com.rt.core.util.TimeUtil Maven / Gradle / Ivy
/*
* Created on 2005-7-13
*
* 时间工具类.
*/
package com.rt.core.util;
import com.rt.core.constant.RTConst;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
/**
* 时间工具
*/
class TimeUtil {
/**
* SimpleDateFormat到格式的日期
*
* @param formatString
* @return SimpleDateFormat
*/
private static SimpleDateFormat getDateFormatter(String format) {
SimpleDateFormat formatter = new SimpleDateFormat(format);
// workaround for bug
formatter.setTimeZone(java.util.TimeZone.getDefault());
// don't alllow things like 1/35/99
formatter.setLenient(false);
return formatter;
}
/**
* 获得当前时间Calendar格式
*
* @param date
* Date
* @return Calendar
*/
public static Calendar getCalendar(Date date) {
if (date == null) {
return null;
}
Calendar now = Calendar.getInstance();
now.setTime(date);
return now;
}
/**
* 获得当前时间Calendar格式
*
* @param longDate
* longDate
* @return Calendar
*/
public static Calendar getCalendar(long longDate) {
Calendar now = Calendar.getInstance();
now.setTimeInMillis(longDate);
return now;
}
/**
* 得到当前时间
*
* @return Date
*/
public static Date getDate() {
return new Date();
}
/**
* 得到指定格式的日期字符串
*
* @param format
* @return nowDate String.
*/
public static String getDateToString(String format) {
return getDateFormatter(format).format(getDate());
}
/**
* 得到当前时间的毫秒部分
*
* @return String SSS
*/
public static String getDateToSecond() {
return getDateToString(RTConst.SECOND_CODE);
}
/**
* 转换现在的时间为Long格式 以毫秒为单位计算,从1970年1月1日0时0分0秒0000毫秒算起.
*
* @return longDate long
*/
public static long getDateTolong() {
return getDate().getTime();
}
/**
* @see dateTolong
*
* @return longDate Long
*/
public static Long getDateToLong() {
return new Long(getDate().getTime());
}
/**
* this.dateTolong
*
* @return longDate string
*/
public static String getDateToString() {
return String.valueOf(getDate().getTime());
}
/**
* long转换为日期
*
* @param longDate
* @return Date
*/
public static Date toDate(String longDate) {
return new Date(RTUtil.tolong(longDate));
}
/**
* long转换为日期
*
* @param longDate
* @return Date
*/
public static Date toDate(long longDate) {
return new Date(longDate);
}
/**
* long转换为日期
*
* @param longDate
* @return Date
*/
public static Date toDate(Long longDate) {
if (longDate == null) {
return null;
}
return new Date(longDate.longValue());
}
/**
* String到Date格式的转换
*
* @param dateString
* like 1970/01/01
* @param formatString
* @return date Date
*/
public static Date toDate(String date, String format) {
try {
return getDateFormatter(format).parse(date);
} catch (Exception e) {
return null;
}
}
/**
* date到String格式的转换
*
* @param date
* @param format
* @return date String
*/
public static String toStringDate(Date date, String format) {
return getDateFormatter(format).format(date);
}
/**
* stringDate转为long型
*
* @param stringDate
* @param format
* @return long
*/
public static long tolongDate(String stringDate, String format) {
Date d = toDate(stringDate, format);
return d == null ? 0 : d.getTime();
}
/**
* stringDate转为long型
*
* @param stringDate
* @param format
* @return Long
*/
public static Long toLongDate(String stringDate, String format) {
Date d = toDate(stringDate, format);
return d == null ? null : new Long(d.getTime());
}
/**
* long or integer型转换成date string
*
* @param longDate
* @param format
* @return StringDate
*/
public static String toStringDate(String longDate, String format) {
return toStringDate(toDate(RTUtil.tolong(longDate)), format);
}
/**
* long or integer型转换成date string
*
* @param longDate
* @param format
* @return StringDate
*/
public static String toStringDate(long longDate, String format) {
return toStringDate(toDate(longDate), format);
}
/**
* long or integer型转换成date string
*
* @param longDate
* @param format
* @return StringDate
*/
public static String toStringDate(Long longDate, String format) {
if (longDate == null) {
return null;
}
return toStringDate(toDate(longDate), format);
}
/**
* 取得某月最后一天的日期整数值
*
* @param year
* 年(yyyy)
* @param month
* 月(mm或m)
* @return int 日期整数值
*/
public static int getMaxDayOfMonth(String year, String month) {
Calendar c = Calendar.getInstance();
c.set(Calendar.YEAR, Integer.parseInt(year));
c.set(Calendar.MONTH, Integer.parseInt(month) - 1);
return c.getActualMaximum(Calendar.DAY_OF_MONTH);
}
/**
* 按生日转换成年龄
*
* @param birthday
* @return int
*/
public static int getAgeOfBirthday(String birthday) {
if (RTUtil.isEmpty(birthday)) {
return 0;
}
return getAgeOfBirthday(toDate(birthday, "yyyy-MM-dd"));
}
/**
* 按生日转换成年龄
*
* @param birthday
* @return int
*/
public static int getAgeOfBirthday(Date birthday) {
Calendar brith = getCalendar(birthday);
Calendar now = getCalendar(getDate());
int age = now.get(Calendar.YEAR) - brith.get(Calendar.YEAR);
int month = now.get(Calendar.MONTH) - brith.get(Calendar.MONTH);
int day = now.get(Calendar.DATE) - brith.get(Calendar.DATE);
if (day < 0) {
month--;
}
if (month < 0) {
age--;
}
return age;
}
}