JAVA用Calendar获取月、季度、半年 末日期

用java.util包下的Calendar 实现。

获取月末日期

Calendar calendar = Calendar.getInstance();
//如果要传日期过来 可以set一下
//calendar .setTime(date);  ddate是你传过来的日期
calendar.set(Calendar.DAY_OF_MONTH,calendar.getActualMaximum(Calendar.DAY_OF_MONTH));
System.out.println(calendar.getTime());  //打印 月末最后一天

获取季度末的日期

	Calendar cDay = Calendar.getInstance();   
    int curMonth = cDay.get(Calendar.MONTH); //获取当前月 int
    if (curMonth >= Calendar.JANUARY && curMonth <= Calendar.MARCH){//    >=0   <=2 一个季度    
        cDay.set(Calendar.MONTH, Calendar.MARCH);//set月为2
    }
    if (curMonth >= Calendar.APRIL && curMonth <= Calendar.JUNE){//    >=3   <=5 一个季度  
        cDay.set(Calendar.MONTH, Calendar.JUNE);//set月为5
    }
    if (curMonth >= Calendar.JULY && curMonth <= Calendar.AUGUST) {//    >=6   <=8 一个季度  
        cDay.set(Calendar.MONTH, Calendar.AUGUST);//set月为8
    }
    if (curMonth >= Calendar.OCTOBER && curMonth <= Calendar.DECEMBER) {//    >=9   <=11 一个季度  
        cDay.set(Calendar.MONTH, Calendar.DECEMBER);//set月为11
    }
    cDay.set(Calendar.DAY_OF_MONTH, cDay.getActualMaximum(Calendar.DAY_OF_MONTH));//月末
    //也可以设置小时分钟秒
    //cDay.set(Calendar.HOUR,0);
    //cDay.set(Calendar.MINUTE,0);
    //cDay.set(Calendar.SECOND,0);
    System.out.println(cDay.getTime());

获取半年的日期

Calendar cDay = Calendar.getInstance();
int curMonth = cDay.get(Calendar.MONTH);
if (curMonth >= Calendar.JANUARY && curMonth <= Calendar.JUNE){
    cDay.set(Calendar.MONTH, Calendar.JUNE);
}
if (curMonth >= Calendar.JULY && curMonth <= Calendar.DECEMBER) {
    cDay.set(Calendar.MONTH, Calendar.DECEMBER);
}
cDay.set(Calendar.DAY_OF_MONTH, cDay.getActualMaximum(Calendar.DAY_OF_MONTH));
//也可以设置小时分钟秒
    //cDay.set(Calendar.HOUR,0);
    //cDay.set(Calendar.MINUTE,0);
    //cDay.set(Calendar.SECOND,0);
    System.out.println(cDay.getTime());