java处理日期的工具类DateUtil
java中处理日期的工具类DateUtil，供大家参考，具体内容如下
packagecom.leo.demo.othertest;
importorg.slf4j.LoggerFactory;
importjava.sql.Timestamp;
importjava.text.DateFormat;
importjava.text.ParseException;
importjava.text.SimpleDateFormat;
importjava.util.Calendar;
importjava.util.Date;
importjava.util.GregorianCalendar;
importjava.util.logging.Logger;
/**
*时间工具类
*/
publicfinalclassDateUtil{
privatestaticLoggerlogger=(Logger)LoggerFactory.getLogger(DateUtil.class);
/**
*日期格式
*/
publicinterfaceDATE_PATTERN{
StringHHMMSS="HHmmss";
StringHH_MM_SS="HH:mm:ss";
StringHH_MM="HH:mm";
StringYYYY="yyyy";
StringYYYYMMDD="yyyyMMdd";
StringYYYYMM="yyyyMM";
StringYYYY_MM_DD="yyyy-MM-dd";
StringYYYYMMDDHHMMSS="yyyyMMddHHmmss";
StringYYYYMMDDHHMMSSSSS="yyyyMMddHHmmssSSS";
StringYYYY_MM_DD_HH_MM_SS="yyyy-MM-ddHH:mm:ss";
}
/**
*获取当前时间
*
*@returnTimestamp对象
*/
publicstaticTimestampgetCurrontTime(){
TimestampsqlTimestamp=newTimestamp(newDate().getTime());
returnsqlTimestamp;
}
/**
*将Date类型转换成String类型
*
*@paramdateDate对象
*@return形如:"yyyy-MM-ddHH:mm:ss"
*/
publicstaticStringdate2String(Datedate){
returndate2String(date,DATE_PATTERN.YYYY_MM_DD_HH_MM_SS);
}
/**
*将Date按格式转化成String
*
*@paramdateDate对象
*@parampattern日期类型
*@returnString
*/
publicstaticStringdate2String(Datedate,Stringpattern){
if(date==null||pattern==null){
returnnull;
}
returnnewSimpleDateFormat(pattern).format(date);
}
/**
*将String类型转换成Date类型
*
*@paramdateDate对象
*@return
*/
publicstaticDatestring2Date(Stringdate){
SimpleDateFormatformat=newSimpleDateFormat(DATE_PATTERN.YYYY_MM_DD_HH_MM_SS);
try{
returnformat.parse(date);
}catch(ParseExceptione){
returnnull;
}
}
/**
*获取某日期N天后的日期
*
*@paramdatestr
*@paramday
*@return
*/
publicstaticDategetBeforeAfterDate(Stringdatestr,intday){
SimpleDateFormatdf=newSimpleDateFormat(DATE_PATTERN.YYYY_MM_DD_HH_MM_SS);
java.sql.Dateolddate=null;
try{
df.setLenient(false);
olddate=newjava.sql.Date(df.parse(datestr).getTime());
}catch(ParseExceptione){
thrownewRuntimeException("日期转换错误");
}
Calendarcal=newGregorianCalendar();
cal.setTime(olddate);
intYear=cal.get(Calendar.YEAR);
intMonth=cal.get(Calendar.MONTH);
intDay=cal.get(Calendar.DAY_OF_MONTH);
intNewDay=Day+day;
cal.set(Calendar.YEAR,Year);
cal.set(Calendar.MONTH,Month);
cal.set(Calendar.DAY_OF_MONTH,NewDay);
returnnewDate(cal.getTimeInMillis());
}
/**
*@return
*@Description:获取当前日期的前一天
*@ReturnTypeString
*@author:liyl
*@Created2015年11月13日下午5:11:14
*/
publicstaticDatecurrentBeforeDay(){
Calendarcalendar=Calendar.getInstance();
calendar.setTime(newDate());
calendar.add(Calendar.DAY_OF_MONTH,-1);
returncalendar.getTime();
}
/**
*@return
*@Description:获取当前日期的后一天
*@ReturnTypeDate
*@author:liyl
*@Created2015年11月13日下午5:14:54
*/
publicstaticDatecurrentNextDay(){
Calendarcalendar=Calendar.getInstance();
calendar.setTime(newDate());
calendar.add(Calendar.DAY_OF_MONTH,1);
returncalendar.getTime();
}
/**
*获取指定日期星期几(int)
*
*@paramdt
*@return
*/
publicstaticintgetWeekOfInt(Datedt){
int[]weekDays={7,1,2,3,4,5,6};
Calendarcal=Calendar.getInstance();
