Java获取各种常用时间方法

packagecom.hefeng.test;

importjava.text.DateFormat;

importjava.text.ParsePosition;

importjava.text.SimpleDateFormat;

importjava.util.Calendar;

importjava.util.Date;

importjava.util.GregorianCalendar;

publicclassTimeTest{

//用来全局控制上一周，本周，下一周的周数变化

privateintweeks=0;

privateintMaxDate;//一月最大天数

privateintMaxYear;//一年最大天数

/**

*@paramargs

*/

publicstaticvoidmain(String[]args){

TimeTesttt=newTimeTest();

System.out.println("获取当天日期:"+tt.getNowTime("yyyy-MM-dd"));

System.out.println("获取本周一日期:"+tt.getMondayOFWeek());

System.out.println("获取本周日的日期~:"+tt.getCurrentWeekday());

System.out.println("获取上周一日期:"+tt.getPreviousWeekday());

System.out.println("获取上周日日期:"+tt.getPreviousWeekSunday());

System.out.println("获取下周一日期:"+tt.getNextMonday());

System.out.println("获取下周日日期:"+tt.getNextSunday());

System.out.println("获得相应周的周六的日期:"+tt.getNowTime("yyyy-MM-dd"));

System.out.println("获取本月第一天日期:"+tt.getFirstDayOfMonth());

System.out.println("获取本月最后一天日期:"+tt.getDefaultDay());

System.out.println("获取上月第一天日期:"+tt.getPreviousMonthFirst());

System.out.println("获取上月最后一天的日期:"+tt.getPreviousMonthEnd());

System.out.println("获取下月第一天日期:"+tt.getNextMonthFirst());

System.out.println("获取下月最后一天日期:"+tt.getNextMonthEnd());

System.out.println("获取本年的第一天日期:"+tt.getCurrentYearFirst());

System.out.println("获取本年最后一天日期:"+tt.getCurrentYearEnd());

System.out.println("获取去年的第一天日期:"+tt.getPreviousYearFirst());

System.out.println("获取去年的最后一天日期:"+tt.getPreviousYearEnd());

System.out.println("获取明年第一天日期:"+tt.getNextYearFirst());

System.out.println("获取明年最后一天日期:"+tt.getNextYearEnd());

System.out.println("获取本季度第一天到最后一天:"+tt.getThisSeasonTime(11));

System.out.println("获取两个日期之间间隔天数2008-12-1~2008-9.29:"+TimeTest.getTwoDay("2008-12-1","2008-9-29"));

}

/**

*得到二个日期间的间隔天数

*/

publicstaticStringgetTwoDay(Stringsj1,Stringsj2){

SimpleDateFormatmyFormatter=newSimpleDateFormat("yyyy-MM-dd");

longday=0;

try{

java.util.Datedate=myFormatter.parse(sj1);

java.util.Datemydate=myFormatter.parse(sj2);

day=(date.getTime()-mydate.getTime())/(24*60*60*1000);

}catch(Exceptione){

return"";

}

returnday+"";

}

/**

*根据一个日期，返回是星期几的字符串

*

*@paramsdate

*@return

*/

publicstaticStringgetWeek(Stringsdate){

//再转换为时间

Datedate=TimeTest.strToDate(sdate);

Calendarc=Calendar.getInstance();

c.setTime(date);

//inthour=c.get(Calendar.DAY_OF_WEEK);

//hour中存的就是星期几了，其范围1~7

//1=星期日7=星期六，其他类推

returnnewSimpleDateFormat("EEEE").format(c.getTime());

}

/**

*将短时间格式字符串转换为时间yyyy-MM-dd

*

*@paramstrDate

*@return

*/

publicstaticDatestrToDate(StringstrDate){

SimpleDateFormatformatter=newSimpleDateFormat("yyyy-MM-dd");

ParsePositionpos=newParsePosition(0);

Datestrtodate=formatter.parse(strDate,pos);

returnstrtodate;

}

/**

*两个时间之间的天数

*

*@paramdate1

*@paramdate2

*@return

*/

publicstaticlonggetDays(Stringdate1,Stringdate2){

if(date1==null||date1.equals(""))

return0;

if(date2==null||date2.equals(""))

return0;

