DateUtil

/**
* www.yiji.com Inc.
* Copyright (c) 2011 All Rights Reserved.
*/
package com.yjf.borncrm.common.util;

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

import com.yjf.common.lang.util.StringUtil;
import com.yjf.common.log.Logger;
import com.yjf.common.log.LoggerFactory;

/**
*
* @Filename DateUtil.java
*
* @Description
*
* @Version 1.0
*
* @Author peigen
*
* @Email qchunhai@yiji.com
*
* @History <li>Author: qichunhai</li> <li>Date: 2012-10-24</li> <li>Version:
* 1.0</li> <li>Content: create</li>
*
*/
public class DateUtil {

static final Logger logger = LoggerFactory.getLogger(DateUtil.class);

/**
* 格式化日期为带时分秒的格式
* @param date
* @return
*/
public static final String formatDateTime(Date date) {
return formatDateTime(com.yjf.common.lang.util.DateUtil.simple, date);
}

public static final long formatLong(Date date) {
if (date == null)
return 0l;
return NumberUtil
.parseLong(formatDateTime(com.yjf.common.lang.util.DateUtil.dtShort, date));
}

public static final String formatDateTime(String formatString, Date date) {
try {
return com.yjf.common.lang.util.DateUtil.getFormat(formatString).format(date);
} catch (Exception e) {
logger.error(e.getMessage() + " date =" + date);
}
return null;
}

public static final Date parseDateTime(String formatString, String dateString) {
try {
return com.yjf.common.lang.util.DateUtil.getFormat(formatString).parse(dateString);
} catch (Exception e) {
logger.error(e.getMessage() + " date =" + dateString);
}
return null;
}

/**
* 格式化日期为天 2012-01-01
* @param date
* @return
*/
public static final String formatDay(Date date) {
return formatDateTime(com.yjf.common.lang.util.DateUtil.dtSimple, date);
}

/**
* 把日期字符串 转换当天的开始时间点00:00:00
* @param date
* @return
*/
public static final Date parseDayBegin(String date) {
if (StringUtil.isNotEmpty(date) && date.length() == 10)
date = date + " 00:00:00";
return parseDateTime(com.yjf.common.lang.util.DateUtil.simple, date);
}

/**
* 把日期字符串 转换当天的最后时间点23:59:59
* @param date 格式 yyyy-MM-dd
* @return
*/
public static final Date parseDayEnd(String date) {
if (StringUtil.isNotEmpty(date) && date.length() == 10)
date = date + " 23:59:59";
return parseDateTime(com.yjf.common.lang.util.DateUtil.simple, date);
}

/**
* 把日期字符串 转换当天的最后时间点23:59:59
* @param date 格式 yyyy-MM-dd
* @return
*/
public static final Date parseDayEnd(Date date) {
if (date == null)
return null;
String strDate = formatDay(date);
return parseDayEnd(strDate);
}

/**
* 把日期字符串 转换当天的开始时间点00:00:00
* @param date
* @return
*/
public static final Date parseDayBegin(Date date) {
if (date == null)
return null;
String strDate = formatDay(date);
return parseDayBegin(strDate);
}

/**
* @param date 格式 yyyy-MM-dd HH:mm:ss
* @return
*/
public static final Date parseDateTime(String date) {
return parseDateTime(com.yjf.common.lang.util.DateUtil.simple, date);
}

/**
* @param date 格式 yyyy-MM-dd
* @return
*/
public static final Date parseDtSimpleTime(String date) {
return parseDateTime(com.yjf.common.lang.util.DateUtil.dtSimple, date);
}

/**
* 校验结束时间减去开始时间是否在minutes分钟以内 countMinutes = end-start; countMinutes >
* minutes ,return true; countMinutes <= minutes ,return false;
* @param start
* @param end
* @param minutes
* @return
*/
public static boolean checkMinute(Date start, Date end, int minutes) {
if ((start == null) || (end == null)) {
return false;
}
long countMinutes = ((end.getTime() - start.getTime()) / (1000 * 60));
return countMinutes > minutes;
}

/**
* 获取当前的年份
* @return
*/
public static String getThisYear() {
Date date = new Date();
String dateStr = com.yjf.common.lang.util.DateUtil.dtSimpleFormat(date);
String thisYear = StringUtil.substring(dateStr, 0, 4);
return thisYear;
}

/**
* 判断date到今天是否超过days个工作日 （该方法只处理了星期六 星期天）
* @param date 时间
* @param days 天数
* @return
*/
public static boolean isSurpassByDay(Date date, int days) {
boolean result = false;
Date withholdDay = date;
Date newToday = new Date();
Date increaseDay = withholdDay;
if (!(com.yjf.common.lang.util.DateUtil.isDefaultWorkingDay(withholdDay))) {
withholdDay = com.yjf.common.lang.util.DateUtil.getEndTimeOfTheDate(withholdDay);
}
for (int i = 0; i < days;) {
increaseDay = com.yjf.common.lang.util.DateUtil.increaseDate(increaseDay, 1);
if (com.yjf.common.lang.util.DateUtil.isDefaultWorkingDay(increaseDay)) {
i++;
}
}
if (increaseDay.getTime() < newToday.getTime()) {
result = true;
}
return result;
}

