使用java的Calendar对象获得当前日期
思路：
先获得当前季度的开始和结束日期，在当前日期的基础上往前推3个月即上个季度的开始和结束日期
/**
*@paramflagtrue：开始日期；false：结束日期
*@return
*/
publicstaticStringgetLastQuarterTime(booleanflag){
SimpleDateFormatshortSdf=newSimpleDateFormat("yyyy-MM-dd");
SimpleDateFormatlongSdf=newSimpleDateFormat("yyyy-MM-ddHH:mm:ss");
StringresultDate="";
Datenow=null;
try{
Calendarcalendar=Calendar.getInstance();
intcurrentMonth=calendar.get(Calendar.MONTH)+1;
//true：开始日期；false：结束日期
if(flag){
if(currentMonth>=1&¤tMonth<=3)
calendar.set(Calendar.MONTH,0);
elseif(currentMonth>=4&¤tMonth<=6)
calendar.set(Calendar.MONTH,3);
elseif(currentMonth>=7&¤tMonth<=9)
calendar.set(Calendar.MONTH,6);
elseif(currentMonth>=10&¤tMonth<=12)
calendar.set(Calendar.MONTH,9);
calendar.set(Calendar.DATE,1);
now=longSdf.parse(shortSdf.format(calendar.getTime())+"00:00:00");
}else{
if(currentMonth>=1&¤tMonth<=3){
calendar.set(Calendar.MONTH,2);
calendar.set(Calendar.DATE,31);
}elseif(currentMonth>=4&¤tMonth<=6){
calendar.set(Calendar.MONTH,5);
calendar.set(Calendar.DATE,30);
}elseif(currentMonth>=7&¤tMonth<=9){
calendar.set(Calendar.MONTH,8);
calendar.set(Calendar.DATE,30);
}elseif(currentMonth>=10&¤tMonth<=12){
calendar.set(Calendar.MONTH,11);
calendar.set(Calendar.DATE,31);
}
now=longSdf.parse(shortSdf.format(calendar.getTime())+"23:59:59");
}
calendar.setTime(now);//设置日期
calendar.add(Calendar.MONTH,-3);
resultDate=longSdf.format(calendar.getTime());
}catch(Exceptione){
;
}
returnresultDate;
}