//转换为标准时间

SimpleDateFormatmyFormatter=newSimpleDateFormat("yyyy-MM-dd");

java.util.Datedate=null;

java.util.Datemydate=null;

try{

date=myFormatter.parse(date1);

mydate=myFormatter.parse(date2);

}catch(Exceptione){

}

longday=(date.getTime()-mydate.getTime())/(24*60*60*1000);

returnday;

}

//计算当月最后一天,返回字符串

publicStringgetDefaultDay(){

Stringstr="";

SimpleDateFormatsdf=newSimpleDateFormat("yyyy-MM-dd");

CalendarlastDate=Calendar.getInstance();

lastDate.set(Calendar.DATE,1);//设为当前月的1号

lastDate.add(Calendar.MONTH,1);//加一个月，变为下月的1号

lastDate.add(Calendar.DATE,-1);//减去一天，变为当月最后一天

str=sdf.format(lastDate.getTime());

returnstr;

}

//上月第一天

publicStringgetPreviousMonthFirst(){

Stringstr="";

SimpleDateFormatsdf=newSimpleDateFormat("yyyy-MM-dd");

CalendarlastDate=Calendar.getInstance();

lastDate.set(Calendar.DATE,1);//设为当前月的1号

lastDate.add(Calendar.MONTH,-1);//减一个月，变为下月的1号

//lastDate.add(Calendar.DATE,-1);//减去一天，变为当月最后一天

str=sdf.format(lastDate.getTime());

returnstr;

}

//获取当月第一天

publicStringgetFirstDayOfMonth(){

Stringstr="";

SimpleDateFormatsdf=newSimpleDateFormat("yyyy-MM-dd");

CalendarlastDate=Calendar.getInstance();

lastDate.set(Calendar.DATE,1);//设为当前月的1号

str=sdf.format(lastDate.getTime());

returnstr;

}

//获得本周星期日的日期

publicStringgetCurrentWeekday(){

weeks=0;

intmondayPlus=this.getMondayPlus();

GregorianCalendarcurrentDate=newGregorianCalendar();

currentDate.add(GregorianCalendar.DATE,mondayPlus+6);

Datemonday=currentDate.getTime();

DateFormatdf=DateFormat.getDateInstance();

StringpreMonday=df.format(monday);

returnpreMonday;

}

//获取当天时间

publicStringgetNowTime(Stringdateformat){

Datenow=newDate();

SimpleDateFormatdateFormat=newSimpleDateFormat(dateformat);//可以方便地修改日期格式

Stringhehe=dateFormat.format(now);

returnhehe;

}

//获得当前日期与本周日相差的天数

privateintgetMondayPlus(){

Calendarcd=Calendar.getInstance();

//获得今天是一周的第几天，星期日是第一天，星期二是第二天......

intdayOfWeek=cd.get(Calendar.DAY_OF_WEEK)-1;//因为按中国礼拜一作为第一天所以这里减1

if(dayOfWeek==1){

return0;

}else{

return1-dayOfWeek;

}

}

//获得本周一的日期

publicStringgetMondayOFWeek(){

weeks=0;

intmondayPlus=this.getMondayPlus();

GregorianCalendarcurrentDate=newGregorianCalendar();

currentDate.add(GregorianCalendar.DATE,mondayPlus);

Datemonday=currentDate.getTime();

DateFormatdf=DateFormat.getDateInstance();

StringpreMonday=df.format(monday);

returnpreMonday;

}

//获得相应周的周六的日期

publicStringgetSaturday(){

intmondayPlus=this.getMondayPlus();

GregorianCalendarcurrentDate=newGregorianCalendar();

currentDate.add(GregorianCalendar.DATE,mondayPlus+7*weeks+6);

Datemonday=currentDate.getTime();

DateFormatdf=DateFormat.getDateInstance();

StringpreMonday=df.format(monday);

returnpreMonday;

}

//获得上周星期日的日期

publicStringgetPreviousWeekSunday(){

weeks=0;

weeks--;

intmondayPlus=this.getMondayPlus();

GregorianCalendarcurrentDate=newGregorianCalendar();

currentDate.add(GregorianCalendar.DATE,mondayPlus+weeks);

Datemonday=currentDate.getTime();

DateFormatdf=DateFormat.getDateInstance();

StringpreMonday=df.format(monday);

returnpreMonday;

