使用DateUtils处理时间日期转换

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public class DateUtils {
public static final long ONE_DAY_LONG = 86400000;
private static DateUtils classInstance = new DateUtils();
public static DateUtils getInstance() {
return classInstance;
}
/**
* Timestamp时间类型转换String
* Created on 2014-6-6
* <p>Discription:[]</p>
* @author:[]
* @update:[日期YYYY-MM-DD] [更改人姓名]
* @param time
* @param pattern
* @return String
*/
public static String timestamp2string(Timestamp time, String pattern) {
Date d = new Date(time.getTime());
if (pattern == null) {
pattern = "yyyy-MM-dd HH:mm:ss";
}
return DateFormatUtils.format(d, pattern);
}
/**
* Date时间类型转换String
* Created on 2014-6-6
* 时间格式yyyy-MM-dd HH:mm
* @param date
* @param pattern
* @return String
*/
public static String formatDate(Date date, String pattern) {
if (date == null) {
date = new Date(System.currentTimeMillis());
}
if (pattern == null) {
pattern = "yyyy-MM-dd HH:mm";
}
return DateFormatUtils.format(date, pattern);
}
/**
* date传null获取当前时间
* 时间格式yyyy-MM-dd HH:mm
* Created on 2014-6-6
* @param date
* @return String
*/
public static String defaultFormat(Date date) {
return formatDate(date, null);
}
/**
* 获取当前时间Date类型
* Created on 2014-6-6
* @return Date
*/
public static Date parseDateFormat() {
SimpleDateFormat fo = new SimpleDateFormat();
Date date = new java.util.Date(System.currentTimeMillis());
fo.applyPattern("yyyy-MM-dd");
try {
date = fo.parse(DateFormatUtils.format(date, "yyyy-MM-dd"));
} catch (Exception e) {
}
return date;
}
/**
* 根据Timestamp类型返回2014-06-06格式String
* Created on 2014-6-6
* @param time
* @return String
*/
public static String parseTimestampFormat(Timestamp time) {
if (time != null && !time.equals("")) {
return parseDateFormat(new Date(time.getTime()));
} else {
return "";
}
}
/**
* 根据Date转换String格式yyyy-MM-dd
* Created on 2014-6-6
* @param date
* @return String
*/
public static String parseDateFormat(Date date) {
SimpleDateFormat fo = new SimpleDateFormat();
fo.applyPattern("yyyy-MM-dd");
String retVal = "0000-00-00";
try {
retVal = DateFormatUtils.format(date, "yyyy-MM-dd");
} catch (Exception e) {
}
return retVal;
}
/**
* 根据String返回Timestamp
* Created on 2014-6-6
* @param value
* @return Timestamp
*/
public static Timestamp formatFromYYYYMMDD(String value) {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Date date = null;
try {
date = sdf.parse(value);
} catch (ParseException e) {
return null;
}
return new Timestamp(date.getTime());
}
public static Timestamp formatFromYYYYMMDDhhmmss(String value) {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Date date = null;
try {
date = sdf.parse(value);
} catch (ParseException e) {
return null;
}
return new Timestamp(date.getTime());
}
public static Date string2Date(String str) {
if (StringUtils.isEmpty(str))
return new Date();
return java.sql.Date.valueOf(str);
}
public static boolean between(Date srcDate, Date startDate, Date endDate) {
if (startDate.after(srcDate))
return false;
if (endDate.before(srcDate))
return false;
return true;
}
public static Date getDayStart(Date date) {
return string2Date(divideDateForDay(date, "yyyy-MM-dd", 0));
// return Timestamp.valueOf(formatDate(date, "yyyy-MM-dd")+" 00:00:00");
}
/**
* 根据传入时间在追加一天
* Created on 2014-6-6
* @param date
* @return
*/
public static Date getDayEnd(Date date) {
return string2Date(divideDateForDay(date, "yyyy-MM-dd", 1));
// return Timestamp.valueOf(formatDate(date, "yyyy-MM-dd")+" 23:59:59");
}
/**
* 给指定时间追加天数
* Created on 2014-6-6
* @param date
* @param pattern 显示格式
* @param num 需要加的天数
* @return
*/
public static String divideDateForDay(Date date, String pattern, int num) {
if (date == null)
date = new Date(System.currentTimeMillis());
if (pattern == null)
pattern = "yyyy-MM-dd HH:mm";
Calendar cal = null;
SimpleDateFormat fo = new SimpleDateFormat();
fo.applyPattern(pattern);
try {
fo.format(date);
cal = fo.getCalendar();
cal.add(Calendar.DATE, num);
} catch (Exception e) {
}
return fo.format(cal.getTime());
}
/**
* 算出两个时间的相差天数
* Created on 2014-6-6
* @param dateBegin
* @param dateEnd
* @return
*/
public static int subtrationDate(Date dateBegin, Date dateEnd) {
GregorianCalendar gc1 = new GregorianCalendar(dateBegin.getYear(),
dateBegin.getMonth(), dateBegin.getDate());
GregorianCalendar gc2 = new GregorianCalendar(dateEnd.getYear(),
dateEnd.getMonth(), dateEnd.getDate());
// the above two dates are one second apart
Date d1 = gc1.getTime();
Date d2 = gc2.getTime();
long l1 = d1.getTime();
long l2 = d2.getTime();
long difference = l2 - l1;
int date = (int) (difference / 24 / 60 / 60 / 1000);
return date;
}
// 当前日期前几天或者后几天的日期
public static Date afterNDay(int n) {
Calendar c = Calendar.getInstance();
