Calendar ca = Calendar.getInstance();
ca.setTime(dateObj);
int month = ca.get(Calendar.MONTH) + 1;
String strMonth = month < 10 ? ("0" + month) : String.valueOf(month);
String yearMonth = ca.get(Calendar.YEAR) + strMonth;
return yearMonth;
}

/**
* 根据指定年月计算上月年月标示 
* @param yearMonth
* @return 201010返回201009，201001返回200912
*/
public static String getPreYearMonth(String yearMonth) {
if (yearMonth.length() == 6) {
int year = Integer.valueOf(yearMonth.substring(0, 4));
int month = Integer.valueOf(yearMonth.substring(4));
if (month != 1) {
month -= 1;
} else {
year -= 1;
month = 12;
}
return year + (month < 10 ? "0" + month : String.valueOf(month));
}
return "";
}

/**
* 获取当前年份
*/
public static Integer getCurrentYear() {
Calendar ca = Calendar.getInstance();
return ca.get(Calendar.YEAR);
}

/**
* 获取当前月份
*/
public static Integer getCurrentMonth() {
Calendar ca = Calendar.getInstance();
return ca.get(Calendar.MONTH) + 1;
}

public static void main(String[] args) {
String preYearMonth = getPreYearMonth("201001");
System.out.println(preYearMonth);
}

}

/**
* Title：日期大小比较
* Description：实现比较接口，按照排序类型[升序,降序]排列日期集合
*
* @author 闫洪磊
*/
class DateComparator implements Comparator<Date> {

int orderType;

public DateComparator(int orderType) {
this.orderType = orderType;
}

public int compare(Date d1, Date d2) {
if (d1.getTime() > d2.getTime()) {
if (orderType == DateUtil.DATE_ORDER_ASC) {
return 1;
} else {
return -1;
}
} else {
if (d1.getTime() == d2.getTime()) {
return 0;
} else {
if (orderType == DateUtil.DATE_ORDER_DESC) {
return 1;
} else {
return -1;
}
}
}
}

}

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Change log
r13 by yanhonglei on Oct 15, 2010 Diff

1、从其他项目复制util包的各种工具类
2、添加地区信息的实体、DAO、Service和测试类

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来自：http://ssh-2009-126-com.iteye.com/blog/1680631