}

//获得上周星期一的日期

publicStringgetPreviousWeekday(){

weeks--;

intmondayPlus=this.getMondayPlus();

GregorianCalendarcurrentDate=newGregorianCalendar();

currentDate.add(GregorianCalendar.DATE,mondayPlus+7*weeks);

Datemonday=currentDate.getTime();

DateFormatdf=DateFormat.getDateInstance();

StringpreMonday=df.format(monday);

returnpreMonday;

}

//获得下周星期一的日期

publicStringgetNextMonday(){

weeks++;

intmondayPlus=this.getMondayPlus();

GregorianCalendarcurrentDate=newGregorianCalendar();

currentDate.add(GregorianCalendar.DATE,mondayPlus+7);

Datemonday=currentDate.getTime();

DateFormatdf=DateFormat.getDateInstance();

StringpreMonday=df.format(monday);

returnpreMonday;

}

//获得下周星期日的日期

publicStringgetNextSunday(){

intmondayPlus=this.getMondayPlus();

GregorianCalendarcurrentDate=newGregorianCalendar();

currentDate.add(GregorianCalendar.DATE,mondayPlus+7+6);

Datemonday=currentDate.getTime();

DateFormatdf=DateFormat.getDateInstance();

StringpreMonday=df.format(monday);

returnpreMonday;

}

privateintgetMonthPlus(){

Calendarcd=Calendar.getInstance();

intmonthOfNumber=cd.get(Calendar.DAY_OF_MONTH);

cd.set(Calendar.DATE,1);//把日期设置为当月第一天

cd.roll(Calendar.DATE,-1);//日期回滚一天，也就是最后一天

MaxDate=cd.get(Calendar.DATE);

if(monthOfNumber==1){

return-MaxDate;

}else{

return1-monthOfNumber;

}

}

//获得上月最后一天的日期

publicStringgetPreviousMonthEnd(){

Stringstr="";

SimpleDateFormatsdf=newSimpleDateFormat("yyyy-MM-dd");

CalendarlastDate=Calendar.getInstance();

lastDate.add(Calendar.MONTH,-1);//减一个月

lastDate.set(Calendar.DATE,1);//把日期设置为当月第一天

lastDate.roll(Calendar.DATE,-1);//日期回滚一天，也就是本月最后一天

str=sdf.format(lastDate.getTime());

returnstr;

}

//获得下个月第一天的日期

publicStringgetNextMonthFirst(){

Stringstr="";

SimpleDateFormatsdf=newSimpleDateFormat("yyyy-MM-dd");

CalendarlastDate=Calendar.getInstance();

lastDate.add(Calendar.MONTH,1);//减一个月

lastDate.set(Calendar.DATE,1);//把日期设置为当月第一天

str=sdf.format(lastDate.getTime());

returnstr;

}

//获得下个月最后一天的日期

publicStringgetNextMonthEnd(){

Stringstr="";

SimpleDateFormatsdf=newSimpleDateFormat("yyyy-MM-dd");

CalendarlastDate=Calendar.getInstance();

lastDate.add(Calendar.MONTH,1);//加一个月

lastDate.set(Calendar.DATE,1);//把日期设置为当月第一天

lastDate.roll(Calendar.DATE,-1);//日期回滚一天，也就是本月最后一天

str=sdf.format(lastDate.getTime());

returnstr;

}

//获得明年最后一天的日期

publicStringgetNextYearEnd(){

Stringstr="";

SimpleDateFormatsdf=newSimpleDateFormat("yyyy-MM-dd");

CalendarlastDate=Calendar.getInstance();

lastDate.add(Calendar.YEAR,1);//加一个年

lastDate.set(Calendar.DAY_OF_YEAR,1);

lastDate.roll(Calendar.DAY_OF_YEAR,-1);

str=sdf.format(lastDate.getTime());

returnstr;

}

//获得明年第一天的日期

publicStringgetNextYearFirst(){

Stringstr="";

SimpleDateFormatsdf=newSimpleDateFormat("yyyy-MM-dd");

CalendarlastDate=Calendar.getInstance();

lastDate.add(Calendar.YEAR,1);//加一个年

lastDate.set(Calendar.DAY_OF_YEAR,1);

str=sdf.format(lastDate.getTime());

returnstr;