c.setTime(new Date());
c.add(Calendar.DATE, n);
Date d2 = c.getTime();
return d2;
}
// 当前日期前几天或者后几天的日期
public static Date afterNDays(Timestamp time, int n) {
Calendar c = Calendar.getInstance();
c.setTimeInMillis(time.getTime());
c.add(Calendar.DATE, n);
Date d2 = c.getTime();
return d2;
}
public static Timestamp transDate(Date date) {
if (date != null) {
long time = date.getTime();
return new Timestamp(time);
}
return null;
}
public static Date transTimestamp(Timestamp time) {
if (time != null) {
long t = time.getTime();
return new Date(t);
}
return null;
}
// 时间段的第一个时间
public static java.sql.Timestamp stringToTime1(String d) {
java.sql.Timestamp t = null;
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd");
Date d1;
try {
if (StringUtils.isNotEmpty(d)) {
d1 = df.parse(d);
t = new Timestamp(d1.getTime());
}
} catch (ParseException e) {
e.printStackTrace();
}
return t;
}
// 时间段的第二个时间
public static java.sql.Timestamp stringToTime2(String d) {
java.sql.Timestamp t = null;
//StringUtils
if (StringUtils.isNotEmpty(d)) {
t = Timestamp.valueOf(d + " 23:59:59");
}
return t;
}
public static Calendar getYesterDayBegin() {
Calendar before = Calendar.getInstance();
before
.set(Calendar.DAY_OF_MONTH,
before.get(Calendar.DAY_OF_MONTH) - 1);
before.set(Calendar.HOUR_OF_DAY, 0);
before.set(Calendar.MINUTE, 0);
before.set(Calendar.SECOND, 0);
before.set(Calendar.MILLISECOND, 0);
return before;
}
/**
* 查看昨天的日期还需要调用transCalendarToTimestamp方法
* Created on 2014-6-6
* @return
*/
public static Calendar getYesterDayEnd() {
Calendar after = Calendar.getInstance();
after.set(Calendar.DAY_OF_MONTH, after.get(Calendar.DAY_OF_MONTH) - 1);
after.set(Calendar.HOUR_OF_DAY, 23);
after.set(Calendar.MINUTE, 59);
after.set(Calendar.SECOND, 59);
after.set(Calendar.MILLISECOND, 999);
return after;
}
/**
* Calendar和Timestamp转换
* @param cal
* @return
*/
public static Timestamp transCalendarToTimestamp(Calendar cal)
{
Timestamp ts = new Timestamp(cal.getTimeInMillis());
return ts;
}
/**
* 根据Timestamp类型参数返回年后两位月日(例如:140606)
* Created on 2014-6-6
* @param time
* @return String
*/
public static String transTimestamptostr(Timestamp time) {
if (time != null) {
java.util.Calendar c = Calendar.getInstance();
c.setTime(time);
String year = String.valueOf(c.get(c.YEAR));
String month = String.valueOf(c.get(c.MONTH) + 1);
String day = String.valueOf(c.get(c.DATE));
if (month.length() < 2)
month = "0" + month;
if (day.length() < 2)
day = "0" + day;
return year.substring(2, 4) + month + day;
}
return null;
}
/**
* 根据Calendar日历返回String
* Created on 2014-6-6
* @param cal
* @return
*/
public static String getDataString(Calendar cal)
{
Calendar now=cal;
String time=now.get(Calendar.YEAR)+"-"+(now.get(Calendar.MONTH)+1)+"-"+now.get(Calendar.DAY_OF_MONTH)+" "+now.get(Calendar.HOUR_OF_DAY)+":"+now.get(Calendar.MINUTE)+":"+now.get(Calendar.SECOND);
return time;
}
public static Calendar parseCalendarDate(String date) {
Calendar d11 = new GregorianCalendar();
Date d1 = null;
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");// 时间格式自己设置
try { // 一定要放到try里面,不然会报错的
d1 = sdf.parse(date);
} catch (Exception e) {
}
d11.setTime(d1); // OK了,d11就是结果了
return d11;
}
public static Timestamp calendar2Timestamp(Calendar cal){
return new Timestamp(cal.getTimeInMillis());
}
public static String getDatePath(){
return DateHelper.CalendarToStrByMark(Calendar.getInstance(), "yyyyMMdd");
}
public static String getDatePath(Calendar cal,String pattern){
if(pattern==null){
pattern="yyyy-MM-dd hh:mm:ss";
}
SimpleDateFormat sf=new SimpleDateFormat(pattern);
return sf.format(cal.getTime());
}
public static String getDateTimePath(){
return DateHelper.CalendarToStrByMark(Calendar.getInstance(), "yyyyMMddHHmmss");
}
//Date转化为Calendar
public static Calendar date2Calendar(Date d){
Calendar cal=Calendar.getInstance();
cal.setTime(d);
return cal;
}
/**
* 日期比较是否相等
* @param d1
* @param d2
* @param type 比较方式，complete,date,
* @return boolean
* @author zhou jun
*/
public static boolean compere(Date d1, Date d2, String type)
{
if(type.equals("date")){
String pattern = "yyyy-MM-dd";
String date1 = formatDate(d1, pattern);
String date2 = formatDate(d2, pattern);
//System.out.println(date1+date2);
if(date1.equals(date2)){
return true;
}
return false;
}
else
{
return d1.equals(d2);
}
}
/**
* 功能: 将日期对象按照某种格式进行转换，返回转换后的字符串
*
* @param date 日期对象
* @param pattern 转换格式例：yyyy-MM-dd
* @author yanhechao
*/
public static String DateToString(Date date, String pattern) {
String strDateTime = null;
SimpleDateFormat formater = new SimpleDateFormat(pattern);
strDateTime = date == null ? null : formater.format(date);
return strDateTime;
}

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