/**
* 判断date到endDate是否超过days个工作日 （该方法只处理了星期六 星期天）
* @param date
* @param endDate
* @param days
* @return 超过返回true
*/
public static boolean isSurpassByDay(Date date, Date endDate, int days) {
boolean result = false;
Date withholdDay = date;
Date increaseDay = withholdDay;
if (!(com.yjf.common.lang.util.DateUtil.isDefaultWorkingDay(withholdDay))) {
withholdDay = com.yjf.common.lang.util.DateUtil.getEndTimeOfTheDate(withholdDay);
}
for (int i = 0; i < days;) {
increaseDay = com.yjf.common.lang.util.DateUtil.increaseDate(increaseDay, 1);
if (com.yjf.common.lang.util.DateUtil.isDefaultWorkingDay(increaseDay)) {
i++;
}
}
if (increaseDay.getTime() < endDate.getTime()) {
result = true;
}
return result;
}

/**
* 计算今天，转换格式后贴在页面上
* @param date
* @param endDate
* @param days
* @return
*/
public static String getHeadMessage() {
String message = "";
Date date = new Date();
// message += com.yjf.common.lang.util.DateUtil.dtSimpleChineseFormat(date);
// message += " ";
// message += com.yjf.common.lang.util.DateUtil.getWeekDay(date);
message = DateFormat.getDateInstance(DateFormat.FULL).format(date);
return message;
}

public static Date addDate(Date d,long day){
long time = d.getTime();
day = day*24*60*60*1000;
time-=day;
return new Date(time);
}

/**
* 获取前天
*
* @return
*/
public static Date beforeYesterday() {
Calendar cad = Calendar.getInstance();
cad.setTime(new Date());
cad.add(Calendar.DATE, -2);
return cad.getTime();
}

/**
* 获取昨天
* @return
*/
public static Date yesterday() {
Calendar cad = Calendar.getInstance();
cad.setTime(new Date());
cad.add(Calendar.DATE, -1);
return cad.getTime();
}

/**
* 获取前？天
*/
public static Date yesterdayBefore(int n){
Calendar c=Calendar.getInstance();
c.setTime(new Date());
c.add(Calendar.DATE,-n);
return c.getTime();
}
/**
* 获取一个月前开始的时间
* @return
*/
public static Date getOneMonthBegin() {

Calendar cal = Calendar.getInstance();
cal.set(Calendar.MONTH, cal.get(Calendar.MONTH) - 1);
cal.set(Calendar.DATE, 1);
return cal.getTime();
}

/**
* 获取一个月前结束的时间
* @return
*/
public static Date getOneMonthEnd() {

Calendar cal = Calendar.getInstance();
cal.set(Calendar.MONTH, cal.get(Calendar.MONTH));
cal.set(Calendar.DAY_OF_MONTH, 0);
return cal.getTime();
}

/**
* 获取二个月前开始的时间
* @return
*/
public static Date getTwoMonthBegin() {

Calendar cal = Calendar.getInstance();
cal.set(Calendar.MONTH, cal.get(Calendar.MONTH) - 2);
cal.set(Calendar.DATE, 1);
return cal.getTime();
}

/**
* 获取二个月前结束的时间
* @return
*/
public static Date getTwoMonthEnd() {

Calendar cal = Calendar.getInstance();
cal.set(Calendar.MONTH, cal.get(Calendar.MONTH) - 1);
cal.set(Calendar.DAY_OF_MONTH, 0);
return cal.getTime();
}

/**
* 获取本月开始的时间
* @return
*/
public static Date getThisMonthBegin() {

Calendar cal = Calendar.getInstance();
cal.set(Calendar.MONTH, cal.get(Calendar.MONTH) );
cal.set(Calendar.DATE, 1);

return cal.getTime();
}

/**
* 获取本月初第一天的同一时间
* @return
*/
public static Date getMonthBegin() {

Calendar cal = Calendar.getInstance();
cal.set(Calendar.DAY_OF_MONTH, 1);
return cal.getTime();
}

/**
* 获取当月初第一天的同一时间
* @return
*/
public static Date getMonthBegin(Date date) {

Calendar cal = Calendar.getInstance();
cal.setTime(date);
cal.set(Calendar.DAY_OF_MONTH, 1);
return cal.getTime();
}


/**
* 获取该月份的天数
*/
public static int getDaysOfMonth(Date date){
Calendar cal = Calendar.getInstance();
cal.setTime(date);
return cal.getActualMaximum(Calendar.DATE);

}

/**
* 获取当月莫一天的同一时间
* @return
*/
public static Date getDayOfMonth(Date date,int dayN) {
Calendar cal = Calendar.getInstance();
cal.setTime(date);
cal.set(Calendar.DAY_OF_MONTH, dayN);
return cal.getTime();
}

/**
* 获取当月最后一天的同一时间
*/
public static Date getMonthEnd(Date date){
int nDays=DateUtil.getDaysOfMonth(date);
Calendar cal = Calendar.getInstance();
cal.setTime(date);
cal.set(Calendar.DAY_OF_MONTH, nDays);
return cal.getTime();
}

/**
* 获取?个月前时间
* @return
*/
public static Date getNMonth(int n) {

Calendar cal = Calendar.getInstance();
cal.set(Calendar.MONTH, cal.get(Calendar.MONTH) - n);

return cal.getTime();
}

/**
* 字符串转换成日期
* @param str
* @return date
*/
public static Date strToDate(String str) {

SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
Date date = null;
try {
date = format.parse(str);
} catch (Exception e) {
e.printStackTrace();
}
return date;
}
}