}

//获得本年有多少天

privateintgetMaxYear(){

Calendarcd=Calendar.getInstance();

cd.set(Calendar.DAY_OF_YEAR,1);//把日期设为当年第一天

cd.roll(Calendar.DAY_OF_YEAR,-1);//把日期回滚一天。

intMaxYear=cd.get(Calendar.DAY_OF_YEAR);

returnMaxYear;

}

privateintgetYearPlus(){

Calendarcd=Calendar.getInstance();

intyearOfNumber=cd.get(Calendar.DAY_OF_YEAR);//获得当天是一年中的第几天

cd.set(Calendar.DAY_OF_YEAR,1);//把日期设为当年第一天

cd.roll(Calendar.DAY_OF_YEAR,-1);//把日期回滚一天。

intMaxYear=cd.get(Calendar.DAY_OF_YEAR);

if(yearOfNumber==1){

return-MaxYear;

}else{

return1-yearOfNumber;

}

}

//获得本年第一天的日期

publicStringgetCurrentYearFirst(){

intyearPlus=this.getYearPlus();

GregorianCalendarcurrentDate=newGregorianCalendar();

currentDate.add(GregorianCalendar.DATE,yearPlus);

DateyearDay=currentDate.getTime();

DateFormatdf=DateFormat.getDateInstance();

StringpreYearDay=df.format(yearDay);

returnpreYearDay;

}

//获得本年最后一天的日期*

publicStringgetCurrentYearEnd(){

Datedate=newDate();

SimpleDateFormatdateFormat=newSimpleDateFormat("yyyy");//可以方便地修改日期格式

Stringyears=dateFormat.format(date);

returnyears+"-12-31";

}

//获得上年第一天的日期*

publicStringgetPreviousYearFirst(){

Datedate=newDate();

SimpleDateFormatdateFormat=newSimpleDateFormat("yyyy");//可以方便地修改日期格式

Stringyears=dateFormat.format(date);intyears_value=Integer.parseInt(years);

years_value--;

returnyears_value+"-1-1";

}

//获得上年最后一天的日期

publicStringgetPreviousYearEnd(){

weeks--;

intyearPlus=this.getYearPlus();

GregorianCalendarcurrentDate=newGregorianCalendar();

currentDate.add(GregorianCalendar.DATE,yearPlus+MaxYear*weeks+(MaxYear-1));

DateyearDay=currentDate.getTime();

DateFormatdf=DateFormat.getDateInstance();

StringpreYearDay=df.format(yearDay);

getThisSeasonTime(11);

returnpreYearDay;

}

//获得本季度

publicStringgetThisSeasonTime(intmonth){

intarray[][]={{1,2,3},{4,5,6},{7,8,9},{10,11,12}};

intseason=1;

if(month>=1&&month<=3){

season=1;

}

if(month>=4&&month<=6){

season=2;

}

if(month>=7&&month<=9){

season=3;

}

if(month>=10&&month<=12){

season=4;

}

intstart_month=array[season-1][0];

intend_month=array[season-1][2];

Datedate=newDate();

SimpleDateFormatdateFormat=newSimpleDateFormat("yyyy");//可以方便地修改日期格式

Stringyears=dateFormat.format(date);

intyears_value=Integer.parseInt(years);

intstart_days=1;//years+"-"+String.valueOf(start_month)+"-1";//getLastDayOfMonth(years_value,start_month);

intend_days=getLastDayOfMonth(years_value,end_month);

StringseasonDate=years_value+"-"+start_month+"-"+start_days+";"+years_value+"-"+end_month+"-"+end_days;

returnseasonDate;

}

/**

*获取某年某月的最后一天

*@paramyear年

*@parammonth月

*@return最后一天

*/

privateintgetLastDayOfMonth(intyear,intmonth){

if(month==1||month==3||month==5||month==7||month==8

||month==10||month==12){

return31;

}

if(month==4||month==6||month==9||month==11){

return30;

}

if(month==2){

if(isLeapYear(year)){

return29;

}else{

return28;

}

}

return0;

}

/**

*是否闰年

*@paramyear年

*@return

*/

publicbooleanisLeapYear(intyear){

return(year%4==0&&year%100!=0)||(year%400==0);

}

}