cal.setTime(dt);
intw=cal.get(Calendar.DAY_OF_WEEK)-1;
if(w<0){
w=0;
}
returnweekDays[w];
}
/**
*获取指定日期星期几
*
*@paramdt
*@return
*/
publicstaticStringgetWeekOfDate(Datedt){
String[]weekDays={"星期日","星期一","星期二","星期三","星期四","星期五","星期六"};
Calendarcal=Calendar.getInstance();
cal.setTime(dt);
intw=cal.get(Calendar.DAY_OF_WEEK)-1;
if(w<0){
w=0;
}
returnweekDays[w];
}
/**
*时间比大小
*
*@paramDATE1
*@paramDATE2
*@parampattern
*@return
*/
publicstaticintcompareDate(StringDATE1,StringDATE2,Stringpattern){
DateFormatdf=newSimpleDateFormat(pattern);
try{
Datedt1=df.parse(DATE1);
Datedt2=df.parse(DATE2);
if(dt1.getTime()>dt2.getTime()){
System.out.println("dt1在dt2前");
return1;
}elseif(dt1.getTime()-1){
result=date.replace(".","-");
}elseif(date.indexOf("年")>-1){
result=date.replace("年","-").replace("月","-").replace("日","");
}elseif(date.indexOf("-")>-1){
result=date.replace("年","-").replace("月","-").replace("日","");
}else{
result=date;
}
returnresult;
}
/**
*获取两个日期相差的月数
*
*@paramd1较大的日期
*@paramd2较小的日期
*@return如果d1>d2返回月数差否则返回0
*/
publicstaticintmonthsBetween(Dated1,Dated2){
Calendarc1=Calendar.getInstance();
Calendarc2=Calendar.getInstance();
c1.setTime(d1);
c2.setTime(d2);
if(c1.getTimeInMillis()d2返回月数差否则返回0
*/
publicstaticintdaysBetween(Datedate1,Datedate2){
DateFormatsdf=newSimpleDateFormat(DATE_PATTERN.YYYYMMDD);
Calendarcal=Calendar.getInstance();
try{
Dated1=sdf.parse(date2String(date1,DATE_PATTERN.YYYYMMDD));
Dated2=sdf.parse(date2String(date2,DATE_PATTERN.YYYYMMDD));
cal.setTime(d1);
longtime1=cal.getTimeInMillis();
cal.setTime(d2);
longtime2=cal.getTimeInMillis();
returnInteger.parseInt(String.valueOf((time2-time1)/86400000L));
}catch(Exceptione){
e.printStackTrace();
}
return0;
}
/**
*计算date2-date1之间相差的分钟
*
*@paramdate1
*@paramdate2
*@return
*/
@SuppressWarnings("deprecation")
publicstaticintminutesBetween(Datedate1,Datedate2){
Calendarcal=Calendar.getInstance();
//date1.setSeconds(0);
cal.setTime(date1);
longtime1=cal.getTimeInMillis();
cal.setTime(date2);
longtime2=cal.getTimeInMillis();
if(time2-time1<=0){
return0;
}else{
returnInteger.parseInt(String.valueOf((time2-time1)/60000L))+1;
}
}
/**
*计算date2-date1之间相差的秒
*
*@paramdate1
*@paramdate2
*@return
*/
@SuppressWarnings("deprecation")
publicstaticintsecondBetween(Datedate1,Datedate2){
Calendarcal=Calendar.getInstance();
//date1.setSeconds(0);
cal.setTime(date1);
longtime1=cal.getTimeInMillis();
cal.setTime(date2);
longtime2=cal.getTimeInMillis();
if(time2-time1<=0){
return0;
}else{
returnInteger.parseInt(String.valueOf((time2-time1)/1000L))+1;
}
}
/**
*计算date2-date1之间相差的毫秒
*
*@paramdate1
*@paramdate2
*@return
*/
@SuppressWarnings("deprecation")
publicstaticintmillisecondBetween(Datedate1,Datedate2){
Calendarcal=Calendar.getInstance();
cal.setTime(date1);
longtime1=cal.getTimeInMillis();
cal.setTime(date2);
longtime2=cal.getTimeInMillis();
if(time2-time1<=0){
return0;
}else{
returnInteger.parseInt(String.valueOf((time2-time1)));
}
}
}
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