java实现计算周期性提醒的示例

可以计算父亲节、母亲节这样的节日，也可以定义如每月最好一个周五，以方便安排会议。

/**
*
* @param strdate
*            开始日期，格式为yyyy-mm-dd hh:mm:ss
* @param cyclepriod
*            重复间隔
* @param looppriod
*            重复类型，m=月，d=日，y=年，w=周，h=小时，f=分钟,s=秒
*            mn=月正数第几天，mb=月倒数第几天，如mb2为倒数第2天
*            w1..7=每周几，mn1w2=月第一个周2，mb2w4=月倒数第2个周四
*    w后的值可以是多值，w135代表周1、周3、周五
* @param islunar
*            是否为阴历，传入的值必须为阳历，按阴历计算后返回的依然是阳历。目前阴历只有月和年的计算不同 其他重复类型根据需要再添加
* @return
*/
public static string nexttime(string strdate, int cyclepriod,
string looppriod, boolean islunar) {
string returnvalue = "";

int[] dates = dateutils.gendate(strdate);

chinesecalendar ccalendar = new chinesecalendar();
ccalendar.setgregorianyear(dates[0]);
ccalendar.setgregorianmonth(dates[1]);
ccalendar.setgregoriandate(dates[2]);

if ("m".equalsignorecase(looppriod)) // 处理月
{
if (islunar) {
for (int i = 0; i < cyclepriod; i++) {
ccalendar.nextchinesemonth();
}
returnvalue = dateutils.gendate(ccalendar.getgregorianyear(),
ccalendar.getgregorianmonth(),
ccalendar.getgregoriandate());
} else {
returnvalue = dateutils.caldate(strdate, cyclepriod, 2);
}
} else if ("d".equalsignorecase(looppriod)) // 处理日
{
returnvalue = dateutils.caldate(strdate, cyclepriod, 5);

} else if ("y".equalsignorecase(looppriod)) // 处理年
{
if (islunar) {
ccalendar.addchineseyear(cyclepriod);
returnvalue = dateutils.gendate(ccalendar.getgregorianyear(),
ccalendar.getgregorianmonth(),
ccalendar.getgregoriandate());
} else {
returnvalue = dateutils.caldate(strdate, cyclepriod, 1);
}

} else if ("w".equalsignorecase(looppriod)) // 处理周
{
returnvalue = dateutils.caldate(strdate, cyclepriod, 3);

} else if ("h".equalsignorecase(looppriod)) // 处理小时
{
returnvalue = timeutils.addtime(strdate, 0, cyclepriod);
} else if ("f".equalsignorecase(looppriod)) // 处理分钟
{
returnvalue = timeutils.addtime(strdate, 1, cyclepriod);

} else if ("s".equalsignorecase(looppriod)) // 处理秒
{
returnvalue = timeutils.addtime(strdate, 2, cyclepriod);

} else // 处理非常规周期
{
if ("m".equalsignorecase(stringutils.left(looppriod, 1))) {
string mnb = looppriod.substring(1, 2);
string wnb = "";
int mnbvalue = 0;
int wnbvalue = 0;
if (looppriod.indexof("w") > 1) {
wnb = looppriod.substring(looppriod.indexof("w") + 1,
looppriod.indexof("w") + 2);
mnbvalue = integer.parseint(looppriod.substring(2,
looppriod.indexof("w")));
wnbvalue = integer.parseint(looppriod.substring(
looppriod.indexof("w") + 1, looppriod.length()));
if ("n".equalsignorecase(mnb)) {
returnvalue = getbeforeweekday(strdate, mnbvalue,
wnbvalue);
} else if ("b".equalsignorecase(mnb)) {
returnvalue = getbackweekday(strdate, mnbvalue,
wnbvalue);
}

} else {
mnbvalue = integer.parseint(looppriod.substring(2,
looppriod.length())) - 1;
if ("n".equalsignorecase(mnb)) {
returnvalue = caldate(givemonthfirst(strdate),
mnbvalue, 5);
} else if ("b".equalsignorecase(mnb)) {
returnvalue = caldate(givemonthlast(strdate),
-mnbvalue, 5);

}
}
} else if ("w".equalsignorecase(stringutils.left(looppriod, 1))) {
string week = stringutils.right(looppriod,
looppriod.length() - 1);
strdate = caldate(strdate, cyclepriod - 1, 3);
while (true) {

strdate = caldate(strdate, 1, 5);
if (week.indexof(string.valueof(getweekday(strdate))) >= 0) {
returnvalue = strdate;
break;
}
}
}
}

return returnvalue;
}